diff --git a/vendor/github.com/uber/jaeger-client-go/.gitignore b/vendor/github.com/uber/jaeger-client-go/.gitignore
new file mode 100644
index 0000000..2734907
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/.gitignore
@@ -0,0 +1,15 @@
+*.out
+*.test
+*.xml
+*.swp
+.idea/
+.tmp/
+*.iml
+*.cov
+*.html
+*.log
+gen/thrift/js
+gen/thrift/py
+vendor/
+crossdock-main
+crossdock/jaeger-docker-compose.yml
diff --git a/vendor/github.com/uber/jaeger-client-go/.gitmodules b/vendor/github.com/uber/jaeger-client-go/.gitmodules
new file mode 100644
index 0000000..295ebcf
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "idl"]
+	path = idl
+	url = https://github.com/uber/jaeger-idl.git
diff --git a/vendor/github.com/uber/jaeger-client-go/.travis.yml b/vendor/github.com/uber/jaeger-client-go/.travis.yml
new file mode 100644
index 0000000..435aea1
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/.travis.yml
@@ -0,0 +1,56 @@
+sudo: required
+
+language: go
+go_import_path: github.com/uber/jaeger-client-go
+
+dist: trusty
+
+matrix:
+  include:
+  # - go: 1.15.x
+  #   env:
+  #   - TESTS=true
+  #   - USE_DEP=true
+  #   - COVERAGE=true
+  - go: 1.15.x
+    env:
+    - USE_DEP=true
+    - CROSSDOCK=true
+  # - go: 1.15.x
+  #   env:
+  #   - TESTS=true
+  #   - USE_DEP=false
+  #   - USE_GLIDE=true
+  # test with previous version of Go
+  # - go: 1.14.x
+  #   env:
+  #   - TESTS=true
+  #   - USE_DEP=true
+  #   - CI_SKIP_LINT=true
+
+services:
+  - docker
+
+env:
+  global:
+    - DOCKER_COMPOSE_VERSION=1.8.0
+    - COMMIT=${TRAVIS_COMMIT::8}
+    # DOCKER_PASS
+    - secure: "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"
+    # DOCKER_USER
+    - secure: "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"
+
+install:
+  - make install-ci USE_DEP=$USE_DEP
+  - if [ "$CROSSDOCK" == true ]; then bash ./travis/install-crossdock-deps.sh ; fi
+
+script:
+  - if [ "$TESTS" == true ]; then make test-ci ; else echo 'skipping tests'; fi
+  - if [ "$CROSSDOCK" == true ]; then bash ./travis/build-crossdock.sh ; else echo 'skipping crossdock'; fi
+
+after_success:
+  - if [ "$COVERAGE" == true ]; then mv cover.out coverage.txt ; else echo 'skipping coverage'; fi
+  - if [ "$COVERAGE" == true ]; then bash <(curl -s https://codecov.io/bash) ; else echo 'skipping coverage'; fi
+
+after_failure:
+  - if [ "$CROSSDOCK" == true ]; then timeout 5 docker-compose -f crossdock/docker-compose.yml logs; fi
diff --git a/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md b/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
new file mode 100644
index 0000000..956790e
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/CHANGELOG.md
@@ -0,0 +1,390 @@
+Changes by Version
+==================
+
+2.29.2 (unreleased)
+-------------------
+- Nothing yet.
+
+
+2.29.1 (2021-05-24)
+-------------------
+- Remove dependency on "testing" in "thrift" (#586) -- @yurishkuro
+
+
+2.29.0 (2021-05-20)
+-------------------
+- Update vendored thrift to 0.14.1 (#584) -- @nhatthm
+
+
+2.28.0 (2021-04-30)
+-------------------
+- HTTPSamplingStrategyFetcher: Use http client with 10 second timeout (#578) -- Joe Elliott
+
+
+2.27.0 (2021-04-19)
+-------------------
+- Don't override HTTP Reporter batch size to 1; default to 100, user can override (#571) -- R. Aidan Campbell
+
+
+2.26.0 (2021-04-16)
+-------------------
+- Delete a baggage item when value is blank (#562) -- evan.kim
+- Trim baggage key when parsing (#566) -- sicong.huang
+- feat: extend configuration to support custom randomNumber func (#555) -- NemoO_o
+- Support JAEGER_TRACEID_128BIT env var (#547) -- Yuri Shkuro
+- Additional context protections (#544) -- Joe Elliott
+- Lock RemotelyControlledSampler.sampler on callbacks (#543) -- Dima
+- Upgrade build to Go 1.15 (#539) -- Yuri Shkuro
+- Upgrade to jaeger-lib@2.3.0 to fix broken codahale/hdrhistogram dependency (#537) -- Yuri Shkuro
+- Prefix TraceID/SpanID.String() with zeroes (#533) -- Lukas Vogel
+- Upgrade to OpenTracing Go 1.2 (#525) -- Yuri Shkuro
+
+
+2.25.0 (2020-07-13)
+-------------------
+## Breaking changes
+- [feat] Periodically re-resolve UDP server address, with opt-out (#520) -- Trevor Foster
+
+  The re-resolving of UDP address is now enabled by default, to make the client more robust in Kubernetes deployments.
+  The old resolve-once behavior can be restored by setting DisableAttemptReconnecting=true in the Configuration struct,
+  or via JAEGER_REPORTER_ATTEMPT_RECONNECTING_DISABLED=true environment variable.
+
+## Bug fixes
+- Do not add invalid context to references (#521) -- Yuri Shkuro
+
+
+2.24.0 (2020-06-14)
+-------------------
+- Mention FromEnv() in the README, docs, and examples (#518) -- Martin Lercher
+- Serialize access to RemotelyControlledSampler.sampler (#515) -- Dima
+- Override reporter config only when agent host/port is set in env (#513) -- ilylia
+- Converge on JAEGER_SAMPLING_ENDPOINT env variable (#511) -- Eundoo Song
+
+
+2.23.1 (2020-04-28)
+-------------------
+- Fix regression by handling nil logger correctly ([#507](https://github.com/jaegertracing/jaeger-client-go/pull/507)) -- Prithvi Raj
+
+
+2.23.0 (2020-04-22)
+-------------------
+
+- Add the ability to log all span interactions at a new debug log level([#502](https://github.com/jaegertracing/jaeger-client-go/pull/502), [#503](https://github.com/jaegertracing/jaeger-client-go/pull/503), [#504](https://github.com/jaegertracing/jaeger-client-go/pull/504)) -- Prithvi Raj
+- Chore (docs): fix typos ([#496](https://github.com/jaegertracing/jaeger-client-go/pull/496), [#498](https://github.com/jaegertracing/jaeger-client-go/pull/498)) -- Febrian Setianto and Ivan Babrou
+- Unset highest bit of traceID in probabilistic sampler ([#490](https://github.com/jaegertracing/jaeger-client-go/pull/490)) -- Sokolov Yura
+
+2.22.1 (2020-01-16)
+-------------------
+
+- Increase UDP batch overhead to account for data loss metrics ([#488](https://github.com/jaegertracing/jaeger-client-go/pull/488)) -- Yuri Shkuro
+
+
+2.22.0 (2020-01-15)
+-------------------
+
+- Report data loss stats to Jaeger backend ([#482](https://github.com/jaegertracing/jaeger-client-go/pull/482)) -- Yuri Shkuro
+- Add limit on log records per span ([#483](https://github.com/jaegertracing/jaeger-client-go/pull/483)) -- Sokolov Yura
+
+
+2.21.1 (2019-12-20)
+-------------------
+
+- Update version correctly.
+
+
+2.21.0 (2019-12-20)
+-------------------
+
+- Clarify reporting error logs ([#469](https://github.com/jaegertracing/jaeger-client-go/pull/469)) -- Yuri Shkuro
+- Do not strip leading zeros from trace IDs ([#472](https://github.com/jaegertracing/jaeger-client-go/pull/472)) -- Yuri Shkuro
+- Chore (docs): fixed a couple of typos ([#475](https://github.com/jaegertracing/jaeger-client-go/pull/475)) -- Marc Bramaud
+- Support custom HTTP headers when reporting spans over HTTP ([#479](https://github.com/jaegertracing/jaeger-client-go/pull/479)) -- Albert Teoh
+
+
+2.20.1 (2019-11-08)
+-------------------
+
+Minor patch via https://github.com/jaegertracing/jaeger-client-go/pull/468
+
+- Make `AdaptiveSamplerUpdater` usable with default values; Resolves #467
+- Create `OperationNameLateBinding` sampler option and config option
+- Make `SamplerOptions` var of public type, so that its functions are discoverable via godoc
+
+
+2.20.0 (2019-11-06)
+-------------------
+
+## New Features
+
+- Allow all in-process spans of a trace to share sampling state (#443) -- Prithvi Raj
+
+  Sampling state is shared between all spans of the trace that are still in memory.
+  This allows implementation of delayed sampling decisions (see below).
+
+- Support delayed sampling decisions (#449) -- Yuri Shkuro
+
+  This is a large structural change to how the samplers work.
+  It allows some samplers to be executed multiple times on different
+  span events (like setting a tag) and make a positive sampling decision
+  later in the span life cycle, or even based on children spans.
+  See [README](./README.md#delayed-sampling) for more details.
+
+  There is a related minor change in behavior of the adaptive (per-operation) sampler,
+  which will no longer re-sample the trace when `span.SetOperation()` is called, i.e. the
+  operation used to make the sampling decision is always the one provided at span creation.
+
+- Add experimental tag matching sampler (#452) -- Yuri Shkuro
+
+  A sampler that can sample a trace based on a certain tag added to the root
+  span or one of its local (in-process) children. The sampler can be used with
+  another experimental `PrioritySampler` that allows multiple samplers to try
+  to make a sampling decision, in a certain priority order.
+
+- [log/zap] Report whether a trace was sampled (#445) -- Abhinav Gupta
+- Allow config.FromEnv() to enrich an existing config object (#436) -- Vineeth Reddy
+
+## Minor patches
+
+- Expose Sampler on Tracer and accept sampler options via Configuration (#460) -- Yuri Shkuro
+- Fix github.com/uber-go/atomic import (#464) -- Yuri Shkuro
+- Add nodejs to crossdock tests (#441) -- Bhavin Gandhi
+- Bump Go compiler version to 1.13 (#453) -- Yuri Shkuro
+
+2.19.0 (2019-09-23)
+-------------------
+
+- Upgrade jaeger-lib to 2.2 and unpin Prom client (#434) -- Yuri Shkuro
+
+
+2.18.1 (2019-09-16)
+-------------------
+
+- Remove go.mod / go.sum that interfere with `go get` (#432)
+
+
+2.18.0 (2019-09-09)
+-------------------
+
+- Add option "noDebugFlagOnForcedSampling" for tracer initialization [resolves #422] (#423) <Jun Guo>
+
+
+2.17.0 (2019-08-30)
+-------------------
+
+- Add a flag for firehose mode (#419) <Prithvi Raj>
+- Default sampling server URL to agent (#414) <Bryan Boreham>
+- Update default sampling rate when sampling strategy is refreshed (#413) <Bryan Boreham>
+- Support "Self" Span Reference (#411) <dm03514>
+- Don't complain about blank service name if tracing is Disabled (#410) Yuri <Shkuro>
+- Use IP address from tag if exist (#402) <NikoKVCS>
+- Expose span data to custom reporters [fixes #394] (#399) <Curtis Allen>
+- Fix the span allocation in the pool (#381) <Dmitry Ponomarev>
+
+
+2.16.0 (2019-03-24)
+-------------------
+
+- Add baggage to B3 codec (#319) <Pavol Loffay>
+- Add support for 128bit trace ids to zipkin thrift spans. (#378) <Douglas Reid>
+- Update zipkin propagation logic to support 128bit traceIDs (#373) <Douglas Reid>
+- Accept "true" for the x-b3-sampled header (#356) <Adrian Bogatu>
+
+- Allow setting of PoolSpans from Config object (#322) <Matthew Pound>
+- Make propagators public to allow wrapping (#379) <Ivan Babrou>
+- Change default metric namespace to use relevant separator for the metric backend (#364) <Gary Brown>
+- Change metrics prefix to jaeger_tracer and add descriptions (#346) <Gary Brown>
+- Bump OpenTracing to ^1.1.x (#383) <Yuri Shkuro>
+- Upgrade jaeger-lib to v2.0.0 (#359) <Gary Brown>
+- Avoid defer when generating random number (#358) <Gary Brown>
+- Use a pool of rand.Source to reduce lock contention when creating span ids (#357) <Gary Brown>
+- Make JAEGER_ENDPOINT take priority over JAEGER_AGENT_XXX (#342) <Eundoo Song>
+
+
+2.15.0 (2018-10-10)
+-------------------
+
+- Fix FollowsFrom spans ignoring baggage/debug header from dummy parent context (#313) <Zvi Cahana>
+- Make maximum annotation length configurable in tracer options (#318) <Eric Chang>
+- Support more environment variables in configuration (#323) <Daneyon Hansen>
+- Print error on Sampler Query failure (#328) <Goutham Veeramachaneni>
+- Add an HTTPOption to support custom http.RoundTripper (#333) <Michael Puncel>
+- Return an error when an HTTP error code is seen in zipkin HTTP transport (#331) <Michael Puncel>
+
+
+2.14.0 (2018-04-30)
+-------------------
+
+- Support throttling for debug traces (#274) <Isaac Hier>
+- Remove dependency on Apache Thrift (#303) <Yuri Shkuro>
+- Remove dependency on tchannel  (#295) (#294) <Yuri Shkuro>
+- Test with Go 1.9 (#298) <Yuri Shkuro>
+
+
+2.13.0 (2018-04-15)
+-------------------
+
+- Use value receiver for config.NewTracer() (#283) <Yuri Shkuro>
+- Lock span during jaeger thrift conversion (#273) <Won Jun Jang>
+- Fix the RemotelyControlledSampler so that it terminates go-routine on Close() (#260) <Scott Kidder> <Yuri Shkuro>
+- Added support for client configuration via env vars (#275) <Juraci Paixão Kröhling>
+- Allow overriding sampler in the Config (#270) <Mike Kabischev>
+
+
+2.12.0 (2018-03-14)
+-------------------
+
+- Use lock when retrieving span.Context() (#268)
+- Add Configuration support for custom Injector and Extractor (#263) <Martin Liu>
+
+
+2.11.2 (2018-01-12)
+-------------------
+
+- Add Gopkg.toml to allow using the lib with `dep`
+
+
+2.11.1 (2018-01-03)
+-------------------
+
+- Do not enqueue spans after Reporter is closed (#235, #245)
+- Change default flush interval to 1sec (#243)
+
+
+2.11.0 (2017-11-27)
+-------------------
+
+- Normalize metric names and tags to be compatible with Prometheus (#222)
+
+
+2.10.0 (2017-11-14)
+-------------------
+
+- Support custom tracing headers (#176)
+- Add BaggageRestrictionManager (#178) and RemoteBaggageRestrictionManager (#182)
+- Do not coerce baggage keys to lower case (#196)
+- Log span name when span cannot be reported (#198)
+- Add option to enable gen128Bit for tracer (#193) and allow custom generator for high bits of trace ID (#219)
+
+
+2.9.0 (2017-07-29)
+------------------
+
+- Pin thrift <= 0.10 (#179)
+- Introduce a parallel interface ContribObserver (#159)
+
+
+2.8.0 (2017-07-05)
+------------------
+
+- Drop `jaeger.` prefix from `jaeger.hostname` process-level tag
+- Add options to set tracer tags
+
+
+2.7.0 (2017-06-21)
+------------------
+
+- Fix rate limiter balance [#135](https://github.com/uber/jaeger-client-go/pull/135) [#140](https://github.com/uber/jaeger-client-go/pull/140)
+- Default client to send Jaeger.thrift [#147](https://github.com/uber/jaeger-client-go/pull/147)
+- Save baggage in span [#153](https://github.com/uber/jaeger-client-go/pull/153)
+- Move reporter.queueLength to the top of the struct to guarantee 64bit alignment [#158](https://github.com/uber/jaeger-client-go/pull/158)
+- Support HTTP transport with jaeger.thrift [#161](https://github.com/uber/jaeger-client-go/pull/161)
+
+
+2.6.0 (2017-03-28)
+------------------
+
+- Add config option to initialize RPC Metrics feature
+
+
+2.5.0 (2017-03-23)
+------------------
+
+- Split request latency metric by success/failure [#123](https://github.com/uber/jaeger-client-go/pull/123)
+- Add mutex to adaptive sampler and fix race condition [#124](https://github.com/uber/jaeger-client-go/pull/124)
+- Fix rate limiter panic [#125](https://github.com/uber/jaeger-client-go/pull/125)
+
+
+2.4.0 (2017-03-21)
+------------------
+
+- Remove `_ms` suffix from request latency metric name [#121](https://github.com/uber/jaeger-client-go/pull/121)
+- Rename all metrics to "request" and "http_request" and use tags for other dimensions [#121](https://github.com/uber/jaeger-client-go/pull/121)
+
+
+2.3.0 (2017-03-20)
+------------------
+
+- Make Span type public to allow access to non-std methods for testing [#117](https://github.com/uber/jaeger-client-go/pull/117)
+- Add a structured way to extract traces for logging with zap [#118](https://github.com/uber/jaeger-client-go/pull/118)
+
+
+2.2.1 (2017-03-14)
+------------------
+
+- Fix panic caused by updating the remote sampler from adaptive sampler to any other sampler type (https://github.com/uber/jaeger-client-go/pull/111)
+
+
+2.2.0 (2017-03-10)
+------------------
+
+- Introduce Observer and SpanObserver (https://github.com/uber/jaeger-client-go/pull/94)
+- Add RPC metrics emitter as Observer/SpanObserver (https://github.com/uber/jaeger-client-go/pull/103)
+
+
+2.1.2 (2017-02-27)
+-------------------
+
+- Fix leaky bucket bug (https://github.com/uber/jaeger-client-go/pull/99)
+- Fix zap logger Infof (https://github.com/uber/jaeger-client-go/pull/100)
+- Add tracer initialization godoc examples
+
+
+2.1.1 (2017-02-21)
+-------------------
+
+- Fix inefficient usage of zap.Logger
+
+
+2.1.0 (2017-02-17)
+-------------------
+
+- Add adapter for zap.Logger (https://github.com/uber-go/zap)
+- Move logging API to ./log/ package
+
+
+2.0.0 (2017-02-08)
+-------------------
+
+- Support Adaptive Sampling
+- Support 128bit Trace IDs
+- Change trace/span IDs from uint64 to strong types TraceID and SpanID
+- Add Zipkin HTTP B3 Propagation format support #72
+- Rip out existing metrics and use github.com/uber/jaeger-lib/metrics
+- Change API for tracer, reporter, sampler initialization
+
+
+1.6.0 (2016-10-14)
+-------------------
+
+- Add Zipkin HTTP transport
+- Support external baggage via jaeger-baggage header
+- Unpin Thrift version, keep to master
+
+
+1.5.1 (2016-09-27)
+-------------------
+
+- Relax dependency on opentracing to ^1
+
+
+1.5.0 (2016-09-27)
+-------------------
+
+- Upgrade to opentracing-go 1.0
+- Support KV logging for Spans
+
+
+1.4.0 (2016-09-14)
+-------------------
+
+- Support debug traces via HTTP header "jaeger-debug-id"
diff --git a/vendor/github.com/uber/jaeger-client-go/CODEOWNERS b/vendor/github.com/uber/jaeger-client-go/CODEOWNERS
new file mode 100644
index 0000000..0572efc
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/CODEOWNERS
@@ -0,0 +1,2 @@
+
+* @jaegertracing/jaeger-maintainers
diff --git a/vendor/github.com/uber/jaeger-client-go/CONTRIBUTING.md b/vendor/github.com/uber/jaeger-client-go/CONTRIBUTING.md
new file mode 100644
index 0000000..41e2154
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/CONTRIBUTING.md
@@ -0,0 +1,170 @@
+# How to Contribute to Jaeger
+
+We'd love your help!
+
+Jaeger is [Apache 2.0 licensed](LICENSE) and accepts contributions via GitHub
+pull requests. This document outlines some of the conventions on development
+workflow, commit message formatting, contact points and other resources to make
+it easier to get your contribution accepted.
+
+We gratefully welcome improvements to documentation as well as to code.
+
+# Certificate of Origin
+
+By contributing to this project you agree to the [Developer Certificate of
+Origin](https://developercertificate.org/) (DCO). This document was created
+by the Linux Kernel community and is a simple statement that you, as a
+contributor, have the legal right to make the contribution. See the [DCO](DCO)
+file for details.
+
+## Getting Started
+
+This library uses [dep](https://golang.github.io/dep/) to manage dependencies.
+
+To get started, make sure you clone the Git repository into the correct location
+`github.com/uber/jaeger-client-go` relative to `$GOPATH`:
+
+```
+mkdir -p $GOPATH/src/github.com/uber
+cd $GOPATH/src/github.com/uber
+git clone git@github.com:jaegertracing/jaeger-client-go.git jaeger-client-go
+cd jaeger-client-go
+git submodule update --init --recursive
+```
+
+Then install dependencies and run the tests:
+
+```
+make install
+make test
+```
+
+## Imports grouping
+
+This projects follows the following pattern for grouping imports in Go files:
+  * imports from standard library
+  * imports from other projects
+  * imports from `jaeger-client-go` project
+
+For example:
+
+```go
+import (
+	"fmt"
+
+	"github.com/uber/jaeger-lib/metrics"
+	"go.uber.org/zap"
+
+	"github.com/uber/jaeger-client-go/config"
+)
+```
+
+## Making A Change
+
+*Before making any significant changes, please [open an
+issue](https://github.com/jaegertracing/jaeger-client-go/issues).* Discussing your proposed
+changes ahead of time will make the contribution process smooth for everyone.
+
+Once we've discussed your changes and you've got your code ready, make sure
+that tests are passing (`make test` or `make cover`) and open your PR. Your
+pull request is most likely to be accepted if it:
+
+* Includes tests for new functionality.
+* Follows the guidelines in [Effective
+  Go](https://golang.org/doc/effective_go.html) and the [Go team's common code
+  review comments](https://github.com/golang/go/wiki/CodeReviewComments).
+* Has a [good commit message](https://chris.beams.io/posts/git-commit/):
+   * Separate subject from body with a blank line
+   * Limit the subject line to 50 characters
+   * Capitalize the subject line
+   * Do not end the subject line with a period
+   * Use the imperative mood in the subject line
+   * Wrap the body at 72 characters
+   * Use the body to explain _what_ and _why_ instead of _how_
+* Each commit must be signed by the author ([see below](#sign-your-work)).
+
+## License
+
+By contributing your code, you agree to license your contribution under the terms
+of the [Apache License](LICENSE).
+
+If you are adding a new file it should have a header like below.  The easiest
+way to add such header is to run `make fmt`.
+
+```
+// Copyright (c) 2017 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+```
+
+## Sign your work
+
+The sign-off is a simple line at the end of the explanation for the
+patch, which certifies that you wrote it or otherwise have the right to
+pass it on as an open-source patch.  The rules are pretty simple: if you
+can certify the below (from
+[developercertificate.org](http://developercertificate.org/)):
+
+```
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+```
+
+then you just add a line to every git commit message:
+
+    Signed-off-by: Joe Smith <joe@gmail.com>
+
+using your real name (sorry, no pseudonyms or anonymous contributions.)
+
+You can add the sign off when creating the git commit via `git commit -s`.
+
+If you want this to be automatic you can set up some aliases:
+
+```
+git config --add alias.amend "commit -s --amend"
+git config --add alias.c "commit -s"
+```
diff --git a/vendor/github.com/uber/jaeger-client-go/DCO b/vendor/github.com/uber/jaeger-client-go/DCO
new file mode 100644
index 0000000..068953d
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/DCO
@@ -0,0 +1,37 @@
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+
diff --git a/vendor/github.com/uber/jaeger-client-go/Gopkg.lock b/vendor/github.com/uber/jaeger-client-go/Gopkg.lock
new file mode 100644
index 0000000..268289b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/Gopkg.lock
@@ -0,0 +1,301 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  digest = "1:4c4c33075b704791d6a7f09dfb55c66769e8a1dc6adf87026292d274fe8ad113"
+  name = "github.com/HdrHistogram/hdrhistogram-go"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "3a0bb77429bd3a61596f5e8a3172445844342120"
+  version = "0.9.0"
+
+[[projects]]
+  digest = "1:d6afaeed1502aa28e80a4ed0981d570ad91b2579193404256ce672ed0a609e0d"
+  name = "github.com/beorn7/perks"
+  packages = ["quantile"]
+  pruneopts = "UT"
+  revision = "37c8de3658fcb183f997c4e13e8337516ab753e6"
+  version = "v1.0.1"
+
+[[projects]]
+  branch = "master"
+  digest = "1:a382acd6150713655ded76ab5fbcbc7924a7808dab4312dda5d1f23dd8ce5277"
+  name = "github.com/crossdock/crossdock-go"
+  packages = [
+    ".",
+    "assert",
+    "require",
+  ]
+  pruneopts = "UT"
+  revision = "049aabb0122b03bc9bd30cab8f3f91fb60166361"
+
+[[projects]]
+  digest = "1:ffe9824d294da03b391f44e1ae8281281b4afc1bdaa9588c9097785e3af10cec"
+  name = "github.com/davecgh/go-spew"
+  packages = ["spew"]
+  pruneopts = "UT"
+  revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73"
+  version = "v1.1.1"
+
+[[projects]]
+  digest = "1:7ae311278f7ccaa724de8f2cdec0a507ba3ee6dea8c77237e8157bcf64b0f28b"
+  name = "github.com/golang/mock"
+  packages = ["gomock"]
+  pruneopts = "UT"
+  revision = "f7b1909c82a8958747e5c87c6a5c3b2eaed8a33d"
+  version = "v1.4.4"
+
+[[projects]]
+  digest = "1:4a32eb57407190eced21a21abee9ce4d4ab6f0bf113ca61cb1cb2d549a65c985"
+  name = "github.com/golang/protobuf"
+  packages = [
+    "proto",
+    "ptypes",
+    "ptypes/any",
+    "ptypes/duration",
+    "ptypes/timestamp",
+  ]
+  pruneopts = "UT"
+  revision = "d04d7b157bb510b1e0c10132224b616ac0e26b17"
+  version = "v1.4.2"
+
+[[projects]]
+  digest = "1:ff5ebae34cfbf047d505ee150de27e60570e8c394b3b8fdbb720ff6ac71985fc"
+  name = "github.com/matttproud/golang_protobuf_extensions"
+  packages = ["pbutil"]
+  pruneopts = "UT"
+  revision = "c12348ce28de40eed0136aa2b644d0ee0650e56c"
+  version = "v1.0.1"
+
+[[projects]]
+  digest = "1:fe5217d44ae8fb84f711968816fe50077cea9dfa8f44425b8e44e7e3de896d01"
+  name = "github.com/opentracing/opentracing-go"
+  packages = [
+    ".",
+    "ext",
+    "harness",
+    "log",
+  ]
+  pruneopts = "UT"
+  revision = "d34af3eaa63c4d08ab54863a4bdd0daa45212e12"
+  version = "v1.2.0"
+
+[[projects]]
+  digest = "1:9e1d37b58d17113ec3cb5608ac0382313c5b59470b94ed97d0976e69c7022314"
+  name = "github.com/pkg/errors"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "614d223910a179a466c1767a985424175c39b465"
+  version = "v0.9.1"
+
+[[projects]]
+  digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe"
+  name = "github.com/pmezard/go-difflib"
+  packages = ["difflib"]
+  pruneopts = "UT"
+  revision = "792786c7400a136282c1664665ae0a8db921c6c2"
+  version = "v1.0.0"
+
+[[projects]]
+  digest = "1:7097829edd12fd7211fca0d29496b44f94ef9e6d72f88fb64f3d7b06315818ad"
+  name = "github.com/prometheus/client_golang"
+  packages = [
+    "prometheus",
+    "prometheus/internal",
+  ]
+  pruneopts = "UT"
+  revision = "170205fb58decfd011f1550d4cfb737230d7ae4f"
+  version = "v1.1.0"
+
+[[projects]]
+  digest = "1:0db23933b8052702d980a3f029149b3f175f7c0eea0cff85b175017d0f2722c0"
+  name = "github.com/prometheus/client_model"
+  packages = ["go"]
+  pruneopts = "UT"
+  revision = "7bc5445566f0fe75b15de23e6b93886e982d7bf9"
+  version = "v0.2.0"
+
+[[projects]]
+  digest = "1:4407525bde4e6ad9c1f60113d38cbb255d769e0ea506c8cf877db39da7753b3a"
+  name = "github.com/prometheus/common"
+  packages = [
+    "expfmt",
+    "internal/bitbucket.org/ww/goautoneg",
+    "model",
+  ]
+  pruneopts = "UT"
+  revision = "317b7b125e8fddda956d0c9574e5f03f438ed5bc"
+  version = "v0.14.0"
+
+[[projects]]
+  digest = "1:b2268435af85ee1a0fca0e37de4225f78e2d9d8b0b66acde3a29f127634efa87"
+  name = "github.com/prometheus/procfs"
+  packages = [
+    ".",
+    "internal/fs",
+    "internal/util",
+  ]
+  pruneopts = "UT"
+  revision = "9dece15c53cd5e9fbfbd72d5108adcf526a3f486"
+  version = "v0.2.0"
+
+[[projects]]
+  digest = "1:86ff4af7b6bb3d27c2e89b5ef8c139678acff1cad74a3c5235fc5af6b94fcc9e"
+  name = "github.com/stretchr/objx"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "35313a95ee26395aa17d366c71a2ccf788fa69b6"
+  version = "v0.3.0"
+
+[[projects]]
+  digest = "1:5201127841a78d84d0ca68a2e564c08e3882c0fb9321a75997ce87926e0d63ea"
+  name = "github.com/stretchr/testify"
+  packages = [
+    "assert",
+    "mock",
+    "require",
+    "suite",
+  ]
+  pruneopts = "UT"
+  revision = "f654a9112bbeac49ca2cd45bfbe11533c4666cf8"
+  version = "v1.6.1"
+
+[[projects]]
+  digest = "1:4af46f2faea30e52c96ec9ec32bb654d2729579a80d242b0acfa193ad321eb61"
+  name = "github.com/uber/jaeger-lib"
+  packages = [
+    "metrics",
+    "metrics/metricstest",
+    "metrics/prometheus",
+  ]
+  pruneopts = "UT"
+  revision = "48cc1df63e6be0d63b95677f0d22beb880bce1e4"
+  version = "v2.3.0"
+
+[[projects]]
+  digest = "1:7a3de4371d6b68c6f37a0df2c09905664d9de59026c91cbe275aae55f4fe760f"
+  name = "go.uber.org/atomic"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "12f27ba2637fa0e13772a4f05fa46a5d18d53182"
+  version = "v1.7.0"
+
+[[projects]]
+  digest = "1:e9eeeabfd025a5e69b9c8e2857d3517ea67e747ae913bcb0a9e1e7bafdb9c298"
+  name = "go.uber.org/multierr"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "3114a8b704d2d28dbacda34a872690aaef66aeed"
+  version = "v1.6.0"
+
+[[projects]]
+  digest = "1:0398f5f0e2e9233f25fad702f3b323241daf9f876cc869ab259238cf1bced236"
+  name = "go.uber.org/zap"
+  packages = [
+    ".",
+    "buffer",
+    "internal/bufferpool",
+    "internal/color",
+    "internal/exit",
+    "zapcore",
+    "zaptest/observer",
+  ]
+  pruneopts = "UT"
+  revision = "404189cf44aea95b0cd9bddcb0242dd4cf88c510"
+  version = "v1.16.0"
+
+[[projects]]
+  branch = "master"
+  digest = "1:f8b491a7c25030a895a0e579742d07136e6958e77ef2d46e769db8eec4e58fcd"
+  name = "golang.org/x/net"
+  packages = [
+    "context",
+    "context/ctxhttp",
+  ]
+  pruneopts = "UT"
+  revision = "328152dc79b1547da63f950cd4cdd9afd50b2774"
+
+[[projects]]
+  branch = "master"
+  digest = "1:1e581fa394685ef0d84008ae04cf3414390c1a700c04846853869cb4ac2fec86"
+  name = "golang.org/x/sys"
+  packages = [
+    "internal/unsafeheader",
+    "unix",
+    "windows",
+  ]
+  pruneopts = "UT"
+  revision = "d9f96fdee20d1e5115ee34ba4016eae6cfb66eb9"
+
+[[projects]]
+  digest = "1:fd328c5b52e433ea3ffc891bcc4f94469a82bf478558208db2b386aad8a304a1"
+  name = "google.golang.org/protobuf"
+  packages = [
+    "encoding/prototext",
+    "encoding/protowire",
+    "internal/descfmt",
+    "internal/descopts",
+    "internal/detrand",
+    "internal/encoding/defval",
+    "internal/encoding/messageset",
+    "internal/encoding/tag",
+    "internal/encoding/text",
+    "internal/errors",
+    "internal/fieldsort",
+    "internal/filedesc",
+    "internal/filetype",
+    "internal/flags",
+    "internal/genid",
+    "internal/impl",
+    "internal/mapsort",
+    "internal/pragma",
+    "internal/set",
+    "internal/strs",
+    "internal/version",
+    "proto",
+    "reflect/protoreflect",
+    "reflect/protoregistry",
+    "runtime/protoiface",
+    "runtime/protoimpl",
+    "types/known/anypb",
+    "types/known/durationpb",
+    "types/known/timestamppb",
+  ]
+  pruneopts = "UT"
+  revision = "3f7a61f89bb6813f89d981d1870ed68da0b3c3f1"
+  version = "v1.25.0"
+
+[[projects]]
+  branch = "v3"
+  digest = "1:229cb0f6192914f518cc1241ede6d6f1f458b31debfa18bf3a5c9e4f7b01e24b"
+  name = "gopkg.in/yaml.v3"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "eeeca48fe7764f320e4870d231902bf9c1be2c08"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  input-imports = [
+    "github.com/crossdock/crossdock-go",
+    "github.com/golang/mock/gomock",
+    "github.com/opentracing/opentracing-go",
+    "github.com/opentracing/opentracing-go/ext",
+    "github.com/opentracing/opentracing-go/harness",
+    "github.com/opentracing/opentracing-go/log",
+    "github.com/pkg/errors",
+    "github.com/prometheus/client_golang/prometheus",
+    "github.com/stretchr/testify/assert",
+    "github.com/stretchr/testify/mock",
+    "github.com/stretchr/testify/require",
+    "github.com/stretchr/testify/suite",
+    "github.com/uber/jaeger-lib/metrics",
+    "github.com/uber/jaeger-lib/metrics/metricstest",
+    "github.com/uber/jaeger-lib/metrics/prometheus",
+    "go.uber.org/atomic",
+    "go.uber.org/zap",
+    "go.uber.org/zap/zapcore",
+    "go.uber.org/zap/zaptest/observer",
+  ]
+  solver-name = "gps-cdcl"
+  solver-version = 1
diff --git a/vendor/github.com/uber/jaeger-client-go/Gopkg.toml b/vendor/github.com/uber/jaeger-client-go/Gopkg.toml
new file mode 100644
index 0000000..3aa307a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/Gopkg.toml
@@ -0,0 +1,31 @@
+[[constraint]]
+  name = "github.com/crossdock/crossdock-go"
+  branch = "master"
+
+[[constraint]]
+  name = "github.com/opentracing/opentracing-go"
+  version = "^1.2"
+
+[[constraint]]
+  name = "github.com/prometheus/client_golang"
+  version = "^1"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "^1.1.3"
+
+[[constraint]]
+  name = "go.uber.org/atomic"
+  version = "^1"
+
+[[constraint]]
+  name = "github.com/uber/jaeger-lib"
+  version = "^2.3"
+
+[[constraint]]
+  name = "go.uber.org/zap"
+  version = "^1"
+
+[prune]
+  go-tests = true
+  unused-packages = true
diff --git a/vendor/github.com/uber/jaeger-client-go/LICENSE b/vendor/github.com/uber/jaeger-client-go/LICENSE
new file mode 100644
index 0000000..261eeb9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
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+      Notwithstanding the above, nothing herein shall supersede or modify
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+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
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+
+   Unless required by applicable law or agreed to in writing, software
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diff --git a/vendor/github.com/uber/jaeger-client-go/Makefile b/vendor/github.com/uber/jaeger-client-go/Makefile
new file mode 100644
index 0000000..bb7463c
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/Makefile
@@ -0,0 +1,149 @@
+PROJECT_ROOT=github.com/uber/jaeger-client-go
+export GO111MODULE=off
+PACKAGES := . $(shell GO111MODULE=off go list ./... | awk -F/ 'NR>1 {print "./"$$4"/..."}' | grep -v -e ./thrift-gen/... -e ./thrift/... | sort -u)
+# all .go files that don't exist in hidden directories
+ALL_SRC := $(shell find . -name "*.go" | grep -v -e vendor -e thrift-gen -e ./thrift/ \
+        -e ".*/\..*" \
+        -e ".*/_.*" \
+        -e ".*/mocks.*")
+
+USE_DEP := true
+
+-include crossdock/rules.mk
+
+RACE=-race
+GOTEST=go test -v $(RACE)
+GOLINT=golint
+GOVET=go vet
+GOFMT=gofmt
+FMT_LOG=fmt.log
+LINT_LOG=lint.log
+
+THRIFT_VER=0.14
+THRIFT_IMG=jaegertracing/thrift:$(THRIFT_VER)
+THRIFT=docker run -v "${PWD}:/data" $(THRIFT_IMG) thrift
+THRIFT_GO_ARGS=thrift_import="github.com/apache/thrift/lib/go/thrift"
+THRIFT_GEN_DIR=thrift-gen
+
+PASS=$(shell printf "\033[32mPASS\033[0m")
+FAIL=$(shell printf "\033[31mFAIL\033[0m")
+COLORIZE=sed ''/PASS/s//$(PASS)/'' | sed ''/FAIL/s//$(FAIL)/''
+
+.DEFAULT_GOAL := test-and-lint
+
+.PHONY: test-and-lint
+test-and-lint: test fmt lint
+
+.PHONY: test
+test:
+ifeq ($(USE_DEP),true)
+	dep check
+endif
+	bash -c "set -e; set -o pipefail; $(GOTEST) $(PACKAGES) | $(COLORIZE)"
+
+.PHONY: fmt
+fmt:
+	$(GOFMT) -e -s -l -w $(ALL_SRC)
+	./scripts/updateLicenses.sh
+
+.PHONY: lint
+lint: vet golint lint-fmt lint-thrift-testing
+
+.PHONY: vet
+vet:
+	$(GOVET) $(PACKAGES)
+
+.PHONY: golint
+golint:
+	@cat /dev/null > $(LINT_LOG)
+	@$(foreach pkg, $(PACKAGES), $(GOLINT) $(pkg) | grep -v crossdock/thrift >> $(LINT_LOG) || true;)
+	@[ ! -s "$(LINT_LOG)" ] || (echo "Lint Failures" | cat - $(LINT_LOG) && false)
+
+.PHONY: lint-fmt
+lint-fmt:
+	@$(GOFMT) -e -s -l $(ALL_SRC) > $(FMT_LOG)
+	./scripts/updateLicenses.sh >> $(FMT_LOG)
+	@[ ! -s "$(FMT_LOG)" ] || (echo "go fmt or license check failures, run 'make fmt'" | cat - $(FMT_LOG) && false)
+
+# make sure thrift/ module does not import "testing"
+.PHONY: lint-thrift-testing
+lint-thrift-testing:
+	@cat /dev/null > $(LINT_LOG)
+	@(grep -rn '"testing"' thrift | grep -v README.md > $(LINT_LOG)) || true
+	@[ ! -s "$(LINT_LOG)" ] || (echo '"thrift" module must not import "testing", see issue #585' | cat - $(LINT_LOG) && false)
+
+.PHONY: install
+install:
+	@echo install: USE_DEP=$(USE_DEP) USE_GLIDE=$(USE_GLIDE)
+ifeq ($(USE_DEP),true)
+	dep version || make install-dep
+	dep ensure -vendor-only -v
+endif
+ifeq ($(USE_GLIDE),true)
+	glide --version || go get github.com/Masterminds/glide
+	glide install
+endif
+
+
+.PHONY: cover
+cover:
+	$(GOTEST) -cover -coverprofile cover.out $(PACKAGES)
+
+.PHONY: cover-html
+cover-html: cover
+	go tool cover -html=cover.out -o cover.html
+
+# This is not part of the regular test target because we don't want to slow it
+# down.
+.PHONY: test-examples
+test-examples:
+	make -C examples
+
+.PHONY: thrift
+thrift: idl-submodule thrift-compile
+
+# TODO at the moment we're not generating tchan_*.go files
+.PHONY: thrift-compile
+thrift-compile: thrift-image
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/agent.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/sampling.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/jaeger.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/zipkincore.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/$(THRIFT_GEN_DIR) /data/idl/thrift/baggage.thrift
+	$(THRIFT) -o /data --gen go:$(THRIFT_GO_ARGS) --out /data/crossdock/thrift/ /data/idl/thrift/crossdock/tracetest.thrift
+	sed -i '' 's|"zipkincore"|"$(PROJECT_ROOT)/thrift-gen/zipkincore"|g' $(THRIFT_GEN_DIR)/agent/*.go
+	sed -i '' 's|"jaeger"|"$(PROJECT_ROOT)/thrift-gen/jaeger"|g' $(THRIFT_GEN_DIR)/agent/*.go
+	sed -i '' 's|"github.com/apache/thrift/lib/go/thrift"|"github.com/uber/jaeger-client-go/thrift"|g' \
+		$(THRIFT_GEN_DIR)/*/*.go crossdock/thrift/tracetest/*.go
+	rm -rf thrift-gen/*/*-remote
+	rm -rf crossdock/thrift/*/*-remote
+	rm -rf thrift-gen/jaeger/collector.go
+
+.PHONY: idl-submodule
+idl-submodule:
+	git submodule init
+	git submodule update
+
+.PHONY: thrift-image
+thrift-image:
+	$(THRIFT) -version
+
+.PHONY: install-dep
+install-dep:
+	- curl -L -s https://github.com/golang/dep/releases/download/v0.5.0/dep-linux-amd64 -o $$GOPATH/bin/dep
+	- chmod +x $$GOPATH/bin/dep
+
+.PHONY: install-ci
+install-ci: install
+	go get github.com/wadey/gocovmerge
+	go get github.com/mattn/goveralls
+	go get golang.org/x/tools/cmd/cover
+	go get golang.org/x/lint/golint
+
+.PHONY: test-ci
+test-ci: cover
+ifeq ($(CI_SKIP_LINT),true)
+	echo 'skipping lint'
+else
+	make lint
+endif
diff --git a/vendor/github.com/uber/jaeger-client-go/README.md b/vendor/github.com/uber/jaeger-client-go/README.md
new file mode 100644
index 0000000..687f578
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/README.md
@@ -0,0 +1,324 @@
+[![GoDoc][doc-img]][doc] [![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov] [![OpenTracing 1.0 Enabled][ot-img]][ot-url]
+
+# Jaeger Bindings for Go OpenTracing API
+
+Instrumentation library that implements an
+[OpenTracing Go](https://github.com/opentracing/opentracing-go) Tracer for Jaeger (https://jaegertracing.io).
+
+**IMPORTANT**: The library's import path is based on its original location under `github.com/uber`. Do not try to import it as `github.com/jaegertracing`, it will not compile. We might revisit this in the next major release.
+  * :white_check_mark: `import "github.com/uber/jaeger-client-go"`
+  * :x: `import "github.com/jaegertracing/jaeger-client-go"`
+
+## How to Contribute
+
+Please see [CONTRIBUTING.md](CONTRIBUTING.md).
+
+## Installation
+
+We recommended using a dependency manager like [dep](https://golang.github.io/dep/)
+and [semantic versioning](http://semver.org/) when including this library into an application.
+For example, Jaeger backend imports this library like this:
+
+```toml
+[[constraint]]
+  name = "github.com/uber/jaeger-client-go"
+  version = "2.17"
+```
+
+If you instead want to use the latest version in `master`, you can pull it via `go get`.
+Note that during `go get` you may see build errors due to incompatible dependencies, which is why
+we recommend using semantic versions for dependencies.  The error  may be fixed by running
+`make install` (it will install `dep` if you don't have it):
+
+```shell
+go get -u github.com/uber/jaeger-client-go/
+cd $GOPATH/src/github.com/uber/jaeger-client-go/
+git submodule update --init --recursive
+make install
+```
+
+## Initialization
+
+See tracer initialization examples in [godoc](https://godoc.org/github.com/uber/jaeger-client-go/config#pkg-examples)
+and [config/example_test.go](./config/example_test.go).
+
+### Environment variables
+
+The tracer can be initialized with values coming from environment variables, if it is
+[built from a config](https://pkg.go.dev/github.com/uber/jaeger-client-go/config?tab=doc#Configuration.NewTracer)
+that was created via [FromEnv()](https://pkg.go.dev/github.com/uber/jaeger-client-go/config?tab=doc#FromEnv).
+None of the env vars are required and all of them can be overridden via direct setting 
+of the property on the configuration object.
+
+Property| Description
+--- | ---
+JAEGER_SERVICE_NAME | The service name.
+JAEGER_AGENT_HOST | The hostname for communicating with agent via UDP (default `localhost`).
+JAEGER_AGENT_PORT | The port for communicating with agent via UDP (default `6831`).
+JAEGER_ENDPOINT | The HTTP endpoint for sending spans directly to a collector, i.e. http://jaeger-collector:14268/api/traces. If specified, the agent host/port are ignored.
+JAEGER_USER | Username to send as part of "Basic" authentication to the collector endpoint.
+JAEGER_PASSWORD | Password to send as part of "Basic" authentication to the collector endpoint.
+JAEGER_REPORTER_LOG_SPANS | Whether the reporter should also log the spans" `true` or `false` (default `false`).
+JAEGER_REPORTER_MAX_QUEUE_SIZE | The reporter's maximum queue size (default `100`).
+JAEGER_REPORTER_FLUSH_INTERVAL | The reporter's flush interval, with units, e.g. `500ms` or `2s` ([valid units][timeunits]; default `1s`).
+JAEGER_REPORTER_ATTEMPT_RECONNECTING_DISABLED | When true, disables udp connection helper that periodically re-resolves the agent's hostname and reconnects if there was a change (default `false`).
+JAEGER_REPORTER_ATTEMPT_RECONNECT_INTERVAL | Controls how often the agent client re-resolves the provided hostname in order to detect address changes ([valid units][timeunits]; default `30s`).
+JAEGER_SAMPLER_TYPE | The sampler type: `remote`, `const`, `probabilistic`, `ratelimiting` (default `remote`). See also https://www.jaegertracing.io/docs/latest/sampling/.
+JAEGER_SAMPLER_PARAM | The sampler parameter (number).
+JAEGER_SAMPLER_MANAGER_HOST_PORT | (deprecated) The HTTP endpoint when using the `remote` sampler.
+JAEGER_SAMPLING_ENDPOINT | The URL for the sampling configuration server when using sampler type `remote` (default `http://127.0.0.1:5778/sampling`).
+JAEGER_SAMPLER_MAX_OPERATIONS | The maximum number of operations that the sampler will keep track of (default `2000`).
+JAEGER_SAMPLER_REFRESH_INTERVAL | How often the `remote` sampler should poll the configuration server for the appropriate sampling strategy, e.g. "1m" or "30s" ([valid units][timeunits]; default `1m`).
+JAEGER_TAGS | A comma separated list of `name=value` tracer-level tags, which get added to all reported spans. The value can also refer to an environment variable using the format `${envVarName:defaultValue}`.
+JAEGER_DISABLED | Whether the tracer is disabled or not. If `true`, the `opentracing.NoopTracer` is used (default `false`).
+JAEGER_RPC_METRICS | Whether to store RPC metrics, `true` or `false` (default `false`).
+
+By default, the client sends traces via UDP to the agent at `localhost:6831`. Use `JAEGER_AGENT_HOST` and
+`JAEGER_AGENT_PORT` to send UDP traces to a different `host:port`. If `JAEGER_ENDPOINT` is set, the client sends traces
+to the endpoint via `HTTP`, making the `JAEGER_AGENT_HOST` and `JAEGER_AGENT_PORT` unused. If `JAEGER_ENDPOINT` is
+secured, HTTP basic authentication can be performed by setting the `JAEGER_USER` and `JAEGER_PASSWORD` environment
+variables.
+
+### Closing the tracer via `io.Closer`
+
+The constructor function for Jaeger Tracer returns the tracer itself and an `io.Closer` instance.
+It is recommended to structure your `main()` so that it calls the `Close()` function on the closer
+before exiting, e.g.
+
+```go
+tracer, closer, err := cfg.NewTracer(...)
+defer closer.Close()
+```
+
+This is especially useful for command-line tools that enable tracing, as well as
+for the long-running apps that support graceful shutdown. For example, if your deployment
+system sends SIGTERM instead of killing the process and you trap that signal to do a graceful
+exit, then having `defer closer.Close()` ensures that all buffered spans are flushed.
+
+### Metrics & Monitoring
+
+The tracer emits a number of different metrics, defined in
+[metrics.go](metrics.go). The monitoring backend is expected to support
+tag-based metric names, e.g. instead of `statsd`-style string names
+like `counters.my-service.jaeger.spans.started.sampled`, the metrics
+are defined by a short name and a collection of key/value tags, for
+example: `name:jaeger.traces, state:started, sampled:y`. See [metrics.go](./metrics.go)
+file for the full list and descriptions of emitted metrics.
+
+The monitoring backend is represented by the `metrics.Factory` interface from package
+[`"github.com/uber/jaeger-lib/metrics"`](https://github.com/jaegertracing/jaeger-lib/tree/master/metrics).  An implementation
+of that interface can be passed as an option to either the Configuration object or the Tracer
+constructor, for example:
+
+```go
+import (
+    "github.com/uber/jaeger-client-go/config"
+    "github.com/uber/jaeger-lib/metrics/prometheus"
+)
+
+    metricsFactory := prometheus.New()
+    tracer, closer, err := config.Configuration{
+        ServiceName: "your-service-name",
+    }.NewTracer(
+        config.Metrics(metricsFactory),
+    )
+```
+
+By default, a no-op `metrics.NullFactory` is used.
+
+### Logging
+
+The tracer can be configured with an optional logger, which will be
+used to log communication errors, or log spans if a logging reporter
+option is specified in the configuration. The logging API is abstracted
+by the [Logger](logger.go) interface. A logger instance implementing
+this interface can be set on the `Config` object before calling the
+`New` method.
+
+Besides the [zap](https://github.com/uber-go/zap) implementation
+bundled with this package there is also a [go-kit](https://github.com/go-kit/kit)
+one in the [jaeger-lib](https://github.com/jaegertracing/jaeger-lib) repository.
+
+## Instrumentation for Tracing
+
+Since this tracer is fully compliant with OpenTracing API 1.0,
+all code instrumentation should only use the API itself, as described
+in the [opentracing-go](https://github.com/opentracing/opentracing-go) documentation.
+
+## Features
+
+### Reporters
+
+A "reporter" is a component that receives the finished spans and reports
+them to somewhere. Under normal circumstances, the Tracer
+should use the default `RemoteReporter`, which sends the spans out of
+process via configurable "transport". For testing purposes, one can
+use an `InMemoryReporter` that accumulates spans in a buffer and
+allows to retrieve them for later verification. Also available are
+`NullReporter`, a no-op reporter that does nothing, a `LoggingReporter`
+which logs all finished spans using their `String()` method, and a
+`CompositeReporter` that can be used to combine more than one reporter
+into one, e.g. to attach a logging reporter to the main remote reporter.
+
+### Span Reporting Transports
+
+The remote reporter uses "transports" to actually send the spans out
+of process. Currently the supported transports include:
+  * [Jaeger Thrift](https://github.com/jaegertracing/jaeger-idl/blob/master/thrift/agent.thrift) over UDP or HTTP,
+  * [Zipkin Thrift](https://github.com/jaegertracing/jaeger-idl/blob/master/thrift/zipkincore.thrift) over HTTP.
+
+### Sampling
+
+The tracer does not record all spans, but only those that have the
+sampling bit set in the `flags`. When a new trace is started and a new
+unique ID is generated, a sampling decision is made whether this trace
+should be sampled. The sampling decision is propagated to all downstream
+calls via the `flags` field of the trace context. The following samplers
+are available:
+  1. `RemotelyControlledSampler` uses one of the other simpler samplers
+     and periodically updates it by polling an external server. This
+     allows dynamic control of the sampling strategies.
+  1. `ConstSampler` always makes the same sampling decision for all
+     trace IDs. it can be configured to either sample all traces, or
+     to sample none.
+  1. `ProbabilisticSampler` uses a fixed sampling rate as a probability
+     for a given trace to be sampled. The actual decision is made by
+     comparing the trace ID with a random number multiplied by the
+     sampling rate.
+  1. `RateLimitingSampler` can be used to allow only a certain fixed
+     number of traces to be sampled per second.
+
+#### Delayed sampling
+
+Version 2.20 introduced the ability to delay sampling decisions in the life cycle
+of the root span. It involves several features and architectural changes:
+  * **Shared sampling state**: the sampling state is shared across all local
+    (i.e. in-process) spans for a given trace.
+  * **New `SamplerV2` API** allows the sampler to be called at multiple points 
+    in the life cycle of a span:
+    * on span creation
+    * on overwriting span operation name
+    * on setting span tags
+    * on finishing the span
+  * **Final/non-final sampling state**: the new `SamplerV2` API allows the sampler
+    to indicate if the negative sampling decision is final or not (positive sampling
+    decisions are always final). If the decision is not final, the sampler will be
+    called again on further span life cycle events, like setting tags.
+
+These new features are used in the experimental `x.TagMatchingSampler`, which
+can sample a trace based on a certain tag added to the root
+span or one of its local (in-process) children. The sampler can be used with
+another experimental `x.PrioritySampler` that allows multiple samplers to try
+to make a sampling decision, in a certain priority order.
+
+### Baggage Injection
+
+The OpenTracing spec allows for [baggage][baggage], which are key value pairs that are added
+to the span context and propagated throughout the trace. An external process can inject baggage
+by setting the special HTTP Header `jaeger-baggage` on a request:
+
+```sh
+curl -H "jaeger-baggage: key1=value1, key2=value2" http://myhost.com
+```
+
+Baggage can also be programatically set inside your service:
+
+```go
+if span := opentracing.SpanFromContext(ctx); span != nil {
+    span.SetBaggageItem("key", "value")
+}
+```
+
+Another service downstream of that can retrieve the baggage in a similar way:
+
+```go
+if span := opentracing.SpanFromContext(ctx); span != nil {
+    val := span.BaggageItem("key")
+    println(val)
+}
+```
+
+### Debug Traces (Forced Sampling)
+
+#### Programmatically
+
+The OpenTracing API defines a `sampling.priority` standard tag that
+can be used to affect the sampling of a span and its children:
+
+```go
+import (
+    "github.com/opentracing/opentracing-go"
+    "github.com/opentracing/opentracing-go/ext"
+)
+
+span := opentracing.SpanFromContext(ctx)
+ext.SamplingPriority.Set(span, 1)
+```
+
+#### Via HTTP Headers
+
+Jaeger Tracer also understands a special HTTP Header `jaeger-debug-id`,
+which can be set in the incoming request, e.g.
+
+```sh
+curl -H "jaeger-debug-id: some-correlation-id" http://myhost.com
+```
+
+When Jaeger sees this header in the request that otherwise has no
+tracing context, it ensures that the new trace started for this
+request will be sampled in the "debug" mode (meaning it should survive
+all downsampling that might happen in the collection pipeline), and the
+root span will have a tag as if this statement was executed:
+
+```go
+span.SetTag("jaeger-debug-id", "some-correlation-id")
+```
+
+This allows using Jaeger UI to find the trace by this tag.
+
+### Zipkin HTTP B3 compatible header propagation
+
+Jaeger Tracer supports Zipkin B3 Propagation HTTP headers, which are used
+by a lot of Zipkin tracers. This means that you can use Jaeger in conjunction with e.g. [these OpenZipkin tracers](https://github.com/openzipkin).
+
+However it is not the default propagation format, see [here](zipkin/README.md#NewZipkinB3HTTPHeaderPropagator) how to set it up.
+
+## SelfRef
+
+Jaeger Tracer supports an additional [span reference][] type call `Self`, which was proposed
+to the OpenTracing Specification (https://github.com/opentracing/specification/issues/81)
+but not yet accepted. This allows the caller to provide an already created `SpanContext`
+when starting a new span. The `Self` reference bypasses trace and span id generation,
+as well as sampling decisions (i.e. the sampling bit in the `SpanContext.flags` must be
+set appropriately by the caller).
+
+The `Self` reference supports the following use cases:
+  * the ability to provide externally generated trace and span IDs
+  * appending data to the same span from different processes, such as loading and continuing spans/traces from offline (ie log-based) storage
+
+Usage requires passing in a `SpanContext` and the `jaeger.Self` reference type:
+```
+span := tracer.StartSpan(
+    "continued_span",
+    jaeger.SelfRef(yourSpanContext),
+)
+...
+defer span.Finish()
+```
+
+## License
+
+[Apache 2.0 License](LICENSE).
+
+
+[doc-img]: https://godoc.org/github.com/uber/jaeger-client-go?status.svg
+[doc]: https://godoc.org/github.com/uber/jaeger-client-go
+[ci-img]: https://travis-ci.org/jaegertracing/jaeger-client-go.svg?branch=master
+[ci]: https://travis-ci.org/jaegertracing/jaeger-client-go
+[cov-img]: https://codecov.io/gh/jaegertracing/jaeger-client-go/branch/master/graph/badge.svg
+[cov]: https://codecov.io/gh/jaegertracing/jaeger-client-go
+[ot-img]: https://img.shields.io/badge/OpenTracing--1.0-enabled-blue.svg
+[ot-url]: http://opentracing.io
+[baggage]: https://github.com/opentracing/specification/blob/master/specification.md#set-a-baggage-item
+[timeunits]: https://golang.org/pkg/time/#ParseDuration
+[span reference]: https://github.com/opentracing/specification/blob/1.1/specification.md#references-between-spans
diff --git a/vendor/github.com/uber/jaeger-client-go/RELEASE.md b/vendor/github.com/uber/jaeger-client-go/RELEASE.md
new file mode 100644
index 0000000..12438d8
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/RELEASE.md
@@ -0,0 +1,12 @@
+# Release Process
+
+1. Create a PR "Preparing for release X.Y.Z" against master branch
+    * Alter CHANGELOG.md from `<placeholder_version> (unreleased)` to `<X.Y.Z> (YYYY-MM-DD)`
+    * Use `git log --pretty=format:'- %s -- %an'` as the basis for for changelog entries
+    * Update `JaegerClientVersion` in constants.go to `Go-X.Y.Z`
+2. Create a release "Release X.Y.Z" on Github
+    * Create Tag `vX.Y.Z`
+    * Copy CHANGELOG.md into the release notes
+3. Create a PR "Back to development" against master branch
+    * Add `<next_version> (unreleased)` to CHANGELOG.md
+    * Update `JaegerClientVersion` in constants.go to `Go-<next_version>dev`
diff --git a/vendor/github.com/uber/jaeger-client-go/baggage_setter.go b/vendor/github.com/uber/jaeger-client-go/baggage_setter.go
new file mode 100644
index 0000000..1037ca0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/baggage_setter.go
@@ -0,0 +1,77 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"github.com/opentracing/opentracing-go/log"
+
+	"github.com/uber/jaeger-client-go/internal/baggage"
+)
+
+// baggageSetter is an actor that can set a baggage value on a Span given certain
+// restrictions (eg. maxValueLength).
+type baggageSetter struct {
+	restrictionManager baggage.RestrictionManager
+	metrics            *Metrics
+}
+
+func newBaggageSetter(restrictionManager baggage.RestrictionManager, metrics *Metrics) *baggageSetter {
+	return &baggageSetter{
+		restrictionManager: restrictionManager,
+		metrics:            metrics,
+	}
+}
+
+// (NB) span should hold the lock before making this call
+func (s *baggageSetter) setBaggage(span *Span, key, value string) {
+	var truncated bool
+	var prevItem string
+	restriction := s.restrictionManager.GetRestriction(span.serviceName(), key)
+	if !restriction.KeyAllowed() {
+		s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
+		s.metrics.BaggageUpdateFailure.Inc(1)
+		return
+	}
+	if len(value) > restriction.MaxValueLength() {
+		truncated = true
+		value = value[:restriction.MaxValueLength()]
+		s.metrics.BaggageTruncate.Inc(1)
+	}
+	prevItem = span.context.baggage[key]
+	s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
+	span.context = span.context.WithBaggageItem(key, value)
+	s.metrics.BaggageUpdateSuccess.Inc(1)
+}
+
+func (s *baggageSetter) logFields(span *Span, key, value, prevItem string, truncated, valid bool) {
+	if !span.context.IsSampled() {
+		return
+	}
+	fields := []log.Field{
+		log.String("event", "baggage"),
+		log.String("key", key),
+		log.String("value", value),
+	}
+	if prevItem != "" {
+		fields = append(fields, log.String("override", "true"))
+	}
+	if truncated {
+		fields = append(fields, log.String("truncated", "true"))
+	}
+	if !valid {
+		fields = append(fields, log.String("invalid", "true"))
+	}
+	span.logFieldsNoLocking(fields...)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/config/config.go b/vendor/github.com/uber/jaeger-client-go/config/config.go
new file mode 100644
index 0000000..c2222f1
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/config/config.go
@@ -0,0 +1,447 @@
+// Copyright (c) 2017-2018 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"strings"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+	"github.com/uber/jaeger-client-go/utils"
+
+	"github.com/uber/jaeger-client-go"
+	"github.com/uber/jaeger-client-go/internal/baggage/remote"
+	throttler "github.com/uber/jaeger-client-go/internal/throttler/remote"
+	"github.com/uber/jaeger-client-go/rpcmetrics"
+	"github.com/uber/jaeger-client-go/transport"
+	"github.com/uber/jaeger-lib/metrics"
+)
+
+const defaultSamplingProbability = 0.001
+
+// Configuration configures and creates Jaeger Tracer
+type Configuration struct {
+	// ServiceName specifies the service name to use on the tracer.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_SERVICE_NAME
+	ServiceName string `yaml:"serviceName"`
+
+	// Disabled makes the config return opentracing.NoopTracer.
+	// Value can be provided by FromEnv() via the environment variable named JAEGER_DISABLED.
+	Disabled bool `yaml:"disabled"`
+
+	// RPCMetrics enables generations of RPC metrics (requires metrics factory to be provided).
+	// Value can be provided by FromEnv() via the environment variable named JAEGER_RPC_METRICS
+	RPCMetrics bool `yaml:"rpc_metrics"`
+
+	// Gen128Bit instructs the tracer to generate 128-bit wide trace IDs, compatible with W3C Trace Context.
+	// Value can be provided by FromEnv() via the environment variable named JAEGER_TRACEID_128BIT.
+	Gen128Bit bool `yaml:"traceid_128bit"`
+
+	// Tags can be provided by FromEnv() via the environment variable named JAEGER_TAGS
+	Tags []opentracing.Tag `yaml:"tags"`
+
+	Sampler             *SamplerConfig             `yaml:"sampler"`
+	Reporter            *ReporterConfig            `yaml:"reporter"`
+	Headers             *jaeger.HeadersConfig      `yaml:"headers"`
+	BaggageRestrictions *BaggageRestrictionsConfig `yaml:"baggage_restrictions"`
+	Throttler           *ThrottlerConfig           `yaml:"throttler"`
+}
+
+// SamplerConfig allows initializing a non-default sampler.  All fields are optional.
+type SamplerConfig struct {
+	// Type specifies the type of the sampler: const, probabilistic, rateLimiting, or remote.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_SAMPLER_TYPE
+	Type string `yaml:"type"`
+
+	// Param is a value passed to the sampler.
+	// Valid values for Param field are:
+	// - for "const" sampler, 0 or 1 for always false/true respectively
+	// - for "probabilistic" sampler, a probability between 0 and 1
+	// - for "rateLimiting" sampler, the number of spans per second
+	// - for "remote" sampler, param is the same as for "probabilistic"
+	//   and indicates the initial sampling rate before the actual one
+	//   is received from the mothership.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_SAMPLER_PARAM
+	Param float64 `yaml:"param"`
+
+	// SamplingServerURL is the URL of sampling manager that can provide
+	// sampling strategy to this service.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_SAMPLING_ENDPOINT
+	SamplingServerURL string `yaml:"samplingServerURL"`
+
+	// SamplingRefreshInterval controls how often the remotely controlled sampler will poll
+	// sampling manager for the appropriate sampling strategy.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_SAMPLER_REFRESH_INTERVAL
+	SamplingRefreshInterval time.Duration `yaml:"samplingRefreshInterval"`
+
+	// MaxOperations is the maximum number of operations that the PerOperationSampler
+	// will keep track of. If an operation is not tracked, a default probabilistic
+	// sampler will be used rather than the per operation specific sampler.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_SAMPLER_MAX_OPERATIONS.
+	MaxOperations int `yaml:"maxOperations"`
+
+	// Opt-in feature for applications that require late binding of span name via explicit
+	// call to SetOperationName when using PerOperationSampler. When this feature is enabled,
+	// the sampler will return retryable=true from OnCreateSpan(), thus leaving the sampling
+	// decision as non-final (and the span as writeable). This may lead to degraded performance
+	// in applications that always provide the correct span name on trace creation.
+	//
+	// For backwards compatibility this option is off by default.
+	OperationNameLateBinding bool `yaml:"operationNameLateBinding"`
+
+	// Options can be used to programmatically pass additional options to the Remote sampler.
+	Options []jaeger.SamplerOption
+}
+
+// ReporterConfig configures the reporter. All fields are optional.
+type ReporterConfig struct {
+	// QueueSize controls how many spans the reporter can keep in memory before it starts dropping
+	// new spans. The queue is continuously drained by a background go-routine, as fast as spans
+	// can be sent out of process.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_REPORTER_MAX_QUEUE_SIZE
+	QueueSize int `yaml:"queueSize"`
+
+	// BufferFlushInterval controls how often the buffer is force-flushed, even if it's not full.
+	// It is generally not useful, as it only matters for very low traffic services.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_REPORTER_FLUSH_INTERVAL
+	BufferFlushInterval time.Duration
+
+	// LogSpans, when true, enables LoggingReporter that runs in parallel with the main reporter
+	// and logs all submitted spans. Main Configuration.Logger must be initialized in the code
+	// for this option to have any effect.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_REPORTER_LOG_SPANS
+	LogSpans bool `yaml:"logSpans"`
+
+	// LocalAgentHostPort instructs reporter to send spans to jaeger-agent at this address.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_AGENT_HOST / JAEGER_AGENT_PORT
+	LocalAgentHostPort string `yaml:"localAgentHostPort"`
+
+	// DisableAttemptReconnecting when true, disables udp connection helper that periodically re-resolves
+	// the agent's hostname and reconnects if there was a change. This option only
+	// applies if LocalAgentHostPort is specified.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_REPORTER_ATTEMPT_RECONNECTING_DISABLED
+	DisableAttemptReconnecting bool `yaml:"disableAttemptReconnecting"`
+
+	// AttemptReconnectInterval controls how often the agent client re-resolves the provided hostname
+	// in order to detect address changes. This option only applies if DisableAttemptReconnecting is false.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_REPORTER_ATTEMPT_RECONNECT_INTERVAL
+	AttemptReconnectInterval time.Duration
+
+	// CollectorEndpoint instructs reporter to send spans to jaeger-collector at this URL.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_ENDPOINT
+	CollectorEndpoint string `yaml:"collectorEndpoint"`
+
+	// User instructs reporter to include a user for basic http authentication when sending spans to jaeger-collector.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_USER
+	User string `yaml:"user"`
+
+	// Password instructs reporter to include a password for basic http authentication when sending spans to
+	// jaeger-collector.
+	// Can be provided by FromEnv() via the environment variable named JAEGER_PASSWORD
+	Password string `yaml:"password"`
+
+	// HTTPHeaders instructs the reporter to add these headers to the http request when reporting spans.
+	// This field takes effect only when using HTTPTransport by setting the CollectorEndpoint.
+	HTTPHeaders map[string]string `yaml:"http_headers"`
+}
+
+// BaggageRestrictionsConfig configures the baggage restrictions manager which can be used to whitelist
+// certain baggage keys. All fields are optional.
+type BaggageRestrictionsConfig struct {
+	// DenyBaggageOnInitializationFailure controls the startup failure mode of the baggage restriction
+	// manager. If true, the manager will not allow any baggage to be written until baggage restrictions have
+	// been retrieved from jaeger-agent. If false, the manager wil allow any baggage to be written until baggage
+	// restrictions have been retrieved from jaeger-agent.
+	DenyBaggageOnInitializationFailure bool `yaml:"denyBaggageOnInitializationFailure"`
+
+	// HostPort is the hostPort of jaeger-agent's baggage restrictions server
+	HostPort string `yaml:"hostPort"`
+
+	// RefreshInterval controls how often the baggage restriction manager will poll
+	// jaeger-agent for the most recent baggage restrictions.
+	RefreshInterval time.Duration `yaml:"refreshInterval"`
+}
+
+// ThrottlerConfig configures the throttler which can be used to throttle the
+// rate at which the client may send debug requests.
+type ThrottlerConfig struct {
+	// HostPort of jaeger-agent's credit server.
+	HostPort string `yaml:"hostPort"`
+
+	// RefreshInterval controls how often the throttler will poll jaeger-agent
+	// for more throttling credits.
+	RefreshInterval time.Duration `yaml:"refreshInterval"`
+
+	// SynchronousInitialization determines whether or not the throttler should
+	// synchronously fetch credits from the agent when an operation is seen for
+	// the first time. This should be set to true if the client will be used by
+	// a short lived service that needs to ensure that credits are fetched
+	// upfront such that sampling or throttling occurs.
+	SynchronousInitialization bool `yaml:"synchronousInitialization"`
+}
+
+type nullCloser struct{}
+
+func (*nullCloser) Close() error { return nil }
+
+// New creates a new Jaeger Tracer, and a closer func that can be used to flush buffers
+// before shutdown.
+//
+// Deprecated: use NewTracer() function
+func (c Configuration) New(
+	serviceName string,
+	options ...Option,
+) (opentracing.Tracer, io.Closer, error) {
+	if serviceName != "" {
+		c.ServiceName = serviceName
+	}
+
+	return c.NewTracer(options...)
+}
+
+// NewTracer returns a new tracer based on the current configuration, using the given options,
+// and a closer func that can be used to flush buffers before shutdown.
+func (c Configuration) NewTracer(options ...Option) (opentracing.Tracer, io.Closer, error) {
+	if c.Disabled {
+		return &opentracing.NoopTracer{}, &nullCloser{}, nil
+	}
+
+	if c.ServiceName == "" {
+		return nil, nil, errors.New("no service name provided")
+	}
+
+	opts := applyOptions(options...)
+	tracerMetrics := jaeger.NewMetrics(opts.metrics, nil)
+	if c.RPCMetrics {
+		Observer(
+			rpcmetrics.NewObserver(
+				opts.metrics.Namespace(metrics.NSOptions{Name: "jaeger-rpc", Tags: map[string]string{"component": "jaeger"}}),
+				rpcmetrics.DefaultNameNormalizer,
+			),
+		)(&opts) // adds to c.observers
+	}
+	if c.Sampler == nil {
+		c.Sampler = &SamplerConfig{
+			Type:  jaeger.SamplerTypeRemote,
+			Param: defaultSamplingProbability,
+		}
+	}
+	if c.Reporter == nil {
+		c.Reporter = &ReporterConfig{}
+	}
+
+	sampler := opts.sampler
+	if sampler == nil {
+		s, err := c.Sampler.NewSampler(c.ServiceName, tracerMetrics)
+		if err != nil {
+			return nil, nil, err
+		}
+		sampler = s
+	}
+
+	reporter := opts.reporter
+	if reporter == nil {
+		r, err := c.Reporter.NewReporter(c.ServiceName, tracerMetrics, opts.logger)
+		if err != nil {
+			return nil, nil, err
+		}
+		reporter = r
+	}
+
+	tracerOptions := []jaeger.TracerOption{
+		jaeger.TracerOptions.Metrics(tracerMetrics),
+		jaeger.TracerOptions.Logger(opts.logger),
+		jaeger.TracerOptions.CustomHeaderKeys(c.Headers),
+		jaeger.TracerOptions.PoolSpans(opts.poolSpans),
+		jaeger.TracerOptions.ZipkinSharedRPCSpan(opts.zipkinSharedRPCSpan),
+		jaeger.TracerOptions.MaxTagValueLength(opts.maxTagValueLength),
+		jaeger.TracerOptions.NoDebugFlagOnForcedSampling(opts.noDebugFlagOnForcedSampling),
+	}
+
+	if c.Gen128Bit || opts.gen128Bit {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Gen128Bit(true))
+	}
+
+	if opts.randomNumber != nil {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.RandomNumber(opts.randomNumber))
+	}
+
+	for _, tag := range opts.tags {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Tag(tag.Key, tag.Value))
+	}
+
+	for _, tag := range c.Tags {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Tag(tag.Key, tag.Value))
+	}
+
+	for _, obs := range opts.observers {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Observer(obs))
+	}
+
+	for _, cobs := range opts.contribObservers {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.ContribObserver(cobs))
+	}
+
+	for format, injector := range opts.injectors {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Injector(format, injector))
+	}
+
+	for format, extractor := range opts.extractors {
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.Extractor(format, extractor))
+	}
+
+	if c.BaggageRestrictions != nil {
+		mgr := remote.NewRestrictionManager(
+			c.ServiceName,
+			remote.Options.Metrics(tracerMetrics),
+			remote.Options.Logger(opts.logger),
+			remote.Options.HostPort(c.BaggageRestrictions.HostPort),
+			remote.Options.RefreshInterval(c.BaggageRestrictions.RefreshInterval),
+			remote.Options.DenyBaggageOnInitializationFailure(
+				c.BaggageRestrictions.DenyBaggageOnInitializationFailure,
+			),
+		)
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.BaggageRestrictionManager(mgr))
+	}
+
+	if c.Throttler != nil {
+		debugThrottler := throttler.NewThrottler(
+			c.ServiceName,
+			throttler.Options.Metrics(tracerMetrics),
+			throttler.Options.Logger(opts.logger),
+			throttler.Options.HostPort(c.Throttler.HostPort),
+			throttler.Options.RefreshInterval(c.Throttler.RefreshInterval),
+			throttler.Options.SynchronousInitialization(
+				c.Throttler.SynchronousInitialization,
+			),
+		)
+
+		tracerOptions = append(tracerOptions, jaeger.TracerOptions.DebugThrottler(debugThrottler))
+	}
+
+	tracer, closer := jaeger.NewTracer(
+		c.ServiceName,
+		sampler,
+		reporter,
+		tracerOptions...,
+	)
+
+	return tracer, closer, nil
+}
+
+// InitGlobalTracer creates a new Jaeger Tracer, and sets it as global OpenTracing Tracer.
+// It returns a closer func that can be used to flush buffers before shutdown.
+func (c Configuration) InitGlobalTracer(
+	serviceName string,
+	options ...Option,
+) (io.Closer, error) {
+	if c.Disabled {
+		return &nullCloser{}, nil
+	}
+	tracer, closer, err := c.New(serviceName, options...)
+	if err != nil {
+		return nil, err
+	}
+	opentracing.SetGlobalTracer(tracer)
+	return closer, nil
+}
+
+// NewSampler creates a new sampler based on the configuration
+func (sc *SamplerConfig) NewSampler(
+	serviceName string,
+	metrics *jaeger.Metrics,
+) (jaeger.Sampler, error) {
+	samplerType := strings.ToLower(sc.Type)
+	if samplerType == jaeger.SamplerTypeConst {
+		return jaeger.NewConstSampler(sc.Param != 0), nil
+	}
+	if samplerType == jaeger.SamplerTypeProbabilistic {
+		if sc.Param >= 0 && sc.Param <= 1.0 {
+			return jaeger.NewProbabilisticSampler(sc.Param)
+		}
+		return nil, fmt.Errorf(
+			"invalid Param for probabilistic sampler; expecting value between 0 and 1, received %v",
+			sc.Param,
+		)
+	}
+	if samplerType == jaeger.SamplerTypeRateLimiting {
+		return jaeger.NewRateLimitingSampler(sc.Param), nil
+	}
+	if samplerType == jaeger.SamplerTypeRemote || sc.Type == "" {
+		sc2 := *sc
+		sc2.Type = jaeger.SamplerTypeProbabilistic
+		initSampler, err := sc2.NewSampler(serviceName, nil)
+		if err != nil {
+			return nil, err
+		}
+		options := []jaeger.SamplerOption{
+			jaeger.SamplerOptions.Metrics(metrics),
+			jaeger.SamplerOptions.InitialSampler(initSampler),
+			jaeger.SamplerOptions.SamplingServerURL(sc.SamplingServerURL),
+			jaeger.SamplerOptions.MaxOperations(sc.MaxOperations),
+			jaeger.SamplerOptions.OperationNameLateBinding(sc.OperationNameLateBinding),
+			jaeger.SamplerOptions.SamplingRefreshInterval(sc.SamplingRefreshInterval),
+		}
+		options = append(options, sc.Options...)
+		return jaeger.NewRemotelyControlledSampler(serviceName, options...), nil
+	}
+	return nil, fmt.Errorf("unknown sampler type (%s)", sc.Type)
+}
+
+// NewReporter instantiates a new reporter that submits spans to the collector
+func (rc *ReporterConfig) NewReporter(
+	serviceName string,
+	metrics *jaeger.Metrics,
+	logger jaeger.Logger,
+) (jaeger.Reporter, error) {
+	sender, err := rc.newTransport(logger)
+	if err != nil {
+		return nil, err
+	}
+	reporter := jaeger.NewRemoteReporter(
+		sender,
+		jaeger.ReporterOptions.QueueSize(rc.QueueSize),
+		jaeger.ReporterOptions.BufferFlushInterval(rc.BufferFlushInterval),
+		jaeger.ReporterOptions.Logger(logger),
+		jaeger.ReporterOptions.Metrics(metrics))
+	if rc.LogSpans && logger != nil {
+		logger.Infof("Initializing logging reporter\n")
+		reporter = jaeger.NewCompositeReporter(jaeger.NewLoggingReporter(logger), reporter)
+	}
+	return reporter, err
+}
+
+func (rc *ReporterConfig) newTransport(logger jaeger.Logger) (jaeger.Transport, error) {
+	switch {
+	case rc.CollectorEndpoint != "":
+		httpOptions := []transport.HTTPOption{transport.HTTPHeaders(rc.HTTPHeaders)}
+		if rc.User != "" && rc.Password != "" {
+			httpOptions = append(httpOptions, transport.HTTPBasicAuth(rc.User, rc.Password))
+		}
+		return transport.NewHTTPTransport(rc.CollectorEndpoint, httpOptions...), nil
+	default:
+		return jaeger.NewUDPTransportWithParams(jaeger.UDPTransportParams{
+			AgentClientUDPParams: utils.AgentClientUDPParams{
+				HostPort:                   rc.LocalAgentHostPort,
+				Logger:                     logger,
+				DisableAttemptReconnecting: rc.DisableAttemptReconnecting,
+				AttemptReconnectInterval:   rc.AttemptReconnectInterval,
+			},
+		})
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/config/config_env.go b/vendor/github.com/uber/jaeger-client-go/config/config_env.go
new file mode 100644
index 0000000..0fc3c53
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/config/config_env.go
@@ -0,0 +1,268 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"fmt"
+	"net/url"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+	"github.com/pkg/errors"
+	"github.com/uber/jaeger-client-go"
+)
+
+const (
+	// environment variable names
+	envServiceName                         = "JAEGER_SERVICE_NAME"
+	envDisabled                            = "JAEGER_DISABLED"
+	envRPCMetrics                          = "JAEGER_RPC_METRICS"
+	envTags                                = "JAEGER_TAGS"
+	envSamplerType                         = "JAEGER_SAMPLER_TYPE"
+	envSamplerParam                        = "JAEGER_SAMPLER_PARAM"
+	envSamplerManagerHostPort              = "JAEGER_SAMPLER_MANAGER_HOST_PORT" // Deprecated by envSamplingEndpoint
+	envSamplingEndpoint                    = "JAEGER_SAMPLING_ENDPOINT"
+	envSamplerMaxOperations                = "JAEGER_SAMPLER_MAX_OPERATIONS"
+	envSamplerRefreshInterval              = "JAEGER_SAMPLER_REFRESH_INTERVAL"
+	envReporterMaxQueueSize                = "JAEGER_REPORTER_MAX_QUEUE_SIZE"
+	envReporterFlushInterval               = "JAEGER_REPORTER_FLUSH_INTERVAL"
+	envReporterLogSpans                    = "JAEGER_REPORTER_LOG_SPANS"
+	envReporterAttemptReconnectingDisabled = "JAEGER_REPORTER_ATTEMPT_RECONNECTING_DISABLED"
+	envReporterAttemptReconnectInterval    = "JAEGER_REPORTER_ATTEMPT_RECONNECT_INTERVAL"
+	envEndpoint                            = "JAEGER_ENDPOINT"
+	envUser                                = "JAEGER_USER"
+	envPassword                            = "JAEGER_PASSWORD"
+	envAgentHost                           = "JAEGER_AGENT_HOST"
+	envAgentPort                           = "JAEGER_AGENT_PORT"
+	env128bit                              = "JAEGER_TRACEID_128BIT"
+)
+
+// FromEnv uses environment variables to set the tracer's Configuration
+func FromEnv() (*Configuration, error) {
+	c := &Configuration{}
+	return c.FromEnv()
+}
+
+// FromEnv uses environment variables and overrides existing tracer's Configuration
+func (c *Configuration) FromEnv() (*Configuration, error) {
+	if e := os.Getenv(envServiceName); e != "" {
+		c.ServiceName = e
+	}
+
+	if e := os.Getenv(envRPCMetrics); e != "" {
+		if value, err := strconv.ParseBool(e); err == nil {
+			c.RPCMetrics = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envRPCMetrics, e)
+		}
+	}
+
+	if e := os.Getenv(envDisabled); e != "" {
+		if value, err := strconv.ParseBool(e); err == nil {
+			c.Disabled = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envDisabled, e)
+		}
+	}
+
+	if e := os.Getenv(envTags); e != "" {
+		c.Tags = parseTags(e)
+	}
+
+	if e := os.Getenv(env128bit); e != "" {
+		if value, err := strconv.ParseBool(e); err == nil {
+			c.Gen128Bit = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", env128bit, e)
+		}
+	}
+
+	if c.Sampler == nil {
+		c.Sampler = &SamplerConfig{}
+	}
+
+	if s, err := c.Sampler.samplerConfigFromEnv(); err == nil {
+		c.Sampler = s
+	} else {
+		return nil, errors.Wrap(err, "cannot obtain sampler config from env")
+	}
+
+	if c.Reporter == nil {
+		c.Reporter = &ReporterConfig{}
+	}
+
+	if r, err := c.Reporter.reporterConfigFromEnv(); err == nil {
+		c.Reporter = r
+	} else {
+		return nil, errors.Wrap(err, "cannot obtain reporter config from env")
+	}
+
+	return c, nil
+}
+
+// samplerConfigFromEnv creates a new SamplerConfig based on the environment variables
+func (sc *SamplerConfig) samplerConfigFromEnv() (*SamplerConfig, error) {
+	if e := os.Getenv(envSamplerType); e != "" {
+		sc.Type = e
+	}
+
+	if e := os.Getenv(envSamplerParam); e != "" {
+		if value, err := strconv.ParseFloat(e, 64); err == nil {
+			sc.Param = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerParam, e)
+		}
+	}
+
+	if e := os.Getenv(envSamplingEndpoint); e != "" {
+		sc.SamplingServerURL = e
+	} else if e := os.Getenv(envSamplerManagerHostPort); e != "" {
+		sc.SamplingServerURL = e
+	} else if e := os.Getenv(envAgentHost); e != "" {
+		// Fallback if we know the agent host - try the sampling endpoint there
+		sc.SamplingServerURL = fmt.Sprintf("http://%s:%d/sampling", e, jaeger.DefaultSamplingServerPort)
+	}
+
+	if e := os.Getenv(envSamplerMaxOperations); e != "" {
+		if value, err := strconv.ParseInt(e, 10, 0); err == nil {
+			sc.MaxOperations = int(value)
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerMaxOperations, e)
+		}
+	}
+
+	if e := os.Getenv(envSamplerRefreshInterval); e != "" {
+		if value, err := time.ParseDuration(e); err == nil {
+			sc.SamplingRefreshInterval = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envSamplerRefreshInterval, e)
+		}
+	}
+
+	return sc, nil
+}
+
+// reporterConfigFromEnv creates a new ReporterConfig based on the environment variables
+func (rc *ReporterConfig) reporterConfigFromEnv() (*ReporterConfig, error) {
+	if e := os.Getenv(envReporterMaxQueueSize); e != "" {
+		if value, err := strconv.ParseInt(e, 10, 0); err == nil {
+			rc.QueueSize = int(value)
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterMaxQueueSize, e)
+		}
+	}
+
+	if e := os.Getenv(envReporterFlushInterval); e != "" {
+		if value, err := time.ParseDuration(e); err == nil {
+			rc.BufferFlushInterval = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterFlushInterval, e)
+		}
+	}
+
+	if e := os.Getenv(envReporterLogSpans); e != "" {
+		if value, err := strconv.ParseBool(e); err == nil {
+			rc.LogSpans = value
+		} else {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterLogSpans, e)
+		}
+	}
+
+	if e := os.Getenv(envEndpoint); e != "" {
+		u, err := url.ParseRequestURI(e)
+		if err != nil {
+			return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envEndpoint, e)
+		}
+		rc.CollectorEndpoint = u.String()
+		user := os.Getenv(envUser)
+		pswd := os.Getenv(envPassword)
+		if user != "" && pswd == "" || user == "" && pswd != "" {
+			return nil, errors.Errorf("you must set %s and %s env vars together", envUser, envPassword)
+		}
+		rc.User = user
+		rc.Password = pswd
+	} else {
+		useEnv := false
+		host := jaeger.DefaultUDPSpanServerHost
+		if e := os.Getenv(envAgentHost); e != "" {
+			host = e
+			useEnv = true
+		}
+
+		port := jaeger.DefaultUDPSpanServerPort
+		if e := os.Getenv(envAgentPort); e != "" {
+			if value, err := strconv.ParseInt(e, 10, 0); err == nil {
+				port = int(value)
+				useEnv = true
+			} else {
+				return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envAgentPort, e)
+			}
+		}
+		if useEnv || rc.LocalAgentHostPort == "" {
+			rc.LocalAgentHostPort = fmt.Sprintf("%s:%d", host, port)
+		}
+
+		if e := os.Getenv(envReporterAttemptReconnectingDisabled); e != "" {
+			if value, err := strconv.ParseBool(e); err == nil {
+				rc.DisableAttemptReconnecting = value
+			} else {
+				return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterAttemptReconnectingDisabled, e)
+			}
+		}
+
+		if !rc.DisableAttemptReconnecting {
+			if e := os.Getenv(envReporterAttemptReconnectInterval); e != "" {
+				if value, err := time.ParseDuration(e); err == nil {
+					rc.AttemptReconnectInterval = value
+				} else {
+					return nil, errors.Wrapf(err, "cannot parse env var %s=%s", envReporterAttemptReconnectInterval, e)
+				}
+			}
+		}
+	}
+
+	return rc, nil
+}
+
+// parseTags parses the given string into a collection of Tags.
+// Spec for this value:
+// - comma separated list of key=value
+// - value can be specified using the notation ${envVar:defaultValue}, where `envVar`
+// is an environment variable and `defaultValue` is the value to use in case the env var is not set
+func parseTags(sTags string) []opentracing.Tag {
+	pairs := strings.Split(sTags, ",")
+	tags := make([]opentracing.Tag, 0)
+	for _, p := range pairs {
+		kv := strings.SplitN(p, "=", 2)
+		k, v := strings.TrimSpace(kv[0]), strings.TrimSpace(kv[1])
+
+		if strings.HasPrefix(v, "${") && strings.HasSuffix(v, "}") {
+			ed := strings.SplitN(v[2:len(v)-1], ":", 2)
+			e, d := ed[0], ed[1]
+			v = os.Getenv(e)
+			if v == "" && d != "" {
+				v = d
+			}
+		}
+
+		tag := opentracing.Tag{Key: k, Value: v}
+		tags = append(tags, tag)
+	}
+
+	return tags
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/config/options.go b/vendor/github.com/uber/jaeger-client-go/config/options.go
new file mode 100644
index 0000000..a2b9cbc
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/config/options.go
@@ -0,0 +1,173 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	opentracing "github.com/opentracing/opentracing-go"
+	"github.com/uber/jaeger-lib/metrics"
+
+	"github.com/uber/jaeger-client-go"
+)
+
+// Option is a function that sets some option on the client.
+type Option func(c *Options)
+
+// Options control behavior of the client.
+type Options struct {
+	metrics                     metrics.Factory
+	logger                      jaeger.Logger
+	reporter                    jaeger.Reporter
+	sampler                     jaeger.Sampler
+	contribObservers            []jaeger.ContribObserver
+	observers                   []jaeger.Observer
+	gen128Bit                   bool
+	poolSpans                   bool
+	zipkinSharedRPCSpan         bool
+	maxTagValueLength           int
+	noDebugFlagOnForcedSampling bool
+	tags                        []opentracing.Tag
+	injectors                   map[interface{}]jaeger.Injector
+	extractors                  map[interface{}]jaeger.Extractor
+	randomNumber                func() uint64
+}
+
+// Metrics creates an Option that initializes Metrics in the tracer,
+// which is used to emit statistics about spans.
+func Metrics(factory metrics.Factory) Option {
+	return func(c *Options) {
+		c.metrics = factory
+	}
+}
+
+// Logger can be provided to log Reporter errors, as well as to log spans
+// if Reporter.LogSpans is set to true.
+func Logger(logger jaeger.Logger) Option {
+	return func(c *Options) {
+		c.logger = logger
+	}
+}
+
+// Reporter can be provided explicitly to override the configuration.
+// Useful for testing, e.g. by passing InMemoryReporter.
+func Reporter(reporter jaeger.Reporter) Option {
+	return func(c *Options) {
+		c.reporter = reporter
+	}
+}
+
+// Sampler can be provided explicitly to override the configuration.
+func Sampler(sampler jaeger.Sampler) Option {
+	return func(c *Options) {
+		c.sampler = sampler
+	}
+}
+
+// Observer can be registered with the Tracer to receive notifications about new Spans.
+func Observer(observer jaeger.Observer) Option {
+	return func(c *Options) {
+		c.observers = append(c.observers, observer)
+	}
+}
+
+// ContribObserver can be registered with the Tracer to receive notifications
+// about new spans.
+func ContribObserver(observer jaeger.ContribObserver) Option {
+	return func(c *Options) {
+		c.contribObservers = append(c.contribObservers, observer)
+	}
+}
+
+// Gen128Bit specifies whether to generate 128bit trace IDs.
+func Gen128Bit(gen128Bit bool) Option {
+	return func(c *Options) {
+		c.gen128Bit = gen128Bit
+	}
+}
+
+// PoolSpans specifies whether to pool spans
+func PoolSpans(poolSpans bool) Option {
+	return func(c *Options) {
+		c.poolSpans = poolSpans
+	}
+}
+
+// ZipkinSharedRPCSpan creates an option that enables sharing span ID between client
+// and server spans a la zipkin. If false, client and server spans will be assigned
+// different IDs.
+func ZipkinSharedRPCSpan(zipkinSharedRPCSpan bool) Option {
+	return func(c *Options) {
+		c.zipkinSharedRPCSpan = zipkinSharedRPCSpan
+	}
+}
+
+// MaxTagValueLength can be provided to override the default max tag value length.
+func MaxTagValueLength(maxTagValueLength int) Option {
+	return func(c *Options) {
+		c.maxTagValueLength = maxTagValueLength
+	}
+}
+
+// NoDebugFlagOnForcedSampling can be used to decide whether debug flag will be set or not
+// when calling span.setSamplingPriority to force sample a span.
+func NoDebugFlagOnForcedSampling(noDebugFlagOnForcedSampling bool) Option {
+	return func(c *Options) {
+		c.noDebugFlagOnForcedSampling = noDebugFlagOnForcedSampling
+	}
+}
+
+// Tag creates an option that adds a tracer-level tag.
+func Tag(key string, value interface{}) Option {
+	return func(c *Options) {
+		c.tags = append(c.tags, opentracing.Tag{Key: key, Value: value})
+	}
+}
+
+// Injector registers an Injector with the given format.
+func Injector(format interface{}, injector jaeger.Injector) Option {
+	return func(c *Options) {
+		c.injectors[format] = injector
+	}
+}
+
+// Extractor registers an Extractor with the given format.
+func Extractor(format interface{}, extractor jaeger.Extractor) Option {
+	return func(c *Options) {
+		c.extractors[format] = extractor
+	}
+}
+
+// WithRandomNumber supplies a random number generator function to the Tracer used to generate trace and span IDs.
+func WithRandomNumber(f func() uint64) Option {
+	return func(c *Options) {
+		c.randomNumber = f
+	}
+}
+
+func applyOptions(options ...Option) Options {
+	opts := Options{
+		injectors:  make(map[interface{}]jaeger.Injector),
+		extractors: make(map[interface{}]jaeger.Extractor),
+	}
+	for _, option := range options {
+		option(&opts)
+	}
+	if opts.metrics == nil {
+		opts.metrics = metrics.NullFactory
+	}
+	if opts.logger == nil {
+		opts.logger = jaeger.NullLogger
+	}
+	return opts
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/constants.go b/vendor/github.com/uber/jaeger-client-go/constants.go
new file mode 100644
index 0000000..d8eb698
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/constants.go
@@ -0,0 +1,106 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+
+	"github.com/opentracing/opentracing-go"
+)
+
+const (
+	// JaegerClientVersion is the version of the client library reported as Span tag.
+	JaegerClientVersion = "Go-2.29.1"
+
+	// JaegerClientVersionTagKey is the name of the tag used to report client version.
+	JaegerClientVersionTagKey = "jaeger.version"
+
+	// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
+	// if found in the carrier, forces the trace to be sampled as "debug" trace.
+	// The value of the header is recorded as the tag on the root span, so that the
+	// trace can be found in the UI using this value as a correlation ID.
+	JaegerDebugHeader = "jaeger-debug-id"
+
+	// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
+	// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
+	// a root span does not exist.
+	JaegerBaggageHeader = "jaeger-baggage"
+
+	// TracerHostnameTagKey used to report host name of the process.
+	TracerHostnameTagKey = "hostname"
+
+	// TracerIPTagKey used to report ip of the process.
+	TracerIPTagKey = "ip"
+
+	// TracerUUIDTagKey used to report UUID of the client process.
+	TracerUUIDTagKey = "client-uuid"
+
+	// SamplerTypeTagKey reports which sampler was used on the root span.
+	SamplerTypeTagKey = "sampler.type"
+
+	// SamplerParamTagKey reports the parameter of the sampler, like sampling probability.
+	SamplerParamTagKey = "sampler.param"
+
+	// TraceContextHeaderName is the http header name used to propagate tracing context.
+	// This must be in lower-case to avoid mismatches when decoding incoming headers.
+	TraceContextHeaderName = "uber-trace-id"
+
+	// TracerStateHeaderName is deprecated.
+	// Deprecated: use TraceContextHeaderName
+	TracerStateHeaderName = TraceContextHeaderName
+
+	// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
+	// This must be in lower-case to avoid mismatches when decoding incoming headers.
+	TraceBaggageHeaderPrefix = "uberctx-"
+
+	// SamplerTypeConst is the type of sampler that always makes the same decision.
+	SamplerTypeConst = "const"
+
+	// SamplerTypeRemote is the type of sampler that polls Jaeger agent for sampling strategy.
+	SamplerTypeRemote = "remote"
+
+	// SamplerTypeProbabilistic is the type of sampler that samples traces
+	// with a certain fixed probability.
+	SamplerTypeProbabilistic = "probabilistic"
+
+	// SamplerTypeRateLimiting is the type of sampler that samples
+	// only up to a fixed number of traces per second.
+	SamplerTypeRateLimiting = "ratelimiting"
+
+	// SamplerTypeLowerBound is the type of sampler that samples
+	// at least a fixed number of traces per second.
+	SamplerTypeLowerBound = "lowerbound"
+
+	// DefaultUDPSpanServerHost is the default host to send the spans to, via UDP
+	DefaultUDPSpanServerHost = "localhost"
+
+	// DefaultUDPSpanServerPort is the default port to send the spans to, via UDP
+	DefaultUDPSpanServerPort = 6831
+
+	// DefaultSamplingServerPort is the default port to fetch sampling config from, via http
+	DefaultSamplingServerPort = 5778
+
+	// DefaultMaxTagValueLength is the default max length of byte array or string allowed in the tag value.
+	DefaultMaxTagValueLength = 256
+
+	// SelfRefType is a jaeger specific reference type that supports creating a span
+	// with an already defined context.
+	selfRefType opentracing.SpanReferenceType = 99
+)
+
+var (
+	// DefaultSamplingServerURL is the default url to fetch sampling config from, via http
+	DefaultSamplingServerURL = fmt.Sprintf("http://127.0.0.1:%d/sampling", DefaultSamplingServerPort)
+)
diff --git a/vendor/github.com/uber/jaeger-client-go/contrib_observer.go b/vendor/github.com/uber/jaeger-client-go/contrib_observer.go
new file mode 100644
index 0000000..4ce1881
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/contrib_observer.go
@@ -0,0 +1,56 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	opentracing "github.com/opentracing/opentracing-go"
+)
+
+// ContribObserver can be registered with the Tracer to receive notifications
+// about new Spans. Modelled after github.com/opentracing-contrib/go-observer.
+type ContribObserver interface {
+	// Create and return a span observer. Called when a span starts.
+	// If the Observer is not interested in the given span, it must return (nil, false).
+	// E.g :
+	//     func StartSpan(opName string, opts ...opentracing.StartSpanOption) {
+	//         var sp opentracing.Span
+	//         sso := opentracing.StartSpanOptions{}
+	//         if spanObserver, ok := Observer.OnStartSpan(span, opName, sso); ok {
+	//             // we have a valid SpanObserver
+	//         }
+	//         ...
+	//     }
+	OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool)
+}
+
+// ContribSpanObserver is created by the Observer and receives notifications
+// about other Span events. This interface is meant to match
+// github.com/opentracing-contrib/go-observer, via duck typing, without
+// directly importing the go-observer package.
+type ContribSpanObserver interface {
+	OnSetOperationName(operationName string)
+	OnSetTag(key string, value interface{})
+	OnFinish(options opentracing.FinishOptions)
+}
+
+// wrapper observer for the old observers (see observer.go)
+type oldObserver struct {
+	obs Observer
+}
+
+func (o *oldObserver) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) (ContribSpanObserver, bool) {
+	spanObserver := o.obs.OnStartSpan(operationName, options)
+	return spanObserver, spanObserver != nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/doc.go b/vendor/github.com/uber/jaeger-client-go/doc.go
new file mode 100644
index 0000000..4f55490
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/doc.go
@@ -0,0 +1,24 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package jaeger implements an OpenTracing (http://opentracing.io) Tracer.
+It is currently using Zipkin-compatible data model and can be directly
+itegrated with Zipkin backend (http://zipkin.io).
+
+For integration instructions please refer to the README:
+
+https://github.com/uber/jaeger-client-go/blob/master/README.md
+*/
+package jaeger
diff --git a/vendor/github.com/uber/jaeger-client-go/glide.lock b/vendor/github.com/uber/jaeger-client-go/glide.lock
new file mode 100644
index 0000000..c1ec339
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/glide.lock
@@ -0,0 +1,105 @@
+hash: 63bec420a22b7e5abac8c602c5cc9b66a33d6a1bfec8918eecc77fd344b759ed
+updated: 2020-07-31T13:30:37.242608-04:00
+imports:
+- name: github.com/beorn7/perks
+  version: 3a771d992973f24aa725d07868b467d1ddfceafb
+  subpackages:
+  - quantile
+- name: github.com/HdrHistogram/hdrhistogram-go
+  version: 3a0bb77429bd3a61596f5e8a3172445844342120
+- name: github.com/crossdock/crossdock-go
+  version: 049aabb0122b03bc9bd30cab8f3f91fb60166361
+  subpackages:
+  - assert
+  - require
+- name: github.com/davecgh/go-spew
+  version: 8991bc29aa16c548c550c7ff78260e27b9ab7c73
+  subpackages:
+  - spew
+- name: github.com/golang/mock
+  version: 51421b967af1f557f93a59e0057aaf15ca02e29c
+  subpackages:
+  - gomock
+- name: github.com/golang/protobuf
+  version: b5d812f8a3706043e23a9cd5babf2e5423744d30
+  subpackages:
+  - proto
+- name: github.com/matttproud/golang_protobuf_extensions
+  version: c182affec369e30f25d3eb8cd8a478dee585ae7d
+  subpackages:
+  - pbutil
+- name: github.com/opentracing/opentracing-go
+  version: d34af3eaa63c4d08ab54863a4bdd0daa45212e12
+  subpackages:
+  - ext
+  - harness
+  - log
+- name: github.com/pkg/errors
+  version: ba968bfe8b2f7e042a574c888954fccecfa385b4
+- name: github.com/pmezard/go-difflib
+  version: 5d4384ee4fb2527b0a1256a821ebfc92f91efefc
+  subpackages:
+  - difflib
+- name: github.com/prometheus/client_golang
+  version: 170205fb58decfd011f1550d4cfb737230d7ae4f
+  subpackages:
+  - prometheus
+  - prometheus/internal
+- name: github.com/prometheus/client_model
+  version: fd36f4220a901265f90734c3183c5f0c91daa0b8
+  subpackages:
+  - go
+- name: github.com/prometheus/common
+  version: 1ab4d74fc89940cfbc3c2b3a89821336cdefa119
+  subpackages:
+  - expfmt
+  - internal/bitbucket.org/ww/goautoneg
+  - model
+- name: github.com/prometheus/procfs
+  version: 8a055596020d692cf491851e47ba3e302d9f90ce
+  subpackages:
+  - internal/fs
+  - internal/util
+- name: github.com/stretchr/testify
+  version: f654a9112bbeac49ca2cd45bfbe11533c4666cf8
+  subpackages:
+  - assert
+  - mock
+  - require
+  - suite
+- name: github.com/uber-go/atomic
+  version: 845920076a298bdb984fb0f1b86052e4ca0a281c
+- name: github.com/uber/jaeger-lib
+  version: 48cc1df63e6be0d63b95677f0d22beb880bce1e4
+  subpackages:
+  - metrics
+  - metrics/metricstest
+  - metrics/prometheus
+- name: go.uber.org/atomic
+  version: 845920076a298bdb984fb0f1b86052e4ca0a281c
+- name: go.uber.org/multierr
+  version: b587143a48b62b01d337824eab43700af6ffe222
+- name: go.uber.org/zap
+  version: feeb9a050b31b40eec6f2470e7599eeeadfe5bdd
+  subpackages:
+  - buffer
+  - internal/bufferpool
+  - internal/color
+  - internal/exit
+  - zapcore
+  - zaptest/observer
+- name: golang.org/x/net
+  version: addf6b3196f61cd44ce5a76657913698c73479d0
+  subpackages:
+  - context
+  - context/ctxhttp
+- name: golang.org/x/sys
+  version: 3e129f6d46b10b0e1da36b3deffcb55e09631b64
+  subpackages:
+  - internal/unsafeheader
+  - windows
+- name: gopkg.in/yaml.v3
+  version: eeeca48fe7764f320e4870d231902bf9c1be2c08
+testImports:
+- name: github.com/stretchr/objx
+  version: 35313a95ee26395aa17d366c71a2ccf788fa69b6
diff --git a/vendor/github.com/uber/jaeger-client-go/glide.yaml b/vendor/github.com/uber/jaeger-client-go/glide.yaml
new file mode 100644
index 0000000..295678c
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/glide.yaml
@@ -0,0 +1,30 @@
+package: github.com/uber/jaeger-client-go
+import:
+- package: github.com/opentracing/opentracing-go
+  version: ^1.2
+  subpackages:
+  - ext
+  - log
+- package: github.com/crossdock/crossdock-go
+- package: github.com/uber/jaeger-lib
+  version: ^2.3.0
+  subpackages:
+  - metrics
+- package: github.com/pkg/errors
+  version: ~0.8.0
+- package: go.uber.org/zap
+  source: https://github.com/uber-go/zap.git
+  version: ^1
+- package: github.com/uber-go/atomic
+  version: ^1
+- package: github.com/prometheus/client_golang
+  version: 1.1
+- package: github.com/prometheus/procfs
+  version: 0.0.6
+testImport:
+- package: github.com/stretchr/testify
+  subpackages:
+  - assert
+  - require
+  - suite
+- package: github.com/golang/mock
diff --git a/vendor/github.com/uber/jaeger-client-go/header.go b/vendor/github.com/uber/jaeger-client-go/header.go
new file mode 100644
index 0000000..5da7035
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/header.go
@@ -0,0 +1,65 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+// HeadersConfig contains the values for the header keys that Jaeger will use.
+// These values may be either custom or default depending on whether custom
+// values were provided via a configuration.
+type HeadersConfig struct {
+	// JaegerDebugHeader is the name of HTTP header or a TextMap carrier key which,
+	// if found in the carrier, forces the trace to be sampled as "debug" trace.
+	// The value of the header is recorded as the tag on the root span, so that the
+	// trace can be found in the UI using this value as a correlation ID.
+	JaegerDebugHeader string `yaml:"jaegerDebugHeader"`
+
+	// JaegerBaggageHeader is the name of the HTTP header that is used to submit baggage.
+	// It differs from TraceBaggageHeaderPrefix in that it can be used only in cases where
+	// a root span does not exist.
+	JaegerBaggageHeader string `yaml:"jaegerBaggageHeader"`
+
+	// TraceContextHeaderName is the http header name used to propagate tracing context.
+	// This must be in lower-case to avoid mismatches when decoding incoming headers.
+	TraceContextHeaderName string `yaml:"TraceContextHeaderName"`
+
+	// TraceBaggageHeaderPrefix is the prefix for http headers used to propagate baggage.
+	// This must be in lower-case to avoid mismatches when decoding incoming headers.
+	TraceBaggageHeaderPrefix string `yaml:"traceBaggageHeaderPrefix"`
+}
+
+// ApplyDefaults sets missing configuration keys to default values
+func (c *HeadersConfig) ApplyDefaults() *HeadersConfig {
+	if c.JaegerBaggageHeader == "" {
+		c.JaegerBaggageHeader = JaegerBaggageHeader
+	}
+	if c.JaegerDebugHeader == "" {
+		c.JaegerDebugHeader = JaegerDebugHeader
+	}
+	if c.TraceBaggageHeaderPrefix == "" {
+		c.TraceBaggageHeaderPrefix = TraceBaggageHeaderPrefix
+	}
+	if c.TraceContextHeaderName == "" {
+		c.TraceContextHeaderName = TraceContextHeaderName
+	}
+	return c
+}
+
+func getDefaultHeadersConfig() *HeadersConfig {
+	return &HeadersConfig{
+		JaegerDebugHeader:        JaegerDebugHeader,
+		JaegerBaggageHeader:      JaegerBaggageHeader,
+		TraceContextHeaderName:   TraceContextHeaderName,
+		TraceBaggageHeaderPrefix: TraceBaggageHeaderPrefix,
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/options.go b/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/options.go
new file mode 100644
index 0000000..7457293
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/options.go
@@ -0,0 +1,101 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package remote
+
+import (
+	"time"
+
+	"github.com/uber/jaeger-client-go"
+)
+
+const (
+	defaultMaxValueLength  = 2048
+	defaultRefreshInterval = time.Minute
+	defaultHostPort        = "localhost:5778"
+)
+
+// Option is a function that sets some option on the RestrictionManager
+type Option func(options *options)
+
+// Options is a factory for all available options
+var Options options
+
+type options struct {
+	denyBaggageOnInitializationFailure bool
+	metrics                            *jaeger.Metrics
+	logger                             jaeger.Logger
+	hostPort                           string
+	refreshInterval                    time.Duration
+}
+
+// DenyBaggageOnInitializationFailure creates an Option that determines the startup failure mode of RestrictionManager.
+// If DenyBaggageOnInitializationFailure is true, RestrictionManager will not allow any baggage to be written until baggage
+// restrictions have been retrieved from agent.
+// If DenyBaggageOnInitializationFailure is false, RestrictionManager will allow any baggage to be written until baggage
+// restrictions have been retrieved from agent.
+func (options) DenyBaggageOnInitializationFailure(b bool) Option {
+	return func(o *options) {
+		o.denyBaggageOnInitializationFailure = b
+	}
+}
+
+// Metrics creates an Option that initializes Metrics on the RestrictionManager, which is used to emit statistics.
+func (options) Metrics(m *jaeger.Metrics) Option {
+	return func(o *options) {
+		o.metrics = m
+	}
+}
+
+// Logger creates an Option that sets the logger used by the RestrictionManager.
+func (options) Logger(logger jaeger.Logger) Option {
+	return func(o *options) {
+		o.logger = logger
+	}
+}
+
+// HostPort creates an Option that sets the hostPort of the local agent that contains the baggage restrictions.
+func (options) HostPort(hostPort string) Option {
+	return func(o *options) {
+		o.hostPort = hostPort
+	}
+}
+
+// RefreshInterval creates an Option that sets how often the RestrictionManager will poll local agent for
+// the baggage restrictions.
+func (options) RefreshInterval(refreshInterval time.Duration) Option {
+	return func(o *options) {
+		o.refreshInterval = refreshInterval
+	}
+}
+
+func applyOptions(o ...Option) options {
+	opts := options{}
+	for _, option := range o {
+		option(&opts)
+	}
+	if opts.metrics == nil {
+		opts.metrics = jaeger.NewNullMetrics()
+	}
+	if opts.logger == nil {
+		opts.logger = jaeger.NullLogger
+	}
+	if opts.hostPort == "" {
+		opts.hostPort = defaultHostPort
+	}
+	if opts.refreshInterval == 0 {
+		opts.refreshInterval = defaultRefreshInterval
+	}
+	return opts
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/restriction_manager.go b/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/restriction_manager.go
new file mode 100644
index 0000000..2f58bb5
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/baggage/remote/restriction_manager.go
@@ -0,0 +1,158 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package remote
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"sync"
+	"time"
+
+	"github.com/uber/jaeger-client-go/internal/baggage"
+	thrift "github.com/uber/jaeger-client-go/thrift-gen/baggage"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+type httpBaggageRestrictionManagerProxy struct {
+	url string
+}
+
+func newHTTPBaggageRestrictionManagerProxy(hostPort, serviceName string) *httpBaggageRestrictionManagerProxy {
+	v := url.Values{}
+	v.Set("service", serviceName)
+	return &httpBaggageRestrictionManagerProxy{
+		url: fmt.Sprintf("http://%s/baggageRestrictions?%s", hostPort, v.Encode()),
+	}
+}
+
+func (s *httpBaggageRestrictionManagerProxy) GetBaggageRestrictions(context.Context, string) ([]*thrift.BaggageRestriction, error) {
+	var out []*thrift.BaggageRestriction
+	if err := utils.GetJSON(s.url, &out); err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// RestrictionManager manages baggage restrictions by retrieving baggage restrictions from agent
+type RestrictionManager struct {
+	options
+
+	mux                sync.RWMutex
+	serviceName        string
+	restrictions       map[string]*baggage.Restriction
+	thriftProxy        thrift.BaggageRestrictionManager
+	pollStopped        sync.WaitGroup
+	stopPoll           chan struct{}
+	invalidRestriction *baggage.Restriction
+	validRestriction   *baggage.Restriction
+
+	// Determines if the manager has successfully retrieved baggage restrictions from agent
+	initialized bool
+}
+
+// NewRestrictionManager returns a BaggageRestrictionManager that polls the agent for the latest
+// baggage restrictions.
+func NewRestrictionManager(serviceName string, options ...Option) *RestrictionManager {
+	// TODO there is a developing use case where a single tracer can generate traces on behalf of many services.
+	// restrictionsMap will need to exist per service
+	opts := applyOptions(options...)
+	m := &RestrictionManager{
+		serviceName:        serviceName,
+		options:            opts,
+		restrictions:       make(map[string]*baggage.Restriction),
+		thriftProxy:        newHTTPBaggageRestrictionManagerProxy(opts.hostPort, serviceName),
+		stopPoll:           make(chan struct{}),
+		invalidRestriction: baggage.NewRestriction(false, 0),
+		validRestriction:   baggage.NewRestriction(true, defaultMaxValueLength),
+	}
+	m.pollStopped.Add(1)
+	go m.pollManager()
+	return m
+}
+
+// isReady returns true if the manager has retrieved baggage restrictions from the remote source.
+func (m *RestrictionManager) isReady() bool {
+	m.mux.RLock()
+	defer m.mux.RUnlock()
+	return m.initialized
+}
+
+// GetRestriction implements RestrictionManager#GetRestriction.
+func (m *RestrictionManager) GetRestriction(service, key string) *baggage.Restriction {
+	m.mux.RLock()
+	defer m.mux.RUnlock()
+	if !m.initialized {
+		if m.denyBaggageOnInitializationFailure {
+			return m.invalidRestriction
+		}
+		return m.validRestriction
+	}
+	if restriction, ok := m.restrictions[key]; ok {
+		return restriction
+	}
+	return m.invalidRestriction
+}
+
+// Close stops remote polling and closes the RemoteRestrictionManager.
+func (m *RestrictionManager) Close() error {
+	close(m.stopPoll)
+	m.pollStopped.Wait()
+	return nil
+}
+
+func (m *RestrictionManager) pollManager() {
+	defer m.pollStopped.Done()
+	// attempt to initialize baggage restrictions
+	if err := m.updateRestrictions(); err != nil {
+		m.logger.Error(fmt.Sprintf("Failed to initialize baggage restrictions: %s", err.Error()))
+	}
+	ticker := time.NewTicker(m.refreshInterval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ticker.C:
+			if err := m.updateRestrictions(); err != nil {
+				m.logger.Error(fmt.Sprintf("Failed to update baggage restrictions: %s", err.Error()))
+			}
+		case <-m.stopPoll:
+			return
+		}
+	}
+}
+
+func (m *RestrictionManager) updateRestrictions() error {
+	restrictions, err := m.thriftProxy.GetBaggageRestrictions(context.Background(), m.serviceName)
+	if err != nil {
+		m.metrics.BaggageRestrictionsUpdateFailure.Inc(1)
+		return err
+	}
+	newRestrictions := m.parseRestrictions(restrictions)
+	m.metrics.BaggageRestrictionsUpdateSuccess.Inc(1)
+	m.mux.Lock()
+	defer m.mux.Unlock()
+	m.initialized = true
+	m.restrictions = newRestrictions
+	return nil
+}
+
+func (m *RestrictionManager) parseRestrictions(restrictions []*thrift.BaggageRestriction) map[string]*baggage.Restriction {
+	setters := make(map[string]*baggage.Restriction, len(restrictions))
+	for _, restriction := range restrictions {
+		setters[restriction.BaggageKey] = baggage.NewRestriction(true, int(restriction.MaxValueLength))
+	}
+	return setters
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/baggage/restriction_manager.go b/vendor/github.com/uber/jaeger-client-go/internal/baggage/restriction_manager.go
new file mode 100644
index 0000000..c16a5c5
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/baggage/restriction_manager.go
@@ -0,0 +1,71 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package baggage
+
+const (
+	defaultMaxValueLength = 2048
+)
+
+// Restriction determines whether a baggage key is allowed and contains any restrictions on the baggage value.
+type Restriction struct {
+	keyAllowed     bool
+	maxValueLength int
+}
+
+// NewRestriction returns a new Restriction.
+func NewRestriction(keyAllowed bool, maxValueLength int) *Restriction {
+	return &Restriction{
+		keyAllowed:     keyAllowed,
+		maxValueLength: maxValueLength,
+	}
+}
+
+// KeyAllowed returns whether the baggage key for this restriction is allowed.
+func (r *Restriction) KeyAllowed() bool {
+	return r.keyAllowed
+}
+
+// MaxValueLength returns the max length for the baggage value.
+func (r *Restriction) MaxValueLength() int {
+	return r.maxValueLength
+}
+
+// RestrictionManager keeps track of valid baggage keys and their restrictions. The manager
+// will return a Restriction for a specific baggage key which will determine whether the baggage
+// key is allowed for the current service and any other applicable restrictions on the baggage
+// value.
+type RestrictionManager interface {
+	GetRestriction(service, key string) *Restriction
+}
+
+// DefaultRestrictionManager allows any baggage key.
+type DefaultRestrictionManager struct {
+	defaultRestriction *Restriction
+}
+
+// NewDefaultRestrictionManager returns a DefaultRestrictionManager.
+func NewDefaultRestrictionManager(maxValueLength int) *DefaultRestrictionManager {
+	if maxValueLength == 0 {
+		maxValueLength = defaultMaxValueLength
+	}
+	return &DefaultRestrictionManager{
+		defaultRestriction: &Restriction{keyAllowed: true, maxValueLength: maxValueLength},
+	}
+}
+
+// GetRestriction implements RestrictionManager#GetRestriction.
+func (m *DefaultRestrictionManager) GetRestriction(service, key string) *Restriction {
+	return m.defaultRestriction
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/reporterstats/stats.go b/vendor/github.com/uber/jaeger-client-go/internal/reporterstats/stats.go
new file mode 100644
index 0000000..fe0bef2
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/reporterstats/stats.go
@@ -0,0 +1,25 @@
+// Copyright (c) 2020 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package reporterstats
+
+// ReporterStats exposes some metrics from the RemoteReporter.
+type ReporterStats interface {
+	SpansDroppedFromQueue() int64
+}
+
+// Receiver can be implemented by a Transport to be given ReporterStats.
+type Receiver interface {
+	SetReporterStats(ReporterStats)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/spanlog/json.go b/vendor/github.com/uber/jaeger-client-go/internal/spanlog/json.go
new file mode 100644
index 0000000..0e10b8a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/spanlog/json.go
@@ -0,0 +1,81 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package spanlog
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/opentracing/opentracing-go/log"
+)
+
+type fieldsAsMap map[string]string
+
+// MaterializeWithJSON converts log Fields into JSON string
+// TODO refactor into pluggable materializer
+func MaterializeWithJSON(logFields []log.Field) ([]byte, error) {
+	fields := fieldsAsMap(make(map[string]string, len(logFields)))
+	for _, field := range logFields {
+		field.Marshal(fields)
+	}
+	if event, ok := fields["event"]; ok && len(fields) == 1 {
+		return []byte(event), nil
+	}
+	return json.Marshal(fields)
+}
+
+func (ml fieldsAsMap) EmitString(key, value string) {
+	ml[key] = value
+}
+
+func (ml fieldsAsMap) EmitBool(key string, value bool) {
+	ml[key] = fmt.Sprintf("%t", value)
+}
+
+func (ml fieldsAsMap) EmitInt(key string, value int) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitInt32(key string, value int32) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitInt64(key string, value int64) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitUint32(key string, value uint32) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitUint64(key string, value uint64) {
+	ml[key] = fmt.Sprintf("%d", value)
+}
+
+func (ml fieldsAsMap) EmitFloat32(key string, value float32) {
+	ml[key] = fmt.Sprintf("%f", value)
+}
+
+func (ml fieldsAsMap) EmitFloat64(key string, value float64) {
+	ml[key] = fmt.Sprintf("%f", value)
+}
+
+func (ml fieldsAsMap) EmitObject(key string, value interface{}) {
+	ml[key] = fmt.Sprintf("%+v", value)
+}
+
+func (ml fieldsAsMap) EmitLazyLogger(value log.LazyLogger) {
+	value(ml)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/options.go b/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/options.go
new file mode 100644
index 0000000..f52c322
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/options.go
@@ -0,0 +1,99 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package remote
+
+import (
+	"time"
+
+	"github.com/uber/jaeger-client-go"
+)
+
+const (
+	defaultHostPort        = "localhost:5778"
+	defaultRefreshInterval = time.Second * 5
+)
+
+// Option is a function that sets some option on the Throttler
+type Option func(options *options)
+
+// Options is a factory for all available options
+var Options options
+
+type options struct {
+	metrics                   *jaeger.Metrics
+	logger                    jaeger.Logger
+	hostPort                  string
+	refreshInterval           time.Duration
+	synchronousInitialization bool
+}
+
+// Metrics creates an Option that initializes Metrics on the Throttler, which is used to emit statistics.
+func (options) Metrics(m *jaeger.Metrics) Option {
+	return func(o *options) {
+		o.metrics = m
+	}
+}
+
+// Logger creates an Option that sets the logger used by the Throttler.
+func (options) Logger(logger jaeger.Logger) Option {
+	return func(o *options) {
+		o.logger = logger
+	}
+}
+
+// HostPort creates an Option that sets the hostPort of the local agent that keeps track of credits.
+func (options) HostPort(hostPort string) Option {
+	return func(o *options) {
+		o.hostPort = hostPort
+	}
+}
+
+// RefreshInterval creates an Option that sets how often the Throttler will poll local agent for
+// credits.
+func (options) RefreshInterval(refreshInterval time.Duration) Option {
+	return func(o *options) {
+		o.refreshInterval = refreshInterval
+	}
+}
+
+// SynchronousInitialization creates an Option that determines whether the throttler should synchronously
+// fetch credits from the agent when an operation is seen for the first time. This should be set to true
+// if the client will be used by a short lived service that needs to ensure that credits are fetched upfront
+// such that sampling or throttling occurs.
+func (options) SynchronousInitialization(b bool) Option {
+	return func(o *options) {
+		o.synchronousInitialization = b
+	}
+}
+
+func applyOptions(o ...Option) options {
+	opts := options{}
+	for _, option := range o {
+		option(&opts)
+	}
+	if opts.metrics == nil {
+		opts.metrics = jaeger.NewNullMetrics()
+	}
+	if opts.logger == nil {
+		opts.logger = jaeger.NullLogger
+	}
+	if opts.hostPort == "" {
+		opts.hostPort = defaultHostPort
+	}
+	if opts.refreshInterval == 0 {
+		opts.refreshInterval = defaultRefreshInterval
+	}
+	return opts
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/throttler.go b/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/throttler.go
new file mode 100644
index 0000000..20f434f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/throttler/remote/throttler.go
@@ -0,0 +1,216 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package remote
+
+import (
+	"fmt"
+	"net/url"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/pkg/errors"
+
+	"github.com/uber/jaeger-client-go"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+const (
+	// minimumCredits is the minimum amount of credits necessary to not be throttled.
+	// i.e. if currentCredits > minimumCredits, then the operation will not be throttled.
+	minimumCredits = 1.0
+)
+
+var (
+	errorUUIDNotSet = errors.New("Throttler UUID must be set")
+)
+
+type operationBalance struct {
+	Operation string  `json:"operation"`
+	Balance   float64 `json:"balance"`
+}
+
+type creditResponse struct {
+	Balances []operationBalance `json:"balances"`
+}
+
+type httpCreditManagerProxy struct {
+	hostPort string
+}
+
+func newHTTPCreditManagerProxy(hostPort string) *httpCreditManagerProxy {
+	return &httpCreditManagerProxy{
+		hostPort: hostPort,
+	}
+}
+
+// N.B. Operations list must not be empty.
+func (m *httpCreditManagerProxy) FetchCredits(uuid, serviceName string, operations []string) (*creditResponse, error) {
+	params := url.Values{}
+	params.Set("service", serviceName)
+	params.Set("uuid", uuid)
+	for _, op := range operations {
+		params.Add("operations", op)
+	}
+	var resp creditResponse
+	if err := utils.GetJSON(fmt.Sprintf("http://%s/credits?%s", m.hostPort, params.Encode()), &resp); err != nil {
+		return nil, errors.Wrap(err, "Failed to receive credits from agent")
+	}
+	return &resp, nil
+}
+
+// Throttler retrieves credits from agent and uses it to throttle operations.
+type Throttler struct {
+	options
+
+	mux           sync.RWMutex
+	service       string
+	uuid          atomic.Value
+	creditManager *httpCreditManagerProxy
+	credits       map[string]float64 // map of operation->credits
+	close         chan struct{}
+	stopped       sync.WaitGroup
+}
+
+// NewThrottler returns a Throttler that polls agent for credits and uses them to throttle
+// the service.
+func NewThrottler(service string, options ...Option) *Throttler {
+	opts := applyOptions(options...)
+	creditManager := newHTTPCreditManagerProxy(opts.hostPort)
+	t := &Throttler{
+		options:       opts,
+		creditManager: creditManager,
+		service:       service,
+		credits:       make(map[string]float64),
+		close:         make(chan struct{}),
+	}
+	t.stopped.Add(1)
+	go t.pollManager()
+	return t
+}
+
+// IsAllowed implements Throttler#IsAllowed.
+func (t *Throttler) IsAllowed(operation string) bool {
+	t.mux.Lock()
+	defer t.mux.Unlock()
+	value, ok := t.credits[operation]
+	if !ok || value == 0 {
+		if !ok {
+			// NOTE: This appears to be a no-op at first glance, but it stores
+			// the operation key in the map. Necessary for functionality of
+			// Throttler#operations method.
+			t.credits[operation] = 0
+		}
+		if !t.synchronousInitialization {
+			t.metrics.ThrottledDebugSpans.Inc(1)
+			return false
+		}
+		// If it is the first time this operation is being checked, synchronously fetch
+		// the credits.
+		credits, err := t.fetchCredits([]string{operation})
+		if err != nil {
+			// Failed to receive credits from agent, try again next time
+			t.logger.Error("Failed to fetch credits: " + err.Error())
+			return false
+		}
+		if len(credits.Balances) == 0 {
+			// This shouldn't happen but just in case
+			return false
+		}
+		for _, opBalance := range credits.Balances {
+			t.credits[opBalance.Operation] += opBalance.Balance
+		}
+	}
+	return t.isAllowed(operation)
+}
+
+// Close stops the throttler from fetching credits from remote.
+func (t *Throttler) Close() error {
+	close(t.close)
+	t.stopped.Wait()
+	return nil
+}
+
+// SetProcess implements ProcessSetter#SetProcess. It's imperative that the UUID is set before any remote
+// requests are made.
+func (t *Throttler) SetProcess(process jaeger.Process) {
+	if process.UUID != "" {
+		t.uuid.Store(process.UUID)
+	}
+}
+
+// N.B. This function must be called with the Write Lock
+func (t *Throttler) isAllowed(operation string) bool {
+	credits := t.credits[operation]
+	if credits < minimumCredits {
+		t.metrics.ThrottledDebugSpans.Inc(1)
+		return false
+	}
+	t.credits[operation] = credits - minimumCredits
+	return true
+}
+
+func (t *Throttler) pollManager() {
+	defer t.stopped.Done()
+	ticker := time.NewTicker(t.refreshInterval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+			t.refreshCredits()
+		case <-t.close:
+			return
+		}
+	}
+}
+
+func (t *Throttler) operations() []string {
+	t.mux.RLock()
+	defer t.mux.RUnlock()
+	operations := make([]string, 0, len(t.credits))
+	for op := range t.credits {
+		operations = append(operations, op)
+	}
+	return operations
+}
+
+func (t *Throttler) refreshCredits() {
+	operations := t.operations()
+	if len(operations) == 0 {
+		return
+	}
+	newCredits, err := t.fetchCredits(operations)
+	if err != nil {
+		t.metrics.ThrottlerUpdateFailure.Inc(1)
+		t.logger.Error("Failed to fetch credits: " + err.Error())
+		return
+	}
+	t.metrics.ThrottlerUpdateSuccess.Inc(1)
+
+	t.mux.Lock()
+	defer t.mux.Unlock()
+	for _, opBalance := range newCredits.Balances {
+		t.credits[opBalance.Operation] += opBalance.Balance
+	}
+}
+
+func (t *Throttler) fetchCredits(operations []string) (*creditResponse, error) {
+	uuid := t.uuid.Load()
+	uuidStr, _ := uuid.(string)
+	if uuid == nil || uuidStr == "" {
+		return nil, errorUUIDNotSet
+	}
+	return t.creditManager.FetchCredits(uuidStr, t.service, operations)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/internal/throttler/throttler.go b/vendor/github.com/uber/jaeger-client-go/internal/throttler/throttler.go
new file mode 100644
index 0000000..196ed69
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/internal/throttler/throttler.go
@@ -0,0 +1,32 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package throttler
+
+// Throttler is used to rate limits operations. For example, given how debug spans
+// are always sampled, a throttler can be enabled per client to rate limit the amount
+// of debug spans a client can start.
+type Throttler interface {
+	// IsAllowed determines whether the operation should be allowed and not be
+	// throttled.
+	IsAllowed(operation string) bool
+}
+
+// DefaultThrottler doesn't throttle at all.
+type DefaultThrottler struct{}
+
+// IsAllowed implements Throttler#IsAllowed.
+func (t DefaultThrottler) IsAllowed(operation string) bool {
+	return true
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/interop.go b/vendor/github.com/uber/jaeger-client-go/interop.go
new file mode 100644
index 0000000..8402d08
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/interop.go
@@ -0,0 +1,55 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"github.com/opentracing/opentracing-go"
+)
+
+// TODO this file should not be needed after TChannel PR.
+
+type formatKey int
+
+// SpanContextFormat is a constant used as OpenTracing Format.
+// Requires *SpanContext as carrier.
+// This format is intended for interop with TChannel or other Zipkin-like tracers.
+const SpanContextFormat formatKey = iota
+
+type jaegerTraceContextPropagator struct {
+	tracer *Tracer
+}
+
+func (p *jaegerTraceContextPropagator) Inject(
+	ctx SpanContext,
+	abstractCarrier interface{},
+) error {
+	carrier, ok := abstractCarrier.(*SpanContext)
+	if !ok {
+		return opentracing.ErrInvalidCarrier
+	}
+
+	carrier.CopyFrom(&ctx)
+	return nil
+}
+
+func (p *jaegerTraceContextPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+	carrier, ok := abstractCarrier.(*SpanContext)
+	if !ok {
+		return emptyContext, opentracing.ErrInvalidCarrier
+	}
+	ctx := new(SpanContext)
+	ctx.CopyFrom(carrier)
+	return *ctx, nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/jaeger_tag.go b/vendor/github.com/uber/jaeger-client-go/jaeger_tag.go
new file mode 100644
index 0000000..868b2a5
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/jaeger_tag.go
@@ -0,0 +1,84 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+
+	"github.com/opentracing/opentracing-go/log"
+
+	j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+)
+
+type tags []*j.Tag
+
+// ConvertLogsToJaegerTags converts log Fields into jaeger tags.
+func ConvertLogsToJaegerTags(logFields []log.Field) []*j.Tag {
+	fields := tags(make([]*j.Tag, 0, len(logFields)))
+	for _, field := range logFields {
+		field.Marshal(&fields)
+	}
+	return fields
+}
+
+func (t *tags) EmitString(key, value string) {
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_STRING, VStr: &value})
+}
+
+func (t *tags) EmitBool(key string, value bool) {
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_BOOL, VBool: &value})
+}
+
+func (t *tags) EmitInt(key string, value int) {
+	vLong := int64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
+}
+
+func (t *tags) EmitInt32(key string, value int32) {
+	vLong := int64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
+}
+
+func (t *tags) EmitInt64(key string, value int64) {
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &value})
+}
+
+func (t *tags) EmitUint32(key string, value uint32) {
+	vLong := int64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
+}
+
+func (t *tags) EmitUint64(key string, value uint64) {
+	vLong := int64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_LONG, VLong: &vLong})
+}
+
+func (t *tags) EmitFloat32(key string, value float32) {
+	vDouble := float64(value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_DOUBLE, VDouble: &vDouble})
+}
+
+func (t *tags) EmitFloat64(key string, value float64) {
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_DOUBLE, VDouble: &value})
+}
+
+func (t *tags) EmitObject(key string, value interface{}) {
+	vStr := fmt.Sprintf("%+v", value)
+	*t = append(*t, &j.Tag{Key: key, VType: j.TagType_STRING, VStr: &vStr})
+}
+
+func (t *tags) EmitLazyLogger(value log.LazyLogger) {
+	value(t)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go b/vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go
new file mode 100644
index 0000000..3ac2f8f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/jaeger_thrift_span.go
@@ -0,0 +1,181 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+
+	j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+// BuildJaegerThrift builds jaeger span based on internal span.
+// TODO: (breaking change) move to internal package.
+func BuildJaegerThrift(span *Span) *j.Span {
+	span.Lock()
+	defer span.Unlock()
+	startTime := utils.TimeToMicrosecondsSinceEpochInt64(span.startTime)
+	duration := span.duration.Nanoseconds() / int64(time.Microsecond)
+	jaegerSpan := &j.Span{
+		TraceIdLow:    int64(span.context.traceID.Low),
+		TraceIdHigh:   int64(span.context.traceID.High),
+		SpanId:        int64(span.context.spanID),
+		ParentSpanId:  int64(span.context.parentID),
+		OperationName: span.operationName,
+		Flags:         int32(span.context.samplingState.flags()),
+		StartTime:     startTime,
+		Duration:      duration,
+		Tags:          buildTags(span.tags, span.tracer.options.maxTagValueLength),
+		Logs:          buildLogs(span.logs),
+		References:    buildReferences(span.references),
+	}
+	return jaegerSpan
+}
+
+// BuildJaegerProcessThrift creates a thrift Process type.
+// TODO: (breaking change) move to internal package.
+func BuildJaegerProcessThrift(span *Span) *j.Process {
+	span.Lock()
+	defer span.Unlock()
+	return buildJaegerProcessThrift(span.tracer)
+}
+
+func buildJaegerProcessThrift(tracer *Tracer) *j.Process {
+	process := &j.Process{
+		ServiceName: tracer.serviceName,
+		Tags:        buildTags(tracer.tags, tracer.options.maxTagValueLength),
+	}
+	if tracer.process.UUID != "" {
+		process.Tags = append(process.Tags, &j.Tag{Key: TracerUUIDTagKey, VStr: &tracer.process.UUID, VType: j.TagType_STRING})
+	}
+	return process
+}
+
+func buildTags(tags []Tag, maxTagValueLength int) []*j.Tag {
+	jTags := make([]*j.Tag, 0, len(tags))
+	for _, tag := range tags {
+		jTag := buildTag(&tag, maxTagValueLength)
+		jTags = append(jTags, jTag)
+	}
+	return jTags
+}
+
+func buildLogs(logs []opentracing.LogRecord) []*j.Log {
+	jLogs := make([]*j.Log, 0, len(logs))
+	for _, log := range logs {
+		jLog := &j.Log{
+			Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(log.Timestamp),
+			Fields:    ConvertLogsToJaegerTags(log.Fields),
+		}
+		jLogs = append(jLogs, jLog)
+	}
+	return jLogs
+}
+
+func buildTag(tag *Tag, maxTagValueLength int) *j.Tag {
+	jTag := &j.Tag{Key: tag.key}
+	switch value := tag.value.(type) {
+	case string:
+		vStr := truncateString(value, maxTagValueLength)
+		jTag.VStr = &vStr
+		jTag.VType = j.TagType_STRING
+	case []byte:
+		if len(value) > maxTagValueLength {
+			value = value[:maxTagValueLength]
+		}
+		jTag.VBinary = value
+		jTag.VType = j.TagType_BINARY
+	case int:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case int8:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint8:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case int16:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint16:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case int32:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint32:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case int64:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case uint64:
+		vLong := int64(value)
+		jTag.VLong = &vLong
+		jTag.VType = j.TagType_LONG
+	case float32:
+		vDouble := float64(value)
+		jTag.VDouble = &vDouble
+		jTag.VType = j.TagType_DOUBLE
+	case float64:
+		vDouble := float64(value)
+		jTag.VDouble = &vDouble
+		jTag.VType = j.TagType_DOUBLE
+	case bool:
+		vBool := value
+		jTag.VBool = &vBool
+		jTag.VType = j.TagType_BOOL
+	default:
+		vStr := truncateString(stringify(value), maxTagValueLength)
+		jTag.VStr = &vStr
+		jTag.VType = j.TagType_STRING
+	}
+	return jTag
+}
+
+func buildReferences(references []Reference) []*j.SpanRef {
+	retMe := make([]*j.SpanRef, 0, len(references))
+	for _, ref := range references {
+		if ref.Type == opentracing.ChildOfRef {
+			retMe = append(retMe, spanRef(ref.Context, j.SpanRefType_CHILD_OF))
+		} else if ref.Type == opentracing.FollowsFromRef {
+			retMe = append(retMe, spanRef(ref.Context, j.SpanRefType_FOLLOWS_FROM))
+		}
+	}
+	return retMe
+}
+
+func spanRef(ctx SpanContext, refType j.SpanRefType) *j.SpanRef {
+	return &j.SpanRef{
+		RefType:     refType,
+		TraceIdLow:  int64(ctx.traceID.Low),
+		TraceIdHigh: int64(ctx.traceID.High),
+		SpanId:      int64(ctx.spanID),
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/log/logger.go b/vendor/github.com/uber/jaeger-client-go/log/logger.go
new file mode 100644
index 0000000..ced6e0c
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/log/logger.go
@@ -0,0 +1,141 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package log
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"sync"
+)
+
+// Logger provides an abstract interface for logging from Reporters.
+// Applications can provide their own implementation of this interface to adapt
+// reporters logging to whatever logging library they prefer (stdlib log,
+// logrus, go-logging, etc).
+type Logger interface {
+	// Error logs a message at error priority
+	Error(msg string)
+
+	// Infof logs a message at info priority
+	Infof(msg string, args ...interface{})
+}
+
+// StdLogger is implementation of the Logger interface that delegates to default `log` package
+var StdLogger = &stdLogger{}
+
+type stdLogger struct{}
+
+func (l *stdLogger) Error(msg string) {
+	log.Printf("ERROR: %s", msg)
+}
+
+// Infof logs a message at info priority
+func (l *stdLogger) Infof(msg string, args ...interface{}) {
+	log.Printf(msg, args...)
+}
+
+// Debugf logs a message at debug priority
+func (l *stdLogger) Debugf(msg string, args ...interface{}) {
+	log.Printf(fmt.Sprintf("DEBUG: %s", msg), args...)
+}
+
+// NullLogger is implementation of the Logger interface that is no-op
+var NullLogger = &nullLogger{}
+
+type nullLogger struct{}
+
+func (l *nullLogger) Error(msg string)                       {}
+func (l *nullLogger) Infof(msg string, args ...interface{})  {}
+func (l *nullLogger) Debugf(msg string, args ...interface{}) {}
+
+// BytesBufferLogger implements Logger backed by a bytes.Buffer.
+type BytesBufferLogger struct {
+	mux sync.Mutex
+	buf bytes.Buffer
+}
+
+// Error implements Logger.
+func (l *BytesBufferLogger) Error(msg string) {
+	l.mux.Lock()
+	l.buf.WriteString(fmt.Sprintf("ERROR: %s\n", msg))
+	l.mux.Unlock()
+}
+
+// Infof implements Logger.
+func (l *BytesBufferLogger) Infof(msg string, args ...interface{}) {
+	l.mux.Lock()
+	l.buf.WriteString("INFO: " + fmt.Sprintf(msg, args...) + "\n")
+	l.mux.Unlock()
+}
+
+// Debugf implements Logger.
+func (l *BytesBufferLogger) Debugf(msg string, args ...interface{}) {
+	l.mux.Lock()
+	l.buf.WriteString("DEBUG: " + fmt.Sprintf(msg, args...) + "\n")
+	l.mux.Unlock()
+}
+
+// String returns string representation of the underlying buffer.
+func (l *BytesBufferLogger) String() string {
+	l.mux.Lock()
+	defer l.mux.Unlock()
+	return l.buf.String()
+}
+
+// Flush empties the underlying buffer.
+func (l *BytesBufferLogger) Flush() {
+	l.mux.Lock()
+	defer l.mux.Unlock()
+	l.buf.Reset()
+}
+
+// DebugLogger is an interface which adds a debug logging level
+type DebugLogger interface {
+	Logger
+
+	// Debugf logs a message at debug priority
+	Debugf(msg string, args ...interface{})
+}
+
+// DebugLogAdapter is a log adapter that converts a Logger into a DebugLogger
+// If the provided Logger doesn't satisfy the interface, a logger with debug
+// disabled is returned
+func DebugLogAdapter(logger Logger) DebugLogger {
+	if logger == nil {
+		return nil
+	}
+	if debugLogger, ok := logger.(DebugLogger); ok {
+		return debugLogger
+	}
+	logger.Infof("debug logging disabled")
+	return debugDisabledLogAdapter{logger: logger}
+}
+
+type debugDisabledLogAdapter struct {
+	logger Logger
+}
+
+func (d debugDisabledLogAdapter) Error(msg string) {
+	d.logger.Error(msg)
+}
+
+func (d debugDisabledLogAdapter) Infof(msg string, args ...interface{}) {
+	d.logger.Infof(msg, args...)
+}
+
+// Debugf is a nop
+func (d debugDisabledLogAdapter) Debugf(msg string, args ...interface{}) {
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/logger.go b/vendor/github.com/uber/jaeger-client-go/logger.go
new file mode 100644
index 0000000..d4f0b50
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/logger.go
@@ -0,0 +1,53 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import "log"
+
+// NB This will be deprecated in 3.0.0, please use jaeger-client-go/log/logger instead.
+
+// Logger provides an abstract interface for logging from Reporters.
+// Applications can provide their own implementation of this interface to adapt
+// reporters logging to whatever logging library they prefer (stdlib log,
+// logrus, go-logging, etc).
+type Logger interface {
+	// Error logs a message at error priority
+	Error(msg string)
+
+	// Infof logs a message at info priority
+	Infof(msg string, args ...interface{})
+}
+
+// StdLogger is implementation of the Logger interface that delegates to default `log` package
+var StdLogger = &stdLogger{}
+
+type stdLogger struct{}
+
+func (l *stdLogger) Error(msg string) {
+	log.Printf("ERROR: %s", msg)
+}
+
+// Infof logs a message at info priority
+func (l *stdLogger) Infof(msg string, args ...interface{}) {
+	log.Printf(msg, args...)
+}
+
+// NullLogger is implementation of the Logger interface that delegates to default `log` package
+var NullLogger = &nullLogger{}
+
+type nullLogger struct{}
+
+func (l *nullLogger) Error(msg string)                      {}
+func (l *nullLogger) Infof(msg string, args ...interface{}) {}
diff --git a/vendor/github.com/uber/jaeger-client-go/metrics.go b/vendor/github.com/uber/jaeger-client-go/metrics.go
new file mode 100644
index 0000000..50e4e22
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/metrics.go
@@ -0,0 +1,119 @@
+// Copyright (c) 2017-2018 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"github.com/uber/jaeger-lib/metrics"
+)
+
+// Metrics is a container of all stats emitted by Jaeger tracer.
+type Metrics struct {
+	// Number of traces started by this tracer as sampled
+	TracesStartedSampled metrics.Counter `metric:"traces" tags:"state=started,sampled=y" help:"Number of traces started by this tracer as sampled"`
+
+	// Number of traces started by this tracer as not sampled
+	TracesStartedNotSampled metrics.Counter `metric:"traces" tags:"state=started,sampled=n" help:"Number of traces started by this tracer as not sampled"`
+
+	// Number of traces started by this tracer with delayed sampling
+	TracesStartedDelayedSampling metrics.Counter `metric:"traces" tags:"state=started,sampled=n" help:"Number of traces started by this tracer with delayed sampling"`
+
+	// Number of externally started sampled traces this tracer joined
+	TracesJoinedSampled metrics.Counter `metric:"traces" tags:"state=joined,sampled=y" help:"Number of externally started sampled traces this tracer joined"`
+
+	// Number of externally started not-sampled traces this tracer joined
+	TracesJoinedNotSampled metrics.Counter `metric:"traces" tags:"state=joined,sampled=n" help:"Number of externally started not-sampled traces this tracer joined"`
+
+	// Number of sampled spans started by this tracer
+	SpansStartedSampled metrics.Counter `metric:"started_spans" tags:"sampled=y" help:"Number of spans started by this tracer as sampled"`
+
+	// Number of not sampled spans started by this tracer
+	SpansStartedNotSampled metrics.Counter `metric:"started_spans" tags:"sampled=n" help:"Number of spans started by this tracer as not sampled"`
+
+	// Number of spans with delayed sampling started by this tracer
+	SpansStartedDelayedSampling metrics.Counter `metric:"started_spans" tags:"sampled=delayed" help:"Number of spans started by this tracer with delayed sampling"`
+
+	// Number of spans finished by this tracer
+	SpansFinishedSampled metrics.Counter `metric:"finished_spans" tags:"sampled=y" help:"Number of sampled spans finished by this tracer"`
+
+	// Number of spans finished by this tracer
+	SpansFinishedNotSampled metrics.Counter `metric:"finished_spans" tags:"sampled=n" help:"Number of not-sampled spans finished by this tracer"`
+
+	// Number of spans finished by this tracer
+	SpansFinishedDelayedSampling metrics.Counter `metric:"finished_spans" tags:"sampled=delayed" help:"Number of spans with delayed sampling finished by this tracer"`
+
+	// Number of errors decoding tracing context
+	DecodingErrors metrics.Counter `metric:"span_context_decoding_errors" help:"Number of errors decoding tracing context"`
+
+	// Number of spans successfully reported
+	ReporterSuccess metrics.Counter `metric:"reporter_spans" tags:"result=ok" help:"Number of spans successfully reported"`
+
+	// Number of spans not reported due to a Sender failure
+	ReporterFailure metrics.Counter `metric:"reporter_spans" tags:"result=err" help:"Number of spans not reported due to a Sender failure"`
+
+	// Number of spans dropped due to internal queue overflow
+	ReporterDropped metrics.Counter `metric:"reporter_spans" tags:"result=dropped" help:"Number of spans dropped due to internal queue overflow"`
+
+	// Current number of spans in the reporter queue
+	ReporterQueueLength metrics.Gauge `metric:"reporter_queue_length" help:"Current number of spans in the reporter queue"`
+
+	// Number of times the Sampler succeeded to retrieve sampling strategy
+	SamplerRetrieved metrics.Counter `metric:"sampler_queries" tags:"result=ok" help:"Number of times the Sampler succeeded to retrieve sampling strategy"`
+
+	// Number of times the Sampler failed to retrieve sampling strategy
+	SamplerQueryFailure metrics.Counter `metric:"sampler_queries" tags:"result=err" help:"Number of times the Sampler failed to retrieve sampling strategy"`
+
+	// Number of times the Sampler succeeded to retrieve and update sampling strategy
+	SamplerUpdated metrics.Counter `metric:"sampler_updates" tags:"result=ok" help:"Number of times the Sampler succeeded to retrieve and update sampling strategy"`
+
+	// Number of times the Sampler failed to update sampling strategy
+	SamplerUpdateFailure metrics.Counter `metric:"sampler_updates" tags:"result=err" help:"Number of times the Sampler failed to update sampling strategy"`
+
+	// Number of times baggage was successfully written or updated on spans.
+	BaggageUpdateSuccess metrics.Counter `metric:"baggage_updates" tags:"result=ok" help:"Number of times baggage was successfully written or updated on spans"`
+
+	// Number of times baggage failed to write or update on spans.
+	BaggageUpdateFailure metrics.Counter `metric:"baggage_updates" tags:"result=err" help:"Number of times baggage failed to write or update on spans"`
+
+	// Number of times baggage was truncated as per baggage restrictions.
+	BaggageTruncate metrics.Counter `metric:"baggage_truncations" help:"Number of times baggage was truncated as per baggage restrictions"`
+
+	// Number of times baggage restrictions were successfully updated.
+	BaggageRestrictionsUpdateSuccess metrics.Counter `metric:"baggage_restrictions_updates" tags:"result=ok" help:"Number of times baggage restrictions were successfully updated"`
+
+	// Number of times baggage restrictions failed to update.
+	BaggageRestrictionsUpdateFailure metrics.Counter `metric:"baggage_restrictions_updates" tags:"result=err" help:"Number of times baggage restrictions failed to update"`
+
+	// Number of times debug spans were throttled.
+	ThrottledDebugSpans metrics.Counter `metric:"throttled_debug_spans" help:"Number of times debug spans were throttled"`
+
+	// Number of times throttler successfully updated.
+	ThrottlerUpdateSuccess metrics.Counter `metric:"throttler_updates" tags:"result=ok" help:"Number of times throttler successfully updated"`
+
+	// Number of times throttler failed to update.
+	ThrottlerUpdateFailure metrics.Counter `metric:"throttler_updates" tags:"result=err" help:"Number of times throttler failed to update"`
+}
+
+// NewMetrics creates a new Metrics struct and initializes it.
+func NewMetrics(factory metrics.Factory, globalTags map[string]string) *Metrics {
+	m := &Metrics{}
+	// TODO the namespace "jaeger" should be configurable
+	metrics.MustInit(m, factory.Namespace(metrics.NSOptions{Name: "jaeger"}).Namespace(metrics.NSOptions{Name: "tracer"}), globalTags)
+	return m
+}
+
+// NewNullMetrics creates a new Metrics struct that won't report any metrics.
+func NewNullMetrics() *Metrics {
+	return NewMetrics(metrics.NullFactory, nil)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/observer.go b/vendor/github.com/uber/jaeger-client-go/observer.go
new file mode 100644
index 0000000..7bbd028
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/observer.go
@@ -0,0 +1,88 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import opentracing "github.com/opentracing/opentracing-go"
+
+// Observer can be registered with the Tracer to receive notifications about
+// new Spans.
+//
+// Deprecated: use jaeger.ContribObserver instead.
+type Observer interface {
+	OnStartSpan(operationName string, options opentracing.StartSpanOptions) SpanObserver
+}
+
+// SpanObserver is created by the Observer and receives notifications about
+// other Span events.
+//
+// Deprecated: use jaeger.ContribSpanObserver instead.
+type SpanObserver interface {
+	OnSetOperationName(operationName string)
+	OnSetTag(key string, value interface{})
+	OnFinish(options opentracing.FinishOptions)
+}
+
+// compositeObserver is a dispatcher to other observers
+type compositeObserver struct {
+	observers []ContribObserver
+}
+
+// compositeSpanObserver is a dispatcher to other span observers
+type compositeSpanObserver struct {
+	observers []ContribSpanObserver
+}
+
+// noopSpanObserver is used when there are no observers registered
+// on the Tracer or none of them returns span observers from OnStartSpan.
+var noopSpanObserver = &compositeSpanObserver{}
+
+func (o *compositeObserver) append(contribObserver ContribObserver) {
+	o.observers = append(o.observers, contribObserver)
+}
+
+func (o *compositeObserver) OnStartSpan(sp opentracing.Span, operationName string, options opentracing.StartSpanOptions) ContribSpanObserver {
+	var spanObservers []ContribSpanObserver
+	for _, obs := range o.observers {
+		spanObs, ok := obs.OnStartSpan(sp, operationName, options)
+		if ok {
+			if spanObservers == nil {
+				spanObservers = make([]ContribSpanObserver, 0, len(o.observers))
+			}
+			spanObservers = append(spanObservers, spanObs)
+		}
+	}
+	if len(spanObservers) == 0 {
+		return noopSpanObserver
+	}
+	return &compositeSpanObserver{observers: spanObservers}
+}
+
+func (o *compositeSpanObserver) OnSetOperationName(operationName string) {
+	for _, obs := range o.observers {
+		obs.OnSetOperationName(operationName)
+	}
+}
+
+func (o *compositeSpanObserver) OnSetTag(key string, value interface{}) {
+	for _, obs := range o.observers {
+		obs.OnSetTag(key, value)
+	}
+}
+
+func (o *compositeSpanObserver) OnFinish(options opentracing.FinishOptions) {
+	for _, obs := range o.observers {
+		obs.OnFinish(options)
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/process.go b/vendor/github.com/uber/jaeger-client-go/process.go
new file mode 100644
index 0000000..30cbf99
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/process.go
@@ -0,0 +1,29 @@
+// Copyright (c) 2018 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+// Process holds process specific metadata that's relevant to this client.
+type Process struct {
+	Service string
+	UUID    string
+	Tags    []Tag
+}
+
+// ProcessSetter sets a process. This can be used by any class that requires
+// the process to be set as part of initialization.
+// See internal/throttler/remote/throttler.go for an example.
+type ProcessSetter interface {
+	SetProcess(process Process)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/propagation.go b/vendor/github.com/uber/jaeger-client-go/propagation.go
new file mode 100644
index 0000000..e06459b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/propagation.go
@@ -0,0 +1,325 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"log"
+	"net/url"
+	"strings"
+	"sync"
+
+	opentracing "github.com/opentracing/opentracing-go"
+)
+
+// Injector is responsible for injecting SpanContext instances in a manner suitable
+// for propagation via a format-specific "carrier" object. Typically the
+// injection will take place across an RPC boundary, but message queues and
+// other IPC mechanisms are also reasonable places to use an Injector.
+type Injector interface {
+	// Inject takes `SpanContext` and injects it into `carrier`. The actual type
+	// of `carrier` depends on the `format` passed to `Tracer.Inject()`.
+	//
+	// Implementations may return opentracing.ErrInvalidCarrier or any other
+	// implementation-specific error if injection fails.
+	Inject(ctx SpanContext, carrier interface{}) error
+}
+
+// Extractor is responsible for extracting SpanContext instances from a
+// format-specific "carrier" object. Typically the extraction will take place
+// on the server side of an RPC boundary, but message queues and other IPC
+// mechanisms are also reasonable places to use an Extractor.
+type Extractor interface {
+	// Extract decodes a SpanContext instance from the given `carrier`,
+	// or (nil, opentracing.ErrSpanContextNotFound) if no context could
+	// be found in the `carrier`.
+	Extract(carrier interface{}) (SpanContext, error)
+}
+
+// TextMapPropagator is a combined Injector and Extractor for TextMap format
+type TextMapPropagator struct {
+	headerKeys  *HeadersConfig
+	metrics     Metrics
+	encodeValue func(string) string
+	decodeValue func(string) string
+}
+
+// NewTextMapPropagator creates a combined Injector and Extractor for TextMap format
+func NewTextMapPropagator(headerKeys *HeadersConfig, metrics Metrics) *TextMapPropagator {
+	return &TextMapPropagator{
+		headerKeys: headerKeys,
+		metrics:    metrics,
+		encodeValue: func(val string) string {
+			return val
+		},
+		decodeValue: func(val string) string {
+			return val
+		},
+	}
+}
+
+// NewHTTPHeaderPropagator creates a combined Injector and Extractor for HTTPHeaders format
+func NewHTTPHeaderPropagator(headerKeys *HeadersConfig, metrics Metrics) *TextMapPropagator {
+	return &TextMapPropagator{
+		headerKeys: headerKeys,
+		metrics:    metrics,
+		encodeValue: func(val string) string {
+			return url.QueryEscape(val)
+		},
+		decodeValue: func(val string) string {
+			// ignore decoding errors, cannot do anything about them
+			if v, err := url.QueryUnescape(val); err == nil {
+				return v
+			}
+			return val
+		},
+	}
+}
+
+// BinaryPropagator is a combined Injector and Extractor for Binary format
+type BinaryPropagator struct {
+	tracer  *Tracer
+	buffers sync.Pool
+}
+
+// NewBinaryPropagator creates a combined Injector and Extractor for Binary format
+func NewBinaryPropagator(tracer *Tracer) *BinaryPropagator {
+	return &BinaryPropagator{
+		tracer:  tracer,
+		buffers: sync.Pool{New: func() interface{} { return &bytes.Buffer{} }},
+	}
+}
+
+// Inject implements Injector of TextMapPropagator
+func (p *TextMapPropagator) Inject(
+	sc SpanContext,
+	abstractCarrier interface{},
+) error {
+	textMapWriter, ok := abstractCarrier.(opentracing.TextMapWriter)
+	if !ok {
+		return opentracing.ErrInvalidCarrier
+	}
+
+	// Do not encode the string with trace context to avoid accidental double-encoding
+	// if people are using opentracing < 0.10.0. Our colon-separated representation
+	// of the trace context is already safe for HTTP headers.
+	textMapWriter.Set(p.headerKeys.TraceContextHeaderName, sc.String())
+	for k, v := range sc.baggage {
+		safeKey := p.addBaggageKeyPrefix(k)
+		safeVal := p.encodeValue(v)
+		textMapWriter.Set(safeKey, safeVal)
+	}
+	return nil
+}
+
+// Extract implements Extractor of TextMapPropagator
+func (p *TextMapPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+	textMapReader, ok := abstractCarrier.(opentracing.TextMapReader)
+	if !ok {
+		return emptyContext, opentracing.ErrInvalidCarrier
+	}
+	var ctx SpanContext
+	var baggage map[string]string
+	err := textMapReader.ForeachKey(func(rawKey, value string) error {
+		key := strings.ToLower(rawKey) // TODO not necessary for plain TextMap
+		if key == p.headerKeys.TraceContextHeaderName {
+			var err error
+			safeVal := p.decodeValue(value)
+			if ctx, err = ContextFromString(safeVal); err != nil {
+				return err
+			}
+		} else if key == p.headerKeys.JaegerDebugHeader {
+			ctx.debugID = p.decodeValue(value)
+		} else if key == p.headerKeys.JaegerBaggageHeader {
+			if baggage == nil {
+				baggage = make(map[string]string)
+			}
+			for k, v := range p.parseCommaSeparatedMap(value) {
+				baggage[k] = v
+			}
+		} else if strings.HasPrefix(key, p.headerKeys.TraceBaggageHeaderPrefix) {
+			if baggage == nil {
+				baggage = make(map[string]string)
+			}
+			safeKey := p.removeBaggageKeyPrefix(key)
+			safeVal := p.decodeValue(value)
+			baggage[safeKey] = safeVal
+		}
+		return nil
+	})
+	if err != nil {
+		p.metrics.DecodingErrors.Inc(1)
+		return emptyContext, err
+	}
+	if !ctx.traceID.IsValid() && ctx.debugID == "" && len(baggage) == 0 {
+		return emptyContext, opentracing.ErrSpanContextNotFound
+	}
+	ctx.baggage = baggage
+	return ctx, nil
+}
+
+// Inject implements Injector of BinaryPropagator
+func (p *BinaryPropagator) Inject(
+	sc SpanContext,
+	abstractCarrier interface{},
+) error {
+	carrier, ok := abstractCarrier.(io.Writer)
+	if !ok {
+		return opentracing.ErrInvalidCarrier
+	}
+
+	// Handle the tracer context
+	if err := binary.Write(carrier, binary.BigEndian, sc.traceID); err != nil {
+		return err
+	}
+	if err := binary.Write(carrier, binary.BigEndian, sc.spanID); err != nil {
+		return err
+	}
+	if err := binary.Write(carrier, binary.BigEndian, sc.parentID); err != nil {
+		return err
+	}
+	if err := binary.Write(carrier, binary.BigEndian, sc.samplingState.flags()); err != nil {
+		return err
+	}
+
+	// Handle the baggage items
+	if err := binary.Write(carrier, binary.BigEndian, int32(len(sc.baggage))); err != nil {
+		return err
+	}
+	for k, v := range sc.baggage {
+		if err := binary.Write(carrier, binary.BigEndian, int32(len(k))); err != nil {
+			return err
+		}
+		io.WriteString(carrier, k)
+		if err := binary.Write(carrier, binary.BigEndian, int32(len(v))); err != nil {
+			return err
+		}
+		io.WriteString(carrier, v)
+	}
+
+	return nil
+}
+
+// W3C limits https://github.com/w3c/baggage/blob/master/baggage/HTTP_HEADER_FORMAT.md#limits
+const (
+	maxBinaryBaggage      = 180
+	maxBinaryNameValueLen = 4096
+)
+
+// Extract implements Extractor of BinaryPropagator
+func (p *BinaryPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+	carrier, ok := abstractCarrier.(io.Reader)
+	if !ok {
+		return emptyContext, opentracing.ErrInvalidCarrier
+	}
+	var ctx SpanContext
+	ctx.samplingState = &samplingState{}
+
+	if err := binary.Read(carrier, binary.BigEndian, &ctx.traceID); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	if err := binary.Read(carrier, binary.BigEndian, &ctx.spanID); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	if err := binary.Read(carrier, binary.BigEndian, &ctx.parentID); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+
+	var flags byte
+	if err := binary.Read(carrier, binary.BigEndian, &flags); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	ctx.samplingState.setFlags(flags)
+
+	// Handle the baggage items
+	var numBaggage int32
+	if err := binary.Read(carrier, binary.BigEndian, &numBaggage); err != nil {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	if numBaggage > maxBinaryBaggage {
+		return emptyContext, opentracing.ErrSpanContextCorrupted
+	}
+	if iNumBaggage := int(numBaggage); iNumBaggage > 0 {
+		ctx.baggage = make(map[string]string, iNumBaggage)
+		buf := p.buffers.Get().(*bytes.Buffer)
+		defer p.buffers.Put(buf)
+
+		var keyLen, valLen int32
+		for i := 0; i < iNumBaggage; i++ {
+			if err := binary.Read(carrier, binary.BigEndian, &keyLen); err != nil {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			buf.Reset()
+			buf.Grow(int(keyLen))
+			if n, err := io.CopyN(buf, carrier, int64(keyLen)); err != nil || int32(n) != keyLen {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			key := buf.String()
+
+			if err := binary.Read(carrier, binary.BigEndian, &valLen); err != nil {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			if keyLen+valLen > maxBinaryNameValueLen {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			buf.Reset()
+			buf.Grow(int(valLen))
+			if n, err := io.CopyN(buf, carrier, int64(valLen)); err != nil || int32(n) != valLen {
+				return emptyContext, opentracing.ErrSpanContextCorrupted
+			}
+			ctx.baggage[key] = buf.String()
+		}
+	}
+
+	return ctx, nil
+}
+
+// Converts a comma separated key value pair list into a map
+// e.g. key1=value1, key2=value2, key3 = value3
+// is converted to map[string]string { "key1" : "value1",
+//                                     "key2" : "value2",
+//                                     "key3" : "value3" }
+func (p *TextMapPropagator) parseCommaSeparatedMap(value string) map[string]string {
+	baggage := make(map[string]string)
+	value, err := url.QueryUnescape(value)
+	if err != nil {
+		log.Printf("Unable to unescape %s, %v", value, err)
+		return baggage
+	}
+	for _, kvpair := range strings.Split(value, ",") {
+		kv := strings.Split(strings.TrimSpace(kvpair), "=")
+		if len(kv) == 2 {
+			baggage[strings.TrimSpace(kv[0])] = kv[1]
+		} else {
+			log.Printf("Malformed value passed in for %s", p.headerKeys.JaegerBaggageHeader)
+		}
+	}
+	return baggage
+}
+
+// Converts a baggage item key into an http header format,
+// by prepending TraceBaggageHeaderPrefix and encoding the key string
+func (p *TextMapPropagator) addBaggageKeyPrefix(key string) string {
+	// TODO encodeBaggageKeyAsHeader add caching and escaping
+	return fmt.Sprintf("%v%v", p.headerKeys.TraceBaggageHeaderPrefix, key)
+}
+
+func (p *TextMapPropagator) removeBaggageKeyPrefix(key string) string {
+	// TODO decodeBaggageHeaderKey add caching and escaping
+	return key[len(p.headerKeys.TraceBaggageHeaderPrefix):]
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/reference.go b/vendor/github.com/uber/jaeger-client-go/reference.go
new file mode 100644
index 0000000..5646e78
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/reference.go
@@ -0,0 +1,23 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import "github.com/opentracing/opentracing-go"
+
+// Reference represents a causal reference to other Spans (via their SpanContext).
+type Reference struct {
+	Type    opentracing.SpanReferenceType
+	Context SpanContext
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/reporter.go b/vendor/github.com/uber/jaeger-client-go/reporter.go
new file mode 100644
index 0000000..a71a92c
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/reporter.go
@@ -0,0 +1,322 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+
+	"github.com/uber/jaeger-client-go/internal/reporterstats"
+	"github.com/uber/jaeger-client-go/log"
+)
+
+// Reporter is called by the tracer when a span is completed to report the span to the tracing collector.
+type Reporter interface {
+	// Report submits a new span to collectors, possibly asynchronously and/or with buffering.
+	// If the reporter is processing Span asynchronously then it needs to Retain() the span,
+	// and then Release() it when no longer needed, to avoid span data corruption.
+	Report(span *Span)
+
+	// Close does a clean shutdown of the reporter, flushing any traces that may be buffered in memory.
+	Close()
+}
+
+// ------------------------------
+
+type nullReporter struct{}
+
+// NewNullReporter creates a no-op reporter that ignores all reported spans.
+func NewNullReporter() Reporter {
+	return &nullReporter{}
+}
+
+// Report implements Report() method of Reporter by doing nothing.
+func (r *nullReporter) Report(span *Span) {
+	// no-op
+}
+
+// Close implements Close() method of Reporter by doing nothing.
+func (r *nullReporter) Close() {
+	// no-op
+}
+
+// ------------------------------
+
+type loggingReporter struct {
+	logger Logger
+}
+
+// NewLoggingReporter creates a reporter that logs all reported spans to provided logger.
+func NewLoggingReporter(logger Logger) Reporter {
+	return &loggingReporter{logger}
+}
+
+// Report implements Report() method of Reporter by logging the span to the logger.
+func (r *loggingReporter) Report(span *Span) {
+	r.logger.Infof("Reporting span %+v", span)
+}
+
+// Close implements Close() method of Reporter by doing nothing.
+func (r *loggingReporter) Close() {
+	// no-op
+}
+
+// ------------------------------
+
+// InMemoryReporter is used for testing, and simply collects spans in memory.
+type InMemoryReporter struct {
+	spans []opentracing.Span
+	lock  sync.Mutex
+}
+
+// NewInMemoryReporter creates a reporter that stores spans in memory.
+// NOTE: the Tracer should be created with options.PoolSpans = false.
+func NewInMemoryReporter() *InMemoryReporter {
+	return &InMemoryReporter{
+		spans: make([]opentracing.Span, 0, 10),
+	}
+}
+
+// Report implements Report() method of Reporter by storing the span in the buffer.
+func (r *InMemoryReporter) Report(span *Span) {
+	r.lock.Lock()
+	// Need to retain the span otherwise it will be released
+	r.spans = append(r.spans, span.Retain())
+	r.lock.Unlock()
+}
+
+// Close implements Close() method of Reporter
+func (r *InMemoryReporter) Close() {
+	r.Reset()
+}
+
+// SpansSubmitted returns the number of spans accumulated in the buffer.
+func (r *InMemoryReporter) SpansSubmitted() int {
+	r.lock.Lock()
+	defer r.lock.Unlock()
+	return len(r.spans)
+}
+
+// GetSpans returns accumulated spans as a copy of the buffer.
+func (r *InMemoryReporter) GetSpans() []opentracing.Span {
+	r.lock.Lock()
+	defer r.lock.Unlock()
+	copied := make([]opentracing.Span, len(r.spans))
+	copy(copied, r.spans)
+	return copied
+}
+
+// Reset clears all accumulated spans.
+func (r *InMemoryReporter) Reset() {
+	r.lock.Lock()
+	defer r.lock.Unlock()
+
+	// Before reset the collection need to release Span memory
+	for _, span := range r.spans {
+		span.(*Span).Release()
+	}
+	r.spans = r.spans[:0]
+}
+
+// ------------------------------
+
+type compositeReporter struct {
+	reporters []Reporter
+}
+
+// NewCompositeReporter creates a reporter that ignores all reported spans.
+func NewCompositeReporter(reporters ...Reporter) Reporter {
+	return &compositeReporter{reporters: reporters}
+}
+
+// Report implements Report() method of Reporter by delegating to each underlying reporter.
+func (r *compositeReporter) Report(span *Span) {
+	for _, reporter := range r.reporters {
+		reporter.Report(span)
+	}
+}
+
+// Close implements Close() method of Reporter by closing each underlying reporter.
+func (r *compositeReporter) Close() {
+	for _, reporter := range r.reporters {
+		reporter.Close()
+	}
+}
+
+// ------------- REMOTE REPORTER -----------------
+
+type reporterQueueItemType int
+
+const (
+	defaultQueueSize           = 100
+	defaultBufferFlushInterval = 1 * time.Second
+
+	reporterQueueItemSpan reporterQueueItemType = iota
+	reporterQueueItemClose
+)
+
+type reporterQueueItem struct {
+	itemType reporterQueueItemType
+	span     *Span
+	close    *sync.WaitGroup
+}
+
+// reporterStats implements reporterstats.ReporterStats.
+type reporterStats struct {
+	droppedCount int64 // provided to Transports to report data loss to the backend
+}
+
+// SpansDroppedFromQueue implements reporterstats.ReporterStats.
+func (r *reporterStats) SpansDroppedFromQueue() int64 {
+	return atomic.LoadInt64(&r.droppedCount)
+}
+
+func (r *reporterStats) incDroppedCount() {
+	atomic.AddInt64(&r.droppedCount, 1)
+}
+
+type remoteReporter struct {
+	// These fields must be first in the struct because `sync/atomic` expects 64-bit alignment.
+	// Cf. https://github.com/uber/jaeger-client-go/issues/155, https://goo.gl/zW7dgq
+	queueLength int64 // used to update metrics.Gauge
+	closed      int64 // 0 - not closed, 1 - closed
+
+	reporterOptions
+
+	sender        Transport
+	queue         chan reporterQueueItem
+	reporterStats *reporterStats
+}
+
+// NewRemoteReporter creates a new reporter that sends spans out of process by means of Sender.
+// Calls to Report(Span) return immediately (side effect: if internal buffer is full the span is dropped).
+// Periodically the transport buffer is flushed even if it hasn't reached max packet size.
+// Calls to Close() block until all spans reported prior to the call to Close are flushed.
+func NewRemoteReporter(sender Transport, opts ...ReporterOption) Reporter {
+	options := reporterOptions{}
+	for _, option := range opts {
+		option(&options)
+	}
+	if options.bufferFlushInterval <= 0 {
+		options.bufferFlushInterval = defaultBufferFlushInterval
+	}
+	if options.logger == nil {
+		options.logger = log.NullLogger
+	}
+	if options.metrics == nil {
+		options.metrics = NewNullMetrics()
+	}
+	if options.queueSize <= 0 {
+		options.queueSize = defaultQueueSize
+	}
+	reporter := &remoteReporter{
+		reporterOptions: options,
+		sender:          sender,
+		queue:           make(chan reporterQueueItem, options.queueSize),
+		reporterStats:   new(reporterStats),
+	}
+	if receiver, ok := sender.(reporterstats.Receiver); ok {
+		receiver.SetReporterStats(reporter.reporterStats)
+	}
+	go reporter.processQueue()
+	return reporter
+}
+
+// Report implements Report() method of Reporter.
+// It passes the span to a background go-routine for submission to Jaeger backend.
+// If the internal queue is full, the span is dropped and metrics.ReporterDropped counter is incremented.
+// If Report() is called after the reporter has been Close()-ed, the additional spans will not be
+// sent to the backend, but the metrics.ReporterDropped counter may not reflect them correctly,
+// because some of them may still be successfully added to the queue.
+func (r *remoteReporter) Report(span *Span) {
+	select {
+	// Need to retain the span otherwise it will be released
+	case r.queue <- reporterQueueItem{itemType: reporterQueueItemSpan, span: span.Retain()}:
+		atomic.AddInt64(&r.queueLength, 1)
+	default:
+		r.metrics.ReporterDropped.Inc(1)
+		r.reporterStats.incDroppedCount()
+	}
+}
+
+// Close implements Close() method of Reporter by waiting for the queue to be drained.
+func (r *remoteReporter) Close() {
+	r.logger.Debugf("closing reporter")
+	if swapped := atomic.CompareAndSwapInt64(&r.closed, 0, 1); !swapped {
+		r.logger.Error("Repeated attempt to close the reporter is ignored")
+		return
+	}
+	r.sendCloseEvent()
+	_ = r.sender.Close()
+}
+
+func (r *remoteReporter) sendCloseEvent() {
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+	item := reporterQueueItem{itemType: reporterQueueItemClose, close: wg}
+
+	r.queue <- item // if the queue is full we will block until there is space
+	atomic.AddInt64(&r.queueLength, 1)
+	wg.Wait()
+}
+
+// processQueue reads spans from the queue, converts them to Thrift, and stores them in an internal buffer.
+// When the buffer length reaches batchSize, it is flushed by submitting the accumulated spans to Jaeger.
+// Buffer also gets flushed automatically every batchFlushInterval seconds, just in case the tracer stopped
+// reporting new spans.
+func (r *remoteReporter) processQueue() {
+	// flush causes the Sender to flush its accumulated spans and clear the buffer
+	flush := func() {
+		if flushed, err := r.sender.Flush(); err != nil {
+			r.metrics.ReporterFailure.Inc(int64(flushed))
+			r.logger.Error(fmt.Sprintf("failed to flush Jaeger spans to server: %s", err.Error()))
+		} else if flushed > 0 {
+			r.metrics.ReporterSuccess.Inc(int64(flushed))
+		}
+	}
+
+	timer := time.NewTicker(r.bufferFlushInterval)
+	for {
+		select {
+		case <-timer.C:
+			flush()
+		case item := <-r.queue:
+			atomic.AddInt64(&r.queueLength, -1)
+			switch item.itemType {
+			case reporterQueueItemSpan:
+				span := item.span
+				if flushed, err := r.sender.Append(span); err != nil {
+					r.metrics.ReporterFailure.Inc(int64(flushed))
+					r.logger.Error(fmt.Sprintf("error reporting Jaeger span %q: %s", span.OperationName(), err.Error()))
+				} else if flushed > 0 {
+					r.metrics.ReporterSuccess.Inc(int64(flushed))
+					// to reduce the number of gauge stats, we only emit queue length on flush
+					r.metrics.ReporterQueueLength.Update(atomic.LoadInt64(&r.queueLength))
+					r.logger.Debugf("flushed %d spans", flushed)
+				}
+				span.Release()
+			case reporterQueueItemClose:
+				timer.Stop()
+				flush()
+				item.close.Done()
+				return
+			}
+		}
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/reporter_options.go b/vendor/github.com/uber/jaeger-client-go/reporter_options.go
new file mode 100644
index 0000000..2fc0305
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/reporter_options.go
@@ -0,0 +1,71 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"time"
+
+	"github.com/uber/jaeger-client-go/log"
+)
+
+// ReporterOption is a function that sets some option on the reporter.
+type ReporterOption func(c *reporterOptions)
+
+// ReporterOptions is a factory for all available ReporterOption's
+var ReporterOptions reporterOptions
+
+// reporterOptions control behavior of the reporter.
+type reporterOptions struct {
+	// queueSize is the size of internal queue where reported spans are stored before they are processed in the background
+	queueSize int
+	// bufferFlushInterval is how often the buffer is force-flushed, even if it's not full
+	bufferFlushInterval time.Duration
+	// logger is used to log errors of span submissions
+	logger log.DebugLogger
+	// metrics is used to record runtime stats
+	metrics *Metrics
+}
+
+// QueueSize creates a ReporterOption that sets the size of the internal queue where
+// spans are stored before they are processed.
+func (reporterOptions) QueueSize(queueSize int) ReporterOption {
+	return func(r *reporterOptions) {
+		r.queueSize = queueSize
+	}
+}
+
+// Metrics creates a ReporterOption that initializes Metrics in the reporter,
+// which is used to record runtime statistics.
+func (reporterOptions) Metrics(metrics *Metrics) ReporterOption {
+	return func(r *reporterOptions) {
+		r.metrics = metrics
+	}
+}
+
+// BufferFlushInterval creates a ReporterOption that sets how often the queue
+// is force-flushed.
+func (reporterOptions) BufferFlushInterval(bufferFlushInterval time.Duration) ReporterOption {
+	return func(r *reporterOptions) {
+		r.bufferFlushInterval = bufferFlushInterval
+	}
+}
+
+// Logger creates a ReporterOption that initializes the logger used to log
+// errors of span submissions.
+func (reporterOptions) Logger(logger Logger) ReporterOption {
+	return func(r *reporterOptions) {
+		r.logger = log.DebugLogAdapter(logger)
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/README.md b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/README.md
new file mode 100644
index 0000000..879948e
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/README.md
@@ -0,0 +1,5 @@
+An Observer that can be used to emit RPC metrics
+================================================
+
+It can be attached to the tracer during tracer construction.
+See `ExampleObserver` function in [observer_test.go](./observer_test.go).
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/doc.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/doc.go
new file mode 100644
index 0000000..51aa11b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/doc.go
@@ -0,0 +1,16 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package rpcmetrics implements an Observer that can be used to emit RPC metrics.
+package rpcmetrics
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/endpoints.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/endpoints.go
new file mode 100644
index 0000000..3055524
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/endpoints.go
@@ -0,0 +1,63 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rpcmetrics
+
+import "sync"
+
+// normalizedEndpoints is a cache for endpointName -> safeName mappings.
+type normalizedEndpoints struct {
+	names       map[string]string
+	maxSize     int
+	defaultName string
+	normalizer  NameNormalizer
+	mux         sync.RWMutex
+}
+
+func newNormalizedEndpoints(maxSize int, normalizer NameNormalizer) *normalizedEndpoints {
+	return &normalizedEndpoints{
+		maxSize:    maxSize,
+		normalizer: normalizer,
+		names:      make(map[string]string, maxSize),
+	}
+}
+
+// normalize looks up the name in the cache, if not found it uses normalizer
+// to convert the name to a safe name. If called with more than maxSize unique
+// names it returns "" for all other names beyond those already cached.
+func (n *normalizedEndpoints) normalize(name string) string {
+	n.mux.RLock()
+	norm, ok := n.names[name]
+	l := len(n.names)
+	n.mux.RUnlock()
+	if ok {
+		return norm
+	}
+	if l >= n.maxSize {
+		return ""
+	}
+	return n.normalizeWithLock(name)
+}
+
+func (n *normalizedEndpoints) normalizeWithLock(name string) string {
+	norm := n.normalizer.Normalize(name)
+	n.mux.Lock()
+	defer n.mux.Unlock()
+	// cache may have grown while we were not holding the lock
+	if len(n.names) >= n.maxSize {
+		return ""
+	}
+	n.names[name] = norm
+	return norm
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/metrics.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/metrics.go
new file mode 100644
index 0000000..a8cec2f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/metrics.go
@@ -0,0 +1,124 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rpcmetrics
+
+import (
+	"sync"
+
+	"github.com/uber/jaeger-lib/metrics"
+)
+
+const (
+	otherEndpointsPlaceholder = "other"
+	endpointNameMetricTag     = "endpoint"
+)
+
+// Metrics is a collection of metrics for an endpoint describing
+// throughput, success, errors, and performance.
+type Metrics struct {
+	// RequestCountSuccess is a counter of the total number of successes.
+	RequestCountSuccess metrics.Counter `metric:"requests" tags:"error=false"`
+
+	// RequestCountFailures is a counter of the number of times any failure has been observed.
+	RequestCountFailures metrics.Counter `metric:"requests" tags:"error=true"`
+
+	// RequestLatencySuccess is a latency histogram of successful requests.
+	RequestLatencySuccess metrics.Timer `metric:"request_latency" tags:"error=false"`
+
+	// RequestLatencyFailures is a latency histogram of failed requests.
+	RequestLatencyFailures metrics.Timer `metric:"request_latency" tags:"error=true"`
+
+	// HTTPStatusCode2xx is a counter of the total number of requests with HTTP status code 200-299
+	HTTPStatusCode2xx metrics.Counter `metric:"http_requests" tags:"status_code=2xx"`
+
+	// HTTPStatusCode3xx is a counter of the total number of requests with HTTP status code 300-399
+	HTTPStatusCode3xx metrics.Counter `metric:"http_requests" tags:"status_code=3xx"`
+
+	// HTTPStatusCode4xx is a counter of the total number of requests with HTTP status code 400-499
+	HTTPStatusCode4xx metrics.Counter `metric:"http_requests" tags:"status_code=4xx"`
+
+	// HTTPStatusCode5xx is a counter of the total number of requests with HTTP status code 500-599
+	HTTPStatusCode5xx metrics.Counter `metric:"http_requests" tags:"status_code=5xx"`
+}
+
+func (m *Metrics) recordHTTPStatusCode(statusCode uint16) {
+	if statusCode >= 200 && statusCode < 300 {
+		m.HTTPStatusCode2xx.Inc(1)
+	} else if statusCode >= 300 && statusCode < 400 {
+		m.HTTPStatusCode3xx.Inc(1)
+	} else if statusCode >= 400 && statusCode < 500 {
+		m.HTTPStatusCode4xx.Inc(1)
+	} else if statusCode >= 500 && statusCode < 600 {
+		m.HTTPStatusCode5xx.Inc(1)
+	}
+}
+
+// MetricsByEndpoint is a registry/cache of metrics for each unique endpoint name.
+// Only maxNumberOfEndpoints Metrics are stored, all other endpoint names are mapped
+// to a generic endpoint name "other".
+type MetricsByEndpoint struct {
+	metricsFactory    metrics.Factory
+	endpoints         *normalizedEndpoints
+	metricsByEndpoint map[string]*Metrics
+	mux               sync.RWMutex
+}
+
+func newMetricsByEndpoint(
+	metricsFactory metrics.Factory,
+	normalizer NameNormalizer,
+	maxNumberOfEndpoints int,
+) *MetricsByEndpoint {
+	return &MetricsByEndpoint{
+		metricsFactory:    metricsFactory,
+		endpoints:         newNormalizedEndpoints(maxNumberOfEndpoints, normalizer),
+		metricsByEndpoint: make(map[string]*Metrics, maxNumberOfEndpoints+1), // +1 for "other"
+	}
+}
+
+func (m *MetricsByEndpoint) get(endpoint string) *Metrics {
+	safeName := m.endpoints.normalize(endpoint)
+	if safeName == "" {
+		safeName = otherEndpointsPlaceholder
+	}
+	m.mux.RLock()
+	met := m.metricsByEndpoint[safeName]
+	m.mux.RUnlock()
+	if met != nil {
+		return met
+	}
+
+	return m.getWithWriteLock(safeName)
+}
+
+// split to make easier to test
+func (m *MetricsByEndpoint) getWithWriteLock(safeName string) *Metrics {
+	m.mux.Lock()
+	defer m.mux.Unlock()
+
+	// it is possible that the name has been already registered after we released
+	// the read lock and before we grabbed the write lock, so check for that.
+	if met, ok := m.metricsByEndpoint[safeName]; ok {
+		return met
+	}
+
+	// it would be nice to create the struct before locking, since Init() is somewhat
+	// expensive, however some metrics backends (e.g. expvar) may not like duplicate metrics.
+	met := &Metrics{}
+	tags := map[string]string{endpointNameMetricTag: safeName}
+	metrics.Init(met, m.metricsFactory, tags)
+
+	m.metricsByEndpoint[safeName] = met
+	return met
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go
new file mode 100644
index 0000000..148d84b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go
@@ -0,0 +1,101 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rpcmetrics
+
+// NameNormalizer is used to convert the endpoint names to strings
+// that can be safely used as tags in the metrics.
+type NameNormalizer interface {
+	Normalize(name string) string
+}
+
+// DefaultNameNormalizer converts endpoint names so that they contain only characters
+// from the safe charset [a-zA-Z0-9-./_]. All other characters are replaced with '-'.
+var DefaultNameNormalizer = &SimpleNameNormalizer{
+	SafeSets: []SafeCharacterSet{
+		&Range{From: 'a', To: 'z'},
+		&Range{From: 'A', To: 'Z'},
+		&Range{From: '0', To: '9'},
+		&Char{'-'},
+		&Char{'_'},
+		&Char{'/'},
+		&Char{'.'},
+	},
+	Replacement: '-',
+}
+
+// SimpleNameNormalizer uses a set of safe character sets.
+type SimpleNameNormalizer struct {
+	SafeSets    []SafeCharacterSet
+	Replacement byte
+}
+
+// SafeCharacterSet determines if the given character is "safe"
+type SafeCharacterSet interface {
+	IsSafe(c byte) bool
+}
+
+// Range implements SafeCharacterSet
+type Range struct {
+	From, To byte
+}
+
+// IsSafe implements SafeCharacterSet
+func (r *Range) IsSafe(c byte) bool {
+	return c >= r.From && c <= r.To
+}
+
+// Char implements SafeCharacterSet
+type Char struct {
+	Val byte
+}
+
+// IsSafe implements SafeCharacterSet
+func (ch *Char) IsSafe(c byte) bool {
+	return c == ch.Val
+}
+
+// Normalize checks each character in the string against SafeSets,
+// and if it's not safe substitutes it with Replacement.
+func (n *SimpleNameNormalizer) Normalize(name string) string {
+	var retMe []byte
+	nameBytes := []byte(name)
+	for i, b := range nameBytes {
+		if n.safeByte(b) {
+			if retMe != nil {
+				retMe[i] = b
+			}
+		} else {
+			if retMe == nil {
+				retMe = make([]byte, len(nameBytes))
+				copy(retMe[0:i], nameBytes[0:i])
+			}
+			retMe[i] = n.Replacement
+		}
+	}
+	if retMe == nil {
+		return name
+	}
+	return string(retMe)
+}
+
+// safeByte checks if b against all safe charsets.
+func (n *SimpleNameNormalizer) safeByte(b byte) bool {
+	for i := range n.SafeSets {
+		if n.SafeSets[i].IsSafe(b) {
+			return true
+		}
+	}
+	return false
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go
new file mode 100644
index 0000000..eca5ff6
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go
@@ -0,0 +1,171 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package rpcmetrics
+
+import (
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+	"github.com/uber/jaeger-lib/metrics"
+
+	jaeger "github.com/uber/jaeger-client-go"
+)
+
+const defaultMaxNumberOfEndpoints = 200
+
+// Observer is an observer that can emit RPC metrics.
+type Observer struct {
+	metricsByEndpoint *MetricsByEndpoint
+}
+
+// NewObserver creates a new observer that can emit RPC metrics.
+func NewObserver(metricsFactory metrics.Factory, normalizer NameNormalizer) *Observer {
+	return &Observer{
+		metricsByEndpoint: newMetricsByEndpoint(
+			metricsFactory,
+			normalizer,
+			defaultMaxNumberOfEndpoints,
+		),
+	}
+}
+
+// OnStartSpan creates a new Observer for the span.
+func (o *Observer) OnStartSpan(
+	operationName string,
+	options opentracing.StartSpanOptions,
+) jaeger.SpanObserver {
+	return NewSpanObserver(o.metricsByEndpoint, operationName, options)
+}
+
+// SpanKind identifies the span as inboud, outbound, or internal
+type SpanKind int
+
+const (
+	// Local span kind
+	Local SpanKind = iota
+	// Inbound span kind
+	Inbound
+	// Outbound span kind
+	Outbound
+)
+
+// SpanObserver collects RPC metrics
+type SpanObserver struct {
+	metricsByEndpoint *MetricsByEndpoint
+	operationName     string
+	startTime         time.Time
+	mux               sync.Mutex
+	kind              SpanKind
+	httpStatusCode    uint16
+	err               bool
+}
+
+// NewSpanObserver creates a new SpanObserver that can emit RPC metrics.
+func NewSpanObserver(
+	metricsByEndpoint *MetricsByEndpoint,
+	operationName string,
+	options opentracing.StartSpanOptions,
+) *SpanObserver {
+	so := &SpanObserver{
+		metricsByEndpoint: metricsByEndpoint,
+		operationName:     operationName,
+		startTime:         options.StartTime,
+	}
+	for k, v := range options.Tags {
+		so.handleTagInLock(k, v)
+	}
+	return so
+}
+
+// handleTags watches for special tags
+// - SpanKind
+// - HttpStatusCode
+// - Error
+func (so *SpanObserver) handleTagInLock(key string, value interface{}) {
+	if key == string(ext.SpanKind) {
+		if v, ok := value.(ext.SpanKindEnum); ok {
+			value = string(v)
+		}
+		if v, ok := value.(string); ok {
+			if v == string(ext.SpanKindRPCClientEnum) {
+				so.kind = Outbound
+			} else if v == string(ext.SpanKindRPCServerEnum) {
+				so.kind = Inbound
+			}
+		}
+		return
+	}
+	if key == string(ext.HTTPStatusCode) {
+		if v, ok := value.(uint16); ok {
+			so.httpStatusCode = v
+		} else if v, ok := value.(int); ok {
+			so.httpStatusCode = uint16(v)
+		} else if v, ok := value.(string); ok {
+			if vv, err := strconv.Atoi(v); err == nil {
+				so.httpStatusCode = uint16(vv)
+			}
+		}
+		return
+	}
+	if key == string(ext.Error) {
+		if v, ok := value.(bool); ok {
+			so.err = v
+		} else if v, ok := value.(string); ok {
+			if vv, err := strconv.ParseBool(v); err == nil {
+				so.err = vv
+			}
+		}
+		return
+	}
+}
+
+// OnFinish emits the RPC metrics. It only has an effect when operation name
+// is not blank, and the span kind is an RPC server.
+func (so *SpanObserver) OnFinish(options opentracing.FinishOptions) {
+	so.mux.Lock()
+	defer so.mux.Unlock()
+
+	if so.operationName == "" || so.kind != Inbound {
+		return
+	}
+
+	mets := so.metricsByEndpoint.get(so.operationName)
+	latency := options.FinishTime.Sub(so.startTime)
+	if so.err {
+		mets.RequestCountFailures.Inc(1)
+		mets.RequestLatencyFailures.Record(latency)
+	} else {
+		mets.RequestCountSuccess.Inc(1)
+		mets.RequestLatencySuccess.Record(latency)
+	}
+	mets.recordHTTPStatusCode(so.httpStatusCode)
+}
+
+// OnSetOperationName records new operation name.
+func (so *SpanObserver) OnSetOperationName(operationName string) {
+	so.mux.Lock()
+	so.operationName = operationName
+	so.mux.Unlock()
+}
+
+// OnSetTag implements SpanObserver
+func (so *SpanObserver) OnSetTag(key string, value interface{}) {
+	so.mux.Lock()
+	so.handleTagInLock(key, value)
+	so.mux.Unlock()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler.go b/vendor/github.com/uber/jaeger-client-go/sampler.go
new file mode 100644
index 0000000..d0be8ad
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/sampler.go
@@ -0,0 +1,516 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+	"math"
+	"strings"
+	"sync"
+
+	"github.com/uber/jaeger-client-go/thrift-gen/sampling"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+const (
+	defaultMaxOperations = 2000
+)
+
+// Sampler decides whether a new trace should be sampled or not.
+type Sampler interface {
+	// IsSampled decides whether a trace with given `id` and `operation`
+	// should be sampled. This function will also return the tags that
+	// can be used to identify the type of sampling that was applied to
+	// the root span. Most simple samplers would return two tags,
+	// sampler.type and sampler.param, similar to those used in the Configuration
+	IsSampled(id TraceID, operation string) (sampled bool, tags []Tag)
+
+	// Close does a clean shutdown of the sampler, stopping any background
+	// go-routines it may have started.
+	Close()
+
+	// Equal checks if the `other` sampler is functionally equivalent
+	// to this sampler.
+	// TODO (breaking change) remove this function. See PerOperationSampler.Equals for explanation.
+	Equal(other Sampler) bool
+}
+
+// -----------------------
+
+// ConstSampler is a sampler that always makes the same decision.
+type ConstSampler struct {
+	legacySamplerV1Base
+	Decision bool
+	tags     []Tag
+}
+
+// NewConstSampler creates a ConstSampler.
+func NewConstSampler(sample bool) *ConstSampler {
+	tags := []Tag{
+		{key: SamplerTypeTagKey, value: SamplerTypeConst},
+		{key: SamplerParamTagKey, value: sample},
+	}
+	s := &ConstSampler{
+		Decision: sample,
+		tags:     tags,
+	}
+	s.delegate = s.IsSampled
+	return s
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *ConstSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	return s.Decision, s.tags
+}
+
+// Close implements Close() of Sampler.
+func (s *ConstSampler) Close() {
+	// nothing to do
+}
+
+// Equal implements Equal() of Sampler.
+func (s *ConstSampler) Equal(other Sampler) bool {
+	if o, ok := other.(*ConstSampler); ok {
+		return s.Decision == o.Decision
+	}
+	return false
+}
+
+// String is used to log sampler details.
+func (s *ConstSampler) String() string {
+	return fmt.Sprintf("ConstSampler(decision=%t)", s.Decision)
+}
+
+// -----------------------
+
+// ProbabilisticSampler is a sampler that randomly samples a certain percentage
+// of traces.
+type ProbabilisticSampler struct {
+	legacySamplerV1Base
+	samplingRate     float64
+	samplingBoundary uint64
+	tags             []Tag
+}
+
+const maxRandomNumber = ^(uint64(1) << 63) // i.e. 0x7fffffffffffffff
+
+// NewProbabilisticSampler creates a sampler that randomly samples a certain percentage of traces specified by the
+// samplingRate, in the range between 0.0 and 1.0.
+//
+// It relies on the fact that new trace IDs are 63bit random numbers themselves, thus making the sampling decision
+// without generating a new random number, but simply calculating if traceID < (samplingRate * 2^63).
+// TODO remove the error from this function for next major release
+func NewProbabilisticSampler(samplingRate float64) (*ProbabilisticSampler, error) {
+	if samplingRate < 0.0 || samplingRate > 1.0 {
+		return nil, fmt.Errorf("Sampling Rate must be between 0.0 and 1.0, received %f", samplingRate)
+	}
+	return newProbabilisticSampler(samplingRate), nil
+}
+
+func newProbabilisticSampler(samplingRate float64) *ProbabilisticSampler {
+	s := new(ProbabilisticSampler)
+	s.delegate = s.IsSampled
+	return s.init(samplingRate)
+}
+
+func (s *ProbabilisticSampler) init(samplingRate float64) *ProbabilisticSampler {
+	s.samplingRate = math.Max(0.0, math.Min(samplingRate, 1.0))
+	s.samplingBoundary = uint64(float64(maxRandomNumber) * s.samplingRate)
+	s.tags = []Tag{
+		{key: SamplerTypeTagKey, value: SamplerTypeProbabilistic},
+		{key: SamplerParamTagKey, value: s.samplingRate},
+	}
+	return s
+}
+
+// SamplingRate returns the sampling probability this sampled was constructed with.
+func (s *ProbabilisticSampler) SamplingRate() float64 {
+	return s.samplingRate
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *ProbabilisticSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	return s.samplingBoundary >= id.Low&maxRandomNumber, s.tags
+}
+
+// Close implements Close() of Sampler.
+func (s *ProbabilisticSampler) Close() {
+	// nothing to do
+}
+
+// Equal implements Equal() of Sampler.
+func (s *ProbabilisticSampler) Equal(other Sampler) bool {
+	if o, ok := other.(*ProbabilisticSampler); ok {
+		return s.samplingBoundary == o.samplingBoundary
+	}
+	return false
+}
+
+// Update modifies in-place the sampling rate. Locking must be done externally.
+func (s *ProbabilisticSampler) Update(samplingRate float64) error {
+	if samplingRate < 0.0 || samplingRate > 1.0 {
+		return fmt.Errorf("Sampling Rate must be between 0.0 and 1.0, received %f", samplingRate)
+	}
+	s.init(samplingRate)
+	return nil
+}
+
+// String is used to log sampler details.
+func (s *ProbabilisticSampler) String() string {
+	return fmt.Sprintf("ProbabilisticSampler(samplingRate=%v)", s.samplingRate)
+}
+
+// -----------------------
+
+// RateLimitingSampler samples at most maxTracesPerSecond. The distribution of sampled traces follows
+// burstiness of the service, i.e. a service with uniformly distributed requests will have those
+// requests sampled uniformly as well, but if requests are bursty, especially sub-second, then a
+// number of sequential requests can be sampled each second.
+type RateLimitingSampler struct {
+	legacySamplerV1Base
+	maxTracesPerSecond float64
+	rateLimiter        *utils.ReconfigurableRateLimiter
+	tags               []Tag
+}
+
+// NewRateLimitingSampler creates new RateLimitingSampler.
+func NewRateLimitingSampler(maxTracesPerSecond float64) *RateLimitingSampler {
+	s := new(RateLimitingSampler)
+	s.delegate = s.IsSampled
+	return s.init(maxTracesPerSecond)
+}
+
+func (s *RateLimitingSampler) init(maxTracesPerSecond float64) *RateLimitingSampler {
+	if s.rateLimiter == nil {
+		s.rateLimiter = utils.NewRateLimiter(maxTracesPerSecond, math.Max(maxTracesPerSecond, 1.0))
+	} else {
+		s.rateLimiter.Update(maxTracesPerSecond, math.Max(maxTracesPerSecond, 1.0))
+	}
+	s.maxTracesPerSecond = maxTracesPerSecond
+	s.tags = []Tag{
+		{key: SamplerTypeTagKey, value: SamplerTypeRateLimiting},
+		{key: SamplerParamTagKey, value: maxTracesPerSecond},
+	}
+	return s
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *RateLimitingSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	return s.rateLimiter.CheckCredit(1.0), s.tags
+}
+
+// Update reconfigures the rate limiter, while preserving its accumulated balance.
+// Locking must be done externally.
+func (s *RateLimitingSampler) Update(maxTracesPerSecond float64) {
+	if s.maxTracesPerSecond != maxTracesPerSecond {
+		s.init(maxTracesPerSecond)
+	}
+}
+
+// Close does nothing.
+func (s *RateLimitingSampler) Close() {
+	// nothing to do
+}
+
+// Equal compares with another sampler.
+func (s *RateLimitingSampler) Equal(other Sampler) bool {
+	if o, ok := other.(*RateLimitingSampler); ok {
+		return s.maxTracesPerSecond == o.maxTracesPerSecond
+	}
+	return false
+}
+
+// String is used to log sampler details.
+func (s *RateLimitingSampler) String() string {
+	return fmt.Sprintf("RateLimitingSampler(maxTracesPerSecond=%v)", s.maxTracesPerSecond)
+}
+
+// -----------------------
+
+// GuaranteedThroughputProbabilisticSampler is a sampler that leverages both ProbabilisticSampler and
+// RateLimitingSampler. The RateLimitingSampler is used as a guaranteed lower bound sampler such that
+// every operation is sampled at least once in a time interval defined by the lowerBound. ie a lowerBound
+// of 1.0 / (60 * 10) will sample an operation at least once every 10 minutes.
+//
+// The ProbabilisticSampler is given higher priority when tags are emitted, ie. if IsSampled() for both
+// samplers return true, the tags for ProbabilisticSampler will be used.
+type GuaranteedThroughputProbabilisticSampler struct {
+	probabilisticSampler *ProbabilisticSampler
+	lowerBoundSampler    *RateLimitingSampler
+	tags                 []Tag
+	samplingRate         float64
+	lowerBound           float64
+}
+
+// NewGuaranteedThroughputProbabilisticSampler returns a delegating sampler that applies both
+// ProbabilisticSampler and RateLimitingSampler.
+func NewGuaranteedThroughputProbabilisticSampler(
+	lowerBound, samplingRate float64,
+) (*GuaranteedThroughputProbabilisticSampler, error) {
+	return newGuaranteedThroughputProbabilisticSampler(lowerBound, samplingRate), nil
+}
+
+func newGuaranteedThroughputProbabilisticSampler(lowerBound, samplingRate float64) *GuaranteedThroughputProbabilisticSampler {
+	s := &GuaranteedThroughputProbabilisticSampler{
+		lowerBoundSampler: NewRateLimitingSampler(lowerBound),
+		lowerBound:        lowerBound,
+	}
+	s.setProbabilisticSampler(samplingRate)
+	return s
+}
+
+func (s *GuaranteedThroughputProbabilisticSampler) setProbabilisticSampler(samplingRate float64) {
+	if s.probabilisticSampler == nil {
+		s.probabilisticSampler = newProbabilisticSampler(samplingRate)
+	} else if s.samplingRate != samplingRate {
+		s.probabilisticSampler.init(samplingRate)
+	}
+	// since we don't validate samplingRate, sampler may have clamped it to [0, 1] interval
+	samplingRate = s.probabilisticSampler.SamplingRate()
+	if s.samplingRate != samplingRate || s.tags == nil {
+		s.samplingRate = s.probabilisticSampler.SamplingRate()
+		s.tags = []Tag{
+			{key: SamplerTypeTagKey, value: SamplerTypeLowerBound},
+			{key: SamplerParamTagKey, value: s.samplingRate},
+		}
+	}
+}
+
+// IsSampled implements IsSampled() of Sampler.
+func (s *GuaranteedThroughputProbabilisticSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	if sampled, tags := s.probabilisticSampler.IsSampled(id, operation); sampled {
+		s.lowerBoundSampler.IsSampled(id, operation)
+		return true, tags
+	}
+	sampled, _ := s.lowerBoundSampler.IsSampled(id, operation)
+	return sampled, s.tags
+}
+
+// Close implements Close() of Sampler.
+func (s *GuaranteedThroughputProbabilisticSampler) Close() {
+	s.probabilisticSampler.Close()
+	s.lowerBoundSampler.Close()
+}
+
+// Equal implements Equal() of Sampler.
+func (s *GuaranteedThroughputProbabilisticSampler) Equal(other Sampler) bool {
+	// NB The Equal() function is expensive and will be removed. See PerOperationSampler.Equal() for
+	// more information.
+	return false
+}
+
+// this function should only be called while holding a Write lock
+func (s *GuaranteedThroughputProbabilisticSampler) update(lowerBound, samplingRate float64) {
+	s.setProbabilisticSampler(samplingRate)
+	if s.lowerBound != lowerBound {
+		s.lowerBoundSampler.Update(lowerBound)
+		s.lowerBound = lowerBound
+	}
+}
+
+func (s GuaranteedThroughputProbabilisticSampler) String() string {
+	return fmt.Sprintf("GuaranteedThroughputProbabilisticSampler(lowerBound=%f, samplingRate=%f)", s.lowerBound, s.samplingRate)
+}
+
+// -----------------------
+
+// PerOperationSampler is a delegating sampler that applies GuaranteedThroughputProbabilisticSampler
+// on a per-operation basis.
+type PerOperationSampler struct {
+	sync.RWMutex
+
+	samplers       map[string]*GuaranteedThroughputProbabilisticSampler
+	defaultSampler *ProbabilisticSampler
+	lowerBound     float64
+	maxOperations  int
+
+	// see description in PerOperationSamplerParams
+	operationNameLateBinding bool
+}
+
+// NewAdaptiveSampler returns a new PerOperationSampler.
+// Deprecated: please use NewPerOperationSampler.
+func NewAdaptiveSampler(strategies *sampling.PerOperationSamplingStrategies, maxOperations int) (*PerOperationSampler, error) {
+	return NewPerOperationSampler(PerOperationSamplerParams{
+		MaxOperations: maxOperations,
+		Strategies:    strategies,
+	}), nil
+}
+
+// PerOperationSamplerParams defines parameters when creating PerOperationSampler.
+type PerOperationSamplerParams struct {
+	// Max number of operations that will be tracked. Other operations will be given default strategy.
+	MaxOperations int
+
+	// Opt-in feature for applications that require late binding of span name via explicit call to SetOperationName.
+	// When this feature is enabled, the sampler will return retryable=true from OnCreateSpan(), thus leaving
+	// the sampling decision as non-final (and the span as writeable). This may lead to degraded performance
+	// in applications that always provide the correct span name on trace creation.
+	//
+	// For backwards compatibility this option is off by default.
+	OperationNameLateBinding bool
+
+	// Initial configuration of the sampling strategies (usually retrieved from the backend by Remote Sampler).
+	Strategies *sampling.PerOperationSamplingStrategies
+}
+
+// NewPerOperationSampler returns a new PerOperationSampler.
+func NewPerOperationSampler(params PerOperationSamplerParams) *PerOperationSampler {
+	if params.MaxOperations <= 0 {
+		params.MaxOperations = defaultMaxOperations
+	}
+	samplers := make(map[string]*GuaranteedThroughputProbabilisticSampler)
+	for _, strategy := range params.Strategies.PerOperationStrategies {
+		sampler := newGuaranteedThroughputProbabilisticSampler(
+			params.Strategies.DefaultLowerBoundTracesPerSecond,
+			strategy.ProbabilisticSampling.SamplingRate,
+		)
+		samplers[strategy.Operation] = sampler
+	}
+	return &PerOperationSampler{
+		samplers:                 samplers,
+		defaultSampler:           newProbabilisticSampler(params.Strategies.DefaultSamplingProbability),
+		lowerBound:               params.Strategies.DefaultLowerBoundTracesPerSecond,
+		maxOperations:            params.MaxOperations,
+		operationNameLateBinding: params.OperationNameLateBinding,
+	}
+}
+
+// IsSampled is not used and only exists to match Sampler V1 API.
+// TODO (breaking change) remove when upgrading everything to SamplerV2
+func (s *PerOperationSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	return false, nil
+}
+
+func (s *PerOperationSampler) trySampling(span *Span, operationName string) (bool, []Tag) {
+	samplerV1 := s.getSamplerForOperation(operationName)
+	var sampled bool
+	var tags []Tag
+	if span.context.samplingState.isLocalRootSpan(span.context.spanID) {
+		sampled, tags = samplerV1.IsSampled(span.context.TraceID(), operationName)
+	}
+	return sampled, tags
+}
+
+// OnCreateSpan implements OnCreateSpan of SamplerV2.
+func (s *PerOperationSampler) OnCreateSpan(span *Span) SamplingDecision {
+	sampled, tags := s.trySampling(span, span.OperationName())
+	return SamplingDecision{Sample: sampled, Retryable: s.operationNameLateBinding, Tags: tags}
+}
+
+// OnSetOperationName implements OnSetOperationName of SamplerV2.
+func (s *PerOperationSampler) OnSetOperationName(span *Span, operationName string) SamplingDecision {
+	sampled, tags := s.trySampling(span, operationName)
+	return SamplingDecision{Sample: sampled, Retryable: false, Tags: tags}
+}
+
+// OnSetTag implements OnSetTag of SamplerV2.
+func (s *PerOperationSampler) OnSetTag(span *Span, key string, value interface{}) SamplingDecision {
+	return SamplingDecision{Sample: false, Retryable: true}
+}
+
+// OnFinishSpan implements OnFinishSpan of SamplerV2.
+func (s *PerOperationSampler) OnFinishSpan(span *Span) SamplingDecision {
+	return SamplingDecision{Sample: false, Retryable: true}
+}
+
+func (s *PerOperationSampler) getSamplerForOperation(operation string) Sampler {
+	s.RLock()
+	sampler, ok := s.samplers[operation]
+	if ok {
+		defer s.RUnlock()
+		return sampler
+	}
+	s.RUnlock()
+	s.Lock()
+	defer s.Unlock()
+
+	// Check if sampler has already been created
+	sampler, ok = s.samplers[operation]
+	if ok {
+		return sampler
+	}
+	// Store only up to maxOperations of unique ops.
+	if len(s.samplers) >= s.maxOperations {
+		return s.defaultSampler
+	}
+	newSampler := newGuaranteedThroughputProbabilisticSampler(s.lowerBound, s.defaultSampler.SamplingRate())
+	s.samplers[operation] = newSampler
+	return newSampler
+}
+
+// Close invokes Close on all underlying samplers.
+func (s *PerOperationSampler) Close() {
+	s.Lock()
+	defer s.Unlock()
+	for _, sampler := range s.samplers {
+		sampler.Close()
+	}
+	s.defaultSampler.Close()
+}
+
+func (s *PerOperationSampler) String() string {
+	var sb strings.Builder
+
+	fmt.Fprintf(&sb, "PerOperationSampler(defaultSampler=%v, ", s.defaultSampler)
+	fmt.Fprintf(&sb, "lowerBound=%f, ", s.lowerBound)
+	fmt.Fprintf(&sb, "maxOperations=%d, ", s.maxOperations)
+	fmt.Fprintf(&sb, "operationNameLateBinding=%t, ", s.operationNameLateBinding)
+	fmt.Fprintf(&sb, "numOperations=%d,\n", len(s.samplers))
+	fmt.Fprintf(&sb, "samplers=[")
+	for operationName, sampler := range s.samplers {
+		fmt.Fprintf(&sb, "\n(operationName=%s, sampler=%v)", operationName, sampler)
+	}
+	fmt.Fprintf(&sb, "])")
+
+	return sb.String()
+}
+
+// Equal is not used.
+// TODO (breaking change) remove this in the future
+func (s *PerOperationSampler) Equal(other Sampler) bool {
+	// NB The Equal() function is overly expensive for PerOperationSampler since it's composed of multiple
+	// samplers which all need to be initialized before this function can be called for a comparison.
+	// Therefore, PerOperationSampler uses the update() function to only alter the samplers that need
+	// changing. Hence this function always returns false so that the update function can be called.
+	// Once the Equal() function is removed from the Sampler API, this will no longer be needed.
+	return false
+}
+
+func (s *PerOperationSampler) update(strategies *sampling.PerOperationSamplingStrategies) {
+	s.Lock()
+	defer s.Unlock()
+	newSamplers := map[string]*GuaranteedThroughputProbabilisticSampler{}
+	for _, strategy := range strategies.PerOperationStrategies {
+		operation := strategy.Operation
+		samplingRate := strategy.ProbabilisticSampling.SamplingRate
+		lowerBound := strategies.DefaultLowerBoundTracesPerSecond
+		if sampler, ok := s.samplers[operation]; ok {
+			sampler.update(lowerBound, samplingRate)
+			newSamplers[operation] = sampler
+		} else {
+			sampler := newGuaranteedThroughputProbabilisticSampler(
+				lowerBound,
+				samplingRate,
+			)
+			newSamplers[operation] = sampler
+		}
+	}
+	s.lowerBound = strategies.DefaultLowerBoundTracesPerSecond
+	if s.defaultSampler.SamplingRate() != strategies.DefaultSamplingProbability {
+		s.defaultSampler = newProbabilisticSampler(strategies.DefaultSamplingProbability)
+	}
+	s.samplers = newSamplers
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler_remote.go b/vendor/github.com/uber/jaeger-client-go/sampler_remote.go
new file mode 100644
index 0000000..119f0a1
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/sampler_remote.go
@@ -0,0 +1,358 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/uber/jaeger-client-go/log"
+	"github.com/uber/jaeger-client-go/thrift-gen/sampling"
+)
+
+const (
+	defaultRemoteSamplingTimeout   = 10 * time.Second
+	defaultSamplingRefreshInterval = time.Minute
+)
+
+// SamplingStrategyFetcher is used to fetch sampling strategy updates from remote server.
+type SamplingStrategyFetcher interface {
+	Fetch(service string) ([]byte, error)
+}
+
+// SamplingStrategyParser is used to parse sampling strategy updates. The output object
+// should be of the type that is recognized by the SamplerUpdaters.
+type SamplingStrategyParser interface {
+	Parse(response []byte) (interface{}, error)
+}
+
+// SamplerUpdater is used by RemotelyControlledSampler to apply sampling strategies,
+// retrieved from remote config server, to the current sampler. The updater can modify
+// the sampler in-place if sampler supports it, or create a new one.
+//
+// If the strategy does not contain configuration for the sampler in question,
+// updater must return modifiedSampler=nil to give other updaters a chance to inspect
+// the sampling strategy response.
+//
+// RemotelyControlledSampler invokes the updaters while holding a lock on the main sampler.
+type SamplerUpdater interface {
+	Update(sampler SamplerV2, strategy interface{}) (modified SamplerV2, err error)
+}
+
+// RemotelyControlledSampler is a delegating sampler that polls a remote server
+// for the appropriate sampling strategy, constructs a corresponding sampler and
+// delegates to it for sampling decisions.
+type RemotelyControlledSampler struct {
+	// These fields must be first in the struct because `sync/atomic` expects 64-bit alignment.
+	// Cf. https://github.com/uber/jaeger-client-go/issues/155, https://goo.gl/zW7dgq
+	closed int64 // 0 - not closed, 1 - closed
+
+	sync.RWMutex // used to serialize access to samplerOptions.sampler
+	samplerOptions
+
+	serviceName string
+	doneChan    chan *sync.WaitGroup
+}
+
+// NewRemotelyControlledSampler creates a sampler that periodically pulls
+// the sampling strategy from an HTTP sampling server (e.g. jaeger-agent).
+func NewRemotelyControlledSampler(
+	serviceName string,
+	opts ...SamplerOption,
+) *RemotelyControlledSampler {
+	options := new(samplerOptions).applyOptionsAndDefaults(opts...)
+	sampler := &RemotelyControlledSampler{
+		samplerOptions: *options,
+		serviceName:    serviceName,
+		doneChan:       make(chan *sync.WaitGroup),
+	}
+	go sampler.pollController()
+	return sampler
+}
+
+// IsSampled implements IsSampled() of Sampler.
+// TODO (breaking change) remove when Sampler V1 is removed
+func (s *RemotelyControlledSampler) IsSampled(id TraceID, operation string) (bool, []Tag) {
+	return false, nil
+}
+
+// OnCreateSpan implements OnCreateSpan of SamplerV2.
+func (s *RemotelyControlledSampler) OnCreateSpan(span *Span) SamplingDecision {
+	s.RLock()
+	defer s.RUnlock()
+	return s.sampler.OnCreateSpan(span)
+}
+
+// OnSetOperationName implements OnSetOperationName of SamplerV2.
+func (s *RemotelyControlledSampler) OnSetOperationName(span *Span, operationName string) SamplingDecision {
+	s.RLock()
+	defer s.RUnlock()
+	return s.sampler.OnSetOperationName(span, operationName)
+}
+
+// OnSetTag implements OnSetTag of SamplerV2.
+func (s *RemotelyControlledSampler) OnSetTag(span *Span, key string, value interface{}) SamplingDecision {
+	s.RLock()
+	defer s.RUnlock()
+	return s.sampler.OnSetTag(span, key, value)
+}
+
+// OnFinishSpan implements OnFinishSpan of SamplerV2.
+func (s *RemotelyControlledSampler) OnFinishSpan(span *Span) SamplingDecision {
+	s.RLock()
+	defer s.RUnlock()
+	return s.sampler.OnFinishSpan(span)
+}
+
+// Close implements Close() of Sampler.
+func (s *RemotelyControlledSampler) Close() {
+	if swapped := atomic.CompareAndSwapInt64(&s.closed, 0, 1); !swapped {
+		s.logger.Error("Repeated attempt to close the sampler is ignored")
+		return
+	}
+
+	var wg sync.WaitGroup
+	wg.Add(1)
+	s.doneChan <- &wg
+	wg.Wait()
+}
+
+// Equal implements Equal() of Sampler.
+func (s *RemotelyControlledSampler) Equal(other Sampler) bool {
+	// NB The Equal() function is expensive and will be removed. See PerOperationSampler.Equal() for
+	// more information.
+	return false
+}
+
+func (s *RemotelyControlledSampler) pollController() {
+	ticker := time.NewTicker(s.samplingRefreshInterval)
+	defer ticker.Stop()
+	s.pollControllerWithTicker(ticker)
+}
+
+func (s *RemotelyControlledSampler) pollControllerWithTicker(ticker *time.Ticker) {
+	for {
+		select {
+		case <-ticker.C:
+			s.UpdateSampler()
+		case wg := <-s.doneChan:
+			wg.Done()
+			return
+		}
+	}
+}
+
+// Sampler returns the currently active sampler.
+func (s *RemotelyControlledSampler) Sampler() SamplerV2 {
+	s.RLock()
+	defer s.RUnlock()
+	return s.sampler
+}
+func (s *RemotelyControlledSampler) setSampler(sampler SamplerV2) {
+	s.Lock()
+	defer s.Unlock()
+	s.sampler = sampler
+}
+
+// UpdateSampler forces the sampler to fetch sampling strategy from backend server.
+// This function is called automatically on a timer, but can also be safely called manually, e.g. from tests.
+func (s *RemotelyControlledSampler) UpdateSampler() {
+	res, err := s.samplingFetcher.Fetch(s.serviceName)
+	if err != nil {
+		s.metrics.SamplerQueryFailure.Inc(1)
+		s.logger.Infof("failed to fetch sampling strategy: %v", err)
+		return
+	}
+	strategy, err := s.samplingParser.Parse(res)
+	if err != nil {
+		s.metrics.SamplerUpdateFailure.Inc(1)
+		s.logger.Infof("failed to parse sampling strategy response: %v", err)
+		return
+	}
+
+	s.Lock()
+	defer s.Unlock()
+
+	s.metrics.SamplerRetrieved.Inc(1)
+	if err := s.updateSamplerViaUpdaters(strategy); err != nil {
+		s.metrics.SamplerUpdateFailure.Inc(1)
+		s.logger.Infof("failed to handle sampling strategy response %+v. Got error: %v", res, err)
+		return
+	}
+	s.metrics.SamplerUpdated.Inc(1)
+}
+
+// NB: this function should only be called while holding a Write lock
+func (s *RemotelyControlledSampler) updateSamplerViaUpdaters(strategy interface{}) error {
+	for _, updater := range s.updaters {
+		sampler, err := updater.Update(s.sampler, strategy)
+		if err != nil {
+			return err
+		}
+		if sampler != nil {
+			s.logger.Debugf("sampler updated: %+v", sampler)
+			s.sampler = sampler
+			return nil
+		}
+	}
+	return fmt.Errorf("unsupported sampling strategy %+v", strategy)
+}
+
+// -----------------------
+
+// ProbabilisticSamplerUpdater is used by RemotelyControlledSampler to parse sampling configuration.
+type ProbabilisticSamplerUpdater struct{}
+
+// Update implements Update of SamplerUpdater.
+func (u *ProbabilisticSamplerUpdater) Update(sampler SamplerV2, strategy interface{}) (SamplerV2, error) {
+	type response interface {
+		GetProbabilisticSampling() *sampling.ProbabilisticSamplingStrategy
+	}
+	var _ response = new(sampling.SamplingStrategyResponse) // sanity signature check
+	if resp, ok := strategy.(response); ok {
+		if probabilistic := resp.GetProbabilisticSampling(); probabilistic != nil {
+			if ps, ok := sampler.(*ProbabilisticSampler); ok {
+				if err := ps.Update(probabilistic.SamplingRate); err != nil {
+					return nil, err
+				}
+				return sampler, nil
+			}
+			return newProbabilisticSampler(probabilistic.SamplingRate), nil
+		}
+	}
+	return nil, nil
+}
+
+// -----------------------
+
+// RateLimitingSamplerUpdater is used by RemotelyControlledSampler to parse sampling configuration.
+type RateLimitingSamplerUpdater struct{}
+
+// Update implements Update of SamplerUpdater.
+func (u *RateLimitingSamplerUpdater) Update(sampler SamplerV2, strategy interface{}) (SamplerV2, error) {
+	type response interface {
+		GetRateLimitingSampling() *sampling.RateLimitingSamplingStrategy
+	}
+	var _ response = new(sampling.SamplingStrategyResponse) // sanity signature check
+	if resp, ok := strategy.(response); ok {
+		if rateLimiting := resp.GetRateLimitingSampling(); rateLimiting != nil {
+			rateLimit := float64(rateLimiting.MaxTracesPerSecond)
+			if rl, ok := sampler.(*RateLimitingSampler); ok {
+				rl.Update(rateLimit)
+				return rl, nil
+			}
+			return NewRateLimitingSampler(rateLimit), nil
+		}
+	}
+	return nil, nil
+}
+
+// -----------------------
+
+// AdaptiveSamplerUpdater is used by RemotelyControlledSampler to parse sampling configuration.
+// Fields have the same meaning as in PerOperationSamplerParams.
+type AdaptiveSamplerUpdater struct {
+	MaxOperations            int
+	OperationNameLateBinding bool
+}
+
+// Update implements Update of SamplerUpdater.
+func (u *AdaptiveSamplerUpdater) Update(sampler SamplerV2, strategy interface{}) (SamplerV2, error) {
+	type response interface {
+		GetOperationSampling() *sampling.PerOperationSamplingStrategies
+	}
+	var _ response = new(sampling.SamplingStrategyResponse) // sanity signature check
+	if p, ok := strategy.(response); ok {
+		if operations := p.GetOperationSampling(); operations != nil {
+			if as, ok := sampler.(*PerOperationSampler); ok {
+				as.update(operations)
+				return as, nil
+			}
+			return NewPerOperationSampler(PerOperationSamplerParams{
+				MaxOperations:            u.MaxOperations,
+				OperationNameLateBinding: u.OperationNameLateBinding,
+				Strategies:               operations,
+			}), nil
+		}
+	}
+	return nil, nil
+}
+
+// -----------------------
+
+type httpSamplingStrategyFetcher struct {
+	serverURL  string
+	logger     log.DebugLogger
+	httpClient http.Client
+}
+
+func newHTTPSamplingStrategyFetcher(serverURL string, logger log.DebugLogger) *httpSamplingStrategyFetcher {
+	customTransport := http.DefaultTransport.(*http.Transport).Clone()
+	customTransport.ResponseHeaderTimeout = defaultRemoteSamplingTimeout
+
+	return &httpSamplingStrategyFetcher{
+		serverURL: serverURL,
+		logger:    logger,
+		httpClient: http.Client{
+			Transport: customTransport,
+		},
+	}
+}
+
+func (f *httpSamplingStrategyFetcher) Fetch(serviceName string) ([]byte, error) {
+	v := url.Values{}
+	v.Set("service", serviceName)
+	uri := f.serverURL + "?" + v.Encode()
+
+	resp, err := f.httpClient.Get(uri)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() {
+		if err := resp.Body.Close(); err != nil {
+			f.logger.Error(fmt.Sprintf("failed to close HTTP response body: %+v", err))
+		}
+	}()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode >= 400 {
+		return nil, fmt.Errorf("StatusCode: %d, Body: %s", resp.StatusCode, body)
+	}
+
+	return body, nil
+}
+
+// -----------------------
+
+type samplingStrategyParser struct{}
+
+func (p *samplingStrategyParser) Parse(response []byte) (interface{}, error) {
+	strategy := new(sampling.SamplingStrategyResponse)
+	if err := json.Unmarshal(response, strategy); err != nil {
+		return nil, err
+	}
+	return strategy, nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler_remote_options.go b/vendor/github.com/uber/jaeger-client-go/sampler_remote_options.go
new file mode 100644
index 0000000..64b028b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/sampler_remote_options.go
@@ -0,0 +1,159 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"time"
+
+	"github.com/uber/jaeger-client-go/log"
+)
+
+// SamplerOption is a function that sets some option on the sampler
+type SamplerOption func(options *samplerOptions)
+
+// SamplerOptions is a factory for all available SamplerOption's.
+var SamplerOptions SamplerOptionsFactory
+
+// SamplerOptionsFactory is a factory for all available SamplerOption's.
+// The type acts as a namespace for factory functions. It is public to
+// make the functions discoverable via godoc. Recommended to be used
+// via global SamplerOptions variable.
+type SamplerOptionsFactory struct{}
+
+type samplerOptions struct {
+	metrics                 *Metrics
+	sampler                 SamplerV2
+	logger                  log.DebugLogger
+	samplingServerURL       string
+	samplingRefreshInterval time.Duration
+	samplingFetcher         SamplingStrategyFetcher
+	samplingParser          SamplingStrategyParser
+	updaters                []SamplerUpdater
+	posParams               PerOperationSamplerParams
+}
+
+// Metrics creates a SamplerOption that initializes Metrics on the sampler,
+// which is used to emit statistics.
+func (SamplerOptionsFactory) Metrics(m *Metrics) SamplerOption {
+	return func(o *samplerOptions) {
+		o.metrics = m
+	}
+}
+
+// MaxOperations creates a SamplerOption that sets the maximum number of
+// operations the sampler will keep track of.
+func (SamplerOptionsFactory) MaxOperations(maxOperations int) SamplerOption {
+	return func(o *samplerOptions) {
+		o.posParams.MaxOperations = maxOperations
+	}
+}
+
+// OperationNameLateBinding creates a SamplerOption that sets the respective
+// field in the PerOperationSamplerParams.
+func (SamplerOptionsFactory) OperationNameLateBinding(enable bool) SamplerOption {
+	return func(o *samplerOptions) {
+		o.posParams.OperationNameLateBinding = enable
+	}
+}
+
+// InitialSampler creates a SamplerOption that sets the initial sampler
+// to use before a remote sampler is created and used.
+func (SamplerOptionsFactory) InitialSampler(sampler Sampler) SamplerOption {
+	return func(o *samplerOptions) {
+		o.sampler = samplerV1toV2(sampler)
+	}
+}
+
+// Logger creates a SamplerOption that sets the logger used by the sampler.
+func (SamplerOptionsFactory) Logger(logger Logger) SamplerOption {
+	return func(o *samplerOptions) {
+		o.logger = log.DebugLogAdapter(logger)
+	}
+}
+
+// SamplingServerURL creates a SamplerOption that sets the sampling server url
+// of the local agent that contains the sampling strategies.
+func (SamplerOptionsFactory) SamplingServerURL(samplingServerURL string) SamplerOption {
+	return func(o *samplerOptions) {
+		o.samplingServerURL = samplingServerURL
+	}
+}
+
+// SamplingRefreshInterval creates a SamplerOption that sets how often the
+// sampler will poll local agent for the appropriate sampling strategy.
+func (SamplerOptionsFactory) SamplingRefreshInterval(samplingRefreshInterval time.Duration) SamplerOption {
+	return func(o *samplerOptions) {
+		o.samplingRefreshInterval = samplingRefreshInterval
+	}
+}
+
+// SamplingStrategyFetcher creates a SamplerOption that initializes sampling strategy fetcher.
+func (SamplerOptionsFactory) SamplingStrategyFetcher(fetcher SamplingStrategyFetcher) SamplerOption {
+	return func(o *samplerOptions) {
+		o.samplingFetcher = fetcher
+	}
+}
+
+// SamplingStrategyParser creates a SamplerOption that initializes sampling strategy parser.
+func (SamplerOptionsFactory) SamplingStrategyParser(parser SamplingStrategyParser) SamplerOption {
+	return func(o *samplerOptions) {
+		o.samplingParser = parser
+	}
+}
+
+// Updaters creates a SamplerOption that initializes sampler updaters.
+func (SamplerOptionsFactory) Updaters(updaters ...SamplerUpdater) SamplerOption {
+	return func(o *samplerOptions) {
+		o.updaters = updaters
+	}
+}
+
+func (o *samplerOptions) applyOptionsAndDefaults(opts ...SamplerOption) *samplerOptions {
+	for _, option := range opts {
+		option(o)
+	}
+	if o.sampler == nil {
+		o.sampler = newProbabilisticSampler(0.001)
+	}
+	if o.logger == nil {
+		o.logger = log.NullLogger
+	}
+	if o.samplingServerURL == "" {
+		o.samplingServerURL = DefaultSamplingServerURL
+	}
+	if o.metrics == nil {
+		o.metrics = NewNullMetrics()
+	}
+	if o.samplingRefreshInterval <= 0 {
+		o.samplingRefreshInterval = defaultSamplingRefreshInterval
+	}
+	if o.samplingFetcher == nil {
+		o.samplingFetcher = newHTTPSamplingStrategyFetcher(o.samplingServerURL, o.logger)
+	}
+	if o.samplingParser == nil {
+		o.samplingParser = new(samplingStrategyParser)
+	}
+	if o.updaters == nil {
+		o.updaters = []SamplerUpdater{
+			&AdaptiveSamplerUpdater{
+				MaxOperations:            o.posParams.MaxOperations,
+				OperationNameLateBinding: o.posParams.OperationNameLateBinding,
+			},
+			new(ProbabilisticSamplerUpdater),
+			new(RateLimitingSamplerUpdater),
+		}
+	}
+	return o
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/sampler_v2.go b/vendor/github.com/uber/jaeger-client-go/sampler_v2.go
new file mode 100644
index 0000000..a50671a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/sampler_v2.go
@@ -0,0 +1,93 @@
+// Copyright (c) 2019 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+// SamplingDecision is returned by the V2 samplers.
+type SamplingDecision struct {
+	Sample    bool
+	Retryable bool
+	Tags      []Tag
+}
+
+// SamplerV2 is an extension of the V1 samplers that allows sampling decisions
+// be made at different points of the span lifecycle.
+type SamplerV2 interface {
+	OnCreateSpan(span *Span) SamplingDecision
+	OnSetOperationName(span *Span, operationName string) SamplingDecision
+	OnSetTag(span *Span, key string, value interface{}) SamplingDecision
+	OnFinishSpan(span *Span) SamplingDecision
+
+	// Close does a clean shutdown of the sampler, stopping any background
+	// go-routines it may have started.
+	Close()
+}
+
+// samplerV1toV2 wraps legacy V1 sampler into an adapter that make it look like V2.
+func samplerV1toV2(s Sampler) SamplerV2 {
+	if s2, ok := s.(SamplerV2); ok {
+		return s2
+	}
+	type legacySamplerV1toV2Adapter struct {
+		legacySamplerV1Base
+	}
+	return &legacySamplerV1toV2Adapter{
+		legacySamplerV1Base: legacySamplerV1Base{
+			delegate: s.IsSampled,
+		},
+	}
+}
+
+// SamplerV2Base can be used by V2 samplers to implement dummy V1 methods.
+// Supporting V1 API is required because Tracer configuration only accepts V1 Sampler
+// for backwards compatibility reasons.
+// TODO (breaking change) remove this in the next major release
+type SamplerV2Base struct{}
+
+// IsSampled implements IsSampled of Sampler.
+func (SamplerV2Base) IsSampled(id TraceID, operation string) (sampled bool, tags []Tag) {
+	return false, nil
+}
+
+// Close implements Close of Sampler.
+func (SamplerV2Base) Close() {}
+
+// Equal implements Equal of Sampler.
+func (SamplerV2Base) Equal(other Sampler) bool { return false }
+
+// legacySamplerV1Base is used as a base for simple samplers that only implement
+// the legacy isSampled() function that is not sensitive to its arguments.
+type legacySamplerV1Base struct {
+	delegate func(id TraceID, operation string) (sampled bool, tags []Tag)
+}
+
+func (s *legacySamplerV1Base) OnCreateSpan(span *Span) SamplingDecision {
+	isSampled, tags := s.delegate(span.context.traceID, span.operationName)
+	return SamplingDecision{Sample: isSampled, Retryable: false, Tags: tags}
+}
+
+func (s *legacySamplerV1Base) OnSetOperationName(span *Span, operationName string) SamplingDecision {
+	isSampled, tags := s.delegate(span.context.traceID, span.operationName)
+	return SamplingDecision{Sample: isSampled, Retryable: false, Tags: tags}
+}
+
+func (s *legacySamplerV1Base) OnSetTag(span *Span, key string, value interface{}) SamplingDecision {
+	return SamplingDecision{Sample: false, Retryable: true}
+}
+
+func (s *legacySamplerV1Base) OnFinishSpan(span *Span) SamplingDecision {
+	return SamplingDecision{Sample: false, Retryable: true}
+}
+
+func (s *legacySamplerV1Base) Close() {}
diff --git a/vendor/github.com/uber/jaeger-client-go/span.go b/vendor/github.com/uber/jaeger-client-go/span.go
new file mode 100644
index 0000000..997cffd
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/span.go
@@ -0,0 +1,503 @@
+// Copyright (c) 2017-2018 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+	"github.com/opentracing/opentracing-go/log"
+)
+
+// Span implements opentracing.Span
+type Span struct {
+	// referenceCounter used to increase the lifetime of
+	// the object before return it into the pool.
+	referenceCounter int32
+
+	sync.RWMutex
+
+	tracer *Tracer
+
+	// TODO: (breaking change) change to use a pointer
+	context SpanContext
+
+	// The name of the "operation" this span is an instance of.
+	// Known as a "span name" in some implementations.
+	operationName string
+
+	// firstInProcess, if true, indicates that this span is the root of the (sub)tree
+	// of spans in the current process. In other words it's true for the root spans,
+	// and the ingress spans when the process joins another trace.
+	firstInProcess bool
+
+	// startTime is the timestamp indicating when the span began, with microseconds precision.
+	startTime time.Time
+
+	// duration returns duration of the span with microseconds precision.
+	// Zero value means duration is unknown.
+	duration time.Duration
+
+	// tags attached to this span
+	tags []Tag
+
+	// The span's "micro-log"
+	logs []opentracing.LogRecord
+
+	// The number of logs dropped because of MaxLogsPerSpan.
+	numDroppedLogs int
+
+	// references for this span
+	references []Reference
+
+	observer ContribSpanObserver
+}
+
+// Tag is a simple key value wrapper.
+// TODO (breaking change) deprecate in the next major release, use opentracing.Tag instead.
+type Tag struct {
+	key   string
+	value interface{}
+}
+
+// NewTag creates a new Tag.
+// TODO (breaking change) deprecate in the next major release, use opentracing.Tag instead.
+func NewTag(key string, value interface{}) Tag {
+	return Tag{key: key, value: value}
+}
+
+// SetOperationName sets or changes the operation name.
+func (s *Span) SetOperationName(operationName string) opentracing.Span {
+	s.Lock()
+	s.operationName = operationName
+	ctx := s.context
+	s.Unlock()
+	if !ctx.isSamplingFinalized() {
+		decision := s.tracer.sampler.OnSetOperationName(s, operationName)
+		s.applySamplingDecision(decision, true)
+	}
+	s.observer.OnSetOperationName(operationName)
+	return s
+}
+
+// SetTag implements SetTag() of opentracing.Span
+func (s *Span) SetTag(key string, value interface{}) opentracing.Span {
+	return s.setTagInternal(key, value, true)
+}
+
+func (s *Span) setTagInternal(key string, value interface{}, lock bool) opentracing.Span {
+	var ctx SpanContext
+	var operationName string
+	if lock {
+		ctx = s.SpanContext()
+		operationName = s.OperationName()
+	} else {
+		ctx = s.context
+		operationName = s.operationName
+	}
+
+	s.observer.OnSetTag(key, value)
+	if key == string(ext.SamplingPriority) && !setSamplingPriority(ctx.samplingState, operationName, s.tracer, value) {
+		return s
+	}
+	if !ctx.isSamplingFinalized() {
+		decision := s.tracer.sampler.OnSetTag(s, key, value)
+		s.applySamplingDecision(decision, lock)
+	}
+	if ctx.isWriteable() {
+		if lock {
+			s.Lock()
+			defer s.Unlock()
+		}
+		s.appendTagNoLocking(key, value)
+	}
+	return s
+}
+
+// SpanContext returns span context
+func (s *Span) SpanContext() SpanContext {
+	s.Lock()
+	defer s.Unlock()
+	return s.context
+}
+
+// StartTime returns span start time
+func (s *Span) StartTime() time.Time {
+	s.Lock()
+	defer s.Unlock()
+	return s.startTime
+}
+
+// Duration returns span duration
+func (s *Span) Duration() time.Duration {
+	s.Lock()
+	defer s.Unlock()
+	return s.duration
+}
+
+// Tags returns tags for span
+func (s *Span) Tags() opentracing.Tags {
+	s.Lock()
+	defer s.Unlock()
+	var result = make(opentracing.Tags, len(s.tags))
+	for _, tag := range s.tags {
+		result[tag.key] = tag.value
+	}
+	return result
+}
+
+// Logs returns micro logs for span
+func (s *Span) Logs() []opentracing.LogRecord {
+	s.Lock()
+	defer s.Unlock()
+
+	logs := append([]opentracing.LogRecord(nil), s.logs...)
+	if s.numDroppedLogs != 0 {
+		fixLogs(logs, s.numDroppedLogs)
+	}
+
+	return logs
+}
+
+// References returns references for this span
+func (s *Span) References() []opentracing.SpanReference {
+	s.Lock()
+	defer s.Unlock()
+
+	if s.references == nil || len(s.references) == 0 {
+		return nil
+	}
+
+	result := make([]opentracing.SpanReference, len(s.references))
+	for i, r := range s.references {
+		result[i] = opentracing.SpanReference{Type: r.Type, ReferencedContext: r.Context}
+	}
+	return result
+}
+
+func (s *Span) appendTagNoLocking(key string, value interface{}) {
+	s.tags = append(s.tags, Tag{key: key, value: value})
+}
+
+// LogFields implements opentracing.Span API
+func (s *Span) LogFields(fields ...log.Field) {
+	s.Lock()
+	defer s.Unlock()
+	if !s.context.IsSampled() {
+		return
+	}
+	s.logFieldsNoLocking(fields...)
+}
+
+// this function should only be called while holding a Write lock
+func (s *Span) logFieldsNoLocking(fields ...log.Field) {
+	lr := opentracing.LogRecord{
+		Fields:    fields,
+		Timestamp: time.Now(),
+	}
+	s.appendLogNoLocking(lr)
+}
+
+// LogKV implements opentracing.Span API
+func (s *Span) LogKV(alternatingKeyValues ...interface{}) {
+	s.RLock()
+	sampled := s.context.IsSampled()
+	s.RUnlock()
+	if !sampled {
+		return
+	}
+	fields, err := log.InterleavedKVToFields(alternatingKeyValues...)
+	if err != nil {
+		s.LogFields(log.Error(err), log.String("function", "LogKV"))
+		return
+	}
+	s.LogFields(fields...)
+}
+
+// LogEvent implements opentracing.Span API
+func (s *Span) LogEvent(event string) {
+	s.Log(opentracing.LogData{Event: event})
+}
+
+// LogEventWithPayload implements opentracing.Span API
+func (s *Span) LogEventWithPayload(event string, payload interface{}) {
+	s.Log(opentracing.LogData{Event: event, Payload: payload})
+}
+
+// Log implements opentracing.Span API
+func (s *Span) Log(ld opentracing.LogData) {
+	s.Lock()
+	defer s.Unlock()
+	if s.context.IsSampled() {
+		if ld.Timestamp.IsZero() {
+			ld.Timestamp = s.tracer.timeNow()
+		}
+		s.appendLogNoLocking(ld.ToLogRecord())
+	}
+}
+
+// this function should only be called while holding a Write lock
+func (s *Span) appendLogNoLocking(lr opentracing.LogRecord) {
+	maxLogs := s.tracer.options.maxLogsPerSpan
+	if maxLogs == 0 || len(s.logs) < maxLogs {
+		s.logs = append(s.logs, lr)
+		return
+	}
+
+	// We have too many logs. We don't touch the first numOld logs; we treat the
+	// rest as a circular buffer and overwrite the oldest log among those.
+	numOld := (maxLogs - 1) / 2
+	numNew := maxLogs - numOld
+	s.logs[numOld+s.numDroppedLogs%numNew] = lr
+	s.numDroppedLogs++
+}
+
+// rotateLogBuffer rotates the records in the buffer: records 0 to pos-1 move at
+// the end (i.e. pos circular left shifts).
+func rotateLogBuffer(buf []opentracing.LogRecord, pos int) {
+	// This algorithm is described in:
+	//    http://www.cplusplus.com/reference/algorithm/rotate
+	for first, middle, next := 0, pos, pos; first != middle; {
+		buf[first], buf[next] = buf[next], buf[first]
+		first++
+		next++
+		if next == len(buf) {
+			next = middle
+		} else if first == middle {
+			middle = next
+		}
+	}
+}
+
+func fixLogs(logs []opentracing.LogRecord, numDroppedLogs int) {
+	// We dropped some log events, which means that we used part of Logs as a
+	// circular buffer (see appendLog). De-circularize it.
+	numOld := (len(logs) - 1) / 2
+	numNew := len(logs) - numOld
+	rotateLogBuffer(logs[numOld:], numDroppedLogs%numNew)
+
+	// Replace the log in the middle (the oldest "new" log) with information
+	// about the dropped logs. This means that we are effectively dropping one
+	// more "new" log.
+	numDropped := numDroppedLogs + 1
+	logs[numOld] = opentracing.LogRecord{
+		// Keep the timestamp of the last dropped event.
+		Timestamp: logs[numOld].Timestamp,
+		Fields: []log.Field{
+			log.String("event", "dropped Span logs"),
+			log.Int("dropped_log_count", numDropped),
+			log.String("component", "jaeger-client"),
+		},
+	}
+}
+
+func (s *Span) fixLogsIfDropped() {
+	if s.numDroppedLogs == 0 {
+		return
+	}
+	fixLogs(s.logs, s.numDroppedLogs)
+	s.numDroppedLogs = 0
+}
+
+// SetBaggageItem implements SetBaggageItem() of opentracing.SpanContext.
+// The call is proxied via tracer.baggageSetter to allow policies to be applied
+// before allowing to set/replace baggage keys.
+// The setter eventually stores a new SpanContext with extended baggage:
+//
+//     span.context = span.context.WithBaggageItem(key, value)
+//
+//  See SpanContext.WithBaggageItem() for explanation why it's done this way.
+func (s *Span) SetBaggageItem(key, value string) opentracing.Span {
+	s.Lock()
+	defer s.Unlock()
+	s.tracer.setBaggage(s, key, value)
+	return s
+}
+
+// BaggageItem implements BaggageItem() of opentracing.SpanContext
+func (s *Span) BaggageItem(key string) string {
+	s.RLock()
+	defer s.RUnlock()
+	return s.context.baggage[key]
+}
+
+// Finish implements opentracing.Span API
+// After finishing the Span object it returns back to the allocator unless the reporter retains it again,
+// so after that, the Span object should no longer be used because it won't be valid anymore.
+func (s *Span) Finish() {
+	s.FinishWithOptions(opentracing.FinishOptions{})
+}
+
+// FinishWithOptions implements opentracing.Span API
+func (s *Span) FinishWithOptions(options opentracing.FinishOptions) {
+	if options.FinishTime.IsZero() {
+		options.FinishTime = s.tracer.timeNow()
+	}
+	s.observer.OnFinish(options)
+	s.Lock()
+	s.duration = options.FinishTime.Sub(s.startTime)
+	ctx := s.context
+	s.Unlock()
+	if !ctx.isSamplingFinalized() {
+		decision := s.tracer.sampler.OnFinishSpan(s)
+		s.applySamplingDecision(decision, true)
+	}
+	if ctx.IsSampled() {
+		s.Lock()
+		s.fixLogsIfDropped()
+		if len(options.LogRecords) > 0 || len(options.BulkLogData) > 0 {
+			// Note: bulk logs are not subject to maxLogsPerSpan limit
+			if options.LogRecords != nil {
+				s.logs = append(s.logs, options.LogRecords...)
+			}
+			for _, ld := range options.BulkLogData {
+				s.logs = append(s.logs, ld.ToLogRecord())
+			}
+		}
+		s.Unlock()
+	}
+	// call reportSpan even for non-sampled traces, to return span to the pool
+	// and update metrics counter
+	s.tracer.reportSpan(s)
+}
+
+// Context implements opentracing.Span API
+func (s *Span) Context() opentracing.SpanContext {
+	s.Lock()
+	defer s.Unlock()
+	return s.context
+}
+
+// Tracer implements opentracing.Span API
+func (s *Span) Tracer() opentracing.Tracer {
+	return s.tracer
+}
+
+func (s *Span) String() string {
+	s.RLock()
+	defer s.RUnlock()
+	return s.context.String()
+}
+
+// OperationName allows retrieving current operation name.
+func (s *Span) OperationName() string {
+	s.RLock()
+	defer s.RUnlock()
+	return s.operationName
+}
+
+// Retain increases object counter to increase the lifetime of the object
+func (s *Span) Retain() *Span {
+	atomic.AddInt32(&s.referenceCounter, 1)
+	return s
+}
+
+// Release decrements object counter and return to the
+// allocator manager  when counter will below zero
+func (s *Span) Release() {
+	if atomic.AddInt32(&s.referenceCounter, -1) == -1 {
+		s.tracer.spanAllocator.Put(s)
+	}
+}
+
+// reset span state and release unused data
+func (s *Span) reset() {
+	s.firstInProcess = false
+	s.context = emptyContext
+	s.operationName = ""
+	s.tracer = nil
+	s.startTime = time.Time{}
+	s.duration = 0
+	s.observer = nil
+	atomic.StoreInt32(&s.referenceCounter, 0)
+
+	// Note: To reuse memory we can save the pointers on the heap
+	s.tags = s.tags[:0]
+	s.logs = s.logs[:0]
+	s.numDroppedLogs = 0
+	s.references = s.references[:0]
+}
+
+func (s *Span) serviceName() string {
+	return s.tracer.serviceName
+}
+
+func (s *Span) applySamplingDecision(decision SamplingDecision, lock bool) {
+	var ctx SpanContext
+	if lock {
+		ctx = s.SpanContext()
+	} else {
+		ctx = s.context
+	}
+
+	if !decision.Retryable {
+		ctx.samplingState.setFinal()
+	}
+	if decision.Sample {
+		ctx.samplingState.setSampled()
+		if len(decision.Tags) > 0 {
+			if lock {
+				s.Lock()
+				defer s.Unlock()
+			}
+			for _, tag := range decision.Tags {
+				s.appendTagNoLocking(tag.key, tag.value)
+			}
+		}
+	}
+}
+
+// setSamplingPriority returns true if the flag was updated successfully, false otherwise.
+// The behavior of setSamplingPriority is surprising
+// If noDebugFlagOnForcedSampling is set
+//     setSamplingPriority(..., 1) always sets only flagSampled
+// If noDebugFlagOnForcedSampling is unset, and isDebugAllowed passes
+//     setSamplingPriority(..., 1) sets both flagSampled and flagDebug
+// However,
+//     setSamplingPriority(..., 0) always only resets flagSampled
+//
+// This means that doing a setSamplingPriority(..., 1) followed by setSamplingPriority(..., 0) can
+// leave flagDebug set
+func setSamplingPriority(state *samplingState, operationName string, tracer *Tracer, value interface{}) bool {
+	val, ok := value.(uint16)
+	if !ok {
+		return false
+	}
+	if val == 0 {
+		state.unsetSampled()
+		state.setFinal()
+		return true
+	}
+	if tracer.options.noDebugFlagOnForcedSampling {
+		state.setSampled()
+		state.setFinal()
+		return true
+	} else if tracer.isDebugAllowed(operationName) {
+		state.setDebugAndSampled()
+		state.setFinal()
+		return true
+	}
+	return false
+}
+
+// EnableFirehose enables firehose flag on the span context
+func EnableFirehose(s *Span) {
+	s.Lock()
+	defer s.Unlock()
+	s.context.samplingState.setFirehose()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/span_allocator.go b/vendor/github.com/uber/jaeger-client-go/span_allocator.go
new file mode 100644
index 0000000..6fe0cd0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/span_allocator.go
@@ -0,0 +1,56 @@
+// Copyright (c) 2019 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import "sync"
+
+// SpanAllocator abstraction of managign span allocations
+type SpanAllocator interface {
+	Get() *Span
+	Put(*Span)
+}
+
+type syncPollSpanAllocator struct {
+	spanPool sync.Pool
+}
+
+func newSyncPollSpanAllocator() SpanAllocator {
+	return &syncPollSpanAllocator{
+		spanPool: sync.Pool{New: func() interface{} {
+			return &Span{}
+		}},
+	}
+}
+
+func (pool *syncPollSpanAllocator) Get() *Span {
+	return pool.spanPool.Get().(*Span)
+}
+
+func (pool *syncPollSpanAllocator) Put(span *Span) {
+	span.reset()
+	pool.spanPool.Put(span)
+}
+
+type simpleSpanAllocator struct{}
+
+func (pool simpleSpanAllocator) Get() *Span {
+	return &Span{}
+}
+
+func (pool simpleSpanAllocator) Put(span *Span) {
+	// @comment https://github.com/jaegertracing/jaeger-client-go/pull/381#issuecomment-475904351
+	// since finished spans are not reused, no need to reset them
+	// span.reset()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/span_context.go b/vendor/github.com/uber/jaeger-client-go/span_context.go
new file mode 100644
index 0000000..5b2307b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/span_context.go
@@ -0,0 +1,418 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+	"sync"
+
+	"go.uber.org/atomic"
+)
+
+const (
+	flagSampled  = 1
+	flagDebug    = 2
+	flagFirehose = 8
+)
+
+var (
+	errEmptyTracerStateString     = errors.New("Cannot convert empty string to tracer state")
+	errMalformedTracerStateString = errors.New("String does not match tracer state format")
+
+	emptyContext = SpanContext{}
+)
+
+// TraceID represents unique 128bit identifier of a trace
+type TraceID struct {
+	High, Low uint64
+}
+
+// SpanID represents unique 64bit identifier of a span
+type SpanID uint64
+
+// SpanContext represents propagated span identity and state
+type SpanContext struct {
+	// traceID represents globally unique ID of the trace.
+	// Usually generated as a random number.
+	traceID TraceID
+
+	// spanID represents span ID that must be unique within its trace,
+	// but does not have to be globally unique.
+	spanID SpanID
+
+	// parentID refers to the ID of the parent span.
+	// Should be 0 if the current span is a root span.
+	parentID SpanID
+
+	// Distributed Context baggage. The is a snapshot in time.
+	baggage map[string]string
+
+	// debugID can be set to some correlation ID when the context is being
+	// extracted from a TextMap carrier.
+	//
+	// See JaegerDebugHeader in constants.go
+	debugID string
+
+	// samplingState is shared across all spans
+	samplingState *samplingState
+
+	// remote indicates that span context represents a remote parent
+	remote bool
+}
+
+type samplingState struct {
+	// Span context's state flags that are propagated across processes. Only lower 8 bits are used.
+	// We use an int32 instead of byte to be able to use CAS operations.
+	stateFlags atomic.Int32
+
+	// When state is not final, sampling will be retried on other span write operations,
+	// like SetOperationName / SetTag, and the spans will remain writable.
+	final atomic.Bool
+
+	// localRootSpan stores the SpanID of the first span created in this process for a given trace.
+	localRootSpan SpanID
+
+	// extendedState allows samplers to keep intermediate state.
+	// The keys and values in this map are completely opaque: interface{} -> interface{}.
+	extendedState sync.Map
+}
+
+func (s *samplingState) isLocalRootSpan(id SpanID) bool {
+	return id == s.localRootSpan
+}
+
+func (s *samplingState) setFlag(newFlag int32) {
+	swapped := false
+	for !swapped {
+		old := s.stateFlags.Load()
+		swapped = s.stateFlags.CAS(old, old|newFlag)
+	}
+}
+
+func (s *samplingState) unsetFlag(newFlag int32) {
+	swapped := false
+	for !swapped {
+		old := s.stateFlags.Load()
+		swapped = s.stateFlags.CAS(old, old&^newFlag)
+	}
+}
+
+func (s *samplingState) setSampled() {
+	s.setFlag(flagSampled)
+}
+
+func (s *samplingState) unsetSampled() {
+	s.unsetFlag(flagSampled)
+}
+
+func (s *samplingState) setDebugAndSampled() {
+	s.setFlag(flagDebug | flagSampled)
+}
+
+func (s *samplingState) setFirehose() {
+	s.setFlag(flagFirehose)
+}
+
+func (s *samplingState) setFlags(flags byte) {
+	s.stateFlags.Store(int32(flags))
+}
+
+func (s *samplingState) setFinal() {
+	s.final.Store(true)
+}
+
+func (s *samplingState) flags() byte {
+	return byte(s.stateFlags.Load())
+}
+
+func (s *samplingState) isSampled() bool {
+	return s.stateFlags.Load()&flagSampled == flagSampled
+}
+
+func (s *samplingState) isDebug() bool {
+	return s.stateFlags.Load()&flagDebug == flagDebug
+}
+
+func (s *samplingState) isFirehose() bool {
+	return s.stateFlags.Load()&flagFirehose == flagFirehose
+}
+
+func (s *samplingState) isFinal() bool {
+	return s.final.Load()
+}
+
+func (s *samplingState) extendedStateForKey(key interface{}, initValue func() interface{}) interface{} {
+	if value, ok := s.extendedState.Load(key); ok {
+		return value
+	}
+	value := initValue()
+	value, _ = s.extendedState.LoadOrStore(key, value)
+	return value
+}
+
+// ForeachBaggageItem implements ForeachBaggageItem() of opentracing.SpanContext
+func (c SpanContext) ForeachBaggageItem(handler func(k, v string) bool) {
+	for k, v := range c.baggage {
+		if !handler(k, v) {
+			break
+		}
+	}
+}
+
+// IsSampled returns whether this trace was chosen for permanent storage
+// by the sampling mechanism of the tracer.
+func (c SpanContext) IsSampled() bool {
+	return c.samplingState.isSampled()
+}
+
+// IsDebug indicates whether sampling was explicitly requested by the service.
+func (c SpanContext) IsDebug() bool {
+	return c.samplingState.isDebug()
+}
+
+// IsSamplingFinalized indicates whether the sampling decision has been finalized.
+func (c SpanContext) IsSamplingFinalized() bool {
+	return c.samplingState.isFinal()
+}
+
+// IsFirehose indicates whether the firehose flag was set
+func (c SpanContext) IsFirehose() bool {
+	return c.samplingState.isFirehose()
+}
+
+// ExtendedSamplingState returns the custom state object for a given key. If the value for this key does not exist,
+// it is initialized via initValue function. This state can be used by samplers (e.g. x.PrioritySampler).
+func (c SpanContext) ExtendedSamplingState(key interface{}, initValue func() interface{}) interface{} {
+	return c.samplingState.extendedStateForKey(key, initValue)
+}
+
+// IsValid indicates whether this context actually represents a valid trace.
+func (c SpanContext) IsValid() bool {
+	return c.traceID.IsValid() && c.spanID != 0
+}
+
+// SetFirehose enables firehose mode for this trace.
+func (c SpanContext) SetFirehose() {
+	c.samplingState.setFirehose()
+}
+
+func (c SpanContext) String() string {
+	var flags int32
+	if c.samplingState != nil {
+		flags = c.samplingState.stateFlags.Load()
+	}
+	if c.traceID.High == 0 {
+		return fmt.Sprintf("%016x:%016x:%016x:%x", c.traceID.Low, uint64(c.spanID), uint64(c.parentID), flags)
+	}
+	return fmt.Sprintf("%016x%016x:%016x:%016x:%x", c.traceID.High, c.traceID.Low, uint64(c.spanID), uint64(c.parentID), flags)
+}
+
+// ContextFromString reconstructs the Context encoded in a string
+func ContextFromString(value string) (SpanContext, error) {
+	var context SpanContext
+	if value == "" {
+		return emptyContext, errEmptyTracerStateString
+	}
+	parts := strings.Split(value, ":")
+	if len(parts) != 4 {
+		return emptyContext, errMalformedTracerStateString
+	}
+	var err error
+	if context.traceID, err = TraceIDFromString(parts[0]); err != nil {
+		return emptyContext, err
+	}
+	if context.spanID, err = SpanIDFromString(parts[1]); err != nil {
+		return emptyContext, err
+	}
+	if context.parentID, err = SpanIDFromString(parts[2]); err != nil {
+		return emptyContext, err
+	}
+	flags, err := strconv.ParseUint(parts[3], 10, 8)
+	if err != nil {
+		return emptyContext, err
+	}
+	context.samplingState = &samplingState{}
+	context.samplingState.setFlags(byte(flags))
+	return context, nil
+}
+
+// TraceID returns the trace ID of this span context
+func (c SpanContext) TraceID() TraceID {
+	return c.traceID
+}
+
+// SpanID returns the span ID of this span context
+func (c SpanContext) SpanID() SpanID {
+	return c.spanID
+}
+
+// ParentID returns the parent span ID of this span context
+func (c SpanContext) ParentID() SpanID {
+	return c.parentID
+}
+
+// Flags returns the bitmap containing such bits as 'sampled' and 'debug'.
+func (c SpanContext) Flags() byte {
+	return c.samplingState.flags()
+}
+
+// Span can be written to if it is sampled or the sampling decision has not been finalized.
+func (c SpanContext) isWriteable() bool {
+	state := c.samplingState
+	return !state.isFinal() || state.isSampled()
+}
+
+func (c SpanContext) isSamplingFinalized() bool {
+	return c.samplingState.isFinal()
+}
+
+// NewSpanContext creates a new instance of SpanContext
+func NewSpanContext(traceID TraceID, spanID, parentID SpanID, sampled bool, baggage map[string]string) SpanContext {
+	samplingState := &samplingState{}
+	if sampled {
+		samplingState.setSampled()
+	}
+
+	return SpanContext{
+		traceID:       traceID,
+		spanID:        spanID,
+		parentID:      parentID,
+		samplingState: samplingState,
+		baggage:       baggage}
+}
+
+// CopyFrom copies data from ctx into this context, including span identity and baggage.
+// TODO This is only used by interop.go. Remove once TChannel Go supports OpenTracing.
+func (c *SpanContext) CopyFrom(ctx *SpanContext) {
+	c.traceID = ctx.traceID
+	c.spanID = ctx.spanID
+	c.parentID = ctx.parentID
+	c.samplingState = ctx.samplingState
+	if l := len(ctx.baggage); l > 0 {
+		c.baggage = make(map[string]string, l)
+		for k, v := range ctx.baggage {
+			c.baggage[k] = v
+		}
+	} else {
+		c.baggage = nil
+	}
+}
+
+// WithBaggageItem creates a new context with an extra baggage item.
+// Delete a baggage item if provided blank value.
+//
+// The SpanContext is designed to be immutable and passed by value. As such,
+// it cannot contain any locks, and should only hold immutable data, including baggage.
+// Another reason for why baggage is immutable is when the span context is passed
+// as a parent when starting a new span. The new span's baggage cannot affect the parent
+// span's baggage, so the child span either needs to take a copy of the parent baggage
+// (which is expensive and unnecessary since baggage rarely changes in the life span of
+// a trace), or it needs to do a copy-on-write, which is the approach taken here.
+func (c SpanContext) WithBaggageItem(key, value string) SpanContext {
+	var newBaggage map[string]string
+	// unset baggage item
+	if value == "" {
+		if _, ok := c.baggage[key]; !ok {
+			return c
+		}
+		newBaggage = make(map[string]string, len(c.baggage))
+		for k, v := range c.baggage {
+			newBaggage[k] = v
+		}
+		delete(newBaggage, key)
+		return SpanContext{c.traceID, c.spanID, c.parentID, newBaggage, "", c.samplingState, c.remote}
+	}
+	if c.baggage == nil {
+		newBaggage = map[string]string{key: value}
+	} else {
+		newBaggage = make(map[string]string, len(c.baggage)+1)
+		for k, v := range c.baggage {
+			newBaggage[k] = v
+		}
+		newBaggage[key] = value
+	}
+	// Use positional parameters so the compiler will help catch new fields.
+	return SpanContext{c.traceID, c.spanID, c.parentID, newBaggage, "", c.samplingState, c.remote}
+}
+
+// isDebugIDContainerOnly returns true when the instance of the context is only
+// used to return the debug/correlation ID from extract() method. This happens
+// in the situation when "jaeger-debug-id" header is passed in the carrier to
+// the extract() method, but the request otherwise has no span context in it.
+// Previously this would've returned opentracing.ErrSpanContextNotFound from the
+// extract method, but now it returns a dummy context with only debugID filled in.
+//
+// See JaegerDebugHeader in constants.go
+// See TextMapPropagator#Extract
+func (c *SpanContext) isDebugIDContainerOnly() bool {
+	return !c.traceID.IsValid() && c.debugID != ""
+}
+
+// ------- TraceID -------
+
+func (t TraceID) String() string {
+	if t.High == 0 {
+		return fmt.Sprintf("%016x", t.Low)
+	}
+	return fmt.Sprintf("%016x%016x", t.High, t.Low)
+}
+
+// TraceIDFromString creates a TraceID from a hexadecimal string
+func TraceIDFromString(s string) (TraceID, error) {
+	var hi, lo uint64
+	var err error
+	if len(s) > 32 {
+		return TraceID{}, fmt.Errorf("TraceID cannot be longer than 32 hex characters: %s", s)
+	} else if len(s) > 16 {
+		hiLen := len(s) - 16
+		if hi, err = strconv.ParseUint(s[0:hiLen], 16, 64); err != nil {
+			return TraceID{}, err
+		}
+		if lo, err = strconv.ParseUint(s[hiLen:], 16, 64); err != nil {
+			return TraceID{}, err
+		}
+	} else {
+		if lo, err = strconv.ParseUint(s, 16, 64); err != nil {
+			return TraceID{}, err
+		}
+	}
+	return TraceID{High: hi, Low: lo}, nil
+}
+
+// IsValid checks if the trace ID is valid, i.e. not zero.
+func (t TraceID) IsValid() bool {
+	return t.High != 0 || t.Low != 0
+}
+
+// ------- SpanID -------
+
+func (s SpanID) String() string {
+	return fmt.Sprintf("%016x", uint64(s))
+}
+
+// SpanIDFromString creates a SpanID from a hexadecimal string
+func SpanIDFromString(s string) (SpanID, error) {
+	if len(s) > 16 {
+		return SpanID(0), fmt.Errorf("SpanID cannot be longer than 16 hex characters: %s", s)
+	}
+	id, err := strconv.ParseUint(s, 16, 64)
+	if err != nil {
+		return SpanID(0), err
+	}
+	return SpanID(id), nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/GoUnusedProtection__.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/GoUnusedProtection__.go
new file mode 100644
index 0000000..54cd3b0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/GoUnusedProtection__.go
@@ -0,0 +1,6 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package agent
+
+var GoUnusedProtection__ int;
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent-consts.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent-consts.go
new file mode 100644
index 0000000..a0df507
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent-consts.go
@@ -0,0 +1,28 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package agent
+
+import(
+	"bytes"
+	"context"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+	"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+var _ = jaeger.GoUnusedProtection__
+var _ = zipkincore.GoUnusedProtection__
+
+func init() {
+}
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent.go
new file mode 100644
index 0000000..6472e84
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/agent/agent.go
@@ -0,0 +1,396 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package agent
+
+import(
+	"bytes"
+	"context"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+	"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+var _ = jaeger.GoUnusedProtection__
+var _ = zipkincore.GoUnusedProtection__
+type Agent interface {
+  // Parameters:
+  //  - Spans
+  EmitZipkinBatch(ctx context.Context, spans []*zipkincore.Span) (_err error)
+  // Parameters:
+  //  - Batch
+  EmitBatch(ctx context.Context, batch *jaeger.Batch) (_err error)
+}
+
+type AgentClient struct {
+  c thrift.TClient
+  meta thrift.ResponseMeta
+}
+
+func NewAgentClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *AgentClient {
+  return &AgentClient{
+    c: thrift.NewTStandardClient(f.GetProtocol(t), f.GetProtocol(t)),
+  }
+}
+
+func NewAgentClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *AgentClient {
+  return &AgentClient{
+    c: thrift.NewTStandardClient(iprot, oprot),
+  }
+}
+
+func NewAgentClient(c thrift.TClient) *AgentClient {
+  return &AgentClient{
+    c: c,
+  }
+}
+
+func (p *AgentClient) Client_() thrift.TClient {
+  return p.c
+}
+
+func (p *AgentClient) LastResponseMeta_() thrift.ResponseMeta {
+  return p.meta
+}
+
+func (p *AgentClient) SetLastResponseMeta_(meta thrift.ResponseMeta) {
+  p.meta = meta
+}
+
+// Parameters:
+//  - Spans
+func (p *AgentClient) EmitZipkinBatch(ctx context.Context, spans []*zipkincore.Span) (_err error) {
+  var _args0 AgentEmitZipkinBatchArgs
+  _args0.Spans = spans
+  p.SetLastResponseMeta_(thrift.ResponseMeta{})
+  if _, err := p.Client_().Call(ctx, "emitZipkinBatch", &_args0, nil); err != nil {
+    return err
+  }
+  return nil
+}
+
+// Parameters:
+//  - Batch
+func (p *AgentClient) EmitBatch(ctx context.Context, batch *jaeger.Batch) (_err error) {
+  var _args1 AgentEmitBatchArgs
+  _args1.Batch = batch
+  p.SetLastResponseMeta_(thrift.ResponseMeta{})
+  if _, err := p.Client_().Call(ctx, "emitBatch", &_args1, nil); err != nil {
+    return err
+  }
+  return nil
+}
+
+type AgentProcessor struct {
+  processorMap map[string]thrift.TProcessorFunction
+  handler Agent
+}
+
+func (p *AgentProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+  p.processorMap[key] = processor
+}
+
+func (p *AgentProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+  processor, ok = p.processorMap[key]
+  return processor, ok
+}
+
+func (p *AgentProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+  return p.processorMap
+}
+
+func NewAgentProcessor(handler Agent) *AgentProcessor {
+
+  self2 := &AgentProcessor{handler:handler, processorMap:make(map[string]thrift.TProcessorFunction)}
+  self2.processorMap["emitZipkinBatch"] = &agentProcessorEmitZipkinBatch{handler:handler}
+  self2.processorMap["emitBatch"] = &agentProcessorEmitBatch{handler:handler}
+return self2
+}
+
+func (p *AgentProcessor) Process(ctx context.Context, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  name, _, seqId, err2 := iprot.ReadMessageBegin(ctx)
+  if err2 != nil { return false, thrift.WrapTException(err2) }
+  if processor, ok := p.GetProcessorFunction(name); ok {
+    return processor.Process(ctx, seqId, iprot, oprot)
+  }
+  iprot.Skip(ctx, thrift.STRUCT)
+  iprot.ReadMessageEnd(ctx)
+  x3 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function " + name)
+  oprot.WriteMessageBegin(ctx, name, thrift.EXCEPTION, seqId)
+  x3.Write(ctx, oprot)
+  oprot.WriteMessageEnd(ctx)
+  oprot.Flush(ctx)
+  return false, x3
+
+}
+
+type agentProcessorEmitZipkinBatch struct {
+  handler Agent
+}
+
+func (p *agentProcessorEmitZipkinBatch) Process(ctx context.Context, seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  args := AgentEmitZipkinBatchArgs{}
+  var err2 error
+  if err2 = args.Read(ctx, iprot); err2 != nil {
+    iprot.ReadMessageEnd(ctx)
+    return false, thrift.WrapTException(err2)
+  }
+  iprot.ReadMessageEnd(ctx)
+
+  tickerCancel := func() {}
+  _ = tickerCancel
+
+  if err2 = p.handler.EmitZipkinBatch(ctx, args.Spans); err2 != nil {
+    tickerCancel()
+    return true, thrift.WrapTException(err2)
+  }
+  tickerCancel()
+  return true, nil
+}
+
+type agentProcessorEmitBatch struct {
+  handler Agent
+}
+
+func (p *agentProcessorEmitBatch) Process(ctx context.Context, seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  args := AgentEmitBatchArgs{}
+  var err2 error
+  if err2 = args.Read(ctx, iprot); err2 != nil {
+    iprot.ReadMessageEnd(ctx)
+    return false, thrift.WrapTException(err2)
+  }
+  iprot.ReadMessageEnd(ctx)
+
+  tickerCancel := func() {}
+  _ = tickerCancel
+
+  if err2 = p.handler.EmitBatch(ctx, args.Batch); err2 != nil {
+    tickerCancel()
+    return true, thrift.WrapTException(err2)
+  }
+  tickerCancel()
+  return true, nil
+}
+
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - Spans
+type AgentEmitZipkinBatchArgs struct {
+  Spans []*zipkincore.Span `thrift:"spans,1" db:"spans" json:"spans"`
+}
+
+func NewAgentEmitZipkinBatchArgs() *AgentEmitZipkinBatchArgs {
+  return &AgentEmitZipkinBatchArgs{}
+}
+
+
+func (p *AgentEmitZipkinBatchArgs) GetSpans() []*zipkincore.Span {
+  return p.Spans
+}
+func (p *AgentEmitZipkinBatchArgs) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *AgentEmitZipkinBatchArgs)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*zipkincore.Span, 0, size)
+  p.Spans =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem4 := &zipkincore.Span{}
+    if err := _elem4.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem4), err)
+    }
+    p.Spans = append(p.Spans, _elem4)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *AgentEmitZipkinBatchArgs) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "emitZipkinBatch_args"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *AgentEmitZipkinBatchArgs) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "spans", thrift.LIST, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:spans: ", p), err) }
+  if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Spans)); err != nil {
+    return thrift.PrependError("error writing list begin: ", err)
+  }
+  for _, v := range p.Spans {
+    if err := v.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+    }
+  }
+  if err := oprot.WriteListEnd(ctx); err != nil {
+    return thrift.PrependError("error writing list end: ", err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:spans: ", p), err) }
+  return err
+}
+
+func (p *AgentEmitZipkinBatchArgs) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("AgentEmitZipkinBatchArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Batch
+type AgentEmitBatchArgs struct {
+  Batch *jaeger.Batch `thrift:"batch,1" db:"batch" json:"batch"`
+}
+
+func NewAgentEmitBatchArgs() *AgentEmitBatchArgs {
+  return &AgentEmitBatchArgs{}
+}
+
+var AgentEmitBatchArgs_Batch_DEFAULT *jaeger.Batch
+func (p *AgentEmitBatchArgs) GetBatch() *jaeger.Batch {
+  if !p.IsSetBatch() {
+    return AgentEmitBatchArgs_Batch_DEFAULT
+  }
+return p.Batch
+}
+func (p *AgentEmitBatchArgs) IsSetBatch() bool {
+  return p.Batch != nil
+}
+
+func (p *AgentEmitBatchArgs) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *AgentEmitBatchArgs)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  p.Batch = &jaeger.Batch{}
+  if err := p.Batch.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Batch), err)
+  }
+  return nil
+}
+
+func (p *AgentEmitBatchArgs) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "emitBatch_args"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *AgentEmitBatchArgs) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "batch", thrift.STRUCT, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:batch: ", p), err) }
+  if err := p.Batch.Write(ctx, oprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Batch), err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:batch: ", p), err) }
+  return err
+}
+
+func (p *AgentEmitBatchArgs) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("AgentEmitBatchArgs(%+v)", *p)
+}
+
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/GoUnusedProtection__.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/GoUnusedProtection__.go
new file mode 100644
index 0000000..712b6a9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/GoUnusedProtection__.go
@@ -0,0 +1,6 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package baggage
+
+var GoUnusedProtection__ int;
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggage-consts.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggage-consts.go
new file mode 100644
index 0000000..39b5a7e
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggage-consts.go
@@ -0,0 +1,23 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package baggage
+
+import(
+	"bytes"
+	"context"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+
+func init() {
+}
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggage.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggage.go
new file mode 100644
index 0000000..e4d89d5
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/baggage/baggage.go
@@ -0,0 +1,565 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package baggage
+
+import(
+	"bytes"
+	"context"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+// Attributes:
+//  - BaggageKey
+//  - MaxValueLength
+type BaggageRestriction struct {
+  BaggageKey string `thrift:"baggageKey,1,required" db:"baggageKey" json:"baggageKey"`
+  MaxValueLength int32 `thrift:"maxValueLength,2,required" db:"maxValueLength" json:"maxValueLength"`
+}
+
+func NewBaggageRestriction() *BaggageRestriction {
+  return &BaggageRestriction{}
+}
+
+
+func (p *BaggageRestriction) GetBaggageKey() string {
+  return p.BaggageKey
+}
+
+func (p *BaggageRestriction) GetMaxValueLength() int32 {
+  return p.MaxValueLength
+}
+func (p *BaggageRestriction) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetBaggageKey bool = false;
+  var issetMaxValueLength bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetBaggageKey = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.I32 {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetMaxValueLength = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetBaggageKey{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field BaggageKey is not set"));
+  }
+  if !issetMaxValueLength{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field MaxValueLength is not set"));
+  }
+  return nil
+}
+
+func (p *BaggageRestriction)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.BaggageKey = v
+}
+  return nil
+}
+
+func (p *BaggageRestriction)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI32(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  p.MaxValueLength = v
+}
+  return nil
+}
+
+func (p *BaggageRestriction) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "BaggageRestriction"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *BaggageRestriction) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "baggageKey", thrift.STRING, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:baggageKey: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.BaggageKey)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.baggageKey (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:baggageKey: ", p), err) }
+  return err
+}
+
+func (p *BaggageRestriction) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "maxValueLength", thrift.I32, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:maxValueLength: ", p), err) }
+  if err := oprot.WriteI32(ctx, int32(p.MaxValueLength)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.maxValueLength (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:maxValueLength: ", p), err) }
+  return err
+}
+
+func (p *BaggageRestriction) Equals(other *BaggageRestriction) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.BaggageKey != other.BaggageKey { return false }
+  if p.MaxValueLength != other.MaxValueLength { return false }
+  return true
+}
+
+func (p *BaggageRestriction) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("BaggageRestriction(%+v)", *p)
+}
+
+type BaggageRestrictionManager interface {
+  // getBaggageRestrictions retrieves the baggage restrictions for a specific service.
+  // Usually, baggageRestrictions apply to all services however there may be situations
+  // where a baggageKey might only be allowed to be set by a specific service.
+  // 
+  // Parameters:
+  //  - ServiceName
+  GetBaggageRestrictions(ctx context.Context, serviceName string) (_r []*BaggageRestriction, _err error)
+}
+
+type BaggageRestrictionManagerClient struct {
+  c thrift.TClient
+  meta thrift.ResponseMeta
+}
+
+func NewBaggageRestrictionManagerClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *BaggageRestrictionManagerClient {
+  return &BaggageRestrictionManagerClient{
+    c: thrift.NewTStandardClient(f.GetProtocol(t), f.GetProtocol(t)),
+  }
+}
+
+func NewBaggageRestrictionManagerClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *BaggageRestrictionManagerClient {
+  return &BaggageRestrictionManagerClient{
+    c: thrift.NewTStandardClient(iprot, oprot),
+  }
+}
+
+func NewBaggageRestrictionManagerClient(c thrift.TClient) *BaggageRestrictionManagerClient {
+  return &BaggageRestrictionManagerClient{
+    c: c,
+  }
+}
+
+func (p *BaggageRestrictionManagerClient) Client_() thrift.TClient {
+  return p.c
+}
+
+func (p *BaggageRestrictionManagerClient) LastResponseMeta_() thrift.ResponseMeta {
+  return p.meta
+}
+
+func (p *BaggageRestrictionManagerClient) SetLastResponseMeta_(meta thrift.ResponseMeta) {
+  p.meta = meta
+}
+
+// getBaggageRestrictions retrieves the baggage restrictions for a specific service.
+// Usually, baggageRestrictions apply to all services however there may be situations
+// where a baggageKey might only be allowed to be set by a specific service.
+// 
+// Parameters:
+//  - ServiceName
+func (p *BaggageRestrictionManagerClient) GetBaggageRestrictions(ctx context.Context, serviceName string) (_r []*BaggageRestriction, _err error) {
+  var _args0 BaggageRestrictionManagerGetBaggageRestrictionsArgs
+  _args0.ServiceName = serviceName
+  var _result2 BaggageRestrictionManagerGetBaggageRestrictionsResult
+  var _meta1 thrift.ResponseMeta
+  _meta1, _err = p.Client_().Call(ctx, "getBaggageRestrictions", &_args0, &_result2)
+  p.SetLastResponseMeta_(_meta1)
+  if _err != nil {
+    return
+  }
+  return _result2.GetSuccess(), nil
+}
+
+type BaggageRestrictionManagerProcessor struct {
+  processorMap map[string]thrift.TProcessorFunction
+  handler BaggageRestrictionManager
+}
+
+func (p *BaggageRestrictionManagerProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+  p.processorMap[key] = processor
+}
+
+func (p *BaggageRestrictionManagerProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+  processor, ok = p.processorMap[key]
+  return processor, ok
+}
+
+func (p *BaggageRestrictionManagerProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+  return p.processorMap
+}
+
+func NewBaggageRestrictionManagerProcessor(handler BaggageRestrictionManager) *BaggageRestrictionManagerProcessor {
+
+  self3 := &BaggageRestrictionManagerProcessor{handler:handler, processorMap:make(map[string]thrift.TProcessorFunction)}
+  self3.processorMap["getBaggageRestrictions"] = &baggageRestrictionManagerProcessorGetBaggageRestrictions{handler:handler}
+return self3
+}
+
+func (p *BaggageRestrictionManagerProcessor) Process(ctx context.Context, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  name, _, seqId, err2 := iprot.ReadMessageBegin(ctx)
+  if err2 != nil { return false, thrift.WrapTException(err2) }
+  if processor, ok := p.GetProcessorFunction(name); ok {
+    return processor.Process(ctx, seqId, iprot, oprot)
+  }
+  iprot.Skip(ctx, thrift.STRUCT)
+  iprot.ReadMessageEnd(ctx)
+  x4 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function " + name)
+  oprot.WriteMessageBegin(ctx, name, thrift.EXCEPTION, seqId)
+  x4.Write(ctx, oprot)
+  oprot.WriteMessageEnd(ctx)
+  oprot.Flush(ctx)
+  return false, x4
+
+}
+
+type baggageRestrictionManagerProcessorGetBaggageRestrictions struct {
+  handler BaggageRestrictionManager
+}
+
+func (p *baggageRestrictionManagerProcessorGetBaggageRestrictions) Process(ctx context.Context, seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  args := BaggageRestrictionManagerGetBaggageRestrictionsArgs{}
+  var err2 error
+  if err2 = args.Read(ctx, iprot); err2 != nil {
+    iprot.ReadMessageEnd(ctx)
+    x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err2.Error())
+    oprot.WriteMessageBegin(ctx, "getBaggageRestrictions", thrift.EXCEPTION, seqId)
+    x.Write(ctx, oprot)
+    oprot.WriteMessageEnd(ctx)
+    oprot.Flush(ctx)
+    return false, thrift.WrapTException(err2)
+  }
+  iprot.ReadMessageEnd(ctx)
+
+  tickerCancel := func() {}
+  // Start a goroutine to do server side connectivity check.
+  if thrift.ServerConnectivityCheckInterval > 0 {
+    var cancel context.CancelFunc
+    ctx, cancel = context.WithCancel(ctx)
+    defer cancel()
+    var tickerCtx context.Context
+    tickerCtx, tickerCancel = context.WithCancel(context.Background())
+    defer tickerCancel()
+    go func(ctx context.Context, cancel context.CancelFunc) {
+      ticker := time.NewTicker(thrift.ServerConnectivityCheckInterval)
+      defer ticker.Stop()
+      for {
+        select {
+        case <-ctx.Done():
+          return
+        case <-ticker.C:
+          if !iprot.Transport().IsOpen() {
+            cancel()
+            return
+          }
+        }
+      }
+    }(tickerCtx, cancel)
+  }
+
+  result := BaggageRestrictionManagerGetBaggageRestrictionsResult{}
+  var retval []*BaggageRestriction
+  if retval, err2 = p.handler.GetBaggageRestrictions(ctx, args.ServiceName); err2 != nil {
+    tickerCancel()
+    if err2 == thrift.ErrAbandonRequest {
+      return false, thrift.WrapTException(err2)
+    }
+    x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing getBaggageRestrictions: " + err2.Error())
+    oprot.WriteMessageBegin(ctx, "getBaggageRestrictions", thrift.EXCEPTION, seqId)
+    x.Write(ctx, oprot)
+    oprot.WriteMessageEnd(ctx)
+    oprot.Flush(ctx)
+    return true, thrift.WrapTException(err2)
+  } else {
+    result.Success = retval
+  }
+  tickerCancel()
+  if err2 = oprot.WriteMessageBegin(ctx, "getBaggageRestrictions", thrift.REPLY, seqId); err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = result.Write(ctx, oprot); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = oprot.WriteMessageEnd(ctx); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = oprot.Flush(ctx); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err != nil {
+    return
+  }
+  return true, err
+}
+
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - ServiceName
+type BaggageRestrictionManagerGetBaggageRestrictionsArgs struct {
+  ServiceName string `thrift:"serviceName,1" db:"serviceName" json:"serviceName"`
+}
+
+func NewBaggageRestrictionManagerGetBaggageRestrictionsArgs() *BaggageRestrictionManagerGetBaggageRestrictionsArgs {
+  return &BaggageRestrictionManagerGetBaggageRestrictionsArgs{}
+}
+
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) GetServiceName() string {
+  return p.ServiceName
+}
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.ServiceName = v
+}
+  return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "getBaggageRestrictions_args"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "serviceName", thrift.STRING, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:serviceName: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.ServiceName)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.serviceName (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:serviceName: ", p), err) }
+  return err
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsArgs) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("BaggageRestrictionManagerGetBaggageRestrictionsArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Success
+type BaggageRestrictionManagerGetBaggageRestrictionsResult struct {
+  Success []*BaggageRestriction `thrift:"success,0" db:"success" json:"success,omitempty"`
+}
+
+func NewBaggageRestrictionManagerGetBaggageRestrictionsResult() *BaggageRestrictionManagerGetBaggageRestrictionsResult {
+  return &BaggageRestrictionManagerGetBaggageRestrictionsResult{}
+}
+
+var BaggageRestrictionManagerGetBaggageRestrictionsResult_Success_DEFAULT []*BaggageRestriction
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) GetSuccess() []*BaggageRestriction {
+  return p.Success
+}
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) IsSetSuccess() bool {
+  return p.Success != nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 0:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField0(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult)  ReadField0(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*BaggageRestriction, 0, size)
+  p.Success =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem5 := &BaggageRestriction{}
+    if err := _elem5.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem5), err)
+    }
+    p.Success = append(p.Success, _elem5)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "getBaggageRestrictions_result"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField0(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) writeField0(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetSuccess() {
+    if err := oprot.WriteFieldBegin(ctx, "success", thrift.LIST, 0); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err) }
+    if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Success)); err != nil {
+      return thrift.PrependError("error writing list begin: ", err)
+    }
+    for _, v := range p.Success {
+      if err := v.Write(ctx, oprot); err != nil {
+        return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+      }
+    }
+    if err := oprot.WriteListEnd(ctx); err != nil {
+      return thrift.PrependError("error writing list end: ", err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err) }
+  }
+  return err
+}
+
+func (p *BaggageRestrictionManagerGetBaggageRestrictionsResult) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("BaggageRestrictionManagerGetBaggageRestrictionsResult(%+v)", *p)
+}
+
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/GoUnusedProtection__.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/GoUnusedProtection__.go
new file mode 100644
index 0000000..fe45a9f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/GoUnusedProtection__.go
@@ -0,0 +1,6 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package jaeger
+
+var GoUnusedProtection__ int;
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/jaeger-consts.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/jaeger-consts.go
new file mode 100644
index 0000000..b6ce855
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/jaeger-consts.go
@@ -0,0 +1,23 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package jaeger
+
+import(
+	"bytes"
+	"context"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+
+func init() {
+}
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/jaeger.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/jaeger.go
new file mode 100644
index 0000000..d55cca0
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/jaeger/jaeger.go
@@ -0,0 +1,2698 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package jaeger
+
+import(
+	"bytes"
+	"context"
+	"database/sql/driver"
+	"errors"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+type TagType int64
+const (
+  TagType_STRING TagType = 0
+  TagType_DOUBLE TagType = 1
+  TagType_BOOL TagType = 2
+  TagType_LONG TagType = 3
+  TagType_BINARY TagType = 4
+)
+
+func (p TagType) String() string {
+  switch p {
+  case TagType_STRING: return "STRING"
+  case TagType_DOUBLE: return "DOUBLE"
+  case TagType_BOOL: return "BOOL"
+  case TagType_LONG: return "LONG"
+  case TagType_BINARY: return "BINARY"
+  }
+  return "<UNSET>"
+}
+
+func TagTypeFromString(s string) (TagType, error) {
+  switch s {
+  case "STRING": return TagType_STRING, nil 
+  case "DOUBLE": return TagType_DOUBLE, nil 
+  case "BOOL": return TagType_BOOL, nil 
+  case "LONG": return TagType_LONG, nil 
+  case "BINARY": return TagType_BINARY, nil 
+  }
+  return TagType(0), fmt.Errorf("not a valid TagType string")
+}
+
+
+func TagTypePtr(v TagType) *TagType { return &v }
+
+func (p TagType) MarshalText() ([]byte, error) {
+return []byte(p.String()), nil
+}
+
+func (p *TagType) UnmarshalText(text []byte) error {
+q, err := TagTypeFromString(string(text))
+if (err != nil) {
+return err
+}
+*p = q
+return nil
+}
+
+func (p *TagType) Scan(value interface{}) error {
+v, ok := value.(int64)
+if !ok {
+return errors.New("Scan value is not int64")
+}
+*p = TagType(v)
+return nil
+}
+
+func (p * TagType) Value() (driver.Value, error) {
+  if p == nil {
+    return nil, nil
+  }
+return int64(*p), nil
+}
+type SpanRefType int64
+const (
+  SpanRefType_CHILD_OF SpanRefType = 0
+  SpanRefType_FOLLOWS_FROM SpanRefType = 1
+)
+
+func (p SpanRefType) String() string {
+  switch p {
+  case SpanRefType_CHILD_OF: return "CHILD_OF"
+  case SpanRefType_FOLLOWS_FROM: return "FOLLOWS_FROM"
+  }
+  return "<UNSET>"
+}
+
+func SpanRefTypeFromString(s string) (SpanRefType, error) {
+  switch s {
+  case "CHILD_OF": return SpanRefType_CHILD_OF, nil 
+  case "FOLLOWS_FROM": return SpanRefType_FOLLOWS_FROM, nil 
+  }
+  return SpanRefType(0), fmt.Errorf("not a valid SpanRefType string")
+}
+
+
+func SpanRefTypePtr(v SpanRefType) *SpanRefType { return &v }
+
+func (p SpanRefType) MarshalText() ([]byte, error) {
+return []byte(p.String()), nil
+}
+
+func (p *SpanRefType) UnmarshalText(text []byte) error {
+q, err := SpanRefTypeFromString(string(text))
+if (err != nil) {
+return err
+}
+*p = q
+return nil
+}
+
+func (p *SpanRefType) Scan(value interface{}) error {
+v, ok := value.(int64)
+if !ok {
+return errors.New("Scan value is not int64")
+}
+*p = SpanRefType(v)
+return nil
+}
+
+func (p * SpanRefType) Value() (driver.Value, error) {
+  if p == nil {
+    return nil, nil
+  }
+return int64(*p), nil
+}
+// Attributes:
+//  - Key
+//  - VType
+//  - VStr
+//  - VDouble
+//  - VBool
+//  - VLong
+//  - VBinary
+type Tag struct {
+  Key string `thrift:"key,1,required" db:"key" json:"key"`
+  VType TagType `thrift:"vType,2,required" db:"vType" json:"vType"`
+  VStr *string `thrift:"vStr,3" db:"vStr" json:"vStr,omitempty"`
+  VDouble *float64 `thrift:"vDouble,4" db:"vDouble" json:"vDouble,omitempty"`
+  VBool *bool `thrift:"vBool,5" db:"vBool" json:"vBool,omitempty"`
+  VLong *int64 `thrift:"vLong,6" db:"vLong" json:"vLong,omitempty"`
+  VBinary []byte `thrift:"vBinary,7" db:"vBinary" json:"vBinary,omitempty"`
+}
+
+func NewTag() *Tag {
+  return &Tag{}
+}
+
+
+func (p *Tag) GetKey() string {
+  return p.Key
+}
+
+func (p *Tag) GetVType() TagType {
+  return p.VType
+}
+var Tag_VStr_DEFAULT string
+func (p *Tag) GetVStr() string {
+  if !p.IsSetVStr() {
+    return Tag_VStr_DEFAULT
+  }
+return *p.VStr
+}
+var Tag_VDouble_DEFAULT float64
+func (p *Tag) GetVDouble() float64 {
+  if !p.IsSetVDouble() {
+    return Tag_VDouble_DEFAULT
+  }
+return *p.VDouble
+}
+var Tag_VBool_DEFAULT bool
+func (p *Tag) GetVBool() bool {
+  if !p.IsSetVBool() {
+    return Tag_VBool_DEFAULT
+  }
+return *p.VBool
+}
+var Tag_VLong_DEFAULT int64
+func (p *Tag) GetVLong() int64 {
+  if !p.IsSetVLong() {
+    return Tag_VLong_DEFAULT
+  }
+return *p.VLong
+}
+var Tag_VBinary_DEFAULT []byte
+
+func (p *Tag) GetVBinary() []byte {
+  return p.VBinary
+}
+func (p *Tag) IsSetVStr() bool {
+  return p.VStr != nil
+}
+
+func (p *Tag) IsSetVDouble() bool {
+  return p.VDouble != nil
+}
+
+func (p *Tag) IsSetVBool() bool {
+  return p.VBool != nil
+}
+
+func (p *Tag) IsSetVLong() bool {
+  return p.VLong != nil
+}
+
+func (p *Tag) IsSetVBinary() bool {
+  return p.VBinary != nil
+}
+
+func (p *Tag) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetKey bool = false;
+  var issetVType bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetKey = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.I32 {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetVType = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.DOUBLE {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 5:
+      if fieldTypeId == thrift.BOOL {
+        if err := p.ReadField5(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 6:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField6(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 7:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField7(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetKey{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Key is not set"));
+  }
+  if !issetVType{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field VType is not set"));
+  }
+  return nil
+}
+
+func (p *Tag)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.Key = v
+}
+  return nil
+}
+
+func (p *Tag)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI32(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  temp := TagType(v)
+  p.VType = temp
+}
+  return nil
+}
+
+func (p *Tag)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 3: ", err)
+} else {
+  p.VStr = &v
+}
+  return nil
+}
+
+func (p *Tag)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadDouble(ctx); err != nil {
+  return thrift.PrependError("error reading field 4: ", err)
+} else {
+  p.VDouble = &v
+}
+  return nil
+}
+
+func (p *Tag)  ReadField5(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadBool(ctx); err != nil {
+  return thrift.PrependError("error reading field 5: ", err)
+} else {
+  p.VBool = &v
+}
+  return nil
+}
+
+func (p *Tag)  ReadField6(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 6: ", err)
+} else {
+  p.VLong = &v
+}
+  return nil
+}
+
+func (p *Tag)  ReadField7(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadBinary(ctx); err != nil {
+  return thrift.PrependError("error reading field 7: ", err)
+} else {
+  p.VBinary = v
+}
+  return nil
+}
+
+func (p *Tag) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Tag"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+    if err := p.writeField5(ctx, oprot); err != nil { return err }
+    if err := p.writeField6(ctx, oprot); err != nil { return err }
+    if err := p.writeField7(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Tag) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "key", thrift.STRING, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:key: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.Key)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.key (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:key: ", p), err) }
+  return err
+}
+
+func (p *Tag) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "vType", thrift.I32, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:vType: ", p), err) }
+  if err := oprot.WriteI32(ctx, int32(p.VType)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.vType (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:vType: ", p), err) }
+  return err
+}
+
+func (p *Tag) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetVStr() {
+    if err := oprot.WriteFieldBegin(ctx, "vStr", thrift.STRING, 3); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:vStr: ", p), err) }
+    if err := oprot.WriteString(ctx, string(*p.VStr)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.vStr (3) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 3:vStr: ", p), err) }
+  }
+  return err
+}
+
+func (p *Tag) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetVDouble() {
+    if err := oprot.WriteFieldBegin(ctx, "vDouble", thrift.DOUBLE, 4); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:vDouble: ", p), err) }
+    if err := oprot.WriteDouble(ctx, float64(*p.VDouble)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.vDouble (4) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 4:vDouble: ", p), err) }
+  }
+  return err
+}
+
+func (p *Tag) writeField5(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetVBool() {
+    if err := oprot.WriteFieldBegin(ctx, "vBool", thrift.BOOL, 5); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 5:vBool: ", p), err) }
+    if err := oprot.WriteBool(ctx, bool(*p.VBool)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.vBool (5) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 5:vBool: ", p), err) }
+  }
+  return err
+}
+
+func (p *Tag) writeField6(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetVLong() {
+    if err := oprot.WriteFieldBegin(ctx, "vLong", thrift.I64, 6); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 6:vLong: ", p), err) }
+    if err := oprot.WriteI64(ctx, int64(*p.VLong)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.vLong (6) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 6:vLong: ", p), err) }
+  }
+  return err
+}
+
+func (p *Tag) writeField7(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetVBinary() {
+    if err := oprot.WriteFieldBegin(ctx, "vBinary", thrift.STRING, 7); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 7:vBinary: ", p), err) }
+    if err := oprot.WriteBinary(ctx, p.VBinary); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.vBinary (7) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 7:vBinary: ", p), err) }
+  }
+  return err
+}
+
+func (p *Tag) Equals(other *Tag) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.Key != other.Key { return false }
+  if p.VType != other.VType { return false }
+  if p.VStr != other.VStr {
+    if p.VStr == nil || other.VStr == nil {
+      return false
+    }
+    if (*p.VStr) != (*other.VStr) { return false }
+  }
+  if p.VDouble != other.VDouble {
+    if p.VDouble == nil || other.VDouble == nil {
+      return false
+    }
+    if (*p.VDouble) != (*other.VDouble) { return false }
+  }
+  if p.VBool != other.VBool {
+    if p.VBool == nil || other.VBool == nil {
+      return false
+    }
+    if (*p.VBool) != (*other.VBool) { return false }
+  }
+  if p.VLong != other.VLong {
+    if p.VLong == nil || other.VLong == nil {
+      return false
+    }
+    if (*p.VLong) != (*other.VLong) { return false }
+  }
+  if bytes.Compare(p.VBinary, other.VBinary) != 0 { return false }
+  return true
+}
+
+func (p *Tag) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Tag(%+v)", *p)
+}
+
+// Attributes:
+//  - Timestamp
+//  - Fields
+type Log struct {
+  Timestamp int64 `thrift:"timestamp,1,required" db:"timestamp" json:"timestamp"`
+  Fields []*Tag `thrift:"fields,2,required" db:"fields" json:"fields"`
+}
+
+func NewLog() *Log {
+  return &Log{}
+}
+
+
+func (p *Log) GetTimestamp() int64 {
+  return p.Timestamp
+}
+
+func (p *Log) GetFields() []*Tag {
+  return p.Fields
+}
+func (p *Log) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetTimestamp bool = false;
+  var issetFields bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetTimestamp = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetFields = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetTimestamp{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Timestamp is not set"));
+  }
+  if !issetFields{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Fields is not set"));
+  }
+  return nil
+}
+
+func (p *Log)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.Timestamp = v
+}
+  return nil
+}
+
+func (p *Log)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Tag, 0, size)
+  p.Fields =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem0 := &Tag{}
+    if err := _elem0.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem0), err)
+    }
+    p.Fields = append(p.Fields, _elem0)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *Log) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Log"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Log) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "timestamp", thrift.I64, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:timestamp: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.Timestamp)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.timestamp (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:timestamp: ", p), err) }
+  return err
+}
+
+func (p *Log) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "fields", thrift.LIST, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:fields: ", p), err) }
+  if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Fields)); err != nil {
+    return thrift.PrependError("error writing list begin: ", err)
+  }
+  for _, v := range p.Fields {
+    if err := v.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+    }
+  }
+  if err := oprot.WriteListEnd(ctx); err != nil {
+    return thrift.PrependError("error writing list end: ", err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:fields: ", p), err) }
+  return err
+}
+
+func (p *Log) Equals(other *Log) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.Timestamp != other.Timestamp { return false }
+  if len(p.Fields) != len(other.Fields) { return false }
+  for i, _tgt := range p.Fields {
+    _src1 := other.Fields[i]
+    if !_tgt.Equals(_src1) { return false }
+  }
+  return true
+}
+
+func (p *Log) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Log(%+v)", *p)
+}
+
+// Attributes:
+//  - RefType
+//  - TraceIdLow
+//  - TraceIdHigh
+//  - SpanId
+type SpanRef struct {
+  RefType SpanRefType `thrift:"refType,1,required" db:"refType" json:"refType"`
+  TraceIdLow int64 `thrift:"traceIdLow,2,required" db:"traceIdLow" json:"traceIdLow"`
+  TraceIdHigh int64 `thrift:"traceIdHigh,3,required" db:"traceIdHigh" json:"traceIdHigh"`
+  SpanId int64 `thrift:"spanId,4,required" db:"spanId" json:"spanId"`
+}
+
+func NewSpanRef() *SpanRef {
+  return &SpanRef{}
+}
+
+
+func (p *SpanRef) GetRefType() SpanRefType {
+  return p.RefType
+}
+
+func (p *SpanRef) GetTraceIdLow() int64 {
+  return p.TraceIdLow
+}
+
+func (p *SpanRef) GetTraceIdHigh() int64 {
+  return p.TraceIdHigh
+}
+
+func (p *SpanRef) GetSpanId() int64 {
+  return p.SpanId
+}
+func (p *SpanRef) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetRefType bool = false;
+  var issetTraceIdLow bool = false;
+  var issetTraceIdHigh bool = false;
+  var issetSpanId bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I32 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetRefType = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetTraceIdLow = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+        issetTraceIdHigh = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+        issetSpanId = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetRefType{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field RefType is not set"));
+  }
+  if !issetTraceIdLow{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TraceIdLow is not set"));
+  }
+  if !issetTraceIdHigh{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TraceIdHigh is not set"));
+  }
+  if !issetSpanId{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field SpanId is not set"));
+  }
+  return nil
+}
+
+func (p *SpanRef)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI32(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  temp := SpanRefType(v)
+  p.RefType = temp
+}
+  return nil
+}
+
+func (p *SpanRef)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  p.TraceIdLow = v
+}
+  return nil
+}
+
+func (p *SpanRef)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 3: ", err)
+} else {
+  p.TraceIdHigh = v
+}
+  return nil
+}
+
+func (p *SpanRef)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 4: ", err)
+} else {
+  p.SpanId = v
+}
+  return nil
+}
+
+func (p *SpanRef) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "SpanRef"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *SpanRef) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "refType", thrift.I32, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:refType: ", p), err) }
+  if err := oprot.WriteI32(ctx, int32(p.RefType)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.refType (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:refType: ", p), err) }
+  return err
+}
+
+func (p *SpanRef) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "traceIdLow", thrift.I64, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:traceIdLow: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.TraceIdLow)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.traceIdLow (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:traceIdLow: ", p), err) }
+  return err
+}
+
+func (p *SpanRef) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "traceIdHigh", thrift.I64, 3); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:traceIdHigh: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.TraceIdHigh)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.traceIdHigh (3) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 3:traceIdHigh: ", p), err) }
+  return err
+}
+
+func (p *SpanRef) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "spanId", thrift.I64, 4); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:spanId: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.SpanId)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.spanId (4) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 4:spanId: ", p), err) }
+  return err
+}
+
+func (p *SpanRef) Equals(other *SpanRef) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.RefType != other.RefType { return false }
+  if p.TraceIdLow != other.TraceIdLow { return false }
+  if p.TraceIdHigh != other.TraceIdHigh { return false }
+  if p.SpanId != other.SpanId { return false }
+  return true
+}
+
+func (p *SpanRef) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("SpanRef(%+v)", *p)
+}
+
+// Attributes:
+//  - TraceIdLow
+//  - TraceIdHigh
+//  - SpanId
+//  - ParentSpanId
+//  - OperationName
+//  - References
+//  - Flags
+//  - StartTime
+//  - Duration
+//  - Tags
+//  - Logs
+type Span struct {
+  TraceIdLow int64 `thrift:"traceIdLow,1,required" db:"traceIdLow" json:"traceIdLow"`
+  TraceIdHigh int64 `thrift:"traceIdHigh,2,required" db:"traceIdHigh" json:"traceIdHigh"`
+  SpanId int64 `thrift:"spanId,3,required" db:"spanId" json:"spanId"`
+  ParentSpanId int64 `thrift:"parentSpanId,4,required" db:"parentSpanId" json:"parentSpanId"`
+  OperationName string `thrift:"operationName,5,required" db:"operationName" json:"operationName"`
+  References []*SpanRef `thrift:"references,6" db:"references" json:"references,omitempty"`
+  Flags int32 `thrift:"flags,7,required" db:"flags" json:"flags"`
+  StartTime int64 `thrift:"startTime,8,required" db:"startTime" json:"startTime"`
+  Duration int64 `thrift:"duration,9,required" db:"duration" json:"duration"`
+  Tags []*Tag `thrift:"tags,10" db:"tags" json:"tags,omitempty"`
+  Logs []*Log `thrift:"logs,11" db:"logs" json:"logs,omitempty"`
+}
+
+func NewSpan() *Span {
+  return &Span{}
+}
+
+
+func (p *Span) GetTraceIdLow() int64 {
+  return p.TraceIdLow
+}
+
+func (p *Span) GetTraceIdHigh() int64 {
+  return p.TraceIdHigh
+}
+
+func (p *Span) GetSpanId() int64 {
+  return p.SpanId
+}
+
+func (p *Span) GetParentSpanId() int64 {
+  return p.ParentSpanId
+}
+
+func (p *Span) GetOperationName() string {
+  return p.OperationName
+}
+var Span_References_DEFAULT []*SpanRef
+
+func (p *Span) GetReferences() []*SpanRef {
+  return p.References
+}
+
+func (p *Span) GetFlags() int32 {
+  return p.Flags
+}
+
+func (p *Span) GetStartTime() int64 {
+  return p.StartTime
+}
+
+func (p *Span) GetDuration() int64 {
+  return p.Duration
+}
+var Span_Tags_DEFAULT []*Tag
+
+func (p *Span) GetTags() []*Tag {
+  return p.Tags
+}
+var Span_Logs_DEFAULT []*Log
+
+func (p *Span) GetLogs() []*Log {
+  return p.Logs
+}
+func (p *Span) IsSetReferences() bool {
+  return p.References != nil
+}
+
+func (p *Span) IsSetTags() bool {
+  return p.Tags != nil
+}
+
+func (p *Span) IsSetLogs() bool {
+  return p.Logs != nil
+}
+
+func (p *Span) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetTraceIdLow bool = false;
+  var issetTraceIdHigh bool = false;
+  var issetSpanId bool = false;
+  var issetParentSpanId bool = false;
+  var issetOperationName bool = false;
+  var issetFlags bool = false;
+  var issetStartTime bool = false;
+  var issetDuration bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetTraceIdLow = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetTraceIdHigh = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+        issetSpanId = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+        issetParentSpanId = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 5:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField5(ctx, iprot); err != nil {
+          return err
+        }
+        issetOperationName = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 6:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField6(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 7:
+      if fieldTypeId == thrift.I32 {
+        if err := p.ReadField7(ctx, iprot); err != nil {
+          return err
+        }
+        issetFlags = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 8:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField8(ctx, iprot); err != nil {
+          return err
+        }
+        issetStartTime = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 9:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField9(ctx, iprot); err != nil {
+          return err
+        }
+        issetDuration = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 10:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField10(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 11:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField11(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetTraceIdLow{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TraceIdLow is not set"));
+  }
+  if !issetTraceIdHigh{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TraceIdHigh is not set"));
+  }
+  if !issetSpanId{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field SpanId is not set"));
+  }
+  if !issetParentSpanId{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field ParentSpanId is not set"));
+  }
+  if !issetOperationName{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field OperationName is not set"));
+  }
+  if !issetFlags{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Flags is not set"));
+  }
+  if !issetStartTime{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field StartTime is not set"));
+  }
+  if !issetDuration{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Duration is not set"));
+  }
+  return nil
+}
+
+func (p *Span)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.TraceIdLow = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  p.TraceIdHigh = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 3: ", err)
+} else {
+  p.SpanId = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 4: ", err)
+} else {
+  p.ParentSpanId = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField5(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 5: ", err)
+} else {
+  p.OperationName = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField6(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*SpanRef, 0, size)
+  p.References =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem2 := &SpanRef{}
+    if err := _elem2.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem2), err)
+    }
+    p.References = append(p.References, _elem2)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *Span)  ReadField7(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI32(ctx); err != nil {
+  return thrift.PrependError("error reading field 7: ", err)
+} else {
+  p.Flags = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField8(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 8: ", err)
+} else {
+  p.StartTime = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField9(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 9: ", err)
+} else {
+  p.Duration = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField10(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Tag, 0, size)
+  p.Tags =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem3 := &Tag{}
+    if err := _elem3.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem3), err)
+    }
+    p.Tags = append(p.Tags, _elem3)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *Span)  ReadField11(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Log, 0, size)
+  p.Logs =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem4 := &Log{}
+    if err := _elem4.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem4), err)
+    }
+    p.Logs = append(p.Logs, _elem4)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *Span) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Span"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+    if err := p.writeField5(ctx, oprot); err != nil { return err }
+    if err := p.writeField6(ctx, oprot); err != nil { return err }
+    if err := p.writeField7(ctx, oprot); err != nil { return err }
+    if err := p.writeField8(ctx, oprot); err != nil { return err }
+    if err := p.writeField9(ctx, oprot); err != nil { return err }
+    if err := p.writeField10(ctx, oprot); err != nil { return err }
+    if err := p.writeField11(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Span) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "traceIdLow", thrift.I64, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:traceIdLow: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.TraceIdLow)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.traceIdLow (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:traceIdLow: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "traceIdHigh", thrift.I64, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:traceIdHigh: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.TraceIdHigh)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.traceIdHigh (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:traceIdHigh: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "spanId", thrift.I64, 3); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:spanId: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.SpanId)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.spanId (3) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 3:spanId: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "parentSpanId", thrift.I64, 4); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:parentSpanId: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.ParentSpanId)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.parentSpanId (4) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 4:parentSpanId: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField5(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "operationName", thrift.STRING, 5); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 5:operationName: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.OperationName)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.operationName (5) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 5:operationName: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField6(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetReferences() {
+    if err := oprot.WriteFieldBegin(ctx, "references", thrift.LIST, 6); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 6:references: ", p), err) }
+    if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.References)); err != nil {
+      return thrift.PrependError("error writing list begin: ", err)
+    }
+    for _, v := range p.References {
+      if err := v.Write(ctx, oprot); err != nil {
+        return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+      }
+    }
+    if err := oprot.WriteListEnd(ctx); err != nil {
+      return thrift.PrependError("error writing list end: ", err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 6:references: ", p), err) }
+  }
+  return err
+}
+
+func (p *Span) writeField7(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "flags", thrift.I32, 7); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 7:flags: ", p), err) }
+  if err := oprot.WriteI32(ctx, int32(p.Flags)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.flags (7) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 7:flags: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField8(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "startTime", thrift.I64, 8); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 8:startTime: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.StartTime)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.startTime (8) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 8:startTime: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField9(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "duration", thrift.I64, 9); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 9:duration: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.Duration)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.duration (9) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 9:duration: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField10(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetTags() {
+    if err := oprot.WriteFieldBegin(ctx, "tags", thrift.LIST, 10); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 10:tags: ", p), err) }
+    if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Tags)); err != nil {
+      return thrift.PrependError("error writing list begin: ", err)
+    }
+    for _, v := range p.Tags {
+      if err := v.Write(ctx, oprot); err != nil {
+        return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+      }
+    }
+    if err := oprot.WriteListEnd(ctx); err != nil {
+      return thrift.PrependError("error writing list end: ", err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 10:tags: ", p), err) }
+  }
+  return err
+}
+
+func (p *Span) writeField11(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetLogs() {
+    if err := oprot.WriteFieldBegin(ctx, "logs", thrift.LIST, 11); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 11:logs: ", p), err) }
+    if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Logs)); err != nil {
+      return thrift.PrependError("error writing list begin: ", err)
+    }
+    for _, v := range p.Logs {
+      if err := v.Write(ctx, oprot); err != nil {
+        return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+      }
+    }
+    if err := oprot.WriteListEnd(ctx); err != nil {
+      return thrift.PrependError("error writing list end: ", err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 11:logs: ", p), err) }
+  }
+  return err
+}
+
+func (p *Span) Equals(other *Span) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.TraceIdLow != other.TraceIdLow { return false }
+  if p.TraceIdHigh != other.TraceIdHigh { return false }
+  if p.SpanId != other.SpanId { return false }
+  if p.ParentSpanId != other.ParentSpanId { return false }
+  if p.OperationName != other.OperationName { return false }
+  if len(p.References) != len(other.References) { return false }
+  for i, _tgt := range p.References {
+    _src5 := other.References[i]
+    if !_tgt.Equals(_src5) { return false }
+  }
+  if p.Flags != other.Flags { return false }
+  if p.StartTime != other.StartTime { return false }
+  if p.Duration != other.Duration { return false }
+  if len(p.Tags) != len(other.Tags) { return false }
+  for i, _tgt := range p.Tags {
+    _src6 := other.Tags[i]
+    if !_tgt.Equals(_src6) { return false }
+  }
+  if len(p.Logs) != len(other.Logs) { return false }
+  for i, _tgt := range p.Logs {
+    _src7 := other.Logs[i]
+    if !_tgt.Equals(_src7) { return false }
+  }
+  return true
+}
+
+func (p *Span) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Span(%+v)", *p)
+}
+
+// Attributes:
+//  - ServiceName
+//  - Tags
+type Process struct {
+  ServiceName string `thrift:"serviceName,1,required" db:"serviceName" json:"serviceName"`
+  Tags []*Tag `thrift:"tags,2" db:"tags" json:"tags,omitempty"`
+}
+
+func NewProcess() *Process {
+  return &Process{}
+}
+
+
+func (p *Process) GetServiceName() string {
+  return p.ServiceName
+}
+var Process_Tags_DEFAULT []*Tag
+
+func (p *Process) GetTags() []*Tag {
+  return p.Tags
+}
+func (p *Process) IsSetTags() bool {
+  return p.Tags != nil
+}
+
+func (p *Process) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetServiceName bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetServiceName = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetServiceName{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field ServiceName is not set"));
+  }
+  return nil
+}
+
+func (p *Process)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.ServiceName = v
+}
+  return nil
+}
+
+func (p *Process)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Tag, 0, size)
+  p.Tags =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem8 := &Tag{}
+    if err := _elem8.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem8), err)
+    }
+    p.Tags = append(p.Tags, _elem8)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *Process) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Process"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Process) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "serviceName", thrift.STRING, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:serviceName: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.ServiceName)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.serviceName (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:serviceName: ", p), err) }
+  return err
+}
+
+func (p *Process) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetTags() {
+    if err := oprot.WriteFieldBegin(ctx, "tags", thrift.LIST, 2); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:tags: ", p), err) }
+    if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Tags)); err != nil {
+      return thrift.PrependError("error writing list begin: ", err)
+    }
+    for _, v := range p.Tags {
+      if err := v.Write(ctx, oprot); err != nil {
+        return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+      }
+    }
+    if err := oprot.WriteListEnd(ctx); err != nil {
+      return thrift.PrependError("error writing list end: ", err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 2:tags: ", p), err) }
+  }
+  return err
+}
+
+func (p *Process) Equals(other *Process) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.ServiceName != other.ServiceName { return false }
+  if len(p.Tags) != len(other.Tags) { return false }
+  for i, _tgt := range p.Tags {
+    _src9 := other.Tags[i]
+    if !_tgt.Equals(_src9) { return false }
+  }
+  return true
+}
+
+func (p *Process) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Process(%+v)", *p)
+}
+
+// Attributes:
+//  - FullQueueDroppedSpans
+//  - TooLargeDroppedSpans
+//  - FailedToEmitSpans
+type ClientStats struct {
+  FullQueueDroppedSpans int64 `thrift:"fullQueueDroppedSpans,1,required" db:"fullQueueDroppedSpans" json:"fullQueueDroppedSpans"`
+  TooLargeDroppedSpans int64 `thrift:"tooLargeDroppedSpans,2,required" db:"tooLargeDroppedSpans" json:"tooLargeDroppedSpans"`
+  FailedToEmitSpans int64 `thrift:"failedToEmitSpans,3,required" db:"failedToEmitSpans" json:"failedToEmitSpans"`
+}
+
+func NewClientStats() *ClientStats {
+  return &ClientStats{}
+}
+
+
+func (p *ClientStats) GetFullQueueDroppedSpans() int64 {
+  return p.FullQueueDroppedSpans
+}
+
+func (p *ClientStats) GetTooLargeDroppedSpans() int64 {
+  return p.TooLargeDroppedSpans
+}
+
+func (p *ClientStats) GetFailedToEmitSpans() int64 {
+  return p.FailedToEmitSpans
+}
+func (p *ClientStats) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetFullQueueDroppedSpans bool = false;
+  var issetTooLargeDroppedSpans bool = false;
+  var issetFailedToEmitSpans bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetFullQueueDroppedSpans = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetTooLargeDroppedSpans = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+        issetFailedToEmitSpans = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetFullQueueDroppedSpans{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field FullQueueDroppedSpans is not set"));
+  }
+  if !issetTooLargeDroppedSpans{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field TooLargeDroppedSpans is not set"));
+  }
+  if !issetFailedToEmitSpans{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field FailedToEmitSpans is not set"));
+  }
+  return nil
+}
+
+func (p *ClientStats)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.FullQueueDroppedSpans = v
+}
+  return nil
+}
+
+func (p *ClientStats)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  p.TooLargeDroppedSpans = v
+}
+  return nil
+}
+
+func (p *ClientStats)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 3: ", err)
+} else {
+  p.FailedToEmitSpans = v
+}
+  return nil
+}
+
+func (p *ClientStats) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "ClientStats"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *ClientStats) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "fullQueueDroppedSpans", thrift.I64, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:fullQueueDroppedSpans: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.FullQueueDroppedSpans)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.fullQueueDroppedSpans (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:fullQueueDroppedSpans: ", p), err) }
+  return err
+}
+
+func (p *ClientStats) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "tooLargeDroppedSpans", thrift.I64, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:tooLargeDroppedSpans: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.TooLargeDroppedSpans)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.tooLargeDroppedSpans (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:tooLargeDroppedSpans: ", p), err) }
+  return err
+}
+
+func (p *ClientStats) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "failedToEmitSpans", thrift.I64, 3); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:failedToEmitSpans: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.FailedToEmitSpans)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.failedToEmitSpans (3) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 3:failedToEmitSpans: ", p), err) }
+  return err
+}
+
+func (p *ClientStats) Equals(other *ClientStats) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.FullQueueDroppedSpans != other.FullQueueDroppedSpans { return false }
+  if p.TooLargeDroppedSpans != other.TooLargeDroppedSpans { return false }
+  if p.FailedToEmitSpans != other.FailedToEmitSpans { return false }
+  return true
+}
+
+func (p *ClientStats) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("ClientStats(%+v)", *p)
+}
+
+// Attributes:
+//  - Process
+//  - Spans
+//  - SeqNo
+//  - Stats
+type Batch struct {
+  Process *Process `thrift:"process,1,required" db:"process" json:"process"`
+  Spans []*Span `thrift:"spans,2,required" db:"spans" json:"spans"`
+  SeqNo *int64 `thrift:"seqNo,3" db:"seqNo" json:"seqNo,omitempty"`
+  Stats *ClientStats `thrift:"stats,4" db:"stats" json:"stats,omitempty"`
+}
+
+func NewBatch() *Batch {
+  return &Batch{}
+}
+
+var Batch_Process_DEFAULT *Process
+func (p *Batch) GetProcess() *Process {
+  if !p.IsSetProcess() {
+    return Batch_Process_DEFAULT
+  }
+return p.Process
+}
+
+func (p *Batch) GetSpans() []*Span {
+  return p.Spans
+}
+var Batch_SeqNo_DEFAULT int64
+func (p *Batch) GetSeqNo() int64 {
+  if !p.IsSetSeqNo() {
+    return Batch_SeqNo_DEFAULT
+  }
+return *p.SeqNo
+}
+var Batch_Stats_DEFAULT *ClientStats
+func (p *Batch) GetStats() *ClientStats {
+  if !p.IsSetStats() {
+    return Batch_Stats_DEFAULT
+  }
+return p.Stats
+}
+func (p *Batch) IsSetProcess() bool {
+  return p.Process != nil
+}
+
+func (p *Batch) IsSetSeqNo() bool {
+  return p.SeqNo != nil
+}
+
+func (p *Batch) IsSetStats() bool {
+  return p.Stats != nil
+}
+
+func (p *Batch) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetProcess bool = false;
+  var issetSpans bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetProcess = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetSpans = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetProcess{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Process is not set"));
+  }
+  if !issetSpans{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Spans is not set"));
+  }
+  return nil
+}
+
+func (p *Batch)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  p.Process = &Process{}
+  if err := p.Process.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Process), err)
+  }
+  return nil
+}
+
+func (p *Batch)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Span, 0, size)
+  p.Spans =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem10 := &Span{}
+    if err := _elem10.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem10), err)
+    }
+    p.Spans = append(p.Spans, _elem10)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *Batch)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 3: ", err)
+} else {
+  p.SeqNo = &v
+}
+  return nil
+}
+
+func (p *Batch)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  p.Stats = &ClientStats{}
+  if err := p.Stats.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Stats), err)
+  }
+  return nil
+}
+
+func (p *Batch) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Batch"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Batch) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "process", thrift.STRUCT, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:process: ", p), err) }
+  if err := p.Process.Write(ctx, oprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Process), err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:process: ", p), err) }
+  return err
+}
+
+func (p *Batch) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "spans", thrift.LIST, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:spans: ", p), err) }
+  if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Spans)); err != nil {
+    return thrift.PrependError("error writing list begin: ", err)
+  }
+  for _, v := range p.Spans {
+    if err := v.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+    }
+  }
+  if err := oprot.WriteListEnd(ctx); err != nil {
+    return thrift.PrependError("error writing list end: ", err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:spans: ", p), err) }
+  return err
+}
+
+func (p *Batch) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetSeqNo() {
+    if err := oprot.WriteFieldBegin(ctx, "seqNo", thrift.I64, 3); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:seqNo: ", p), err) }
+    if err := oprot.WriteI64(ctx, int64(*p.SeqNo)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.seqNo (3) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 3:seqNo: ", p), err) }
+  }
+  return err
+}
+
+func (p *Batch) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetStats() {
+    if err := oprot.WriteFieldBegin(ctx, "stats", thrift.STRUCT, 4); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:stats: ", p), err) }
+    if err := p.Stats.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Stats), err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 4:stats: ", p), err) }
+  }
+  return err
+}
+
+func (p *Batch) Equals(other *Batch) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if !p.Process.Equals(other.Process) { return false }
+  if len(p.Spans) != len(other.Spans) { return false }
+  for i, _tgt := range p.Spans {
+    _src11 := other.Spans[i]
+    if !_tgt.Equals(_src11) { return false }
+  }
+  if p.SeqNo != other.SeqNo {
+    if p.SeqNo == nil || other.SeqNo == nil {
+      return false
+    }
+    if (*p.SeqNo) != (*other.SeqNo) { return false }
+  }
+  if !p.Stats.Equals(other.Stats) { return false }
+  return true
+}
+
+func (p *Batch) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Batch(%+v)", *p)
+}
+
+// Attributes:
+//  - Ok
+type BatchSubmitResponse struct {
+  Ok bool `thrift:"ok,1,required" db:"ok" json:"ok"`
+}
+
+func NewBatchSubmitResponse() *BatchSubmitResponse {
+  return &BatchSubmitResponse{}
+}
+
+
+func (p *BatchSubmitResponse) GetOk() bool {
+  return p.Ok
+}
+func (p *BatchSubmitResponse) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetOk bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.BOOL {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetOk = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetOk{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Ok is not set"));
+  }
+  return nil
+}
+
+func (p *BatchSubmitResponse)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadBool(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.Ok = v
+}
+  return nil
+}
+
+func (p *BatchSubmitResponse) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "BatchSubmitResponse"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *BatchSubmitResponse) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "ok", thrift.BOOL, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:ok: ", p), err) }
+  if err := oprot.WriteBool(ctx, bool(p.Ok)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.ok (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:ok: ", p), err) }
+  return err
+}
+
+func (p *BatchSubmitResponse) Equals(other *BatchSubmitResponse) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.Ok != other.Ok { return false }
+  return true
+}
+
+func (p *BatchSubmitResponse) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("BatchSubmitResponse(%+v)", *p)
+}
+
+type Collector interface {
+  // Parameters:
+  //  - Batches
+  SubmitBatches(ctx context.Context, batches []*Batch) (_r []*BatchSubmitResponse, _err error)
+}
+
+type CollectorClient struct {
+  c thrift.TClient
+  meta thrift.ResponseMeta
+}
+
+func NewCollectorClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *CollectorClient {
+  return &CollectorClient{
+    c: thrift.NewTStandardClient(f.GetProtocol(t), f.GetProtocol(t)),
+  }
+}
+
+func NewCollectorClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *CollectorClient {
+  return &CollectorClient{
+    c: thrift.NewTStandardClient(iprot, oprot),
+  }
+}
+
+func NewCollectorClient(c thrift.TClient) *CollectorClient {
+  return &CollectorClient{
+    c: c,
+  }
+}
+
+func (p *CollectorClient) Client_() thrift.TClient {
+  return p.c
+}
+
+func (p *CollectorClient) LastResponseMeta_() thrift.ResponseMeta {
+  return p.meta
+}
+
+func (p *CollectorClient) SetLastResponseMeta_(meta thrift.ResponseMeta) {
+  p.meta = meta
+}
+
+// Parameters:
+//  - Batches
+func (p *CollectorClient) SubmitBatches(ctx context.Context, batches []*Batch) (_r []*BatchSubmitResponse, _err error) {
+  var _args12 CollectorSubmitBatchesArgs
+  _args12.Batches = batches
+  var _result14 CollectorSubmitBatchesResult
+  var _meta13 thrift.ResponseMeta
+  _meta13, _err = p.Client_().Call(ctx, "submitBatches", &_args12, &_result14)
+  p.SetLastResponseMeta_(_meta13)
+  if _err != nil {
+    return
+  }
+  return _result14.GetSuccess(), nil
+}
+
+type CollectorProcessor struct {
+  processorMap map[string]thrift.TProcessorFunction
+  handler Collector
+}
+
+func (p *CollectorProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+  p.processorMap[key] = processor
+}
+
+func (p *CollectorProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+  processor, ok = p.processorMap[key]
+  return processor, ok
+}
+
+func (p *CollectorProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+  return p.processorMap
+}
+
+func NewCollectorProcessor(handler Collector) *CollectorProcessor {
+
+  self15 := &CollectorProcessor{handler:handler, processorMap:make(map[string]thrift.TProcessorFunction)}
+  self15.processorMap["submitBatches"] = &collectorProcessorSubmitBatches{handler:handler}
+return self15
+}
+
+func (p *CollectorProcessor) Process(ctx context.Context, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  name, _, seqId, err2 := iprot.ReadMessageBegin(ctx)
+  if err2 != nil { return false, thrift.WrapTException(err2) }
+  if processor, ok := p.GetProcessorFunction(name); ok {
+    return processor.Process(ctx, seqId, iprot, oprot)
+  }
+  iprot.Skip(ctx, thrift.STRUCT)
+  iprot.ReadMessageEnd(ctx)
+  x16 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function " + name)
+  oprot.WriteMessageBegin(ctx, name, thrift.EXCEPTION, seqId)
+  x16.Write(ctx, oprot)
+  oprot.WriteMessageEnd(ctx)
+  oprot.Flush(ctx)
+  return false, x16
+
+}
+
+type collectorProcessorSubmitBatches struct {
+  handler Collector
+}
+
+func (p *collectorProcessorSubmitBatches) Process(ctx context.Context, seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  args := CollectorSubmitBatchesArgs{}
+  var err2 error
+  if err2 = args.Read(ctx, iprot); err2 != nil {
+    iprot.ReadMessageEnd(ctx)
+    x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err2.Error())
+    oprot.WriteMessageBegin(ctx, "submitBatches", thrift.EXCEPTION, seqId)
+    x.Write(ctx, oprot)
+    oprot.WriteMessageEnd(ctx)
+    oprot.Flush(ctx)
+    return false, thrift.WrapTException(err2)
+  }
+  iprot.ReadMessageEnd(ctx)
+
+  tickerCancel := func() {}
+  // Start a goroutine to do server side connectivity check.
+  if thrift.ServerConnectivityCheckInterval > 0 {
+    var cancel context.CancelFunc
+    ctx, cancel = context.WithCancel(ctx)
+    defer cancel()
+    var tickerCtx context.Context
+    tickerCtx, tickerCancel = context.WithCancel(context.Background())
+    defer tickerCancel()
+    go func(ctx context.Context, cancel context.CancelFunc) {
+      ticker := time.NewTicker(thrift.ServerConnectivityCheckInterval)
+      defer ticker.Stop()
+      for {
+        select {
+        case <-ctx.Done():
+          return
+        case <-ticker.C:
+          if !iprot.Transport().IsOpen() {
+            cancel()
+            return
+          }
+        }
+      }
+    }(tickerCtx, cancel)
+  }
+
+  result := CollectorSubmitBatchesResult{}
+  var retval []*BatchSubmitResponse
+  if retval, err2 = p.handler.SubmitBatches(ctx, args.Batches); err2 != nil {
+    tickerCancel()
+    if err2 == thrift.ErrAbandonRequest {
+      return false, thrift.WrapTException(err2)
+    }
+    x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing submitBatches: " + err2.Error())
+    oprot.WriteMessageBegin(ctx, "submitBatches", thrift.EXCEPTION, seqId)
+    x.Write(ctx, oprot)
+    oprot.WriteMessageEnd(ctx)
+    oprot.Flush(ctx)
+    return true, thrift.WrapTException(err2)
+  } else {
+    result.Success = retval
+  }
+  tickerCancel()
+  if err2 = oprot.WriteMessageBegin(ctx, "submitBatches", thrift.REPLY, seqId); err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = result.Write(ctx, oprot); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = oprot.WriteMessageEnd(ctx); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = oprot.Flush(ctx); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err != nil {
+    return
+  }
+  return true, err
+}
+
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - Batches
+type CollectorSubmitBatchesArgs struct {
+  Batches []*Batch `thrift:"batches,1" db:"batches" json:"batches"`
+}
+
+func NewCollectorSubmitBatchesArgs() *CollectorSubmitBatchesArgs {
+  return &CollectorSubmitBatchesArgs{}
+}
+
+
+func (p *CollectorSubmitBatchesArgs) GetBatches() []*Batch {
+  return p.Batches
+}
+func (p *CollectorSubmitBatchesArgs) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *CollectorSubmitBatchesArgs)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Batch, 0, size)
+  p.Batches =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem17 := &Batch{}
+    if err := _elem17.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem17), err)
+    }
+    p.Batches = append(p.Batches, _elem17)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *CollectorSubmitBatchesArgs) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "submitBatches_args"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *CollectorSubmitBatchesArgs) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "batches", thrift.LIST, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:batches: ", p), err) }
+  if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Batches)); err != nil {
+    return thrift.PrependError("error writing list begin: ", err)
+  }
+  for _, v := range p.Batches {
+    if err := v.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+    }
+  }
+  if err := oprot.WriteListEnd(ctx); err != nil {
+    return thrift.PrependError("error writing list end: ", err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:batches: ", p), err) }
+  return err
+}
+
+func (p *CollectorSubmitBatchesArgs) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("CollectorSubmitBatchesArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Success
+type CollectorSubmitBatchesResult struct {
+  Success []*BatchSubmitResponse `thrift:"success,0" db:"success" json:"success,omitempty"`
+}
+
+func NewCollectorSubmitBatchesResult() *CollectorSubmitBatchesResult {
+  return &CollectorSubmitBatchesResult{}
+}
+
+var CollectorSubmitBatchesResult_Success_DEFAULT []*BatchSubmitResponse
+
+func (p *CollectorSubmitBatchesResult) GetSuccess() []*BatchSubmitResponse {
+  return p.Success
+}
+func (p *CollectorSubmitBatchesResult) IsSetSuccess() bool {
+  return p.Success != nil
+}
+
+func (p *CollectorSubmitBatchesResult) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 0:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField0(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *CollectorSubmitBatchesResult)  ReadField0(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*BatchSubmitResponse, 0, size)
+  p.Success =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem18 := &BatchSubmitResponse{}
+    if err := _elem18.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem18), err)
+    }
+    p.Success = append(p.Success, _elem18)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *CollectorSubmitBatchesResult) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "submitBatches_result"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField0(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *CollectorSubmitBatchesResult) writeField0(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetSuccess() {
+    if err := oprot.WriteFieldBegin(ctx, "success", thrift.LIST, 0); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err) }
+    if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Success)); err != nil {
+      return thrift.PrependError("error writing list begin: ", err)
+    }
+    for _, v := range p.Success {
+      if err := v.Write(ctx, oprot); err != nil {
+        return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+      }
+    }
+    if err := oprot.WriteListEnd(ctx); err != nil {
+      return thrift.PrependError("error writing list end: ", err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err) }
+  }
+  return err
+}
+
+func (p *CollectorSubmitBatchesResult) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("CollectorSubmitBatchesResult(%+v)", *p)
+}
+
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/GoUnusedProtection__.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/GoUnusedProtection__.go
new file mode 100644
index 0000000..015ad4b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/GoUnusedProtection__.go
@@ -0,0 +1,6 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package sampling
+
+var GoUnusedProtection__ int;
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/sampling-consts.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/sampling-consts.go
new file mode 100644
index 0000000..5cc7628
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/sampling-consts.go
@@ -0,0 +1,23 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package sampling
+
+import(
+	"bytes"
+	"context"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+
+func init() {
+}
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/sampling.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/sampling.go
new file mode 100644
index 0000000..3bffa5b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/sampling/sampling.go
@@ -0,0 +1,1323 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package sampling
+
+import(
+	"bytes"
+	"context"
+	"database/sql/driver"
+	"errors"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+type SamplingStrategyType int64
+const (
+  SamplingStrategyType_PROBABILISTIC SamplingStrategyType = 0
+  SamplingStrategyType_RATE_LIMITING SamplingStrategyType = 1
+)
+
+func (p SamplingStrategyType) String() string {
+  switch p {
+  case SamplingStrategyType_PROBABILISTIC: return "PROBABILISTIC"
+  case SamplingStrategyType_RATE_LIMITING: return "RATE_LIMITING"
+  }
+  return "<UNSET>"
+}
+
+func SamplingStrategyTypeFromString(s string) (SamplingStrategyType, error) {
+  switch s {
+  case "PROBABILISTIC": return SamplingStrategyType_PROBABILISTIC, nil 
+  case "RATE_LIMITING": return SamplingStrategyType_RATE_LIMITING, nil 
+  }
+  return SamplingStrategyType(0), fmt.Errorf("not a valid SamplingStrategyType string")
+}
+
+
+func SamplingStrategyTypePtr(v SamplingStrategyType) *SamplingStrategyType { return &v }
+
+func (p SamplingStrategyType) MarshalText() ([]byte, error) {
+return []byte(p.String()), nil
+}
+
+func (p *SamplingStrategyType) UnmarshalText(text []byte) error {
+q, err := SamplingStrategyTypeFromString(string(text))
+if (err != nil) {
+return err
+}
+*p = q
+return nil
+}
+
+func (p *SamplingStrategyType) Scan(value interface{}) error {
+v, ok := value.(int64)
+if !ok {
+return errors.New("Scan value is not int64")
+}
+*p = SamplingStrategyType(v)
+return nil
+}
+
+func (p * SamplingStrategyType) Value() (driver.Value, error) {
+  if p == nil {
+    return nil, nil
+  }
+return int64(*p), nil
+}
+// Attributes:
+//  - SamplingRate
+type ProbabilisticSamplingStrategy struct {
+  SamplingRate float64 `thrift:"samplingRate,1,required" db:"samplingRate" json:"samplingRate"`
+}
+
+func NewProbabilisticSamplingStrategy() *ProbabilisticSamplingStrategy {
+  return &ProbabilisticSamplingStrategy{}
+}
+
+
+func (p *ProbabilisticSamplingStrategy) GetSamplingRate() float64 {
+  return p.SamplingRate
+}
+func (p *ProbabilisticSamplingStrategy) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetSamplingRate bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.DOUBLE {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetSamplingRate = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetSamplingRate{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field SamplingRate is not set"));
+  }
+  return nil
+}
+
+func (p *ProbabilisticSamplingStrategy)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadDouble(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.SamplingRate = v
+}
+  return nil
+}
+
+func (p *ProbabilisticSamplingStrategy) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "ProbabilisticSamplingStrategy"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *ProbabilisticSamplingStrategy) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "samplingRate", thrift.DOUBLE, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:samplingRate: ", p), err) }
+  if err := oprot.WriteDouble(ctx, float64(p.SamplingRate)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.samplingRate (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:samplingRate: ", p), err) }
+  return err
+}
+
+func (p *ProbabilisticSamplingStrategy) Equals(other *ProbabilisticSamplingStrategy) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.SamplingRate != other.SamplingRate { return false }
+  return true
+}
+
+func (p *ProbabilisticSamplingStrategy) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("ProbabilisticSamplingStrategy(%+v)", *p)
+}
+
+// Attributes:
+//  - MaxTracesPerSecond
+type RateLimitingSamplingStrategy struct {
+  MaxTracesPerSecond int16 `thrift:"maxTracesPerSecond,1,required" db:"maxTracesPerSecond" json:"maxTracesPerSecond"`
+}
+
+func NewRateLimitingSamplingStrategy() *RateLimitingSamplingStrategy {
+  return &RateLimitingSamplingStrategy{}
+}
+
+
+func (p *RateLimitingSamplingStrategy) GetMaxTracesPerSecond() int16 {
+  return p.MaxTracesPerSecond
+}
+func (p *RateLimitingSamplingStrategy) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetMaxTracesPerSecond bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I16 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetMaxTracesPerSecond = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetMaxTracesPerSecond{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field MaxTracesPerSecond is not set"));
+  }
+  return nil
+}
+
+func (p *RateLimitingSamplingStrategy)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI16(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.MaxTracesPerSecond = v
+}
+  return nil
+}
+
+func (p *RateLimitingSamplingStrategy) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "RateLimitingSamplingStrategy"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *RateLimitingSamplingStrategy) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "maxTracesPerSecond", thrift.I16, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:maxTracesPerSecond: ", p), err) }
+  if err := oprot.WriteI16(ctx, int16(p.MaxTracesPerSecond)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.maxTracesPerSecond (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:maxTracesPerSecond: ", p), err) }
+  return err
+}
+
+func (p *RateLimitingSamplingStrategy) Equals(other *RateLimitingSamplingStrategy) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.MaxTracesPerSecond != other.MaxTracesPerSecond { return false }
+  return true
+}
+
+func (p *RateLimitingSamplingStrategy) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("RateLimitingSamplingStrategy(%+v)", *p)
+}
+
+// Attributes:
+//  - Operation
+//  - ProbabilisticSampling
+type OperationSamplingStrategy struct {
+  Operation string `thrift:"operation,1,required" db:"operation" json:"operation"`
+  ProbabilisticSampling *ProbabilisticSamplingStrategy `thrift:"probabilisticSampling,2,required" db:"probabilisticSampling" json:"probabilisticSampling"`
+}
+
+func NewOperationSamplingStrategy() *OperationSamplingStrategy {
+  return &OperationSamplingStrategy{}
+}
+
+
+func (p *OperationSamplingStrategy) GetOperation() string {
+  return p.Operation
+}
+var OperationSamplingStrategy_ProbabilisticSampling_DEFAULT *ProbabilisticSamplingStrategy
+func (p *OperationSamplingStrategy) GetProbabilisticSampling() *ProbabilisticSamplingStrategy {
+  if !p.IsSetProbabilisticSampling() {
+    return OperationSamplingStrategy_ProbabilisticSampling_DEFAULT
+  }
+return p.ProbabilisticSampling
+}
+func (p *OperationSamplingStrategy) IsSetProbabilisticSampling() bool {
+  return p.ProbabilisticSampling != nil
+}
+
+func (p *OperationSamplingStrategy) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetOperation bool = false;
+  var issetProbabilisticSampling bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetOperation = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetProbabilisticSampling = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetOperation{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Operation is not set"));
+  }
+  if !issetProbabilisticSampling{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field ProbabilisticSampling is not set"));
+  }
+  return nil
+}
+
+func (p *OperationSamplingStrategy)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.Operation = v
+}
+  return nil
+}
+
+func (p *OperationSamplingStrategy)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  p.ProbabilisticSampling = &ProbabilisticSamplingStrategy{}
+  if err := p.ProbabilisticSampling.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.ProbabilisticSampling), err)
+  }
+  return nil
+}
+
+func (p *OperationSamplingStrategy) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "OperationSamplingStrategy"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *OperationSamplingStrategy) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "operation", thrift.STRING, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:operation: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.Operation)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.operation (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:operation: ", p), err) }
+  return err
+}
+
+func (p *OperationSamplingStrategy) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "probabilisticSampling", thrift.STRUCT, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:probabilisticSampling: ", p), err) }
+  if err := p.ProbabilisticSampling.Write(ctx, oprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.ProbabilisticSampling), err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:probabilisticSampling: ", p), err) }
+  return err
+}
+
+func (p *OperationSamplingStrategy) Equals(other *OperationSamplingStrategy) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.Operation != other.Operation { return false }
+  if !p.ProbabilisticSampling.Equals(other.ProbabilisticSampling) { return false }
+  return true
+}
+
+func (p *OperationSamplingStrategy) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("OperationSamplingStrategy(%+v)", *p)
+}
+
+// Attributes:
+//  - DefaultSamplingProbability
+//  - DefaultLowerBoundTracesPerSecond
+//  - PerOperationStrategies
+//  - DefaultUpperBoundTracesPerSecond
+type PerOperationSamplingStrategies struct {
+  DefaultSamplingProbability float64 `thrift:"defaultSamplingProbability,1,required" db:"defaultSamplingProbability" json:"defaultSamplingProbability"`
+  DefaultLowerBoundTracesPerSecond float64 `thrift:"defaultLowerBoundTracesPerSecond,2,required" db:"defaultLowerBoundTracesPerSecond" json:"defaultLowerBoundTracesPerSecond"`
+  PerOperationStrategies []*OperationSamplingStrategy `thrift:"perOperationStrategies,3,required" db:"perOperationStrategies" json:"perOperationStrategies"`
+  DefaultUpperBoundTracesPerSecond *float64 `thrift:"defaultUpperBoundTracesPerSecond,4" db:"defaultUpperBoundTracesPerSecond" json:"defaultUpperBoundTracesPerSecond,omitempty"`
+}
+
+func NewPerOperationSamplingStrategies() *PerOperationSamplingStrategies {
+  return &PerOperationSamplingStrategies{}
+}
+
+
+func (p *PerOperationSamplingStrategies) GetDefaultSamplingProbability() float64 {
+  return p.DefaultSamplingProbability
+}
+
+func (p *PerOperationSamplingStrategies) GetDefaultLowerBoundTracesPerSecond() float64 {
+  return p.DefaultLowerBoundTracesPerSecond
+}
+
+func (p *PerOperationSamplingStrategies) GetPerOperationStrategies() []*OperationSamplingStrategy {
+  return p.PerOperationStrategies
+}
+var PerOperationSamplingStrategies_DefaultUpperBoundTracesPerSecond_DEFAULT float64
+func (p *PerOperationSamplingStrategies) GetDefaultUpperBoundTracesPerSecond() float64 {
+  if !p.IsSetDefaultUpperBoundTracesPerSecond() {
+    return PerOperationSamplingStrategies_DefaultUpperBoundTracesPerSecond_DEFAULT
+  }
+return *p.DefaultUpperBoundTracesPerSecond
+}
+func (p *PerOperationSamplingStrategies) IsSetDefaultUpperBoundTracesPerSecond() bool {
+  return p.DefaultUpperBoundTracesPerSecond != nil
+}
+
+func (p *PerOperationSamplingStrategies) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetDefaultSamplingProbability bool = false;
+  var issetDefaultLowerBoundTracesPerSecond bool = false;
+  var issetPerOperationStrategies bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.DOUBLE {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetDefaultSamplingProbability = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.DOUBLE {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+        issetDefaultLowerBoundTracesPerSecond = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+        issetPerOperationStrategies = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.DOUBLE {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetDefaultSamplingProbability{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field DefaultSamplingProbability is not set"));
+  }
+  if !issetDefaultLowerBoundTracesPerSecond{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field DefaultLowerBoundTracesPerSecond is not set"));
+  }
+  if !issetPerOperationStrategies{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field PerOperationStrategies is not set"));
+  }
+  return nil
+}
+
+func (p *PerOperationSamplingStrategies)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadDouble(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.DefaultSamplingProbability = v
+}
+  return nil
+}
+
+func (p *PerOperationSamplingStrategies)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadDouble(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  p.DefaultLowerBoundTracesPerSecond = v
+}
+  return nil
+}
+
+func (p *PerOperationSamplingStrategies)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*OperationSamplingStrategy, 0, size)
+  p.PerOperationStrategies =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem0 := &OperationSamplingStrategy{}
+    if err := _elem0.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem0), err)
+    }
+    p.PerOperationStrategies = append(p.PerOperationStrategies, _elem0)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *PerOperationSamplingStrategies)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadDouble(ctx); err != nil {
+  return thrift.PrependError("error reading field 4: ", err)
+} else {
+  p.DefaultUpperBoundTracesPerSecond = &v
+}
+  return nil
+}
+
+func (p *PerOperationSamplingStrategies) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "PerOperationSamplingStrategies"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *PerOperationSamplingStrategies) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "defaultSamplingProbability", thrift.DOUBLE, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:defaultSamplingProbability: ", p), err) }
+  if err := oprot.WriteDouble(ctx, float64(p.DefaultSamplingProbability)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.defaultSamplingProbability (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:defaultSamplingProbability: ", p), err) }
+  return err
+}
+
+func (p *PerOperationSamplingStrategies) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "defaultLowerBoundTracesPerSecond", thrift.DOUBLE, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:defaultLowerBoundTracesPerSecond: ", p), err) }
+  if err := oprot.WriteDouble(ctx, float64(p.DefaultLowerBoundTracesPerSecond)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.defaultLowerBoundTracesPerSecond (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:defaultLowerBoundTracesPerSecond: ", p), err) }
+  return err
+}
+
+func (p *PerOperationSamplingStrategies) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "perOperationStrategies", thrift.LIST, 3); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:perOperationStrategies: ", p), err) }
+  if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.PerOperationStrategies)); err != nil {
+    return thrift.PrependError("error writing list begin: ", err)
+  }
+  for _, v := range p.PerOperationStrategies {
+    if err := v.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+    }
+  }
+  if err := oprot.WriteListEnd(ctx); err != nil {
+    return thrift.PrependError("error writing list end: ", err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 3:perOperationStrategies: ", p), err) }
+  return err
+}
+
+func (p *PerOperationSamplingStrategies) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetDefaultUpperBoundTracesPerSecond() {
+    if err := oprot.WriteFieldBegin(ctx, "defaultUpperBoundTracesPerSecond", thrift.DOUBLE, 4); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:defaultUpperBoundTracesPerSecond: ", p), err) }
+    if err := oprot.WriteDouble(ctx, float64(*p.DefaultUpperBoundTracesPerSecond)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.defaultUpperBoundTracesPerSecond (4) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 4:defaultUpperBoundTracesPerSecond: ", p), err) }
+  }
+  return err
+}
+
+func (p *PerOperationSamplingStrategies) Equals(other *PerOperationSamplingStrategies) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.DefaultSamplingProbability != other.DefaultSamplingProbability { return false }
+  if p.DefaultLowerBoundTracesPerSecond != other.DefaultLowerBoundTracesPerSecond { return false }
+  if len(p.PerOperationStrategies) != len(other.PerOperationStrategies) { return false }
+  for i, _tgt := range p.PerOperationStrategies {
+    _src1 := other.PerOperationStrategies[i]
+    if !_tgt.Equals(_src1) { return false }
+  }
+  if p.DefaultUpperBoundTracesPerSecond != other.DefaultUpperBoundTracesPerSecond {
+    if p.DefaultUpperBoundTracesPerSecond == nil || other.DefaultUpperBoundTracesPerSecond == nil {
+      return false
+    }
+    if (*p.DefaultUpperBoundTracesPerSecond) != (*other.DefaultUpperBoundTracesPerSecond) { return false }
+  }
+  return true
+}
+
+func (p *PerOperationSamplingStrategies) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("PerOperationSamplingStrategies(%+v)", *p)
+}
+
+// Attributes:
+//  - StrategyType
+//  - ProbabilisticSampling
+//  - RateLimitingSampling
+//  - OperationSampling
+type SamplingStrategyResponse struct {
+  StrategyType SamplingStrategyType `thrift:"strategyType,1,required" db:"strategyType" json:"strategyType"`
+  ProbabilisticSampling *ProbabilisticSamplingStrategy `thrift:"probabilisticSampling,2" db:"probabilisticSampling" json:"probabilisticSampling,omitempty"`
+  RateLimitingSampling *RateLimitingSamplingStrategy `thrift:"rateLimitingSampling,3" db:"rateLimitingSampling" json:"rateLimitingSampling,omitempty"`
+  OperationSampling *PerOperationSamplingStrategies `thrift:"operationSampling,4" db:"operationSampling" json:"operationSampling,omitempty"`
+}
+
+func NewSamplingStrategyResponse() *SamplingStrategyResponse {
+  return &SamplingStrategyResponse{}
+}
+
+
+func (p *SamplingStrategyResponse) GetStrategyType() SamplingStrategyType {
+  return p.StrategyType
+}
+var SamplingStrategyResponse_ProbabilisticSampling_DEFAULT *ProbabilisticSamplingStrategy
+func (p *SamplingStrategyResponse) GetProbabilisticSampling() *ProbabilisticSamplingStrategy {
+  if !p.IsSetProbabilisticSampling() {
+    return SamplingStrategyResponse_ProbabilisticSampling_DEFAULT
+  }
+return p.ProbabilisticSampling
+}
+var SamplingStrategyResponse_RateLimitingSampling_DEFAULT *RateLimitingSamplingStrategy
+func (p *SamplingStrategyResponse) GetRateLimitingSampling() *RateLimitingSamplingStrategy {
+  if !p.IsSetRateLimitingSampling() {
+    return SamplingStrategyResponse_RateLimitingSampling_DEFAULT
+  }
+return p.RateLimitingSampling
+}
+var SamplingStrategyResponse_OperationSampling_DEFAULT *PerOperationSamplingStrategies
+func (p *SamplingStrategyResponse) GetOperationSampling() *PerOperationSamplingStrategies {
+  if !p.IsSetOperationSampling() {
+    return SamplingStrategyResponse_OperationSampling_DEFAULT
+  }
+return p.OperationSampling
+}
+func (p *SamplingStrategyResponse) IsSetProbabilisticSampling() bool {
+  return p.ProbabilisticSampling != nil
+}
+
+func (p *SamplingStrategyResponse) IsSetRateLimitingSampling() bool {
+  return p.RateLimitingSampling != nil
+}
+
+func (p *SamplingStrategyResponse) IsSetOperationSampling() bool {
+  return p.OperationSampling != nil
+}
+
+func (p *SamplingStrategyResponse) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetStrategyType bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I32 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetStrategyType = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetStrategyType{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field StrategyType is not set"));
+  }
+  return nil
+}
+
+func (p *SamplingStrategyResponse)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI32(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  temp := SamplingStrategyType(v)
+  p.StrategyType = temp
+}
+  return nil
+}
+
+func (p *SamplingStrategyResponse)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  p.ProbabilisticSampling = &ProbabilisticSamplingStrategy{}
+  if err := p.ProbabilisticSampling.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.ProbabilisticSampling), err)
+  }
+  return nil
+}
+
+func (p *SamplingStrategyResponse)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  p.RateLimitingSampling = &RateLimitingSamplingStrategy{}
+  if err := p.RateLimitingSampling.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.RateLimitingSampling), err)
+  }
+  return nil
+}
+
+func (p *SamplingStrategyResponse)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  p.OperationSampling = &PerOperationSamplingStrategies{}
+  if err := p.OperationSampling.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.OperationSampling), err)
+  }
+  return nil
+}
+
+func (p *SamplingStrategyResponse) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "SamplingStrategyResponse"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *SamplingStrategyResponse) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "strategyType", thrift.I32, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:strategyType: ", p), err) }
+  if err := oprot.WriteI32(ctx, int32(p.StrategyType)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.strategyType (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:strategyType: ", p), err) }
+  return err
+}
+
+func (p *SamplingStrategyResponse) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetProbabilisticSampling() {
+    if err := oprot.WriteFieldBegin(ctx, "probabilisticSampling", thrift.STRUCT, 2); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:probabilisticSampling: ", p), err) }
+    if err := p.ProbabilisticSampling.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.ProbabilisticSampling), err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 2:probabilisticSampling: ", p), err) }
+  }
+  return err
+}
+
+func (p *SamplingStrategyResponse) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetRateLimitingSampling() {
+    if err := oprot.WriteFieldBegin(ctx, "rateLimitingSampling", thrift.STRUCT, 3); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:rateLimitingSampling: ", p), err) }
+    if err := p.RateLimitingSampling.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.RateLimitingSampling), err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 3:rateLimitingSampling: ", p), err) }
+  }
+  return err
+}
+
+func (p *SamplingStrategyResponse) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetOperationSampling() {
+    if err := oprot.WriteFieldBegin(ctx, "operationSampling", thrift.STRUCT, 4); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:operationSampling: ", p), err) }
+    if err := p.OperationSampling.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.OperationSampling), err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 4:operationSampling: ", p), err) }
+  }
+  return err
+}
+
+func (p *SamplingStrategyResponse) Equals(other *SamplingStrategyResponse) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.StrategyType != other.StrategyType { return false }
+  if !p.ProbabilisticSampling.Equals(other.ProbabilisticSampling) { return false }
+  if !p.RateLimitingSampling.Equals(other.RateLimitingSampling) { return false }
+  if !p.OperationSampling.Equals(other.OperationSampling) { return false }
+  return true
+}
+
+func (p *SamplingStrategyResponse) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("SamplingStrategyResponse(%+v)", *p)
+}
+
+type SamplingManager interface {
+  // Parameters:
+  //  - ServiceName
+  GetSamplingStrategy(ctx context.Context, serviceName string) (_r *SamplingStrategyResponse, _err error)
+}
+
+type SamplingManagerClient struct {
+  c thrift.TClient
+  meta thrift.ResponseMeta
+}
+
+func NewSamplingManagerClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *SamplingManagerClient {
+  return &SamplingManagerClient{
+    c: thrift.NewTStandardClient(f.GetProtocol(t), f.GetProtocol(t)),
+  }
+}
+
+func NewSamplingManagerClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *SamplingManagerClient {
+  return &SamplingManagerClient{
+    c: thrift.NewTStandardClient(iprot, oprot),
+  }
+}
+
+func NewSamplingManagerClient(c thrift.TClient) *SamplingManagerClient {
+  return &SamplingManagerClient{
+    c: c,
+  }
+}
+
+func (p *SamplingManagerClient) Client_() thrift.TClient {
+  return p.c
+}
+
+func (p *SamplingManagerClient) LastResponseMeta_() thrift.ResponseMeta {
+  return p.meta
+}
+
+func (p *SamplingManagerClient) SetLastResponseMeta_(meta thrift.ResponseMeta) {
+  p.meta = meta
+}
+
+// Parameters:
+//  - ServiceName
+func (p *SamplingManagerClient) GetSamplingStrategy(ctx context.Context, serviceName string) (_r *SamplingStrategyResponse, _err error) {
+  var _args2 SamplingManagerGetSamplingStrategyArgs
+  _args2.ServiceName = serviceName
+  var _result4 SamplingManagerGetSamplingStrategyResult
+  var _meta3 thrift.ResponseMeta
+  _meta3, _err = p.Client_().Call(ctx, "getSamplingStrategy", &_args2, &_result4)
+  p.SetLastResponseMeta_(_meta3)
+  if _err != nil {
+    return
+  }
+  return _result4.GetSuccess(), nil
+}
+
+type SamplingManagerProcessor struct {
+  processorMap map[string]thrift.TProcessorFunction
+  handler SamplingManager
+}
+
+func (p *SamplingManagerProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+  p.processorMap[key] = processor
+}
+
+func (p *SamplingManagerProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+  processor, ok = p.processorMap[key]
+  return processor, ok
+}
+
+func (p *SamplingManagerProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+  return p.processorMap
+}
+
+func NewSamplingManagerProcessor(handler SamplingManager) *SamplingManagerProcessor {
+
+  self5 := &SamplingManagerProcessor{handler:handler, processorMap:make(map[string]thrift.TProcessorFunction)}
+  self5.processorMap["getSamplingStrategy"] = &samplingManagerProcessorGetSamplingStrategy{handler:handler}
+return self5
+}
+
+func (p *SamplingManagerProcessor) Process(ctx context.Context, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  name, _, seqId, err2 := iprot.ReadMessageBegin(ctx)
+  if err2 != nil { return false, thrift.WrapTException(err2) }
+  if processor, ok := p.GetProcessorFunction(name); ok {
+    return processor.Process(ctx, seqId, iprot, oprot)
+  }
+  iprot.Skip(ctx, thrift.STRUCT)
+  iprot.ReadMessageEnd(ctx)
+  x6 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function " + name)
+  oprot.WriteMessageBegin(ctx, name, thrift.EXCEPTION, seqId)
+  x6.Write(ctx, oprot)
+  oprot.WriteMessageEnd(ctx)
+  oprot.Flush(ctx)
+  return false, x6
+
+}
+
+type samplingManagerProcessorGetSamplingStrategy struct {
+  handler SamplingManager
+}
+
+func (p *samplingManagerProcessorGetSamplingStrategy) Process(ctx context.Context, seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  args := SamplingManagerGetSamplingStrategyArgs{}
+  var err2 error
+  if err2 = args.Read(ctx, iprot); err2 != nil {
+    iprot.ReadMessageEnd(ctx)
+    x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err2.Error())
+    oprot.WriteMessageBegin(ctx, "getSamplingStrategy", thrift.EXCEPTION, seqId)
+    x.Write(ctx, oprot)
+    oprot.WriteMessageEnd(ctx)
+    oprot.Flush(ctx)
+    return false, thrift.WrapTException(err2)
+  }
+  iprot.ReadMessageEnd(ctx)
+
+  tickerCancel := func() {}
+  // Start a goroutine to do server side connectivity check.
+  if thrift.ServerConnectivityCheckInterval > 0 {
+    var cancel context.CancelFunc
+    ctx, cancel = context.WithCancel(ctx)
+    defer cancel()
+    var tickerCtx context.Context
+    tickerCtx, tickerCancel = context.WithCancel(context.Background())
+    defer tickerCancel()
+    go func(ctx context.Context, cancel context.CancelFunc) {
+      ticker := time.NewTicker(thrift.ServerConnectivityCheckInterval)
+      defer ticker.Stop()
+      for {
+        select {
+        case <-ctx.Done():
+          return
+        case <-ticker.C:
+          if !iprot.Transport().IsOpen() {
+            cancel()
+            return
+          }
+        }
+      }
+    }(tickerCtx, cancel)
+  }
+
+  result := SamplingManagerGetSamplingStrategyResult{}
+  var retval *SamplingStrategyResponse
+  if retval, err2 = p.handler.GetSamplingStrategy(ctx, args.ServiceName); err2 != nil {
+    tickerCancel()
+    if err2 == thrift.ErrAbandonRequest {
+      return false, thrift.WrapTException(err2)
+    }
+    x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing getSamplingStrategy: " + err2.Error())
+    oprot.WriteMessageBegin(ctx, "getSamplingStrategy", thrift.EXCEPTION, seqId)
+    x.Write(ctx, oprot)
+    oprot.WriteMessageEnd(ctx)
+    oprot.Flush(ctx)
+    return true, thrift.WrapTException(err2)
+  } else {
+    result.Success = retval
+  }
+  tickerCancel()
+  if err2 = oprot.WriteMessageBegin(ctx, "getSamplingStrategy", thrift.REPLY, seqId); err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = result.Write(ctx, oprot); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = oprot.WriteMessageEnd(ctx); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = oprot.Flush(ctx); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err != nil {
+    return
+  }
+  return true, err
+}
+
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - ServiceName
+type SamplingManagerGetSamplingStrategyArgs struct {
+  ServiceName string `thrift:"serviceName,1" db:"serviceName" json:"serviceName"`
+}
+
+func NewSamplingManagerGetSamplingStrategyArgs() *SamplingManagerGetSamplingStrategyArgs {
+  return &SamplingManagerGetSamplingStrategyArgs{}
+}
+
+
+func (p *SamplingManagerGetSamplingStrategyArgs) GetServiceName() string {
+  return p.ServiceName
+}
+func (p *SamplingManagerGetSamplingStrategyArgs) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.ServiceName = v
+}
+  return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "getSamplingStrategy_args"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "serviceName", thrift.STRING, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:serviceName: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.ServiceName)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.serviceName (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:serviceName: ", p), err) }
+  return err
+}
+
+func (p *SamplingManagerGetSamplingStrategyArgs) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("SamplingManagerGetSamplingStrategyArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Success
+type SamplingManagerGetSamplingStrategyResult struct {
+  Success *SamplingStrategyResponse `thrift:"success,0" db:"success" json:"success,omitempty"`
+}
+
+func NewSamplingManagerGetSamplingStrategyResult() *SamplingManagerGetSamplingStrategyResult {
+  return &SamplingManagerGetSamplingStrategyResult{}
+}
+
+var SamplingManagerGetSamplingStrategyResult_Success_DEFAULT *SamplingStrategyResponse
+func (p *SamplingManagerGetSamplingStrategyResult) GetSuccess() *SamplingStrategyResponse {
+  if !p.IsSetSuccess() {
+    return SamplingManagerGetSamplingStrategyResult_Success_DEFAULT
+  }
+return p.Success
+}
+func (p *SamplingManagerGetSamplingStrategyResult) IsSetSuccess() bool {
+  return p.Success != nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 0:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField0(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult)  ReadField0(ctx context.Context, iprot thrift.TProtocol) error {
+  p.Success = &SamplingStrategyResponse{}
+  if err := p.Success.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Success), err)
+  }
+  return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "getSamplingStrategy_result"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField0(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) writeField0(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetSuccess() {
+    if err := oprot.WriteFieldBegin(ctx, "success", thrift.STRUCT, 0); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err) }
+    if err := p.Success.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Success), err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err) }
+  }
+  return err
+}
+
+func (p *SamplingManagerGetSamplingStrategyResult) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("SamplingManagerGetSamplingStrategyResult(%+v)", *p)
+}
+
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/GoUnusedProtection__.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/GoUnusedProtection__.go
new file mode 100644
index 0000000..ebf4301
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/GoUnusedProtection__.go
@@ -0,0 +1,6 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package zipkincore
+
+var GoUnusedProtection__ int;
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincore-consts.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincore-consts.go
new file mode 100644
index 0000000..7a924b9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincore-consts.go
@@ -0,0 +1,39 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package zipkincore
+
+import(
+	"bytes"
+	"context"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+const CLIENT_SEND = "cs"
+const CLIENT_RECV = "cr"
+const SERVER_SEND = "ss"
+const SERVER_RECV = "sr"
+const MESSAGE_SEND = "ms"
+const MESSAGE_RECV = "mr"
+const WIRE_SEND = "ws"
+const WIRE_RECV = "wr"
+const CLIENT_SEND_FRAGMENT = "csf"
+const CLIENT_RECV_FRAGMENT = "crf"
+const SERVER_SEND_FRAGMENT = "ssf"
+const SERVER_RECV_FRAGMENT = "srf"
+const LOCAL_COMPONENT = "lc"
+const CLIENT_ADDR = "ca"
+const SERVER_ADDR = "sa"
+const MESSAGE_ADDR = "ma"
+
+func init() {
+}
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincore.go b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincore.go
new file mode 100644
index 0000000..b00ecd2
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift-gen/zipkincore/zipkincore.go
@@ -0,0 +1,1853 @@
+// Code generated by Thrift Compiler (0.14.1). DO NOT EDIT.
+
+package zipkincore
+
+import(
+	"bytes"
+	"context"
+	"database/sql/driver"
+	"errors"
+	"fmt"
+	"time"
+	"github.com/uber/jaeger-client-go/thrift"
+)
+
+// (needed to ensure safety because of naive import list construction.)
+var _ = thrift.ZERO
+var _ = fmt.Printf
+var _ = context.Background
+var _ = time.Now
+var _ = bytes.Equal
+
+type AnnotationType int64
+const (
+  AnnotationType_BOOL AnnotationType = 0
+  AnnotationType_BYTES AnnotationType = 1
+  AnnotationType_I16 AnnotationType = 2
+  AnnotationType_I32 AnnotationType = 3
+  AnnotationType_I64 AnnotationType = 4
+  AnnotationType_DOUBLE AnnotationType = 5
+  AnnotationType_STRING AnnotationType = 6
+)
+
+func (p AnnotationType) String() string {
+  switch p {
+  case AnnotationType_BOOL: return "BOOL"
+  case AnnotationType_BYTES: return "BYTES"
+  case AnnotationType_I16: return "I16"
+  case AnnotationType_I32: return "I32"
+  case AnnotationType_I64: return "I64"
+  case AnnotationType_DOUBLE: return "DOUBLE"
+  case AnnotationType_STRING: return "STRING"
+  }
+  return "<UNSET>"
+}
+
+func AnnotationTypeFromString(s string) (AnnotationType, error) {
+  switch s {
+  case "BOOL": return AnnotationType_BOOL, nil 
+  case "BYTES": return AnnotationType_BYTES, nil 
+  case "I16": return AnnotationType_I16, nil 
+  case "I32": return AnnotationType_I32, nil 
+  case "I64": return AnnotationType_I64, nil 
+  case "DOUBLE": return AnnotationType_DOUBLE, nil 
+  case "STRING": return AnnotationType_STRING, nil 
+  }
+  return AnnotationType(0), fmt.Errorf("not a valid AnnotationType string")
+}
+
+
+func AnnotationTypePtr(v AnnotationType) *AnnotationType { return &v }
+
+func (p AnnotationType) MarshalText() ([]byte, error) {
+return []byte(p.String()), nil
+}
+
+func (p *AnnotationType) UnmarshalText(text []byte) error {
+q, err := AnnotationTypeFromString(string(text))
+if (err != nil) {
+return err
+}
+*p = q
+return nil
+}
+
+func (p *AnnotationType) Scan(value interface{}) error {
+v, ok := value.(int64)
+if !ok {
+return errors.New("Scan value is not int64")
+}
+*p = AnnotationType(v)
+return nil
+}
+
+func (p * AnnotationType) Value() (driver.Value, error) {
+  if p == nil {
+    return nil, nil
+  }
+return int64(*p), nil
+}
+// Indicates the network context of a service recording an annotation with two
+// exceptions.
+// 
+// When a BinaryAnnotation, and key is CLIENT_ADDR or SERVER_ADDR,
+// the endpoint indicates the source or destination of an RPC. This exception
+// allows zipkin to display network context of uninstrumented services, or
+// clients such as web browsers.
+// 
+// Attributes:
+//  - Ipv4: IPv4 host address packed into 4 bytes.
+// 
+// Ex for the ip 1.2.3.4, it would be (1 << 24) | (2 << 16) | (3 << 8) | 4
+//  - Port: IPv4 port
+// 
+// Note: this is to be treated as an unsigned integer, so watch for negatives.
+// 
+// Conventionally, when the port isn't known, port = 0.
+//  - ServiceName: Service name in lowercase, such as "memcache" or "zipkin-web"
+// 
+// Conventionally, when the service name isn't known, service_name = "unknown".
+//  - Ipv6: IPv6 host address packed into 16 bytes. Ex Inet6Address.getBytes()
+type Endpoint struct {
+  Ipv4 int32 `thrift:"ipv4,1" db:"ipv4" json:"ipv4"`
+  Port int16 `thrift:"port,2" db:"port" json:"port"`
+  ServiceName string `thrift:"service_name,3" db:"service_name" json:"service_name"`
+  Ipv6 []byte `thrift:"ipv6,4" db:"ipv6" json:"ipv6,omitempty"`
+}
+
+func NewEndpoint() *Endpoint {
+  return &Endpoint{}
+}
+
+
+func (p *Endpoint) GetIpv4() int32 {
+  return p.Ipv4
+}
+
+func (p *Endpoint) GetPort() int16 {
+  return p.Port
+}
+
+func (p *Endpoint) GetServiceName() string {
+  return p.ServiceName
+}
+var Endpoint_Ipv6_DEFAULT []byte
+
+func (p *Endpoint) GetIpv6() []byte {
+  return p.Ipv6
+}
+func (p *Endpoint) IsSetIpv6() bool {
+  return p.Ipv6 != nil
+}
+
+func (p *Endpoint) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I32 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.I16 {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *Endpoint)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI32(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.Ipv4 = v
+}
+  return nil
+}
+
+func (p *Endpoint)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI16(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  p.Port = v
+}
+  return nil
+}
+
+func (p *Endpoint)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 3: ", err)
+} else {
+  p.ServiceName = v
+}
+  return nil
+}
+
+func (p *Endpoint)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadBinary(ctx); err != nil {
+  return thrift.PrependError("error reading field 4: ", err)
+} else {
+  p.Ipv6 = v
+}
+  return nil
+}
+
+func (p *Endpoint) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Endpoint"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Endpoint) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "ipv4", thrift.I32, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:ipv4: ", p), err) }
+  if err := oprot.WriteI32(ctx, int32(p.Ipv4)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.ipv4 (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:ipv4: ", p), err) }
+  return err
+}
+
+func (p *Endpoint) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "port", thrift.I16, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:port: ", p), err) }
+  if err := oprot.WriteI16(ctx, int16(p.Port)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.port (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:port: ", p), err) }
+  return err
+}
+
+func (p *Endpoint) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "service_name", thrift.STRING, 3); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:service_name: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.ServiceName)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.service_name (3) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 3:service_name: ", p), err) }
+  return err
+}
+
+func (p *Endpoint) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetIpv6() {
+    if err := oprot.WriteFieldBegin(ctx, "ipv6", thrift.STRING, 4); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:ipv6: ", p), err) }
+    if err := oprot.WriteBinary(ctx, p.Ipv6); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.ipv6 (4) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 4:ipv6: ", p), err) }
+  }
+  return err
+}
+
+func (p *Endpoint) Equals(other *Endpoint) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.Ipv4 != other.Ipv4 { return false }
+  if p.Port != other.Port { return false }
+  if p.ServiceName != other.ServiceName { return false }
+  if bytes.Compare(p.Ipv6, other.Ipv6) != 0 { return false }
+  return true
+}
+
+func (p *Endpoint) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Endpoint(%+v)", *p)
+}
+
+// An annotation is similar to a log statement. It includes a host field which
+// allows these events to be attributed properly, and also aggregatable.
+// 
+// Attributes:
+//  - Timestamp: Microseconds from epoch.
+// 
+// This value should use the most precise value possible. For example,
+// gettimeofday or syncing nanoTime against a tick of currentTimeMillis.
+//  - Value
+//  - Host: Always the host that recorded the event. By specifying the host you allow
+// rollup of all events (such as client requests to a service) by IP address.
+type Annotation struct {
+  Timestamp int64 `thrift:"timestamp,1" db:"timestamp" json:"timestamp"`
+  Value string `thrift:"value,2" db:"value" json:"value"`
+  Host *Endpoint `thrift:"host,3" db:"host" json:"host,omitempty"`
+}
+
+func NewAnnotation() *Annotation {
+  return &Annotation{}
+}
+
+
+func (p *Annotation) GetTimestamp() int64 {
+  return p.Timestamp
+}
+
+func (p *Annotation) GetValue() string {
+  return p.Value
+}
+var Annotation_Host_DEFAULT *Endpoint
+func (p *Annotation) GetHost() *Endpoint {
+  if !p.IsSetHost() {
+    return Annotation_Host_DEFAULT
+  }
+return p.Host
+}
+func (p *Annotation) IsSetHost() bool {
+  return p.Host != nil
+}
+
+func (p *Annotation) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *Annotation)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.Timestamp = v
+}
+  return nil
+}
+
+func (p *Annotation)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  p.Value = v
+}
+  return nil
+}
+
+func (p *Annotation)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  p.Host = &Endpoint{}
+  if err := p.Host.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Host), err)
+  }
+  return nil
+}
+
+func (p *Annotation) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Annotation"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Annotation) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "timestamp", thrift.I64, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:timestamp: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.Timestamp)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.timestamp (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:timestamp: ", p), err) }
+  return err
+}
+
+func (p *Annotation) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "value", thrift.STRING, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:value: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.Value)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.value (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:value: ", p), err) }
+  return err
+}
+
+func (p *Annotation) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetHost() {
+    if err := oprot.WriteFieldBegin(ctx, "host", thrift.STRUCT, 3); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:host: ", p), err) }
+    if err := p.Host.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Host), err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 3:host: ", p), err) }
+  }
+  return err
+}
+
+func (p *Annotation) Equals(other *Annotation) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.Timestamp != other.Timestamp { return false }
+  if p.Value != other.Value { return false }
+  if !p.Host.Equals(other.Host) { return false }
+  return true
+}
+
+func (p *Annotation) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Annotation(%+v)", *p)
+}
+
+// Binary annotations are tags applied to a Span to give it context. For
+// example, a binary annotation of "http.uri" could the path to a resource in a
+// RPC call.
+// 
+// Binary annotations of type STRING are always queryable, though more a
+// historical implementation detail than a structural concern.
+// 
+// Binary annotations can repeat, and vary on the host. Similar to Annotation,
+// the host indicates who logged the event. This allows you to tell the
+// difference between the client and server side of the same key. For example,
+// the key "http.uri" might be different on the client and server side due to
+// rewriting, like "/api/v1/myresource" vs "/myresource. Via the host field,
+// you can see the different points of view, which often help in debugging.
+// 
+// Attributes:
+//  - Key
+//  - Value
+//  - AnnotationType
+//  - Host: The host that recorded tag, which allows you to differentiate between
+// multiple tags with the same key. There are two exceptions to this.
+// 
+// When the key is CLIENT_ADDR or SERVER_ADDR, host indicates the source or
+// destination of an RPC. This exception allows zipkin to display network
+// context of uninstrumented services, or clients such as web browsers.
+type BinaryAnnotation struct {
+  Key string `thrift:"key,1" db:"key" json:"key"`
+  Value []byte `thrift:"value,2" db:"value" json:"value"`
+  AnnotationType AnnotationType `thrift:"annotation_type,3" db:"annotation_type" json:"annotation_type"`
+  Host *Endpoint `thrift:"host,4" db:"host" json:"host,omitempty"`
+}
+
+func NewBinaryAnnotation() *BinaryAnnotation {
+  return &BinaryAnnotation{}
+}
+
+
+func (p *BinaryAnnotation) GetKey() string {
+  return p.Key
+}
+
+func (p *BinaryAnnotation) GetValue() []byte {
+  return p.Value
+}
+
+func (p *BinaryAnnotation) GetAnnotationType() AnnotationType {
+  return p.AnnotationType
+}
+var BinaryAnnotation_Host_DEFAULT *Endpoint
+func (p *BinaryAnnotation) GetHost() *Endpoint {
+  if !p.IsSetHost() {
+    return BinaryAnnotation_Host_DEFAULT
+  }
+return p.Host
+}
+func (p *BinaryAnnotation) IsSetHost() bool {
+  return p.Host != nil
+}
+
+func (p *BinaryAnnotation) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 2:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField2(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.I32 {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.STRUCT {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *BinaryAnnotation)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.Key = v
+}
+  return nil
+}
+
+func (p *BinaryAnnotation)  ReadField2(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadBinary(ctx); err != nil {
+  return thrift.PrependError("error reading field 2: ", err)
+} else {
+  p.Value = v
+}
+  return nil
+}
+
+func (p *BinaryAnnotation)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI32(ctx); err != nil {
+  return thrift.PrependError("error reading field 3: ", err)
+} else {
+  temp := AnnotationType(v)
+  p.AnnotationType = temp
+}
+  return nil
+}
+
+func (p *BinaryAnnotation)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  p.Host = &Endpoint{}
+  if err := p.Host.Read(ctx, iprot); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", p.Host), err)
+  }
+  return nil
+}
+
+func (p *BinaryAnnotation) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "BinaryAnnotation"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField2(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *BinaryAnnotation) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "key", thrift.STRING, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:key: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.Key)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.key (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:key: ", p), err) }
+  return err
+}
+
+func (p *BinaryAnnotation) writeField2(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "value", thrift.STRING, 2); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 2:value: ", p), err) }
+  if err := oprot.WriteBinary(ctx, p.Value); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.value (2) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 2:value: ", p), err) }
+  return err
+}
+
+func (p *BinaryAnnotation) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "annotation_type", thrift.I32, 3); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:annotation_type: ", p), err) }
+  if err := oprot.WriteI32(ctx, int32(p.AnnotationType)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.annotation_type (3) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 3:annotation_type: ", p), err) }
+  return err
+}
+
+func (p *BinaryAnnotation) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetHost() {
+    if err := oprot.WriteFieldBegin(ctx, "host", thrift.STRUCT, 4); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:host: ", p), err) }
+    if err := p.Host.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", p.Host), err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 4:host: ", p), err) }
+  }
+  return err
+}
+
+func (p *BinaryAnnotation) Equals(other *BinaryAnnotation) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.Key != other.Key { return false }
+  if bytes.Compare(p.Value, other.Value) != 0 { return false }
+  if p.AnnotationType != other.AnnotationType { return false }
+  if !p.Host.Equals(other.Host) { return false }
+  return true
+}
+
+func (p *BinaryAnnotation) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("BinaryAnnotation(%+v)", *p)
+}
+
+// A trace is a series of spans (often RPC calls) which form a latency tree.
+// 
+// The root span is where trace_id = id and parent_id = Nil. The root span is
+// usually the longest interval in the trace, starting with a SERVER_RECV
+// annotation and ending with a SERVER_SEND.
+// 
+// Attributes:
+//  - TraceID
+//  - Name: Span name in lowercase, rpc method for example
+// 
+// Conventionally, when the span name isn't known, name = "unknown".
+//  - ID
+//  - ParentID
+//  - Annotations
+//  - BinaryAnnotations
+//  - Debug
+//  - Timestamp: Microseconds from epoch of the creation of this span.
+// 
+// This value should be set directly by instrumentation, using the most
+// precise value possible. For example, gettimeofday or syncing nanoTime
+// against a tick of currentTimeMillis.
+// 
+// For compatibility with instrumentation that precede this field, collectors
+// or span stores can derive this via Annotation.timestamp.
+// For example, SERVER_RECV.timestamp or CLIENT_SEND.timestamp.
+// 
+// This field is optional for compatibility with old data: first-party span
+// stores are expected to support this at time of introduction.
+//  - Duration: Measurement of duration in microseconds, used to support queries.
+// 
+// This value should be set directly, where possible. Doing so encourages
+// precise measurement decoupled from problems of clocks, such as skew or NTP
+// updates causing time to move backwards.
+// 
+// For compatibility with instrumentation that precede this field, collectors
+// or span stores can derive this by subtracting Annotation.timestamp.
+// For example, SERVER_SEND.timestamp - SERVER_RECV.timestamp.
+// 
+// If this field is persisted as unset, zipkin will continue to work, except
+// duration query support will be implementation-specific. Similarly, setting
+// this field non-atomically is implementation-specific.
+// 
+// This field is i64 vs i32 to support spans longer than 35 minutes.
+//  - TraceIDHigh: Optional unique 8-byte additional identifier for a trace. If non zero, this
+// means the trace uses 128 bit traceIds instead of 64 bit.
+type Span struct {
+  TraceID int64 `thrift:"trace_id,1" db:"trace_id" json:"trace_id"`
+  // unused field # 2
+  Name string `thrift:"name,3" db:"name" json:"name"`
+  ID int64 `thrift:"id,4" db:"id" json:"id"`
+  ParentID *int64 `thrift:"parent_id,5" db:"parent_id" json:"parent_id,omitempty"`
+  Annotations []*Annotation `thrift:"annotations,6" db:"annotations" json:"annotations"`
+  // unused field # 7
+  BinaryAnnotations []*BinaryAnnotation `thrift:"binary_annotations,8" db:"binary_annotations" json:"binary_annotations"`
+  Debug bool `thrift:"debug,9" db:"debug" json:"debug"`
+  Timestamp *int64 `thrift:"timestamp,10" db:"timestamp" json:"timestamp,omitempty"`
+  Duration *int64 `thrift:"duration,11" db:"duration" json:"duration,omitempty"`
+  TraceIDHigh *int64 `thrift:"trace_id_high,12" db:"trace_id_high" json:"trace_id_high,omitempty"`
+}
+
+func NewSpan() *Span {
+  return &Span{}
+}
+
+
+func (p *Span) GetTraceID() int64 {
+  return p.TraceID
+}
+
+func (p *Span) GetName() string {
+  return p.Name
+}
+
+func (p *Span) GetID() int64 {
+  return p.ID
+}
+var Span_ParentID_DEFAULT int64
+func (p *Span) GetParentID() int64 {
+  if !p.IsSetParentID() {
+    return Span_ParentID_DEFAULT
+  }
+return *p.ParentID
+}
+
+func (p *Span) GetAnnotations() []*Annotation {
+  return p.Annotations
+}
+
+func (p *Span) GetBinaryAnnotations() []*BinaryAnnotation {
+  return p.BinaryAnnotations
+}
+var Span_Debug_DEFAULT bool = false
+
+func (p *Span) GetDebug() bool {
+  return p.Debug
+}
+var Span_Timestamp_DEFAULT int64
+func (p *Span) GetTimestamp() int64 {
+  if !p.IsSetTimestamp() {
+    return Span_Timestamp_DEFAULT
+  }
+return *p.Timestamp
+}
+var Span_Duration_DEFAULT int64
+func (p *Span) GetDuration() int64 {
+  if !p.IsSetDuration() {
+    return Span_Duration_DEFAULT
+  }
+return *p.Duration
+}
+var Span_TraceIDHigh_DEFAULT int64
+func (p *Span) GetTraceIDHigh() int64 {
+  if !p.IsSetTraceIDHigh() {
+    return Span_TraceIDHigh_DEFAULT
+  }
+return *p.TraceIDHigh
+}
+func (p *Span) IsSetParentID() bool {
+  return p.ParentID != nil
+}
+
+func (p *Span) IsSetDebug() bool {
+  return p.Debug != Span_Debug_DEFAULT
+}
+
+func (p *Span) IsSetTimestamp() bool {
+  return p.Timestamp != nil
+}
+
+func (p *Span) IsSetDuration() bool {
+  return p.Duration != nil
+}
+
+func (p *Span) IsSetTraceIDHigh() bool {
+  return p.TraceIDHigh != nil
+}
+
+func (p *Span) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 3:
+      if fieldTypeId == thrift.STRING {
+        if err := p.ReadField3(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 4:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField4(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 5:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField5(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 6:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField6(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 8:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField8(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 9:
+      if fieldTypeId == thrift.BOOL {
+        if err := p.ReadField9(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 10:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField10(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 11:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField11(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    case 12:
+      if fieldTypeId == thrift.I64 {
+        if err := p.ReadField12(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *Span)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.TraceID = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField3(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadString(ctx); err != nil {
+  return thrift.PrependError("error reading field 3: ", err)
+} else {
+  p.Name = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField4(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 4: ", err)
+} else {
+  p.ID = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField5(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 5: ", err)
+} else {
+  p.ParentID = &v
+}
+  return nil
+}
+
+func (p *Span)  ReadField6(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Annotation, 0, size)
+  p.Annotations =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem0 := &Annotation{}
+    if err := _elem0.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem0), err)
+    }
+    p.Annotations = append(p.Annotations, _elem0)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *Span)  ReadField8(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*BinaryAnnotation, 0, size)
+  p.BinaryAnnotations =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem1 := &BinaryAnnotation{}
+    if err := _elem1.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem1), err)
+    }
+    p.BinaryAnnotations = append(p.BinaryAnnotations, _elem1)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *Span)  ReadField9(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadBool(ctx); err != nil {
+  return thrift.PrependError("error reading field 9: ", err)
+} else {
+  p.Debug = v
+}
+  return nil
+}
+
+func (p *Span)  ReadField10(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 10: ", err)
+} else {
+  p.Timestamp = &v
+}
+  return nil
+}
+
+func (p *Span)  ReadField11(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 11: ", err)
+} else {
+  p.Duration = &v
+}
+  return nil
+}
+
+func (p *Span)  ReadField12(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadI64(ctx); err != nil {
+  return thrift.PrependError("error reading field 12: ", err)
+} else {
+  p.TraceIDHigh = &v
+}
+  return nil
+}
+
+func (p *Span) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Span"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+    if err := p.writeField3(ctx, oprot); err != nil { return err }
+    if err := p.writeField4(ctx, oprot); err != nil { return err }
+    if err := p.writeField5(ctx, oprot); err != nil { return err }
+    if err := p.writeField6(ctx, oprot); err != nil { return err }
+    if err := p.writeField8(ctx, oprot); err != nil { return err }
+    if err := p.writeField9(ctx, oprot); err != nil { return err }
+    if err := p.writeField10(ctx, oprot); err != nil { return err }
+    if err := p.writeField11(ctx, oprot); err != nil { return err }
+    if err := p.writeField12(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Span) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "trace_id", thrift.I64, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:trace_id: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.TraceID)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.trace_id (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:trace_id: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField3(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "name", thrift.STRING, 3); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 3:name: ", p), err) }
+  if err := oprot.WriteString(ctx, string(p.Name)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.name (3) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 3:name: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField4(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "id", thrift.I64, 4); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 4:id: ", p), err) }
+  if err := oprot.WriteI64(ctx, int64(p.ID)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.id (4) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 4:id: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField5(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetParentID() {
+    if err := oprot.WriteFieldBegin(ctx, "parent_id", thrift.I64, 5); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 5:parent_id: ", p), err) }
+    if err := oprot.WriteI64(ctx, int64(*p.ParentID)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.parent_id (5) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 5:parent_id: ", p), err) }
+  }
+  return err
+}
+
+func (p *Span) writeField6(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "annotations", thrift.LIST, 6); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 6:annotations: ", p), err) }
+  if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Annotations)); err != nil {
+    return thrift.PrependError("error writing list begin: ", err)
+  }
+  for _, v := range p.Annotations {
+    if err := v.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+    }
+  }
+  if err := oprot.WriteListEnd(ctx); err != nil {
+    return thrift.PrependError("error writing list end: ", err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 6:annotations: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField8(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "binary_annotations", thrift.LIST, 8); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 8:binary_annotations: ", p), err) }
+  if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.BinaryAnnotations)); err != nil {
+    return thrift.PrependError("error writing list begin: ", err)
+  }
+  for _, v := range p.BinaryAnnotations {
+    if err := v.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+    }
+  }
+  if err := oprot.WriteListEnd(ctx); err != nil {
+    return thrift.PrependError("error writing list end: ", err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 8:binary_annotations: ", p), err) }
+  return err
+}
+
+func (p *Span) writeField9(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetDebug() {
+    if err := oprot.WriteFieldBegin(ctx, "debug", thrift.BOOL, 9); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 9:debug: ", p), err) }
+    if err := oprot.WriteBool(ctx, bool(p.Debug)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.debug (9) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 9:debug: ", p), err) }
+  }
+  return err
+}
+
+func (p *Span) writeField10(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetTimestamp() {
+    if err := oprot.WriteFieldBegin(ctx, "timestamp", thrift.I64, 10); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 10:timestamp: ", p), err) }
+    if err := oprot.WriteI64(ctx, int64(*p.Timestamp)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.timestamp (10) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 10:timestamp: ", p), err) }
+  }
+  return err
+}
+
+func (p *Span) writeField11(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetDuration() {
+    if err := oprot.WriteFieldBegin(ctx, "duration", thrift.I64, 11); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 11:duration: ", p), err) }
+    if err := oprot.WriteI64(ctx, int64(*p.Duration)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.duration (11) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 11:duration: ", p), err) }
+  }
+  return err
+}
+
+func (p *Span) writeField12(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetTraceIDHigh() {
+    if err := oprot.WriteFieldBegin(ctx, "trace_id_high", thrift.I64, 12); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 12:trace_id_high: ", p), err) }
+    if err := oprot.WriteI64(ctx, int64(*p.TraceIDHigh)); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T.trace_id_high (12) field write error: ", p), err) }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 12:trace_id_high: ", p), err) }
+  }
+  return err
+}
+
+func (p *Span) Equals(other *Span) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.TraceID != other.TraceID { return false }
+  if p.Name != other.Name { return false }
+  if p.ID != other.ID { return false }
+  if p.ParentID != other.ParentID {
+    if p.ParentID == nil || other.ParentID == nil {
+      return false
+    }
+    if (*p.ParentID) != (*other.ParentID) { return false }
+  }
+  if len(p.Annotations) != len(other.Annotations) { return false }
+  for i, _tgt := range p.Annotations {
+    _src2 := other.Annotations[i]
+    if !_tgt.Equals(_src2) { return false }
+  }
+  if len(p.BinaryAnnotations) != len(other.BinaryAnnotations) { return false }
+  for i, _tgt := range p.BinaryAnnotations {
+    _src3 := other.BinaryAnnotations[i]
+    if !_tgt.Equals(_src3) { return false }
+  }
+  if p.Debug != other.Debug { return false }
+  if p.Timestamp != other.Timestamp {
+    if p.Timestamp == nil || other.Timestamp == nil {
+      return false
+    }
+    if (*p.Timestamp) != (*other.Timestamp) { return false }
+  }
+  if p.Duration != other.Duration {
+    if p.Duration == nil || other.Duration == nil {
+      return false
+    }
+    if (*p.Duration) != (*other.Duration) { return false }
+  }
+  if p.TraceIDHigh != other.TraceIDHigh {
+    if p.TraceIDHigh == nil || other.TraceIDHigh == nil {
+      return false
+    }
+    if (*p.TraceIDHigh) != (*other.TraceIDHigh) { return false }
+  }
+  return true
+}
+
+func (p *Span) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Span(%+v)", *p)
+}
+
+// Attributes:
+//  - Ok
+type Response struct {
+  Ok bool `thrift:"ok,1,required" db:"ok" json:"ok"`
+}
+
+func NewResponse() *Response {
+  return &Response{}
+}
+
+
+func (p *Response) GetOk() bool {
+  return p.Ok
+}
+func (p *Response) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+  var issetOk bool = false;
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.BOOL {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+        issetOk = true
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  if !issetOk{
+    return thrift.NewTProtocolExceptionWithType(thrift.INVALID_DATA, fmt.Errorf("Required field Ok is not set"));
+  }
+  return nil
+}
+
+func (p *Response)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  if v, err := iprot.ReadBool(ctx); err != nil {
+  return thrift.PrependError("error reading field 1: ", err)
+} else {
+  p.Ok = v
+}
+  return nil
+}
+
+func (p *Response) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "Response"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *Response) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "ok", thrift.BOOL, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:ok: ", p), err) }
+  if err := oprot.WriteBool(ctx, bool(p.Ok)); err != nil {
+  return thrift.PrependError(fmt.Sprintf("%T.ok (1) field write error: ", p), err) }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:ok: ", p), err) }
+  return err
+}
+
+func (p *Response) Equals(other *Response) bool {
+  if p == other {
+    return true
+  } else if p == nil || other == nil {
+    return false
+  }
+  if p.Ok != other.Ok { return false }
+  return true
+}
+
+func (p *Response) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("Response(%+v)", *p)
+}
+
+type ZipkinCollector interface {
+  // Parameters:
+  //  - Spans
+  SubmitZipkinBatch(ctx context.Context, spans []*Span) (_r []*Response, _err error)
+}
+
+type ZipkinCollectorClient struct {
+  c thrift.TClient
+  meta thrift.ResponseMeta
+}
+
+func NewZipkinCollectorClientFactory(t thrift.TTransport, f thrift.TProtocolFactory) *ZipkinCollectorClient {
+  return &ZipkinCollectorClient{
+    c: thrift.NewTStandardClient(f.GetProtocol(t), f.GetProtocol(t)),
+  }
+}
+
+func NewZipkinCollectorClientProtocol(t thrift.TTransport, iprot thrift.TProtocol, oprot thrift.TProtocol) *ZipkinCollectorClient {
+  return &ZipkinCollectorClient{
+    c: thrift.NewTStandardClient(iprot, oprot),
+  }
+}
+
+func NewZipkinCollectorClient(c thrift.TClient) *ZipkinCollectorClient {
+  return &ZipkinCollectorClient{
+    c: c,
+  }
+}
+
+func (p *ZipkinCollectorClient) Client_() thrift.TClient {
+  return p.c
+}
+
+func (p *ZipkinCollectorClient) LastResponseMeta_() thrift.ResponseMeta {
+  return p.meta
+}
+
+func (p *ZipkinCollectorClient) SetLastResponseMeta_(meta thrift.ResponseMeta) {
+  p.meta = meta
+}
+
+// Parameters:
+//  - Spans
+func (p *ZipkinCollectorClient) SubmitZipkinBatch(ctx context.Context, spans []*Span) (_r []*Response, _err error) {
+  var _args4 ZipkinCollectorSubmitZipkinBatchArgs
+  _args4.Spans = spans
+  var _result6 ZipkinCollectorSubmitZipkinBatchResult
+  var _meta5 thrift.ResponseMeta
+  _meta5, _err = p.Client_().Call(ctx, "submitZipkinBatch", &_args4, &_result6)
+  p.SetLastResponseMeta_(_meta5)
+  if _err != nil {
+    return
+  }
+  return _result6.GetSuccess(), nil
+}
+
+type ZipkinCollectorProcessor struct {
+  processorMap map[string]thrift.TProcessorFunction
+  handler ZipkinCollector
+}
+
+func (p *ZipkinCollectorProcessor) AddToProcessorMap(key string, processor thrift.TProcessorFunction) {
+  p.processorMap[key] = processor
+}
+
+func (p *ZipkinCollectorProcessor) GetProcessorFunction(key string) (processor thrift.TProcessorFunction, ok bool) {
+  processor, ok = p.processorMap[key]
+  return processor, ok
+}
+
+func (p *ZipkinCollectorProcessor) ProcessorMap() map[string]thrift.TProcessorFunction {
+  return p.processorMap
+}
+
+func NewZipkinCollectorProcessor(handler ZipkinCollector) *ZipkinCollectorProcessor {
+
+  self7 := &ZipkinCollectorProcessor{handler:handler, processorMap:make(map[string]thrift.TProcessorFunction)}
+  self7.processorMap["submitZipkinBatch"] = &zipkinCollectorProcessorSubmitZipkinBatch{handler:handler}
+return self7
+}
+
+func (p *ZipkinCollectorProcessor) Process(ctx context.Context, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  name, _, seqId, err2 := iprot.ReadMessageBegin(ctx)
+  if err2 != nil { return false, thrift.WrapTException(err2) }
+  if processor, ok := p.GetProcessorFunction(name); ok {
+    return processor.Process(ctx, seqId, iprot, oprot)
+  }
+  iprot.Skip(ctx, thrift.STRUCT)
+  iprot.ReadMessageEnd(ctx)
+  x8 := thrift.NewTApplicationException(thrift.UNKNOWN_METHOD, "Unknown function " + name)
+  oprot.WriteMessageBegin(ctx, name, thrift.EXCEPTION, seqId)
+  x8.Write(ctx, oprot)
+  oprot.WriteMessageEnd(ctx)
+  oprot.Flush(ctx)
+  return false, x8
+
+}
+
+type zipkinCollectorProcessorSubmitZipkinBatch struct {
+  handler ZipkinCollector
+}
+
+func (p *zipkinCollectorProcessorSubmitZipkinBatch) Process(ctx context.Context, seqId int32, iprot, oprot thrift.TProtocol) (success bool, err thrift.TException) {
+  args := ZipkinCollectorSubmitZipkinBatchArgs{}
+  var err2 error
+  if err2 = args.Read(ctx, iprot); err2 != nil {
+    iprot.ReadMessageEnd(ctx)
+    x := thrift.NewTApplicationException(thrift.PROTOCOL_ERROR, err2.Error())
+    oprot.WriteMessageBegin(ctx, "submitZipkinBatch", thrift.EXCEPTION, seqId)
+    x.Write(ctx, oprot)
+    oprot.WriteMessageEnd(ctx)
+    oprot.Flush(ctx)
+    return false, thrift.WrapTException(err2)
+  }
+  iprot.ReadMessageEnd(ctx)
+
+  tickerCancel := func() {}
+  // Start a goroutine to do server side connectivity check.
+  if thrift.ServerConnectivityCheckInterval > 0 {
+    var cancel context.CancelFunc
+    ctx, cancel = context.WithCancel(ctx)
+    defer cancel()
+    var tickerCtx context.Context
+    tickerCtx, tickerCancel = context.WithCancel(context.Background())
+    defer tickerCancel()
+    go func(ctx context.Context, cancel context.CancelFunc) {
+      ticker := time.NewTicker(thrift.ServerConnectivityCheckInterval)
+      defer ticker.Stop()
+      for {
+        select {
+        case <-ctx.Done():
+          return
+        case <-ticker.C:
+          if !iprot.Transport().IsOpen() {
+            cancel()
+            return
+          }
+        }
+      }
+    }(tickerCtx, cancel)
+  }
+
+  result := ZipkinCollectorSubmitZipkinBatchResult{}
+  var retval []*Response
+  if retval, err2 = p.handler.SubmitZipkinBatch(ctx, args.Spans); err2 != nil {
+    tickerCancel()
+    if err2 == thrift.ErrAbandonRequest {
+      return false, thrift.WrapTException(err2)
+    }
+    x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing submitZipkinBatch: " + err2.Error())
+    oprot.WriteMessageBegin(ctx, "submitZipkinBatch", thrift.EXCEPTION, seqId)
+    x.Write(ctx, oprot)
+    oprot.WriteMessageEnd(ctx)
+    oprot.Flush(ctx)
+    return true, thrift.WrapTException(err2)
+  } else {
+    result.Success = retval
+  }
+  tickerCancel()
+  if err2 = oprot.WriteMessageBegin(ctx, "submitZipkinBatch", thrift.REPLY, seqId); err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = result.Write(ctx, oprot); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = oprot.WriteMessageEnd(ctx); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err2 = oprot.Flush(ctx); err == nil && err2 != nil {
+    err = thrift.WrapTException(err2)
+  }
+  if err != nil {
+    return
+  }
+  return true, err
+}
+
+
+// HELPER FUNCTIONS AND STRUCTURES
+
+// Attributes:
+//  - Spans
+type ZipkinCollectorSubmitZipkinBatchArgs struct {
+  Spans []*Span `thrift:"spans,1" db:"spans" json:"spans"`
+}
+
+func NewZipkinCollectorSubmitZipkinBatchArgs() *ZipkinCollectorSubmitZipkinBatchArgs {
+  return &ZipkinCollectorSubmitZipkinBatchArgs{}
+}
+
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) GetSpans() []*Span {
+  return p.Spans
+}
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 1:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField1(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs)  ReadField1(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Span, 0, size)
+  p.Spans =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem9 := &Span{}
+    if err := _elem9.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem9), err)
+    }
+    p.Spans = append(p.Spans, _elem9)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "submitZipkinBatch_args"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField1(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) writeField1(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if err := oprot.WriteFieldBegin(ctx, "spans", thrift.LIST, 1); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:spans: ", p), err) }
+  if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Spans)); err != nil {
+    return thrift.PrependError("error writing list begin: ", err)
+  }
+  for _, v := range p.Spans {
+    if err := v.Write(ctx, oprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+    }
+  }
+  if err := oprot.WriteListEnd(ctx); err != nil {
+    return thrift.PrependError("error writing list end: ", err)
+  }
+  if err := oprot.WriteFieldEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write field end error 1:spans: ", p), err) }
+  return err
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchArgs) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("ZipkinCollectorSubmitZipkinBatchArgs(%+v)", *p)
+}
+
+// Attributes:
+//  - Success
+type ZipkinCollectorSubmitZipkinBatchResult struct {
+  Success []*Response `thrift:"success,0" db:"success" json:"success,omitempty"`
+}
+
+func NewZipkinCollectorSubmitZipkinBatchResult() *ZipkinCollectorSubmitZipkinBatchResult {
+  return &ZipkinCollectorSubmitZipkinBatchResult{}
+}
+
+var ZipkinCollectorSubmitZipkinBatchResult_Success_DEFAULT []*Response
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) GetSuccess() []*Response {
+  return p.Success
+}
+func (p *ZipkinCollectorSubmitZipkinBatchResult) IsSetSuccess() bool {
+  return p.Success != nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) Read(ctx context.Context, iprot thrift.TProtocol) error {
+  if _, err := iprot.ReadStructBegin(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read error: ", p), err)
+  }
+
+
+  for {
+    _, fieldTypeId, fieldId, err := iprot.ReadFieldBegin(ctx)
+    if err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T field %d read error: ", p, fieldId), err)
+    }
+    if fieldTypeId == thrift.STOP { break; }
+    switch fieldId {
+    case 0:
+      if fieldTypeId == thrift.LIST {
+        if err := p.ReadField0(ctx, iprot); err != nil {
+          return err
+        }
+      } else {
+        if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+          return err
+        }
+      }
+    default:
+      if err := iprot.Skip(ctx, fieldTypeId); err != nil {
+        return err
+      }
+    }
+    if err := iprot.ReadFieldEnd(ctx); err != nil {
+      return err
+    }
+  }
+  if err := iprot.ReadStructEnd(ctx); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T read struct end error: ", p), err)
+  }
+  return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult)  ReadField0(ctx context.Context, iprot thrift.TProtocol) error {
+  _, size, err := iprot.ReadListBegin(ctx)
+  if err != nil {
+    return thrift.PrependError("error reading list begin: ", err)
+  }
+  tSlice := make([]*Response, 0, size)
+  p.Success =  tSlice
+  for i := 0; i < size; i ++ {
+    _elem10 := &Response{}
+    if err := _elem10.Read(ctx, iprot); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T error reading struct: ", _elem10), err)
+    }
+    p.Success = append(p.Success, _elem10)
+  }
+  if err := iprot.ReadListEnd(ctx); err != nil {
+    return thrift.PrependError("error reading list end: ", err)
+  }
+  return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) Write(ctx context.Context, oprot thrift.TProtocol) error {
+  if err := oprot.WriteStructBegin(ctx, "submitZipkinBatch_result"); err != nil {
+    return thrift.PrependError(fmt.Sprintf("%T write struct begin error: ", p), err) }
+  if p != nil {
+    if err := p.writeField0(ctx, oprot); err != nil { return err }
+  }
+  if err := oprot.WriteFieldStop(ctx); err != nil {
+    return thrift.PrependError("write field stop error: ", err) }
+  if err := oprot.WriteStructEnd(ctx); err != nil {
+    return thrift.PrependError("write struct stop error: ", err) }
+  return nil
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) writeField0(ctx context.Context, oprot thrift.TProtocol) (err error) {
+  if p.IsSetSuccess() {
+    if err := oprot.WriteFieldBegin(ctx, "success", thrift.LIST, 0); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field begin error 0:success: ", p), err) }
+    if err := oprot.WriteListBegin(ctx, thrift.STRUCT, len(p.Success)); err != nil {
+      return thrift.PrependError("error writing list begin: ", err)
+    }
+    for _, v := range p.Success {
+      if err := v.Write(ctx, oprot); err != nil {
+        return thrift.PrependError(fmt.Sprintf("%T error writing struct: ", v), err)
+      }
+    }
+    if err := oprot.WriteListEnd(ctx); err != nil {
+      return thrift.PrependError("error writing list end: ", err)
+    }
+    if err := oprot.WriteFieldEnd(ctx); err != nil {
+      return thrift.PrependError(fmt.Sprintf("%T write field end error 0:success: ", p), err) }
+  }
+  return err
+}
+
+func (p *ZipkinCollectorSubmitZipkinBatchResult) String() string {
+  if p == nil {
+    return "<nil>"
+  }
+  return fmt.Sprintf("ZipkinCollectorSubmitZipkinBatchResult(%+v)", *p)
+}
+
+
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/.nocover b/vendor/github.com/uber/jaeger-client-go/thrift/.nocover
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/.nocover
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/README.md b/vendor/github.com/uber/jaeger-client-go/thrift/README.md
new file mode 100644
index 0000000..c4c38ae
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/README.md
@@ -0,0 +1,11 @@
+# Apache Thrift
+
+This is a partial copy of Apache Thrift v0.14.1 (https://github.com/apache/thrift/commit/f6fa1794539e68ac294038ac388d6bde40a6c237).
+
+It is vendored code to avoid compatibility issues with Thrift versions.
+
+The file logger.go is modified to remove dependency on "testing" (see Issue #585).
+
+See:
+  * https://github.com/jaegertracing/jaeger-client-go/pull/584
+  * https://github.com/jaegertracing/jaeger-client-go/pull/303
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/application_exception.go b/vendor/github.com/uber/jaeger-client-go/thrift/application_exception.go
new file mode 100644
index 0000000..32d5b01
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/application_exception.go
@@ -0,0 +1,180 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+)
+
+const (
+	UNKNOWN_APPLICATION_EXCEPTION  = 0
+	UNKNOWN_METHOD                 = 1
+	INVALID_MESSAGE_TYPE_EXCEPTION = 2
+	WRONG_METHOD_NAME              = 3
+	BAD_SEQUENCE_ID                = 4
+	MISSING_RESULT                 = 5
+	INTERNAL_ERROR                 = 6
+	PROTOCOL_ERROR                 = 7
+	INVALID_TRANSFORM              = 8
+	INVALID_PROTOCOL               = 9
+	UNSUPPORTED_CLIENT_TYPE        = 10
+)
+
+var defaultApplicationExceptionMessage = map[int32]string{
+	UNKNOWN_APPLICATION_EXCEPTION:  "unknown application exception",
+	UNKNOWN_METHOD:                 "unknown method",
+	INVALID_MESSAGE_TYPE_EXCEPTION: "invalid message type",
+	WRONG_METHOD_NAME:              "wrong method name",
+	BAD_SEQUENCE_ID:                "bad sequence ID",
+	MISSING_RESULT:                 "missing result",
+	INTERNAL_ERROR:                 "unknown internal error",
+	PROTOCOL_ERROR:                 "unknown protocol error",
+	INVALID_TRANSFORM:              "Invalid transform",
+	INVALID_PROTOCOL:               "Invalid protocol",
+	UNSUPPORTED_CLIENT_TYPE:        "Unsupported client type",
+}
+
+// Application level Thrift exception
+type TApplicationException interface {
+	TException
+	TypeId() int32
+	Read(ctx context.Context, iprot TProtocol) error
+	Write(ctx context.Context, oprot TProtocol) error
+}
+
+type tApplicationException struct {
+	message string
+	type_   int32
+}
+
+var _ TApplicationException = (*tApplicationException)(nil)
+
+func (tApplicationException) TExceptionType() TExceptionType {
+	return TExceptionTypeApplication
+}
+
+func (e tApplicationException) Error() string {
+	if e.message != "" {
+		return e.message
+	}
+	return defaultApplicationExceptionMessage[e.type_]
+}
+
+func NewTApplicationException(type_ int32, message string) TApplicationException {
+	return &tApplicationException{message, type_}
+}
+
+func (p *tApplicationException) TypeId() int32 {
+	return p.type_
+}
+
+func (p *tApplicationException) Read(ctx context.Context, iprot TProtocol) error {
+	// TODO: this should really be generated by the compiler
+	_, err := iprot.ReadStructBegin(ctx)
+	if err != nil {
+		return err
+	}
+
+	message := ""
+	type_ := int32(UNKNOWN_APPLICATION_EXCEPTION)
+
+	for {
+		_, ttype, id, err := iprot.ReadFieldBegin(ctx)
+		if err != nil {
+			return err
+		}
+		if ttype == STOP {
+			break
+		}
+		switch id {
+		case 1:
+			if ttype == STRING {
+				if message, err = iprot.ReadString(ctx); err != nil {
+					return err
+				}
+			} else {
+				if err = SkipDefaultDepth(ctx, iprot, ttype); err != nil {
+					return err
+				}
+			}
+		case 2:
+			if ttype == I32 {
+				if type_, err = iprot.ReadI32(ctx); err != nil {
+					return err
+				}
+			} else {
+				if err = SkipDefaultDepth(ctx, iprot, ttype); err != nil {
+					return err
+				}
+			}
+		default:
+			if err = SkipDefaultDepth(ctx, iprot, ttype); err != nil {
+				return err
+			}
+		}
+		if err = iprot.ReadFieldEnd(ctx); err != nil {
+			return err
+		}
+	}
+	if err := iprot.ReadStructEnd(ctx); err != nil {
+		return err
+	}
+
+	p.message = message
+	p.type_ = type_
+
+	return nil
+}
+
+func (p *tApplicationException) Write(ctx context.Context, oprot TProtocol) (err error) {
+	err = oprot.WriteStructBegin(ctx, "TApplicationException")
+	if len(p.Error()) > 0 {
+		err = oprot.WriteFieldBegin(ctx, "message", STRING, 1)
+		if err != nil {
+			return
+		}
+		err = oprot.WriteString(ctx, p.Error())
+		if err != nil {
+			return
+		}
+		err = oprot.WriteFieldEnd(ctx)
+		if err != nil {
+			return
+		}
+	}
+	err = oprot.WriteFieldBegin(ctx, "type", I32, 2)
+	if err != nil {
+		return
+	}
+	err = oprot.WriteI32(ctx, p.type_)
+	if err != nil {
+		return
+	}
+	err = oprot.WriteFieldEnd(ctx)
+	if err != nil {
+		return
+	}
+	err = oprot.WriteFieldStop(ctx)
+	if err != nil {
+		return
+	}
+	err = oprot.WriteStructEnd(ctx)
+	return
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/binary_protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/binary_protocol.go
new file mode 100644
index 0000000..45c880d
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/binary_protocol.go
@@ -0,0 +1,555 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bytes"
+	"context"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+)
+
+type TBinaryProtocol struct {
+	trans         TRichTransport
+	origTransport TTransport
+	cfg           *TConfiguration
+	buffer        [64]byte
+}
+
+type TBinaryProtocolFactory struct {
+	cfg *TConfiguration
+}
+
+// Deprecated: Use NewTBinaryProtocolConf instead.
+func NewTBinaryProtocolTransport(t TTransport) *TBinaryProtocol {
+	return NewTBinaryProtocolConf(t, &TConfiguration{
+		noPropagation: true,
+	})
+}
+
+// Deprecated: Use NewTBinaryProtocolConf instead.
+func NewTBinaryProtocol(t TTransport, strictRead, strictWrite bool) *TBinaryProtocol {
+	return NewTBinaryProtocolConf(t, &TConfiguration{
+		TBinaryStrictRead:  &strictRead,
+		TBinaryStrictWrite: &strictWrite,
+
+		noPropagation: true,
+	})
+}
+
+func NewTBinaryProtocolConf(t TTransport, conf *TConfiguration) *TBinaryProtocol {
+	PropagateTConfiguration(t, conf)
+	p := &TBinaryProtocol{
+		origTransport: t,
+		cfg:           conf,
+	}
+	if et, ok := t.(TRichTransport); ok {
+		p.trans = et
+	} else {
+		p.trans = NewTRichTransport(t)
+	}
+	return p
+}
+
+// Deprecated: Use NewTBinaryProtocolFactoryConf instead.
+func NewTBinaryProtocolFactoryDefault() *TBinaryProtocolFactory {
+	return NewTBinaryProtocolFactoryConf(&TConfiguration{
+		noPropagation: true,
+	})
+}
+
+// Deprecated: Use NewTBinaryProtocolFactoryConf instead.
+func NewTBinaryProtocolFactory(strictRead, strictWrite bool) *TBinaryProtocolFactory {
+	return NewTBinaryProtocolFactoryConf(&TConfiguration{
+		TBinaryStrictRead:  &strictRead,
+		TBinaryStrictWrite: &strictWrite,
+
+		noPropagation: true,
+	})
+}
+
+func NewTBinaryProtocolFactoryConf(conf *TConfiguration) *TBinaryProtocolFactory {
+	return &TBinaryProtocolFactory{
+		cfg: conf,
+	}
+}
+
+func (p *TBinaryProtocolFactory) GetProtocol(t TTransport) TProtocol {
+	return NewTBinaryProtocolConf(t, p.cfg)
+}
+
+func (p *TBinaryProtocolFactory) SetTConfiguration(conf *TConfiguration) {
+	p.cfg = conf
+}
+
+/**
+ * Writing Methods
+ */
+
+func (p *TBinaryProtocol) WriteMessageBegin(ctx context.Context, name string, typeId TMessageType, seqId int32) error {
+	if p.cfg.GetTBinaryStrictWrite() {
+		version := uint32(VERSION_1) | uint32(typeId)
+		e := p.WriteI32(ctx, int32(version))
+		if e != nil {
+			return e
+		}
+		e = p.WriteString(ctx, name)
+		if e != nil {
+			return e
+		}
+		e = p.WriteI32(ctx, seqId)
+		return e
+	} else {
+		e := p.WriteString(ctx, name)
+		if e != nil {
+			return e
+		}
+		e = p.WriteByte(ctx, int8(typeId))
+		if e != nil {
+			return e
+		}
+		e = p.WriteI32(ctx, seqId)
+		return e
+	}
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteMessageEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteStructBegin(ctx context.Context, name string) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteStructEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteFieldBegin(ctx context.Context, name string, typeId TType, id int16) error {
+	e := p.WriteByte(ctx, int8(typeId))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI16(ctx, id)
+	return e
+}
+
+func (p *TBinaryProtocol) WriteFieldEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteFieldStop(ctx context.Context) error {
+	e := p.WriteByte(ctx, STOP)
+	return e
+}
+
+func (p *TBinaryProtocol) WriteMapBegin(ctx context.Context, keyType TType, valueType TType, size int) error {
+	e := p.WriteByte(ctx, int8(keyType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteByte(ctx, int8(valueType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(ctx, int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteMapEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteListBegin(ctx context.Context, elemType TType, size int) error {
+	e := p.WriteByte(ctx, int8(elemType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(ctx, int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteListEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteSetBegin(ctx context.Context, elemType TType, size int) error {
+	e := p.WriteByte(ctx, int8(elemType))
+	if e != nil {
+		return e
+	}
+	e = p.WriteI32(ctx, int32(size))
+	return e
+}
+
+func (p *TBinaryProtocol) WriteSetEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) WriteBool(ctx context.Context, value bool) error {
+	if value {
+		return p.WriteByte(ctx, 1)
+	}
+	return p.WriteByte(ctx, 0)
+}
+
+func (p *TBinaryProtocol) WriteByte(ctx context.Context, value int8) error {
+	e := p.trans.WriteByte(byte(value))
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI16(ctx context.Context, value int16) error {
+	v := p.buffer[0:2]
+	binary.BigEndian.PutUint16(v, uint16(value))
+	_, e := p.trans.Write(v)
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI32(ctx context.Context, value int32) error {
+	v := p.buffer[0:4]
+	binary.BigEndian.PutUint32(v, uint32(value))
+	_, e := p.trans.Write(v)
+	return NewTProtocolException(e)
+}
+
+func (p *TBinaryProtocol) WriteI64(ctx context.Context, value int64) error {
+	v := p.buffer[0:8]
+	binary.BigEndian.PutUint64(v, uint64(value))
+	_, err := p.trans.Write(v)
+	return NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) WriteDouble(ctx context.Context, value float64) error {
+	return p.WriteI64(ctx, int64(math.Float64bits(value)))
+}
+
+func (p *TBinaryProtocol) WriteString(ctx context.Context, value string) error {
+	e := p.WriteI32(ctx, int32(len(value)))
+	if e != nil {
+		return e
+	}
+	_, err := p.trans.WriteString(value)
+	return NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) WriteBinary(ctx context.Context, value []byte) error {
+	e := p.WriteI32(ctx, int32(len(value)))
+	if e != nil {
+		return e
+	}
+	_, err := p.trans.Write(value)
+	return NewTProtocolException(err)
+}
+
+/**
+ * Reading methods
+ */
+
+func (p *TBinaryProtocol) ReadMessageBegin(ctx context.Context) (name string, typeId TMessageType, seqId int32, err error) {
+	size, e := p.ReadI32(ctx)
+	if e != nil {
+		return "", typeId, 0, NewTProtocolException(e)
+	}
+	if size < 0 {
+		typeId = TMessageType(size & 0x0ff)
+		version := int64(int64(size) & VERSION_MASK)
+		if version != VERSION_1 {
+			return name, typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, fmt.Errorf("Bad version in ReadMessageBegin"))
+		}
+		name, e = p.ReadString(ctx)
+		if e != nil {
+			return name, typeId, seqId, NewTProtocolException(e)
+		}
+		seqId, e = p.ReadI32(ctx)
+		if e != nil {
+			return name, typeId, seqId, NewTProtocolException(e)
+		}
+		return name, typeId, seqId, nil
+	}
+	if p.cfg.GetTBinaryStrictRead() {
+		return name, typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, fmt.Errorf("Missing version in ReadMessageBegin"))
+	}
+	name, e2 := p.readStringBody(size)
+	if e2 != nil {
+		return name, typeId, seqId, e2
+	}
+	b, e3 := p.ReadByte(ctx)
+	if e3 != nil {
+		return name, typeId, seqId, e3
+	}
+	typeId = TMessageType(b)
+	seqId, e4 := p.ReadI32(ctx)
+	if e4 != nil {
+		return name, typeId, seqId, e4
+	}
+	return name, typeId, seqId, nil
+}
+
+func (p *TBinaryProtocol) ReadMessageEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadStructBegin(ctx context.Context) (name string, err error) {
+	return
+}
+
+func (p *TBinaryProtocol) ReadStructEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadFieldBegin(ctx context.Context) (name string, typeId TType, seqId int16, err error) {
+	t, err := p.ReadByte(ctx)
+	typeId = TType(t)
+	if err != nil {
+		return name, typeId, seqId, err
+	}
+	if t != STOP {
+		seqId, err = p.ReadI16(ctx)
+	}
+	return name, typeId, seqId, err
+}
+
+func (p *TBinaryProtocol) ReadFieldEnd(ctx context.Context) error {
+	return nil
+}
+
+var invalidDataLength = NewTProtocolExceptionWithType(INVALID_DATA, errors.New("Invalid data length"))
+
+func (p *TBinaryProtocol) ReadMapBegin(ctx context.Context) (kType, vType TType, size int, err error) {
+	k, e := p.ReadByte(ctx)
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	kType = TType(k)
+	v, e := p.ReadByte(ctx)
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	vType = TType(v)
+	size32, e := p.ReadI32(ctx)
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+	return kType, vType, size, nil
+}
+
+func (p *TBinaryProtocol) ReadMapEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadListBegin(ctx context.Context) (elemType TType, size int, err error) {
+	b, e := p.ReadByte(ctx)
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	elemType = TType(b)
+	size32, e := p.ReadI32(ctx)
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+
+	return
+}
+
+func (p *TBinaryProtocol) ReadListEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadSetBegin(ctx context.Context) (elemType TType, size int, err error) {
+	b, e := p.ReadByte(ctx)
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	elemType = TType(b)
+	size32, e := p.ReadI32(ctx)
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+	return elemType, size, nil
+}
+
+func (p *TBinaryProtocol) ReadSetEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TBinaryProtocol) ReadBool(ctx context.Context) (bool, error) {
+	b, e := p.ReadByte(ctx)
+	v := true
+	if b != 1 {
+		v = false
+	}
+	return v, e
+}
+
+func (p *TBinaryProtocol) ReadByte(ctx context.Context) (int8, error) {
+	v, err := p.trans.ReadByte()
+	return int8(v), err
+}
+
+func (p *TBinaryProtocol) ReadI16(ctx context.Context) (value int16, err error) {
+	buf := p.buffer[0:2]
+	err = p.readAll(ctx, buf)
+	value = int16(binary.BigEndian.Uint16(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadI32(ctx context.Context) (value int32, err error) {
+	buf := p.buffer[0:4]
+	err = p.readAll(ctx, buf)
+	value = int32(binary.BigEndian.Uint32(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadI64(ctx context.Context) (value int64, err error) {
+	buf := p.buffer[0:8]
+	err = p.readAll(ctx, buf)
+	value = int64(binary.BigEndian.Uint64(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadDouble(ctx context.Context) (value float64, err error) {
+	buf := p.buffer[0:8]
+	err = p.readAll(ctx, buf)
+	value = math.Float64frombits(binary.BigEndian.Uint64(buf))
+	return value, err
+}
+
+func (p *TBinaryProtocol) ReadString(ctx context.Context) (value string, err error) {
+	size, e := p.ReadI32(ctx)
+	if e != nil {
+		return "", e
+	}
+	err = checkSizeForProtocol(size, p.cfg)
+	if err != nil {
+		return
+	}
+	if size < 0 {
+		err = invalidDataLength
+		return
+	}
+	if size == 0 {
+		return "", nil
+	}
+	if size < int32(len(p.buffer)) {
+		// Avoid allocation on small reads
+		buf := p.buffer[:size]
+		read, e := io.ReadFull(p.trans, buf)
+		return string(buf[:read]), NewTProtocolException(e)
+	}
+
+	return p.readStringBody(size)
+}
+
+func (p *TBinaryProtocol) ReadBinary(ctx context.Context) ([]byte, error) {
+	size, e := p.ReadI32(ctx)
+	if e != nil {
+		return nil, e
+	}
+	if err := checkSizeForProtocol(size, p.cfg); err != nil {
+		return nil, err
+	}
+
+	buf, err := safeReadBytes(size, p.trans)
+	return buf, NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) Flush(ctx context.Context) (err error) {
+	return NewTProtocolException(p.trans.Flush(ctx))
+}
+
+func (p *TBinaryProtocol) Skip(ctx context.Context, fieldType TType) (err error) {
+	return SkipDefaultDepth(ctx, p, fieldType)
+}
+
+func (p *TBinaryProtocol) Transport() TTransport {
+	return p.origTransport
+}
+
+func (p *TBinaryProtocol) readAll(ctx context.Context, buf []byte) (err error) {
+	var read int
+	_, deadlineSet := ctx.Deadline()
+	for {
+		read, err = io.ReadFull(p.trans, buf)
+		if deadlineSet && read == 0 && isTimeoutError(err) && ctx.Err() == nil {
+			// This is I/O timeout without anything read,
+			// and we still have time left, keep retrying.
+			continue
+		}
+		// For anything else, don't retry
+		break
+	}
+	return NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) readStringBody(size int32) (value string, err error) {
+	buf, err := safeReadBytes(size, p.trans)
+	return string(buf), NewTProtocolException(err)
+}
+
+func (p *TBinaryProtocol) SetTConfiguration(conf *TConfiguration) {
+	PropagateTConfiguration(p.trans, conf)
+	PropagateTConfiguration(p.origTransport, conf)
+	p.cfg = conf
+}
+
+var (
+	_ TConfigurationSetter = (*TBinaryProtocolFactory)(nil)
+	_ TConfigurationSetter = (*TBinaryProtocol)(nil)
+)
+
+// This function is shared between TBinaryProtocol and TCompactProtocol.
+//
+// It tries to read size bytes from trans, in a way that prevents large
+// allocations when size is insanely large (mostly caused by malformed message).
+func safeReadBytes(size int32, trans io.Reader) ([]byte, error) {
+	if size < 0 {
+		return nil, nil
+	}
+
+	buf := new(bytes.Buffer)
+	_, err := io.CopyN(buf, trans, int64(size))
+	return buf.Bytes(), err
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/client.go b/vendor/github.com/uber/jaeger-client-go/thrift/client.go
new file mode 100644
index 0000000..ea2c01f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/client.go
@@ -0,0 +1,109 @@
+package thrift
+
+import (
+	"context"
+	"fmt"
+)
+
+// ResponseMeta represents the metadata attached to the response.
+type ResponseMeta struct {
+	// The headers in the response, if any.
+	// If the underlying transport/protocol is not THeader, this will always be nil.
+	Headers THeaderMap
+}
+
+type TClient interface {
+	Call(ctx context.Context, method string, args, result TStruct) (ResponseMeta, error)
+}
+
+type TStandardClient struct {
+	seqId        int32
+	iprot, oprot TProtocol
+}
+
+// TStandardClient implements TClient, and uses the standard message format for Thrift.
+// It is not safe for concurrent use.
+func NewTStandardClient(inputProtocol, outputProtocol TProtocol) *TStandardClient {
+	return &TStandardClient{
+		iprot: inputProtocol,
+		oprot: outputProtocol,
+	}
+}
+
+func (p *TStandardClient) Send(ctx context.Context, oprot TProtocol, seqId int32, method string, args TStruct) error {
+	// Set headers from context object on THeaderProtocol
+	if headerProt, ok := oprot.(*THeaderProtocol); ok {
+		headerProt.ClearWriteHeaders()
+		for _, key := range GetWriteHeaderList(ctx) {
+			if value, ok := GetHeader(ctx, key); ok {
+				headerProt.SetWriteHeader(key, value)
+			}
+		}
+	}
+
+	if err := oprot.WriteMessageBegin(ctx, method, CALL, seqId); err != nil {
+		return err
+	}
+	if err := args.Write(ctx, oprot); err != nil {
+		return err
+	}
+	if err := oprot.WriteMessageEnd(ctx); err != nil {
+		return err
+	}
+	return oprot.Flush(ctx)
+}
+
+func (p *TStandardClient) Recv(ctx context.Context, iprot TProtocol, seqId int32, method string, result TStruct) error {
+	rMethod, rTypeId, rSeqId, err := iprot.ReadMessageBegin(ctx)
+	if err != nil {
+		return err
+	}
+
+	if method != rMethod {
+		return NewTApplicationException(WRONG_METHOD_NAME, fmt.Sprintf("%s: wrong method name", method))
+	} else if seqId != rSeqId {
+		return NewTApplicationException(BAD_SEQUENCE_ID, fmt.Sprintf("%s: out of order sequence response", method))
+	} else if rTypeId == EXCEPTION {
+		var exception tApplicationException
+		if err := exception.Read(ctx, iprot); err != nil {
+			return err
+		}
+
+		if err := iprot.ReadMessageEnd(ctx); err != nil {
+			return err
+		}
+
+		return &exception
+	} else if rTypeId != REPLY {
+		return NewTApplicationException(INVALID_MESSAGE_TYPE_EXCEPTION, fmt.Sprintf("%s: invalid message type", method))
+	}
+
+	if err := result.Read(ctx, iprot); err != nil {
+		return err
+	}
+
+	return iprot.ReadMessageEnd(ctx)
+}
+
+func (p *TStandardClient) Call(ctx context.Context, method string, args, result TStruct) (ResponseMeta, error) {
+	p.seqId++
+	seqId := p.seqId
+
+	if err := p.Send(ctx, p.oprot, seqId, method, args); err != nil {
+		return ResponseMeta{}, err
+	}
+
+	// method is oneway
+	if result == nil {
+		return ResponseMeta{}, nil
+	}
+
+	err := p.Recv(ctx, p.iprot, seqId, method, result)
+	var headers THeaderMap
+	if hp, ok := p.iprot.(*THeaderProtocol); ok {
+		headers = hp.transport.readHeaders
+	}
+	return ResponseMeta{
+		Headers: headers,
+	}, err
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/compact_protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/compact_protocol.go
new file mode 100644
index 0000000..a49225d
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/compact_protocol.go
@@ -0,0 +1,865 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+)
+
+const (
+	COMPACT_PROTOCOL_ID       = 0x082
+	COMPACT_VERSION           = 1
+	COMPACT_VERSION_MASK      = 0x1f
+	COMPACT_TYPE_MASK         = 0x0E0
+	COMPACT_TYPE_BITS         = 0x07
+	COMPACT_TYPE_SHIFT_AMOUNT = 5
+)
+
+type tCompactType byte
+
+const (
+	COMPACT_BOOLEAN_TRUE  = 0x01
+	COMPACT_BOOLEAN_FALSE = 0x02
+	COMPACT_BYTE          = 0x03
+	COMPACT_I16           = 0x04
+	COMPACT_I32           = 0x05
+	COMPACT_I64           = 0x06
+	COMPACT_DOUBLE        = 0x07
+	COMPACT_BINARY        = 0x08
+	COMPACT_LIST          = 0x09
+	COMPACT_SET           = 0x0A
+	COMPACT_MAP           = 0x0B
+	COMPACT_STRUCT        = 0x0C
+)
+
+var (
+	ttypeToCompactType map[TType]tCompactType
+)
+
+func init() {
+	ttypeToCompactType = map[TType]tCompactType{
+		STOP:   STOP,
+		BOOL:   COMPACT_BOOLEAN_TRUE,
+		BYTE:   COMPACT_BYTE,
+		I16:    COMPACT_I16,
+		I32:    COMPACT_I32,
+		I64:    COMPACT_I64,
+		DOUBLE: COMPACT_DOUBLE,
+		STRING: COMPACT_BINARY,
+		LIST:   COMPACT_LIST,
+		SET:    COMPACT_SET,
+		MAP:    COMPACT_MAP,
+		STRUCT: COMPACT_STRUCT,
+	}
+}
+
+type TCompactProtocolFactory struct {
+	cfg *TConfiguration
+}
+
+// Deprecated: Use NewTCompactProtocolFactoryConf instead.
+func NewTCompactProtocolFactory() *TCompactProtocolFactory {
+	return NewTCompactProtocolFactoryConf(&TConfiguration{
+		noPropagation: true,
+	})
+}
+
+func NewTCompactProtocolFactoryConf(conf *TConfiguration) *TCompactProtocolFactory {
+	return &TCompactProtocolFactory{
+		cfg: conf,
+	}
+}
+
+func (p *TCompactProtocolFactory) GetProtocol(trans TTransport) TProtocol {
+	return NewTCompactProtocolConf(trans, p.cfg)
+}
+
+func (p *TCompactProtocolFactory) SetTConfiguration(conf *TConfiguration) {
+	p.cfg = conf
+}
+
+type TCompactProtocol struct {
+	trans         TRichTransport
+	origTransport TTransport
+
+	cfg *TConfiguration
+
+	// Used to keep track of the last field for the current and previous structs,
+	// so we can do the delta stuff.
+	lastField   []int
+	lastFieldId int
+
+	// If we encounter a boolean field begin, save the TField here so it can
+	// have the value incorporated.
+	booleanFieldName    string
+	booleanFieldId      int16
+	booleanFieldPending bool
+
+	// If we read a field header, and it's a boolean field, save the boolean
+	// value here so that readBool can use it.
+	boolValue          bool
+	boolValueIsNotNull bool
+	buffer             [64]byte
+}
+
+// Deprecated: Use NewTCompactProtocolConf instead.
+func NewTCompactProtocol(trans TTransport) *TCompactProtocol {
+	return NewTCompactProtocolConf(trans, &TConfiguration{
+		noPropagation: true,
+	})
+}
+
+func NewTCompactProtocolConf(trans TTransport, conf *TConfiguration) *TCompactProtocol {
+	PropagateTConfiguration(trans, conf)
+	p := &TCompactProtocol{
+		origTransport: trans,
+		cfg:           conf,
+	}
+	if et, ok := trans.(TRichTransport); ok {
+		p.trans = et
+	} else {
+		p.trans = NewTRichTransport(trans)
+	}
+
+	return p
+}
+
+//
+// Public Writing methods.
+//
+
+// Write a message header to the wire. Compact Protocol messages contain the
+// protocol version so we can migrate forwards in the future if need be.
+func (p *TCompactProtocol) WriteMessageBegin(ctx context.Context, name string, typeId TMessageType, seqid int32) error {
+	err := p.writeByteDirect(COMPACT_PROTOCOL_ID)
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	err = p.writeByteDirect((COMPACT_VERSION & COMPACT_VERSION_MASK) | ((byte(typeId) << COMPACT_TYPE_SHIFT_AMOUNT) & COMPACT_TYPE_MASK))
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	_, err = p.writeVarint32(seqid)
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	e := p.WriteString(ctx, name)
+	return e
+
+}
+
+func (p *TCompactProtocol) WriteMessageEnd(ctx context.Context) error { return nil }
+
+// Write a struct begin. This doesn't actually put anything on the wire. We
+// use it as an opportunity to put special placeholder markers on the field
+// stack so we can get the field id deltas correct.
+func (p *TCompactProtocol) WriteStructBegin(ctx context.Context, name string) error {
+	p.lastField = append(p.lastField, p.lastFieldId)
+	p.lastFieldId = 0
+	return nil
+}
+
+// Write a struct end. This doesn't actually put anything on the wire. We use
+// this as an opportunity to pop the last field from the current struct off
+// of the field stack.
+func (p *TCompactProtocol) WriteStructEnd(ctx context.Context) error {
+	if len(p.lastField) <= 0 {
+		return NewTProtocolExceptionWithType(INVALID_DATA, errors.New("WriteStructEnd called without matching WriteStructBegin call before"))
+	}
+	p.lastFieldId = p.lastField[len(p.lastField)-1]
+	p.lastField = p.lastField[:len(p.lastField)-1]
+	return nil
+}
+
+func (p *TCompactProtocol) WriteFieldBegin(ctx context.Context, name string, typeId TType, id int16) error {
+	if typeId == BOOL {
+		// we want to possibly include the value, so we'll wait.
+		p.booleanFieldName, p.booleanFieldId, p.booleanFieldPending = name, id, true
+		return nil
+	}
+	_, err := p.writeFieldBeginInternal(ctx, name, typeId, id, 0xFF)
+	return NewTProtocolException(err)
+}
+
+// The workhorse of writeFieldBegin. It has the option of doing a
+// 'type override' of the type header. This is used specifically in the
+// boolean field case.
+func (p *TCompactProtocol) writeFieldBeginInternal(ctx context.Context, name string, typeId TType, id int16, typeOverride byte) (int, error) {
+	// short lastField = lastField_.pop();
+
+	// if there's a type override, use that.
+	var typeToWrite byte
+	if typeOverride == 0xFF {
+		typeToWrite = byte(p.getCompactType(typeId))
+	} else {
+		typeToWrite = typeOverride
+	}
+	// check if we can use delta encoding for the field id
+	fieldId := int(id)
+	written := 0
+	if fieldId > p.lastFieldId && fieldId-p.lastFieldId <= 15 {
+		// write them together
+		err := p.writeByteDirect(byte((fieldId-p.lastFieldId)<<4) | typeToWrite)
+		if err != nil {
+			return 0, err
+		}
+	} else {
+		// write them separate
+		err := p.writeByteDirect(typeToWrite)
+		if err != nil {
+			return 0, err
+		}
+		err = p.WriteI16(ctx, id)
+		written = 1 + 2
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	p.lastFieldId = fieldId
+	return written, nil
+}
+
+func (p *TCompactProtocol) WriteFieldEnd(ctx context.Context) error { return nil }
+
+func (p *TCompactProtocol) WriteFieldStop(ctx context.Context) error {
+	err := p.writeByteDirect(STOP)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteMapBegin(ctx context.Context, keyType TType, valueType TType, size int) error {
+	if size == 0 {
+		err := p.writeByteDirect(0)
+		return NewTProtocolException(err)
+	}
+	_, err := p.writeVarint32(int32(size))
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	err = p.writeByteDirect(byte(p.getCompactType(keyType))<<4 | byte(p.getCompactType(valueType)))
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteMapEnd(ctx context.Context) error { return nil }
+
+// Write a list header.
+func (p *TCompactProtocol) WriteListBegin(ctx context.Context, elemType TType, size int) error {
+	_, err := p.writeCollectionBegin(elemType, size)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteListEnd(ctx context.Context) error { return nil }
+
+// Write a set header.
+func (p *TCompactProtocol) WriteSetBegin(ctx context.Context, elemType TType, size int) error {
+	_, err := p.writeCollectionBegin(elemType, size)
+	return NewTProtocolException(err)
+}
+
+func (p *TCompactProtocol) WriteSetEnd(ctx context.Context) error { return nil }
+
+func (p *TCompactProtocol) WriteBool(ctx context.Context, value bool) error {
+	v := byte(COMPACT_BOOLEAN_FALSE)
+	if value {
+		v = byte(COMPACT_BOOLEAN_TRUE)
+	}
+	if p.booleanFieldPending {
+		// we haven't written the field header yet
+		_, err := p.writeFieldBeginInternal(ctx, p.booleanFieldName, BOOL, p.booleanFieldId, v)
+		p.booleanFieldPending = false
+		return NewTProtocolException(err)
+	}
+	// we're not part of a field, so just write the value.
+	err := p.writeByteDirect(v)
+	return NewTProtocolException(err)
+}
+
+// Write a byte. Nothing to see here!
+func (p *TCompactProtocol) WriteByte(ctx context.Context, value int8) error {
+	err := p.writeByteDirect(byte(value))
+	return NewTProtocolException(err)
+}
+
+// Write an I16 as a zigzag varint.
+func (p *TCompactProtocol) WriteI16(ctx context.Context, value int16) error {
+	_, err := p.writeVarint32(p.int32ToZigzag(int32(value)))
+	return NewTProtocolException(err)
+}
+
+// Write an i32 as a zigzag varint.
+func (p *TCompactProtocol) WriteI32(ctx context.Context, value int32) error {
+	_, err := p.writeVarint32(p.int32ToZigzag(value))
+	return NewTProtocolException(err)
+}
+
+// Write an i64 as a zigzag varint.
+func (p *TCompactProtocol) WriteI64(ctx context.Context, value int64) error {
+	_, err := p.writeVarint64(p.int64ToZigzag(value))
+	return NewTProtocolException(err)
+}
+
+// Write a double to the wire as 8 bytes.
+func (p *TCompactProtocol) WriteDouble(ctx context.Context, value float64) error {
+	buf := p.buffer[0:8]
+	binary.LittleEndian.PutUint64(buf, math.Float64bits(value))
+	_, err := p.trans.Write(buf)
+	return NewTProtocolException(err)
+}
+
+// Write a string to the wire with a varint size preceding.
+func (p *TCompactProtocol) WriteString(ctx context.Context, value string) error {
+	_, e := p.writeVarint32(int32(len(value)))
+	if e != nil {
+		return NewTProtocolException(e)
+	}
+	if len(value) > 0 {
+	}
+	_, e = p.trans.WriteString(value)
+	return e
+}
+
+// Write a byte array, using a varint for the size.
+func (p *TCompactProtocol) WriteBinary(ctx context.Context, bin []byte) error {
+	_, e := p.writeVarint32(int32(len(bin)))
+	if e != nil {
+		return NewTProtocolException(e)
+	}
+	if len(bin) > 0 {
+		_, e = p.trans.Write(bin)
+		return NewTProtocolException(e)
+	}
+	return nil
+}
+
+//
+// Reading methods.
+//
+
+// Read a message header.
+func (p *TCompactProtocol) ReadMessageBegin(ctx context.Context) (name string, typeId TMessageType, seqId int32, err error) {
+	var protocolId byte
+
+	_, deadlineSet := ctx.Deadline()
+	for {
+		protocolId, err = p.readByteDirect()
+		if deadlineSet && isTimeoutError(err) && ctx.Err() == nil {
+			// keep retrying I/O timeout errors since we still have
+			// time left
+			continue
+		}
+		// For anything else, don't retry
+		break
+	}
+	if err != nil {
+		return
+	}
+
+	if protocolId != COMPACT_PROTOCOL_ID {
+		e := fmt.Errorf("Expected protocol id %02x but got %02x", COMPACT_PROTOCOL_ID, protocolId)
+		return "", typeId, seqId, NewTProtocolExceptionWithType(BAD_VERSION, e)
+	}
+
+	versionAndType, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+
+	version := versionAndType & COMPACT_VERSION_MASK
+	typeId = TMessageType((versionAndType >> COMPACT_TYPE_SHIFT_AMOUNT) & COMPACT_TYPE_BITS)
+	if version != COMPACT_VERSION {
+		e := fmt.Errorf("Expected version %02x but got %02x", COMPACT_VERSION, version)
+		err = NewTProtocolExceptionWithType(BAD_VERSION, e)
+		return
+	}
+	seqId, e := p.readVarint32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	name, err = p.ReadString(ctx)
+	return
+}
+
+func (p *TCompactProtocol) ReadMessageEnd(ctx context.Context) error { return nil }
+
+// Read a struct begin. There's nothing on the wire for this, but it is our
+// opportunity to push a new struct begin marker onto the field stack.
+func (p *TCompactProtocol) ReadStructBegin(ctx context.Context) (name string, err error) {
+	p.lastField = append(p.lastField, p.lastFieldId)
+	p.lastFieldId = 0
+	return
+}
+
+// Doesn't actually consume any wire data, just removes the last field for
+// this struct from the field stack.
+func (p *TCompactProtocol) ReadStructEnd(ctx context.Context) error {
+	// consume the last field we read off the wire.
+	if len(p.lastField) <= 0 {
+		return NewTProtocolExceptionWithType(INVALID_DATA, errors.New("ReadStructEnd called without matching ReadStructBegin call before"))
+	}
+	p.lastFieldId = p.lastField[len(p.lastField)-1]
+	p.lastField = p.lastField[:len(p.lastField)-1]
+	return nil
+}
+
+// Read a field header off the wire.
+func (p *TCompactProtocol) ReadFieldBegin(ctx context.Context) (name string, typeId TType, id int16, err error) {
+	t, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+
+	// if it's a stop, then we can return immediately, as the struct is over.
+	if (t & 0x0f) == STOP {
+		return "", STOP, 0, nil
+	}
+
+	// mask off the 4 MSB of the type header. it could contain a field id delta.
+	modifier := int16((t & 0xf0) >> 4)
+	if modifier == 0 {
+		// not a delta. look ahead for the zigzag varint field id.
+		id, err = p.ReadI16(ctx)
+		if err != nil {
+			return
+		}
+	} else {
+		// has a delta. add the delta to the last read field id.
+		id = int16(p.lastFieldId) + modifier
+	}
+	typeId, e := p.getTType(tCompactType(t & 0x0f))
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+
+	// if this happens to be a boolean field, the value is encoded in the type
+	if p.isBoolType(t) {
+		// save the boolean value in a special instance variable.
+		p.boolValue = (byte(t)&0x0f == COMPACT_BOOLEAN_TRUE)
+		p.boolValueIsNotNull = true
+	}
+
+	// push the new field onto the field stack so we can keep the deltas going.
+	p.lastFieldId = int(id)
+	return
+}
+
+func (p *TCompactProtocol) ReadFieldEnd(ctx context.Context) error { return nil }
+
+// Read a map header off the wire. If the size is zero, skip reading the key
+// and value type. This means that 0-length maps will yield TMaps without the
+// "correct" types.
+func (p *TCompactProtocol) ReadMapBegin(ctx context.Context) (keyType TType, valueType TType, size int, err error) {
+	size32, e := p.readVarint32()
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	if size32 < 0 {
+		err = invalidDataLength
+		return
+	}
+	size = int(size32)
+
+	keyAndValueType := byte(STOP)
+	if size != 0 {
+		keyAndValueType, err = p.readByteDirect()
+		if err != nil {
+			return
+		}
+	}
+	keyType, _ = p.getTType(tCompactType(keyAndValueType >> 4))
+	valueType, _ = p.getTType(tCompactType(keyAndValueType & 0xf))
+	return
+}
+
+func (p *TCompactProtocol) ReadMapEnd(ctx context.Context) error { return nil }
+
+// Read a list header off the wire. If the list size is 0-14, the size will
+// be packed into the element type header. If it's a longer list, the 4 MSB
+// of the element type header will be 0xF, and a varint will follow with the
+// true size.
+func (p *TCompactProtocol) ReadListBegin(ctx context.Context) (elemType TType, size int, err error) {
+	size_and_type, err := p.readByteDirect()
+	if err != nil {
+		return
+	}
+	size = int((size_and_type >> 4) & 0x0f)
+	if size == 15 {
+		size2, e := p.readVarint32()
+		if e != nil {
+			err = NewTProtocolException(e)
+			return
+		}
+		if size2 < 0 {
+			err = invalidDataLength
+			return
+		}
+		size = int(size2)
+	}
+	elemType, e := p.getTType(tCompactType(size_and_type))
+	if e != nil {
+		err = NewTProtocolException(e)
+		return
+	}
+	return
+}
+
+func (p *TCompactProtocol) ReadListEnd(ctx context.Context) error { return nil }
+
+// Read a set header off the wire. If the set size is 0-14, the size will
+// be packed into the element type header. If it's a longer set, the 4 MSB
+// of the element type header will be 0xF, and a varint will follow with the
+// true size.
+func (p *TCompactProtocol) ReadSetBegin(ctx context.Context) (elemType TType, size int, err error) {
+	return p.ReadListBegin(ctx)
+}
+
+func (p *TCompactProtocol) ReadSetEnd(ctx context.Context) error { return nil }
+
+// Read a boolean off the wire. If this is a boolean field, the value should
+// already have been read during readFieldBegin, so we'll just consume the
+// pre-stored value. Otherwise, read a byte.
+func (p *TCompactProtocol) ReadBool(ctx context.Context) (value bool, err error) {
+	if p.boolValueIsNotNull {
+		p.boolValueIsNotNull = false
+		return p.boolValue, nil
+	}
+	v, err := p.readByteDirect()
+	return v == COMPACT_BOOLEAN_TRUE, err
+}
+
+// Read a single byte off the wire. Nothing interesting here.
+func (p *TCompactProtocol) ReadByte(ctx context.Context) (int8, error) {
+	v, err := p.readByteDirect()
+	if err != nil {
+		return 0, NewTProtocolException(err)
+	}
+	return int8(v), err
+}
+
+// Read an i16 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI16(ctx context.Context) (value int16, err error) {
+	v, err := p.ReadI32(ctx)
+	return int16(v), err
+}
+
+// Read an i32 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI32(ctx context.Context) (value int32, err error) {
+	v, e := p.readVarint32()
+	if e != nil {
+		return 0, NewTProtocolException(e)
+	}
+	value = p.zigzagToInt32(v)
+	return value, nil
+}
+
+// Read an i64 from the wire as a zigzag varint.
+func (p *TCompactProtocol) ReadI64(ctx context.Context) (value int64, err error) {
+	v, e := p.readVarint64()
+	if e != nil {
+		return 0, NewTProtocolException(e)
+	}
+	value = p.zigzagToInt64(v)
+	return value, nil
+}
+
+// No magic here - just read a double off the wire.
+func (p *TCompactProtocol) ReadDouble(ctx context.Context) (value float64, err error) {
+	longBits := p.buffer[0:8]
+	_, e := io.ReadFull(p.trans, longBits)
+	if e != nil {
+		return 0.0, NewTProtocolException(e)
+	}
+	return math.Float64frombits(p.bytesToUint64(longBits)), nil
+}
+
+// Reads a []byte (via readBinary), and then UTF-8 decodes it.
+func (p *TCompactProtocol) ReadString(ctx context.Context) (value string, err error) {
+	length, e := p.readVarint32()
+	if e != nil {
+		return "", NewTProtocolException(e)
+	}
+	err = checkSizeForProtocol(length, p.cfg)
+	if err != nil {
+		return
+	}
+	if length == 0 {
+		return "", nil
+	}
+	if length < int32(len(p.buffer)) {
+		// Avoid allocation on small reads
+		buf := p.buffer[:length]
+		read, e := io.ReadFull(p.trans, buf)
+		return string(buf[:read]), NewTProtocolException(e)
+	}
+
+	buf, e := safeReadBytes(length, p.trans)
+	return string(buf), NewTProtocolException(e)
+}
+
+// Read a []byte from the wire.
+func (p *TCompactProtocol) ReadBinary(ctx context.Context) (value []byte, err error) {
+	length, e := p.readVarint32()
+	if e != nil {
+		return nil, NewTProtocolException(e)
+	}
+	err = checkSizeForProtocol(length, p.cfg)
+	if err != nil {
+		return
+	}
+	if length == 0 {
+		return []byte{}, nil
+	}
+
+	buf, e := safeReadBytes(length, p.trans)
+	return buf, NewTProtocolException(e)
+}
+
+func (p *TCompactProtocol) Flush(ctx context.Context) (err error) {
+	return NewTProtocolException(p.trans.Flush(ctx))
+}
+
+func (p *TCompactProtocol) Skip(ctx context.Context, fieldType TType) (err error) {
+	return SkipDefaultDepth(ctx, p, fieldType)
+}
+
+func (p *TCompactProtocol) Transport() TTransport {
+	return p.origTransport
+}
+
+//
+// Internal writing methods
+//
+
+// Abstract method for writing the start of lists and sets. List and sets on
+// the wire differ only by the type indicator.
+func (p *TCompactProtocol) writeCollectionBegin(elemType TType, size int) (int, error) {
+	if size <= 14 {
+		return 1, p.writeByteDirect(byte(int32(size<<4) | int32(p.getCompactType(elemType))))
+	}
+	err := p.writeByteDirect(0xf0 | byte(p.getCompactType(elemType)))
+	if err != nil {
+		return 0, err
+	}
+	m, err := p.writeVarint32(int32(size))
+	return 1 + m, err
+}
+
+// Write an i32 as a varint. Results in 1-5 bytes on the wire.
+// TODO(pomack): make a permanent buffer like writeVarint64?
+func (p *TCompactProtocol) writeVarint32(n int32) (int, error) {
+	i32buf := p.buffer[0:5]
+	idx := 0
+	for {
+		if (n & ^0x7F) == 0 {
+			i32buf[idx] = byte(n)
+			idx++
+			// p.writeByteDirect(byte(n));
+			break
+			// return;
+		} else {
+			i32buf[idx] = byte((n & 0x7F) | 0x80)
+			idx++
+			// p.writeByteDirect(byte(((n & 0x7F) | 0x80)));
+			u := uint32(n)
+			n = int32(u >> 7)
+		}
+	}
+	return p.trans.Write(i32buf[0:idx])
+}
+
+// Write an i64 as a varint. Results in 1-10 bytes on the wire.
+func (p *TCompactProtocol) writeVarint64(n int64) (int, error) {
+	varint64out := p.buffer[0:10]
+	idx := 0
+	for {
+		if (n & ^0x7F) == 0 {
+			varint64out[idx] = byte(n)
+			idx++
+			break
+		} else {
+			varint64out[idx] = byte((n & 0x7F) | 0x80)
+			idx++
+			u := uint64(n)
+			n = int64(u >> 7)
+		}
+	}
+	return p.trans.Write(varint64out[0:idx])
+}
+
+// Convert l into a zigzag long. This allows negative numbers to be
+// represented compactly as a varint.
+func (p *TCompactProtocol) int64ToZigzag(l int64) int64 {
+	return (l << 1) ^ (l >> 63)
+}
+
+// Convert l into a zigzag long. This allows negative numbers to be
+// represented compactly as a varint.
+func (p *TCompactProtocol) int32ToZigzag(n int32) int32 {
+	return (n << 1) ^ (n >> 31)
+}
+
+func (p *TCompactProtocol) fixedUint64ToBytes(n uint64, buf []byte) {
+	binary.LittleEndian.PutUint64(buf, n)
+}
+
+func (p *TCompactProtocol) fixedInt64ToBytes(n int64, buf []byte) {
+	binary.LittleEndian.PutUint64(buf, uint64(n))
+}
+
+// Writes a byte without any possibility of all that field header nonsense.
+// Used internally by other writing methods that know they need to write a byte.
+func (p *TCompactProtocol) writeByteDirect(b byte) error {
+	return p.trans.WriteByte(b)
+}
+
+// Writes a byte without any possibility of all that field header nonsense.
+func (p *TCompactProtocol) writeIntAsByteDirect(n int) (int, error) {
+	return 1, p.writeByteDirect(byte(n))
+}
+
+//
+// Internal reading methods
+//
+
+// Read an i32 from the wire as a varint. The MSB of each byte is set
+// if there is another byte to follow. This can read up to 5 bytes.
+func (p *TCompactProtocol) readVarint32() (int32, error) {
+	// if the wire contains the right stuff, this will just truncate the i64 we
+	// read and get us the right sign.
+	v, err := p.readVarint64()
+	return int32(v), err
+}
+
+// Read an i64 from the wire as a proper varint. The MSB of each byte is set
+// if there is another byte to follow. This can read up to 10 bytes.
+func (p *TCompactProtocol) readVarint64() (int64, error) {
+	shift := uint(0)
+	result := int64(0)
+	for {
+		b, err := p.readByteDirect()
+		if err != nil {
+			return 0, err
+		}
+		result |= int64(b&0x7f) << shift
+		if (b & 0x80) != 0x80 {
+			break
+		}
+		shift += 7
+	}
+	return result, nil
+}
+
+// Read a byte, unlike ReadByte that reads Thrift-byte that is i8.
+func (p *TCompactProtocol) readByteDirect() (byte, error) {
+	return p.trans.ReadByte()
+}
+
+//
+// encoding helpers
+//
+
+// Convert from zigzag int to int.
+func (p *TCompactProtocol) zigzagToInt32(n int32) int32 {
+	u := uint32(n)
+	return int32(u>>1) ^ -(n & 1)
+}
+
+// Convert from zigzag long to long.
+func (p *TCompactProtocol) zigzagToInt64(n int64) int64 {
+	u := uint64(n)
+	return int64(u>>1) ^ -(n & 1)
+}
+
+// Note that it's important that the mask bytes are long literals,
+// otherwise they'll default to ints, and when you shift an int left 56 bits,
+// you just get a messed up int.
+func (p *TCompactProtocol) bytesToInt64(b []byte) int64 {
+	return int64(binary.LittleEndian.Uint64(b))
+}
+
+// Note that it's important that the mask bytes are long literals,
+// otherwise they'll default to ints, and when you shift an int left 56 bits,
+// you just get a messed up int.
+func (p *TCompactProtocol) bytesToUint64(b []byte) uint64 {
+	return binary.LittleEndian.Uint64(b)
+}
+
+//
+// type testing and converting
+//
+
+func (p *TCompactProtocol) isBoolType(b byte) bool {
+	return (b&0x0f) == COMPACT_BOOLEAN_TRUE || (b&0x0f) == COMPACT_BOOLEAN_FALSE
+}
+
+// Given a tCompactType constant, convert it to its corresponding
+// TType value.
+func (p *TCompactProtocol) getTType(t tCompactType) (TType, error) {
+	switch byte(t) & 0x0f {
+	case STOP:
+		return STOP, nil
+	case COMPACT_BOOLEAN_FALSE, COMPACT_BOOLEAN_TRUE:
+		return BOOL, nil
+	case COMPACT_BYTE:
+		return BYTE, nil
+	case COMPACT_I16:
+		return I16, nil
+	case COMPACT_I32:
+		return I32, nil
+	case COMPACT_I64:
+		return I64, nil
+	case COMPACT_DOUBLE:
+		return DOUBLE, nil
+	case COMPACT_BINARY:
+		return STRING, nil
+	case COMPACT_LIST:
+		return LIST, nil
+	case COMPACT_SET:
+		return SET, nil
+	case COMPACT_MAP:
+		return MAP, nil
+	case COMPACT_STRUCT:
+		return STRUCT, nil
+	}
+	return STOP, NewTProtocolException(fmt.Errorf("don't know what type: %v", t&0x0f))
+}
+
+// Given a TType value, find the appropriate TCompactProtocol.Types constant.
+func (p *TCompactProtocol) getCompactType(t TType) tCompactType {
+	return ttypeToCompactType[t]
+}
+
+func (p *TCompactProtocol) SetTConfiguration(conf *TConfiguration) {
+	PropagateTConfiguration(p.trans, conf)
+	PropagateTConfiguration(p.origTransport, conf)
+	p.cfg = conf
+}
+
+var (
+	_ TConfigurationSetter = (*TCompactProtocolFactory)(nil)
+	_ TConfigurationSetter = (*TCompactProtocol)(nil)
+)
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/configuration.go b/vendor/github.com/uber/jaeger-client-go/thrift/configuration.go
new file mode 100644
index 0000000..454d9f3
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/configuration.go
@@ -0,0 +1,378 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"crypto/tls"
+	"fmt"
+	"time"
+)
+
+// Default TConfiguration values.
+const (
+	DEFAULT_MAX_MESSAGE_SIZE = 100 * 1024 * 1024
+	DEFAULT_MAX_FRAME_SIZE   = 16384000
+
+	DEFAULT_TBINARY_STRICT_READ  = false
+	DEFAULT_TBINARY_STRICT_WRITE = true
+
+	DEFAULT_CONNECT_TIMEOUT = 0
+	DEFAULT_SOCKET_TIMEOUT  = 0
+)
+
+// TConfiguration defines some configurations shared between TTransport,
+// TProtocol, TTransportFactory, TProtocolFactory, and other implementations.
+//
+// When constructing TConfiguration, you only need to specify the non-default
+// fields. All zero values have sane default values.
+//
+// Not all configurations defined are applicable to all implementations.
+// Implementations are free to ignore the configurations not applicable to them.
+//
+// All functions attached to this type are nil-safe.
+//
+// See [1] for spec.
+//
+// NOTE: When using TConfiguration, fill in all the configurations you want to
+// set across the stack, not only the ones you want to set in the immediate
+// TTransport/TProtocol.
+//
+// For example, say you want to migrate this old code into using TConfiguration:
+//
+//     sccket := thrift.NewTSocketTimeout("host:port", time.Second)
+//     transFactory := thrift.NewTFramedTransportFactoryMaxLength(
+//         thrift.NewTTransportFactory(),
+//         1024 * 1024 * 256,
+//     )
+//     protoFactory := thrift.NewTBinaryProtocolFactory(true, true)
+//
+// This is the wrong way to do it because in the end the TConfiguration used by
+// socket and transFactory will be overwritten by the one used by protoFactory
+// because of TConfiguration propagation:
+//
+//     // bad example, DO NOT USE
+//     sccket := thrift.NewTSocketConf("host:port", &thrift.TConfiguration{
+//         ConnectTimeout: time.Second,
+//         SocketTimeout:  time.Second,
+//     })
+//     transFactory := thrift.NewTFramedTransportFactoryConf(
+//         thrift.NewTTransportFactory(),
+//         &thrift.TConfiguration{
+//             MaxFrameSize: 1024 * 1024 * 256,
+//         },
+//     )
+//     protoFactory := thrift.NewTBinaryProtocolFactoryConf(&thrift.TConfiguration{
+//         TBinaryStrictRead:  thrift.BoolPtr(true),
+//         TBinaryStrictWrite: thrift.BoolPtr(true),
+//     })
+//
+// This is the correct way to do it:
+//
+//     conf := &thrift.TConfiguration{
+//         ConnectTimeout: time.Second,
+//         SocketTimeout:  time.Second,
+//
+//         MaxFrameSize: 1024 * 1024 * 256,
+//
+//         TBinaryStrictRead:  thrift.BoolPtr(true),
+//         TBinaryStrictWrite: thrift.BoolPtr(true),
+//     }
+//     sccket := thrift.NewTSocketConf("host:port", conf)
+//     transFactory := thrift.NewTFramedTransportFactoryConf(thrift.NewTTransportFactory(), conf)
+//     protoFactory := thrift.NewTBinaryProtocolFactoryConf(conf)
+//
+// [1]: https://github.com/apache/thrift/blob/master/doc/specs/thrift-tconfiguration.md
+type TConfiguration struct {
+	// If <= 0, DEFAULT_MAX_MESSAGE_SIZE will be used instead.
+	MaxMessageSize int32
+
+	// If <= 0, DEFAULT_MAX_FRAME_SIZE will be used instead.
+	//
+	// Also if MaxMessageSize < MaxFrameSize,
+	// MaxMessageSize will be used instead.
+	MaxFrameSize int32
+
+	// Connect and socket timeouts to be used by TSocket and TSSLSocket.
+	//
+	// 0 means no timeout.
+	//
+	// If <0, DEFAULT_CONNECT_TIMEOUT and DEFAULT_SOCKET_TIMEOUT will be
+	// used.
+	ConnectTimeout time.Duration
+	SocketTimeout  time.Duration
+
+	// TLS config to be used by TSSLSocket.
+	TLSConfig *tls.Config
+
+	// Strict read/write configurations for TBinaryProtocol.
+	//
+	// BoolPtr helper function is available to use literal values.
+	TBinaryStrictRead  *bool
+	TBinaryStrictWrite *bool
+
+	// The wrapped protocol id to be used in THeader transport/protocol.
+	//
+	// THeaderProtocolIDPtr and THeaderProtocolIDPtrMust helper functions
+	// are provided to help filling this value.
+	THeaderProtocolID *THeaderProtocolID
+
+	// Used internally by deprecated constructors, to avoid overriding
+	// underlying TTransport/TProtocol's cfg by accidental propagations.
+	//
+	// For external users this is always false.
+	noPropagation bool
+}
+
+// GetMaxMessageSize returns the max message size an implementation should
+// follow.
+//
+// It's nil-safe. DEFAULT_MAX_MESSAGE_SIZE will be returned if tc is nil.
+func (tc *TConfiguration) GetMaxMessageSize() int32 {
+	if tc == nil || tc.MaxMessageSize <= 0 {
+		return DEFAULT_MAX_MESSAGE_SIZE
+	}
+	return tc.MaxMessageSize
+}
+
+// GetMaxFrameSize returns the max frame size an implementation should follow.
+//
+// It's nil-safe. DEFAULT_MAX_FRAME_SIZE will be returned if tc is nil.
+//
+// If the configured max message size is smaller than the configured max frame
+// size, the smaller one will be returned instead.
+func (tc *TConfiguration) GetMaxFrameSize() int32 {
+	if tc == nil {
+		return DEFAULT_MAX_FRAME_SIZE
+	}
+	maxFrameSize := tc.MaxFrameSize
+	if maxFrameSize <= 0 {
+		maxFrameSize = DEFAULT_MAX_FRAME_SIZE
+	}
+	if maxMessageSize := tc.GetMaxMessageSize(); maxMessageSize < maxFrameSize {
+		return maxMessageSize
+	}
+	return maxFrameSize
+}
+
+// GetConnectTimeout returns the connect timeout should be used by TSocket and
+// TSSLSocket.
+//
+// It's nil-safe. If tc is nil, DEFAULT_CONNECT_TIMEOUT will be returned instead.
+func (tc *TConfiguration) GetConnectTimeout() time.Duration {
+	if tc == nil || tc.ConnectTimeout < 0 {
+		return DEFAULT_CONNECT_TIMEOUT
+	}
+	return tc.ConnectTimeout
+}
+
+// GetSocketTimeout returns the socket timeout should be used by TSocket and
+// TSSLSocket.
+//
+// It's nil-safe. If tc is nil, DEFAULT_SOCKET_TIMEOUT will be returned instead.
+func (tc *TConfiguration) GetSocketTimeout() time.Duration {
+	if tc == nil || tc.SocketTimeout < 0 {
+		return DEFAULT_SOCKET_TIMEOUT
+	}
+	return tc.SocketTimeout
+}
+
+// GetTLSConfig returns the tls config should be used by TSSLSocket.
+//
+// It's nil-safe. If tc is nil, nil will be returned instead.
+func (tc *TConfiguration) GetTLSConfig() *tls.Config {
+	if tc == nil {
+		return nil
+	}
+	return tc.TLSConfig
+}
+
+// GetTBinaryStrictRead returns the strict read configuration TBinaryProtocol
+// should follow.
+//
+// It's nil-safe. DEFAULT_TBINARY_STRICT_READ will be returned if either tc or
+// tc.TBinaryStrictRead is nil.
+func (tc *TConfiguration) GetTBinaryStrictRead() bool {
+	if tc == nil || tc.TBinaryStrictRead == nil {
+		return DEFAULT_TBINARY_STRICT_READ
+	}
+	return *tc.TBinaryStrictRead
+}
+
+// GetTBinaryStrictWrite returns the strict read configuration TBinaryProtocol
+// should follow.
+//
+// It's nil-safe. DEFAULT_TBINARY_STRICT_WRITE will be returned if either tc or
+// tc.TBinaryStrictWrite is nil.
+func (tc *TConfiguration) GetTBinaryStrictWrite() bool {
+	if tc == nil || tc.TBinaryStrictWrite == nil {
+		return DEFAULT_TBINARY_STRICT_WRITE
+	}
+	return *tc.TBinaryStrictWrite
+}
+
+// GetTHeaderProtocolID returns the THeaderProtocolID should be used by
+// THeaderProtocol clients (for servers, they always use the same one as the
+// client instead).
+//
+// It's nil-safe. If either tc or tc.THeaderProtocolID is nil,
+// THeaderProtocolDefault will be returned instead.
+// THeaderProtocolDefault will also be returned if configured value is invalid.
+func (tc *TConfiguration) GetTHeaderProtocolID() THeaderProtocolID {
+	if tc == nil || tc.THeaderProtocolID == nil {
+		return THeaderProtocolDefault
+	}
+	protoID := *tc.THeaderProtocolID
+	if err := protoID.Validate(); err != nil {
+		return THeaderProtocolDefault
+	}
+	return protoID
+}
+
+// THeaderProtocolIDPtr validates and returns the pointer to id.
+//
+// If id is not a valid THeaderProtocolID, a pointer to THeaderProtocolDefault
+// and the validation error will be returned.
+func THeaderProtocolIDPtr(id THeaderProtocolID) (*THeaderProtocolID, error) {
+	err := id.Validate()
+	if err != nil {
+		id = THeaderProtocolDefault
+	}
+	return &id, err
+}
+
+// THeaderProtocolIDPtrMust validates and returns the pointer to id.
+//
+// It's similar to THeaderProtocolIDPtr, but it panics on validation errors
+// instead of returning them.
+func THeaderProtocolIDPtrMust(id THeaderProtocolID) *THeaderProtocolID {
+	ptr, err := THeaderProtocolIDPtr(id)
+	if err != nil {
+		panic(err)
+	}
+	return ptr
+}
+
+// TConfigurationSetter is an optional interface TProtocol, TTransport,
+// TProtocolFactory, TTransportFactory, and other implementations can implement.
+//
+// It's intended to be called during intializations.
+// The behavior of calling SetTConfiguration on a TTransport/TProtocol in the
+// middle of a message is undefined:
+// It may or may not change the behavior of the current processing message,
+// and it may even cause the current message to fail.
+//
+// Note for implementations: SetTConfiguration might be called multiple times
+// with the same value in quick successions due to the implementation of the
+// propagation. Implementations should make SetTConfiguration as simple as
+// possible (usually just overwrite the stored configuration and propagate it to
+// the wrapped TTransports/TProtocols).
+type TConfigurationSetter interface {
+	SetTConfiguration(*TConfiguration)
+}
+
+// PropagateTConfiguration propagates cfg to impl if impl implements
+// TConfigurationSetter and cfg is non-nil, otherwise it does nothing.
+//
+// NOTE: nil cfg is not propagated. If you want to propagate a TConfiguration
+// with everything being default value, use &TConfiguration{} explicitly instead.
+func PropagateTConfiguration(impl interface{}, cfg *TConfiguration) {
+	if cfg == nil || cfg.noPropagation {
+		return
+	}
+
+	if setter, ok := impl.(TConfigurationSetter); ok {
+		setter.SetTConfiguration(cfg)
+	}
+}
+
+func checkSizeForProtocol(size int32, cfg *TConfiguration) error {
+	if size < 0 {
+		return NewTProtocolExceptionWithType(
+			NEGATIVE_SIZE,
+			fmt.Errorf("negative size: %d", size),
+		)
+	}
+	if size > cfg.GetMaxMessageSize() {
+		return NewTProtocolExceptionWithType(
+			SIZE_LIMIT,
+			fmt.Errorf("size exceeded max allowed: %d", size),
+		)
+	}
+	return nil
+}
+
+type tTransportFactoryConf struct {
+	delegate TTransportFactory
+	cfg      *TConfiguration
+}
+
+func (f *tTransportFactoryConf) GetTransport(orig TTransport) (TTransport, error) {
+	trans, err := f.delegate.GetTransport(orig)
+	if err == nil {
+		PropagateTConfiguration(orig, f.cfg)
+		PropagateTConfiguration(trans, f.cfg)
+	}
+	return trans, err
+}
+
+func (f *tTransportFactoryConf) SetTConfiguration(cfg *TConfiguration) {
+	PropagateTConfiguration(f.delegate, f.cfg)
+	f.cfg = cfg
+}
+
+// TTransportFactoryConf wraps a TTransportFactory to propagate
+// TConfiguration on the factory's GetTransport calls.
+func TTransportFactoryConf(delegate TTransportFactory, conf *TConfiguration) TTransportFactory {
+	return &tTransportFactoryConf{
+		delegate: delegate,
+		cfg:      conf,
+	}
+}
+
+type tProtocolFactoryConf struct {
+	delegate TProtocolFactory
+	cfg      *TConfiguration
+}
+
+func (f *tProtocolFactoryConf) GetProtocol(trans TTransport) TProtocol {
+	proto := f.delegate.GetProtocol(trans)
+	PropagateTConfiguration(trans, f.cfg)
+	PropagateTConfiguration(proto, f.cfg)
+	return proto
+}
+
+func (f *tProtocolFactoryConf) SetTConfiguration(cfg *TConfiguration) {
+	PropagateTConfiguration(f.delegate, f.cfg)
+	f.cfg = cfg
+}
+
+// TProtocolFactoryConf wraps a TProtocolFactory to propagate
+// TConfiguration on the factory's GetProtocol calls.
+func TProtocolFactoryConf(delegate TProtocolFactory, conf *TConfiguration) TProtocolFactory {
+	return &tProtocolFactoryConf{
+		delegate: delegate,
+		cfg:      conf,
+	}
+}
+
+var (
+	_ TConfigurationSetter = (*tTransportFactoryConf)(nil)
+	_ TConfigurationSetter = (*tProtocolFactoryConf)(nil)
+)
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/context.go b/vendor/github.com/uber/jaeger-client-go/thrift/context.go
new file mode 100644
index 0000000..d15c1bc
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/context.go
@@ -0,0 +1,24 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import "context"
+
+var defaultCtx = context.Background()
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/exception.go b/vendor/github.com/uber/jaeger-client-go/thrift/exception.go
new file mode 100644
index 0000000..53bf862
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/exception.go
@@ -0,0 +1,116 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+)
+
+// Generic Thrift exception
+type TException interface {
+	error
+
+	TExceptionType() TExceptionType
+}
+
+// Prepends additional information to an error without losing the Thrift exception interface
+func PrependError(prepend string, err error) error {
+	msg := prepend + err.Error()
+
+	var te TException
+	if errors.As(err, &te) {
+		switch te.TExceptionType() {
+		case TExceptionTypeTransport:
+			if t, ok := err.(TTransportException); ok {
+				return prependTTransportException(prepend, t)
+			}
+		case TExceptionTypeProtocol:
+			if t, ok := err.(TProtocolException); ok {
+				return prependTProtocolException(prepend, t)
+			}
+		case TExceptionTypeApplication:
+			var t TApplicationException
+			if errors.As(err, &t) {
+				return NewTApplicationException(t.TypeId(), msg)
+			}
+		}
+
+		return wrappedTException{
+			err:            err,
+			msg:            msg,
+			tExceptionType: te.TExceptionType(),
+		}
+	}
+
+	return errors.New(msg)
+}
+
+// TExceptionType is an enum type to categorize different "subclasses" of TExceptions.
+type TExceptionType byte
+
+// TExceptionType values
+const (
+	TExceptionTypeUnknown     TExceptionType = iota
+	TExceptionTypeCompiled                   // TExceptions defined in thrift files and generated by thrift compiler
+	TExceptionTypeApplication                // TApplicationExceptions
+	TExceptionTypeProtocol                   // TProtocolExceptions
+	TExceptionTypeTransport                  // TTransportExceptions
+)
+
+// WrapTException wraps an error into TException.
+//
+// If err is nil or already TException, it's returned as-is.
+// Otherwise it will be wraped into TException with TExceptionType() returning
+// TExceptionTypeUnknown, and Unwrap() returning the original error.
+func WrapTException(err error) TException {
+	if err == nil {
+		return nil
+	}
+
+	if te, ok := err.(TException); ok {
+		return te
+	}
+
+	return wrappedTException{
+		err:            err,
+		msg:            err.Error(),
+		tExceptionType: TExceptionTypeUnknown,
+	}
+}
+
+type wrappedTException struct {
+	err            error
+	msg            string
+	tExceptionType TExceptionType
+}
+
+func (w wrappedTException) Error() string {
+	return w.msg
+}
+
+func (w wrappedTException) TExceptionType() TExceptionType {
+	return w.tExceptionType
+}
+
+func (w wrappedTException) Unwrap() error {
+	return w.err
+}
+
+var _ TException = wrappedTException{}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/header_context.go b/vendor/github.com/uber/jaeger-client-go/thrift/header_context.go
new file mode 100644
index 0000000..ac9bd48
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/header_context.go
@@ -0,0 +1,110 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+)
+
+// See https://godoc.org/context#WithValue on why do we need the unexported typedefs.
+type (
+	headerKey     string
+	headerKeyList int
+)
+
+// Values for headerKeyList.
+const (
+	headerKeyListRead headerKeyList = iota
+	headerKeyListWrite
+)
+
+// SetHeader sets a header in the context.
+func SetHeader(ctx context.Context, key, value string) context.Context {
+	return context.WithValue(
+		ctx,
+		headerKey(key),
+		value,
+	)
+}
+
+// UnsetHeader unsets a previously set header in the context.
+func UnsetHeader(ctx context.Context, key string) context.Context {
+	return context.WithValue(
+		ctx,
+		headerKey(key),
+		nil,
+	)
+}
+
+// GetHeader returns a value of the given header from the context.
+func GetHeader(ctx context.Context, key string) (value string, ok bool) {
+	if v := ctx.Value(headerKey(key)); v != nil {
+		value, ok = v.(string)
+	}
+	return
+}
+
+// SetReadHeaderList sets the key list of read THeaders in the context.
+func SetReadHeaderList(ctx context.Context, keys []string) context.Context {
+	return context.WithValue(
+		ctx,
+		headerKeyListRead,
+		keys,
+	)
+}
+
+// GetReadHeaderList returns the key list of read THeaders from the context.
+func GetReadHeaderList(ctx context.Context) []string {
+	if v := ctx.Value(headerKeyListRead); v != nil {
+		if value, ok := v.([]string); ok {
+			return value
+		}
+	}
+	return nil
+}
+
+// SetWriteHeaderList sets the key list of THeaders to write in the context.
+func SetWriteHeaderList(ctx context.Context, keys []string) context.Context {
+	return context.WithValue(
+		ctx,
+		headerKeyListWrite,
+		keys,
+	)
+}
+
+// GetWriteHeaderList returns the key list of THeaders to write from the context.
+func GetWriteHeaderList(ctx context.Context) []string {
+	if v := ctx.Value(headerKeyListWrite); v != nil {
+		if value, ok := v.([]string); ok {
+			return value
+		}
+	}
+	return nil
+}
+
+// AddReadTHeaderToContext adds the whole THeader headers into context.
+func AddReadTHeaderToContext(ctx context.Context, headers THeaderMap) context.Context {
+	keys := make([]string, 0, len(headers))
+	for key, value := range headers {
+		ctx = SetHeader(ctx, key, value)
+		keys = append(keys, key)
+	}
+	return SetReadHeaderList(ctx, keys)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/header_protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/header_protocol.go
new file mode 100644
index 0000000..878041f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/header_protocol.go
@@ -0,0 +1,351 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"errors"
+)
+
+// THeaderProtocol is a thrift protocol that implements THeader:
+// https://github.com/apache/thrift/blob/master/doc/specs/HeaderFormat.md
+//
+// It supports either binary or compact protocol as the wrapped protocol.
+//
+// Most of the THeader handlings are happening inside THeaderTransport.
+type THeaderProtocol struct {
+	transport *THeaderTransport
+
+	// Will be initialized on first read/write.
+	protocol TProtocol
+
+	cfg *TConfiguration
+}
+
+// Deprecated: Use NewTHeaderProtocolConf instead.
+func NewTHeaderProtocol(trans TTransport) *THeaderProtocol {
+	return newTHeaderProtocolConf(trans, &TConfiguration{
+		noPropagation: true,
+	})
+}
+
+// NewTHeaderProtocolConf creates a new THeaderProtocol from the underlying
+// transport with given TConfiguration.
+//
+// The passed in transport will be wrapped with THeaderTransport.
+//
+// Note that THeaderTransport handles frame and zlib by itself,
+// so the underlying transport should be a raw socket transports (TSocket or TSSLSocket),
+// instead of rich transports like TZlibTransport or TFramedTransport.
+func NewTHeaderProtocolConf(trans TTransport, conf *TConfiguration) *THeaderProtocol {
+	return newTHeaderProtocolConf(trans, conf)
+}
+
+func newTHeaderProtocolConf(trans TTransport, cfg *TConfiguration) *THeaderProtocol {
+	t := NewTHeaderTransportConf(trans, cfg)
+	p, _ := t.cfg.GetTHeaderProtocolID().GetProtocol(t)
+	PropagateTConfiguration(p, cfg)
+	return &THeaderProtocol{
+		transport: t,
+		protocol:  p,
+		cfg:       cfg,
+	}
+}
+
+type tHeaderProtocolFactory struct {
+	cfg *TConfiguration
+}
+
+func (f tHeaderProtocolFactory) GetProtocol(trans TTransport) TProtocol {
+	return newTHeaderProtocolConf(trans, f.cfg)
+}
+
+func (f *tHeaderProtocolFactory) SetTConfiguration(cfg *TConfiguration) {
+	f.cfg = cfg
+}
+
+// Deprecated: Use NewTHeaderProtocolFactoryConf instead.
+func NewTHeaderProtocolFactory() TProtocolFactory {
+	return NewTHeaderProtocolFactoryConf(&TConfiguration{
+		noPropagation: true,
+	})
+}
+
+// NewTHeaderProtocolFactoryConf creates a factory for THeader with given
+// TConfiguration.
+func NewTHeaderProtocolFactoryConf(conf *TConfiguration) TProtocolFactory {
+	return tHeaderProtocolFactory{
+		cfg: conf,
+	}
+}
+
+// Transport returns the underlying transport.
+//
+// It's guaranteed to be of type *THeaderTransport.
+func (p *THeaderProtocol) Transport() TTransport {
+	return p.transport
+}
+
+// GetReadHeaders returns the THeaderMap read from transport.
+func (p *THeaderProtocol) GetReadHeaders() THeaderMap {
+	return p.transport.GetReadHeaders()
+}
+
+// SetWriteHeader sets a header for write.
+func (p *THeaderProtocol) SetWriteHeader(key, value string) {
+	p.transport.SetWriteHeader(key, value)
+}
+
+// ClearWriteHeaders clears all write headers previously set.
+func (p *THeaderProtocol) ClearWriteHeaders() {
+	p.transport.ClearWriteHeaders()
+}
+
+// AddTransform add a transform for writing.
+func (p *THeaderProtocol) AddTransform(transform THeaderTransformID) error {
+	return p.transport.AddTransform(transform)
+}
+
+func (p *THeaderProtocol) Flush(ctx context.Context) error {
+	return p.transport.Flush(ctx)
+}
+
+func (p *THeaderProtocol) WriteMessageBegin(ctx context.Context, name string, typeID TMessageType, seqID int32) error {
+	newProto, err := p.transport.Protocol().GetProtocol(p.transport)
+	if err != nil {
+		return err
+	}
+	PropagateTConfiguration(newProto, p.cfg)
+	p.protocol = newProto
+	p.transport.SequenceID = seqID
+	return p.protocol.WriteMessageBegin(ctx, name, typeID, seqID)
+}
+
+func (p *THeaderProtocol) WriteMessageEnd(ctx context.Context) error {
+	if err := p.protocol.WriteMessageEnd(ctx); err != nil {
+		return err
+	}
+	return p.transport.Flush(ctx)
+}
+
+func (p *THeaderProtocol) WriteStructBegin(ctx context.Context, name string) error {
+	return p.protocol.WriteStructBegin(ctx, name)
+}
+
+func (p *THeaderProtocol) WriteStructEnd(ctx context.Context) error {
+	return p.protocol.WriteStructEnd(ctx)
+}
+
+func (p *THeaderProtocol) WriteFieldBegin(ctx context.Context, name string, typeID TType, id int16) error {
+	return p.protocol.WriteFieldBegin(ctx, name, typeID, id)
+}
+
+func (p *THeaderProtocol) WriteFieldEnd(ctx context.Context) error {
+	return p.protocol.WriteFieldEnd(ctx)
+}
+
+func (p *THeaderProtocol) WriteFieldStop(ctx context.Context) error {
+	return p.protocol.WriteFieldStop(ctx)
+}
+
+func (p *THeaderProtocol) WriteMapBegin(ctx context.Context, keyType TType, valueType TType, size int) error {
+	return p.protocol.WriteMapBegin(ctx, keyType, valueType, size)
+}
+
+func (p *THeaderProtocol) WriteMapEnd(ctx context.Context) error {
+	return p.protocol.WriteMapEnd(ctx)
+}
+
+func (p *THeaderProtocol) WriteListBegin(ctx context.Context, elemType TType, size int) error {
+	return p.protocol.WriteListBegin(ctx, elemType, size)
+}
+
+func (p *THeaderProtocol) WriteListEnd(ctx context.Context) error {
+	return p.protocol.WriteListEnd(ctx)
+}
+
+func (p *THeaderProtocol) WriteSetBegin(ctx context.Context, elemType TType, size int) error {
+	return p.protocol.WriteSetBegin(ctx, elemType, size)
+}
+
+func (p *THeaderProtocol) WriteSetEnd(ctx context.Context) error {
+	return p.protocol.WriteSetEnd(ctx)
+}
+
+func (p *THeaderProtocol) WriteBool(ctx context.Context, value bool) error {
+	return p.protocol.WriteBool(ctx, value)
+}
+
+func (p *THeaderProtocol) WriteByte(ctx context.Context, value int8) error {
+	return p.protocol.WriteByte(ctx, value)
+}
+
+func (p *THeaderProtocol) WriteI16(ctx context.Context, value int16) error {
+	return p.protocol.WriteI16(ctx, value)
+}
+
+func (p *THeaderProtocol) WriteI32(ctx context.Context, value int32) error {
+	return p.protocol.WriteI32(ctx, value)
+}
+
+func (p *THeaderProtocol) WriteI64(ctx context.Context, value int64) error {
+	return p.protocol.WriteI64(ctx, value)
+}
+
+func (p *THeaderProtocol) WriteDouble(ctx context.Context, value float64) error {
+	return p.protocol.WriteDouble(ctx, value)
+}
+
+func (p *THeaderProtocol) WriteString(ctx context.Context, value string) error {
+	return p.protocol.WriteString(ctx, value)
+}
+
+func (p *THeaderProtocol) WriteBinary(ctx context.Context, value []byte) error {
+	return p.protocol.WriteBinary(ctx, value)
+}
+
+// ReadFrame calls underlying THeaderTransport's ReadFrame function.
+func (p *THeaderProtocol) ReadFrame(ctx context.Context) error {
+	return p.transport.ReadFrame(ctx)
+}
+
+func (p *THeaderProtocol) ReadMessageBegin(ctx context.Context) (name string, typeID TMessageType, seqID int32, err error) {
+	if err = p.transport.ReadFrame(ctx); err != nil {
+		return
+	}
+
+	var newProto TProtocol
+	newProto, err = p.transport.Protocol().GetProtocol(p.transport)
+	if err != nil {
+		var tAppExc TApplicationException
+		if !errors.As(err, &tAppExc) {
+			return
+		}
+		if e := p.protocol.WriteMessageBegin(ctx, "", EXCEPTION, seqID); e != nil {
+			return
+		}
+		if e := tAppExc.Write(ctx, p.protocol); e != nil {
+			return
+		}
+		if e := p.protocol.WriteMessageEnd(ctx); e != nil {
+			return
+		}
+		if e := p.transport.Flush(ctx); e != nil {
+			return
+		}
+		return
+	}
+	PropagateTConfiguration(newProto, p.cfg)
+	p.protocol = newProto
+
+	return p.protocol.ReadMessageBegin(ctx)
+}
+
+func (p *THeaderProtocol) ReadMessageEnd(ctx context.Context) error {
+	return p.protocol.ReadMessageEnd(ctx)
+}
+
+func (p *THeaderProtocol) ReadStructBegin(ctx context.Context) (name string, err error) {
+	return p.protocol.ReadStructBegin(ctx)
+}
+
+func (p *THeaderProtocol) ReadStructEnd(ctx context.Context) error {
+	return p.protocol.ReadStructEnd(ctx)
+}
+
+func (p *THeaderProtocol) ReadFieldBegin(ctx context.Context) (name string, typeID TType, id int16, err error) {
+	return p.protocol.ReadFieldBegin(ctx)
+}
+
+func (p *THeaderProtocol) ReadFieldEnd(ctx context.Context) error {
+	return p.protocol.ReadFieldEnd(ctx)
+}
+
+func (p *THeaderProtocol) ReadMapBegin(ctx context.Context) (keyType TType, valueType TType, size int, err error) {
+	return p.protocol.ReadMapBegin(ctx)
+}
+
+func (p *THeaderProtocol) ReadMapEnd(ctx context.Context) error {
+	return p.protocol.ReadMapEnd(ctx)
+}
+
+func (p *THeaderProtocol) ReadListBegin(ctx context.Context) (elemType TType, size int, err error) {
+	return p.protocol.ReadListBegin(ctx)
+}
+
+func (p *THeaderProtocol) ReadListEnd(ctx context.Context) error {
+	return p.protocol.ReadListEnd(ctx)
+}
+
+func (p *THeaderProtocol) ReadSetBegin(ctx context.Context) (elemType TType, size int, err error) {
+	return p.protocol.ReadSetBegin(ctx)
+}
+
+func (p *THeaderProtocol) ReadSetEnd(ctx context.Context) error {
+	return p.protocol.ReadSetEnd(ctx)
+}
+
+func (p *THeaderProtocol) ReadBool(ctx context.Context) (value bool, err error) {
+	return p.protocol.ReadBool(ctx)
+}
+
+func (p *THeaderProtocol) ReadByte(ctx context.Context) (value int8, err error) {
+	return p.protocol.ReadByte(ctx)
+}
+
+func (p *THeaderProtocol) ReadI16(ctx context.Context) (value int16, err error) {
+	return p.protocol.ReadI16(ctx)
+}
+
+func (p *THeaderProtocol) ReadI32(ctx context.Context) (value int32, err error) {
+	return p.protocol.ReadI32(ctx)
+}
+
+func (p *THeaderProtocol) ReadI64(ctx context.Context) (value int64, err error) {
+	return p.protocol.ReadI64(ctx)
+}
+
+func (p *THeaderProtocol) ReadDouble(ctx context.Context) (value float64, err error) {
+	return p.protocol.ReadDouble(ctx)
+}
+
+func (p *THeaderProtocol) ReadString(ctx context.Context) (value string, err error) {
+	return p.protocol.ReadString(ctx)
+}
+
+func (p *THeaderProtocol) ReadBinary(ctx context.Context) (value []byte, err error) {
+	return p.protocol.ReadBinary(ctx)
+}
+
+func (p *THeaderProtocol) Skip(ctx context.Context, fieldType TType) error {
+	return p.protocol.Skip(ctx, fieldType)
+}
+
+// SetTConfiguration implements TConfigurationSetter.
+func (p *THeaderProtocol) SetTConfiguration(cfg *TConfiguration) {
+	PropagateTConfiguration(p.transport, cfg)
+	PropagateTConfiguration(p.protocol, cfg)
+	p.cfg = cfg
+}
+
+var (
+	_ TConfigurationSetter = (*tHeaderProtocolFactory)(nil)
+	_ TConfigurationSetter = (*THeaderProtocol)(nil)
+)
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/header_transport.go b/vendor/github.com/uber/jaeger-client-go/thrift/header_transport.go
new file mode 100644
index 0000000..f5736df
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/header_transport.go
@@ -0,0 +1,810 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bufio"
+	"bytes"
+	"compress/zlib"
+	"context"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+)
+
+// Size in bytes for 32-bit ints.
+const size32 = 4
+
+type headerMeta struct {
+	MagicFlags   uint32
+	SequenceID   int32
+	HeaderLength uint16
+}
+
+const headerMetaSize = 10
+
+type clientType int
+
+const (
+	clientUnknown clientType = iota
+	clientHeaders
+	clientFramedBinary
+	clientUnframedBinary
+	clientFramedCompact
+	clientUnframedCompact
+)
+
+// Constants defined in THeader format:
+// https://github.com/apache/thrift/blob/master/doc/specs/HeaderFormat.md
+const (
+	THeaderHeaderMagic  uint32 = 0x0fff0000
+	THeaderHeaderMask   uint32 = 0xffff0000
+	THeaderFlagsMask    uint32 = 0x0000ffff
+	THeaderMaxFrameSize uint32 = 0x3fffffff
+)
+
+// THeaderMap is the type of the header map in THeader transport.
+type THeaderMap map[string]string
+
+// THeaderProtocolID is the wrapped protocol id used in THeader.
+type THeaderProtocolID int32
+
+// Supported THeaderProtocolID values.
+const (
+	THeaderProtocolBinary  THeaderProtocolID = 0x00
+	THeaderProtocolCompact THeaderProtocolID = 0x02
+	THeaderProtocolDefault                   = THeaderProtocolBinary
+)
+
+// Declared globally to avoid repetitive allocations, not really used.
+var globalMemoryBuffer = NewTMemoryBuffer()
+
+// Validate checks whether the THeaderProtocolID is a valid/supported one.
+func (id THeaderProtocolID) Validate() error {
+	_, err := id.GetProtocol(globalMemoryBuffer)
+	return err
+}
+
+// GetProtocol gets the corresponding TProtocol from the wrapped protocol id.
+func (id THeaderProtocolID) GetProtocol(trans TTransport) (TProtocol, error) {
+	switch id {
+	default:
+		return nil, NewTApplicationException(
+			INVALID_PROTOCOL,
+			fmt.Sprintf("THeader protocol id %d not supported", id),
+		)
+	case THeaderProtocolBinary:
+		return NewTBinaryProtocolTransport(trans), nil
+	case THeaderProtocolCompact:
+		return NewTCompactProtocol(trans), nil
+	}
+}
+
+// THeaderTransformID defines the numeric id of the transform used.
+type THeaderTransformID int32
+
+// THeaderTransformID values.
+//
+// Values not defined here are not currently supported, namely HMAC and Snappy.
+const (
+	TransformNone THeaderTransformID = iota // 0, no special handling
+	TransformZlib                           // 1, zlib
+)
+
+var supportedTransformIDs = map[THeaderTransformID]bool{
+	TransformNone: true,
+	TransformZlib: true,
+}
+
+// TransformReader is an io.ReadCloser that handles transforms reading.
+type TransformReader struct {
+	io.Reader
+
+	closers []io.Closer
+}
+
+var _ io.ReadCloser = (*TransformReader)(nil)
+
+// NewTransformReaderWithCapacity initializes a TransformReader with expected
+// closers capacity.
+//
+// If you don't know the closers capacity beforehand, just use
+//
+//     &TransformReader{Reader: baseReader}
+//
+// instead would be sufficient.
+func NewTransformReaderWithCapacity(baseReader io.Reader, capacity int) *TransformReader {
+	return &TransformReader{
+		Reader:  baseReader,
+		closers: make([]io.Closer, 0, capacity),
+	}
+}
+
+// Close calls the underlying closers in appropriate order,
+// stops at and returns the first error encountered.
+func (tr *TransformReader) Close() error {
+	// Call closers in reversed order
+	for i := len(tr.closers) - 1; i >= 0; i-- {
+		if err := tr.closers[i].Close(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// AddTransform adds a transform.
+func (tr *TransformReader) AddTransform(id THeaderTransformID) error {
+	switch id {
+	default:
+		return NewTApplicationException(
+			INVALID_TRANSFORM,
+			fmt.Sprintf("THeaderTransformID %d not supported", id),
+		)
+	case TransformNone:
+		// no-op
+	case TransformZlib:
+		readCloser, err := zlib.NewReader(tr.Reader)
+		if err != nil {
+			return err
+		}
+		tr.Reader = readCloser
+		tr.closers = append(tr.closers, readCloser)
+	}
+	return nil
+}
+
+// TransformWriter is an io.WriteCloser that handles transforms writing.
+type TransformWriter struct {
+	io.Writer
+
+	closers []io.Closer
+}
+
+var _ io.WriteCloser = (*TransformWriter)(nil)
+
+// NewTransformWriter creates a new TransformWriter with base writer and transforms.
+func NewTransformWriter(baseWriter io.Writer, transforms []THeaderTransformID) (io.WriteCloser, error) {
+	writer := &TransformWriter{
+		Writer:  baseWriter,
+		closers: make([]io.Closer, 0, len(transforms)),
+	}
+	for _, id := range transforms {
+		if err := writer.AddTransform(id); err != nil {
+			return nil, err
+		}
+	}
+	return writer, nil
+}
+
+// Close calls the underlying closers in appropriate order,
+// stops at and returns the first error encountered.
+func (tw *TransformWriter) Close() error {
+	// Call closers in reversed order
+	for i := len(tw.closers) - 1; i >= 0; i-- {
+		if err := tw.closers[i].Close(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// AddTransform adds a transform.
+func (tw *TransformWriter) AddTransform(id THeaderTransformID) error {
+	switch id {
+	default:
+		return NewTApplicationException(
+			INVALID_TRANSFORM,
+			fmt.Sprintf("THeaderTransformID %d not supported", id),
+		)
+	case TransformNone:
+		// no-op
+	case TransformZlib:
+		writeCloser := zlib.NewWriter(tw.Writer)
+		tw.Writer = writeCloser
+		tw.closers = append(tw.closers, writeCloser)
+	}
+	return nil
+}
+
+// THeaderInfoType is the type id of the info headers.
+type THeaderInfoType int32
+
+// Supported THeaderInfoType values.
+const (
+	_            THeaderInfoType = iota // Skip 0
+	InfoKeyValue                        // 1
+	// Rest of the info types are not supported.
+)
+
+// THeaderTransport is a Transport mode that implements THeader.
+//
+// Note that THeaderTransport handles frame and zlib by itself,
+// so the underlying transport should be a raw socket transports (TSocket or TSSLSocket),
+// instead of rich transports like TZlibTransport or TFramedTransport.
+type THeaderTransport struct {
+	SequenceID int32
+	Flags      uint32
+
+	transport TTransport
+
+	// THeaderMap for read and write
+	readHeaders  THeaderMap
+	writeHeaders THeaderMap
+
+	// Reading related variables.
+	reader *bufio.Reader
+	// When frame is detected, we read the frame fully into frameBuffer.
+	frameBuffer bytes.Buffer
+	// When it's non-nil, Read should read from frameReader instead of
+	// reader, and EOF error indicates end of frame instead of end of all
+	// transport.
+	frameReader io.ReadCloser
+
+	// Writing related variables
+	writeBuffer     bytes.Buffer
+	writeTransforms []THeaderTransformID
+
+	clientType clientType
+	protocolID THeaderProtocolID
+	cfg        *TConfiguration
+
+	// buffer is used in the following scenarios to avoid repetitive
+	// allocations, while 4 is big enough for all those scenarios:
+	//
+	// * header padding (max size 4)
+	// * write the frame size (size 4)
+	buffer [4]byte
+}
+
+var _ TTransport = (*THeaderTransport)(nil)
+
+// Deprecated: Use NewTHeaderTransportConf instead.
+func NewTHeaderTransport(trans TTransport) *THeaderTransport {
+	return NewTHeaderTransportConf(trans, &TConfiguration{
+		noPropagation: true,
+	})
+}
+
+// NewTHeaderTransportConf creates THeaderTransport from the
+// underlying transport, with given TConfiguration attached.
+//
+// If trans is already a *THeaderTransport, it will be returned as is,
+// but with TConfiguration overridden by the value passed in.
+//
+// The protocol ID in TConfiguration is only useful for client transports.
+// For servers,
+// the protocol ID will be overridden again to the one set by the client,
+// to ensure that servers always speak the same dialect as the client.
+func NewTHeaderTransportConf(trans TTransport, conf *TConfiguration) *THeaderTransport {
+	if ht, ok := trans.(*THeaderTransport); ok {
+		ht.SetTConfiguration(conf)
+		return ht
+	}
+	PropagateTConfiguration(trans, conf)
+	return &THeaderTransport{
+		transport:    trans,
+		reader:       bufio.NewReader(trans),
+		writeHeaders: make(THeaderMap),
+		protocolID:   conf.GetTHeaderProtocolID(),
+		cfg:          conf,
+	}
+}
+
+// Open calls the underlying transport's Open function.
+func (t *THeaderTransport) Open() error {
+	return t.transport.Open()
+}
+
+// IsOpen calls the underlying transport's IsOpen function.
+func (t *THeaderTransport) IsOpen() bool {
+	return t.transport.IsOpen()
+}
+
+// ReadFrame tries to read the frame header, guess the client type, and handle
+// unframed clients.
+func (t *THeaderTransport) ReadFrame(ctx context.Context) error {
+	if !t.needReadFrame() {
+		// No need to read frame, skipping.
+		return nil
+	}
+
+	// Peek and handle the first 32 bits.
+	// They could either be the length field of a framed message,
+	// or the first bytes of an unframed message.
+	var buf []byte
+	var err error
+	// This is also usually the first read from a connection,
+	// so handle retries around socket timeouts.
+	_, deadlineSet := ctx.Deadline()
+	for {
+		buf, err = t.reader.Peek(size32)
+		if deadlineSet && isTimeoutError(err) && ctx.Err() == nil {
+			// This is I/O timeout and we still have time,
+			// continue trying
+			continue
+		}
+		// For anything else, do not retry
+		break
+	}
+	if err != nil {
+		return err
+	}
+
+	frameSize := binary.BigEndian.Uint32(buf)
+	if frameSize&VERSION_MASK == VERSION_1 {
+		t.clientType = clientUnframedBinary
+		return nil
+	}
+	if buf[0] == COMPACT_PROTOCOL_ID && buf[1]&COMPACT_VERSION_MASK == COMPACT_VERSION {
+		t.clientType = clientUnframedCompact
+		return nil
+	}
+
+	// At this point it should be a framed message,
+	// sanity check on frameSize then discard the peeked part.
+	if frameSize > THeaderMaxFrameSize || frameSize > uint32(t.cfg.GetMaxFrameSize()) {
+		return NewTProtocolExceptionWithType(
+			SIZE_LIMIT,
+			errors.New("frame too large"),
+		)
+	}
+	t.reader.Discard(size32)
+
+	// Read the frame fully into frameBuffer.
+	_, err = io.CopyN(&t.frameBuffer, t.reader, int64(frameSize))
+	if err != nil {
+		return err
+	}
+	t.frameReader = ioutil.NopCloser(&t.frameBuffer)
+
+	// Peek and handle the next 32 bits.
+	buf = t.frameBuffer.Bytes()[:size32]
+	version := binary.BigEndian.Uint32(buf)
+	if version&THeaderHeaderMask == THeaderHeaderMagic {
+		t.clientType = clientHeaders
+		return t.parseHeaders(ctx, frameSize)
+	}
+	if version&VERSION_MASK == VERSION_1 {
+		t.clientType = clientFramedBinary
+		return nil
+	}
+	if buf[0] == COMPACT_PROTOCOL_ID && buf[1]&COMPACT_VERSION_MASK == COMPACT_VERSION {
+		t.clientType = clientFramedCompact
+		return nil
+	}
+	if err := t.endOfFrame(); err != nil {
+		return err
+	}
+	return NewTProtocolExceptionWithType(
+		NOT_IMPLEMENTED,
+		errors.New("unsupported client transport type"),
+	)
+}
+
+// endOfFrame does end of frame handling.
+//
+// It closes frameReader, and also resets frame related states.
+func (t *THeaderTransport) endOfFrame() error {
+	defer func() {
+		t.frameBuffer.Reset()
+		t.frameReader = nil
+	}()
+	return t.frameReader.Close()
+}
+
+func (t *THeaderTransport) parseHeaders(ctx context.Context, frameSize uint32) error {
+	if t.clientType != clientHeaders {
+		return nil
+	}
+
+	var err error
+	var meta headerMeta
+	if err = binary.Read(&t.frameBuffer, binary.BigEndian, &meta); err != nil {
+		return err
+	}
+	frameSize -= headerMetaSize
+	t.Flags = meta.MagicFlags & THeaderFlagsMask
+	t.SequenceID = meta.SequenceID
+	headerLength := int64(meta.HeaderLength) * 4
+	if int64(frameSize) < headerLength {
+		return NewTProtocolExceptionWithType(
+			SIZE_LIMIT,
+			errors.New("header size is larger than the whole frame"),
+		)
+	}
+	headerBuf := NewTMemoryBuffer()
+	_, err = io.CopyN(headerBuf, &t.frameBuffer, headerLength)
+	if err != nil {
+		return err
+	}
+	hp := NewTCompactProtocol(headerBuf)
+	hp.SetTConfiguration(t.cfg)
+
+	// At this point the header is already read into headerBuf,
+	// and t.frameBuffer starts from the actual payload.
+	protoID, err := hp.readVarint32()
+	if err != nil {
+		return err
+	}
+	t.protocolID = THeaderProtocolID(protoID)
+
+	var transformCount int32
+	transformCount, err = hp.readVarint32()
+	if err != nil {
+		return err
+	}
+	if transformCount > 0 {
+		reader := NewTransformReaderWithCapacity(
+			&t.frameBuffer,
+			int(transformCount),
+		)
+		t.frameReader = reader
+		transformIDs := make([]THeaderTransformID, transformCount)
+		for i := 0; i < int(transformCount); i++ {
+			id, err := hp.readVarint32()
+			if err != nil {
+				return err
+			}
+			transformIDs[i] = THeaderTransformID(id)
+		}
+		// The transform IDs on the wire was added based on the order of
+		// writing, so on the reading side we need to reverse the order.
+		for i := transformCount - 1; i >= 0; i-- {
+			id := transformIDs[i]
+			if err := reader.AddTransform(id); err != nil {
+				return err
+			}
+		}
+	}
+
+	// The info part does not use the transforms yet, so it's
+	// important to continue using headerBuf.
+	headers := make(THeaderMap)
+	for {
+		infoType, err := hp.readVarint32()
+		if errors.Is(err, io.EOF) {
+			break
+		}
+		if err != nil {
+			return err
+		}
+		if THeaderInfoType(infoType) == InfoKeyValue {
+			count, err := hp.readVarint32()
+			if err != nil {
+				return err
+			}
+			for i := 0; i < int(count); i++ {
+				key, err := hp.ReadString(ctx)
+				if err != nil {
+					return err
+				}
+				value, err := hp.ReadString(ctx)
+				if err != nil {
+					return err
+				}
+				headers[key] = value
+			}
+		} else {
+			// Skip reading info section on the first
+			// unsupported info type.
+			break
+		}
+	}
+	t.readHeaders = headers
+
+	return nil
+}
+
+func (t *THeaderTransport) needReadFrame() bool {
+	if t.clientType == clientUnknown {
+		// This is a new connection that's never read before.
+		return true
+	}
+	if t.isFramed() && t.frameReader == nil {
+		// We just finished the last frame.
+		return true
+	}
+	return false
+}
+
+func (t *THeaderTransport) Read(p []byte) (read int, err error) {
+	// Here using context.Background instead of a context passed in is safe.
+	// First is that there's no way to pass context into this function.
+	// Then, 99% of the case when calling this Read frame is already read
+	// into frameReader. ReadFrame here is more of preventing bugs that
+	// didn't call ReadFrame before calling Read.
+	err = t.ReadFrame(context.Background())
+	if err != nil {
+		return
+	}
+	if t.frameReader != nil {
+		read, err = t.frameReader.Read(p)
+		if err == nil && t.frameBuffer.Len() <= 0 {
+			// the last Read finished the frame, do endOfFrame
+			// handling here.
+			err = t.endOfFrame()
+		} else if err == io.EOF {
+			err = t.endOfFrame()
+			if err != nil {
+				return
+			}
+			if read == 0 {
+				// Try to read the next frame when we hit EOF
+				// (end of frame) immediately.
+				// When we got here, it means the last read
+				// finished the previous frame, but didn't
+				// do endOfFrame handling yet.
+				// We have to read the next frame here,
+				// as otherwise we would return 0 and nil,
+				// which is a case not handled well by most
+				// protocol implementations.
+				return t.Read(p)
+			}
+		}
+		return
+	}
+	return t.reader.Read(p)
+}
+
+// Write writes data to the write buffer.
+//
+// You need to call Flush to actually write them to the transport.
+func (t *THeaderTransport) Write(p []byte) (int, error) {
+	return t.writeBuffer.Write(p)
+}
+
+// Flush writes the appropriate header and the write buffer to the underlying transport.
+func (t *THeaderTransport) Flush(ctx context.Context) error {
+	if t.writeBuffer.Len() == 0 {
+		return nil
+	}
+
+	defer t.writeBuffer.Reset()
+
+	switch t.clientType {
+	default:
+		fallthrough
+	case clientUnknown:
+		t.clientType = clientHeaders
+		fallthrough
+	case clientHeaders:
+		headers := NewTMemoryBuffer()
+		hp := NewTCompactProtocol(headers)
+		hp.SetTConfiguration(t.cfg)
+		if _, err := hp.writeVarint32(int32(t.protocolID)); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+		if _, err := hp.writeVarint32(int32(len(t.writeTransforms))); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+		for _, transform := range t.writeTransforms {
+			if _, err := hp.writeVarint32(int32(transform)); err != nil {
+				return NewTTransportExceptionFromError(err)
+			}
+		}
+		if len(t.writeHeaders) > 0 {
+			if _, err := hp.writeVarint32(int32(InfoKeyValue)); err != nil {
+				return NewTTransportExceptionFromError(err)
+			}
+			if _, err := hp.writeVarint32(int32(len(t.writeHeaders))); err != nil {
+				return NewTTransportExceptionFromError(err)
+			}
+			for key, value := range t.writeHeaders {
+				if err := hp.WriteString(ctx, key); err != nil {
+					return NewTTransportExceptionFromError(err)
+				}
+				if err := hp.WriteString(ctx, value); err != nil {
+					return NewTTransportExceptionFromError(err)
+				}
+			}
+		}
+		padding := 4 - headers.Len()%4
+		if padding < 4 {
+			buf := t.buffer[:padding]
+			for i := range buf {
+				buf[i] = 0
+			}
+			if _, err := headers.Write(buf); err != nil {
+				return NewTTransportExceptionFromError(err)
+			}
+		}
+
+		var payload bytes.Buffer
+		meta := headerMeta{
+			MagicFlags:   THeaderHeaderMagic + t.Flags&THeaderFlagsMask,
+			SequenceID:   t.SequenceID,
+			HeaderLength: uint16(headers.Len() / 4),
+		}
+		if err := binary.Write(&payload, binary.BigEndian, meta); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+		if _, err := io.Copy(&payload, headers); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+
+		writer, err := NewTransformWriter(&payload, t.writeTransforms)
+		if err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+		if _, err := io.Copy(writer, &t.writeBuffer); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+		if err := writer.Close(); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+
+		// First write frame length
+		buf := t.buffer[:size32]
+		binary.BigEndian.PutUint32(buf, uint32(payload.Len()))
+		if _, err := t.transport.Write(buf); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+		// Then write the payload
+		if _, err := io.Copy(t.transport, &payload); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+
+	case clientFramedBinary, clientFramedCompact:
+		buf := t.buffer[:size32]
+		binary.BigEndian.PutUint32(buf, uint32(t.writeBuffer.Len()))
+		if _, err := t.transport.Write(buf); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+		fallthrough
+	case clientUnframedBinary, clientUnframedCompact:
+		if _, err := io.Copy(t.transport, &t.writeBuffer); err != nil {
+			return NewTTransportExceptionFromError(err)
+		}
+	}
+
+	select {
+	default:
+	case <-ctx.Done():
+		return NewTTransportExceptionFromError(ctx.Err())
+	}
+
+	return t.transport.Flush(ctx)
+}
+
+// Close closes the transport, along with its underlying transport.
+func (t *THeaderTransport) Close() error {
+	if err := t.Flush(context.Background()); err != nil {
+		return err
+	}
+	return t.transport.Close()
+}
+
+// RemainingBytes calls underlying transport's RemainingBytes.
+//
+// Even in framed cases, because of all the possible compression transforms
+// involved, the remaining frame size is likely to be different from the actual
+// remaining readable bytes, so we don't bother to keep tracking the remaining
+// frame size by ourselves and just use the underlying transport's
+// RemainingBytes directly.
+func (t *THeaderTransport) RemainingBytes() uint64 {
+	return t.transport.RemainingBytes()
+}
+
+// GetReadHeaders returns the THeaderMap read from transport.
+func (t *THeaderTransport) GetReadHeaders() THeaderMap {
+	return t.readHeaders
+}
+
+// SetWriteHeader sets a header for write.
+func (t *THeaderTransport) SetWriteHeader(key, value string) {
+	t.writeHeaders[key] = value
+}
+
+// ClearWriteHeaders clears all write headers previously set.
+func (t *THeaderTransport) ClearWriteHeaders() {
+	t.writeHeaders = make(THeaderMap)
+}
+
+// AddTransform add a transform for writing.
+func (t *THeaderTransport) AddTransform(transform THeaderTransformID) error {
+	if !supportedTransformIDs[transform] {
+		return NewTProtocolExceptionWithType(
+			NOT_IMPLEMENTED,
+			fmt.Errorf("THeaderTransformID %d not supported", transform),
+		)
+	}
+	t.writeTransforms = append(t.writeTransforms, transform)
+	return nil
+}
+
+// Protocol returns the wrapped protocol id used in this THeaderTransport.
+func (t *THeaderTransport) Protocol() THeaderProtocolID {
+	switch t.clientType {
+	default:
+		return t.protocolID
+	case clientFramedBinary, clientUnframedBinary:
+		return THeaderProtocolBinary
+	case clientFramedCompact, clientUnframedCompact:
+		return THeaderProtocolCompact
+	}
+}
+
+func (t *THeaderTransport) isFramed() bool {
+	switch t.clientType {
+	default:
+		return false
+	case clientHeaders, clientFramedBinary, clientFramedCompact:
+		return true
+	}
+}
+
+// SetTConfiguration implements TConfigurationSetter.
+func (t *THeaderTransport) SetTConfiguration(cfg *TConfiguration) {
+	PropagateTConfiguration(t.transport, cfg)
+	t.cfg = cfg
+}
+
+// THeaderTransportFactory is a TTransportFactory implementation to create
+// THeaderTransport.
+//
+// It also implements TConfigurationSetter.
+type THeaderTransportFactory struct {
+	// The underlying factory, could be nil.
+	Factory TTransportFactory
+
+	cfg *TConfiguration
+}
+
+// Deprecated: Use NewTHeaderTransportFactoryConf instead.
+func NewTHeaderTransportFactory(factory TTransportFactory) TTransportFactory {
+	return NewTHeaderTransportFactoryConf(factory, &TConfiguration{
+		noPropagation: true,
+	})
+}
+
+// NewTHeaderTransportFactoryConf creates a new *THeaderTransportFactory with
+// the given *TConfiguration.
+func NewTHeaderTransportFactoryConf(factory TTransportFactory, conf *TConfiguration) TTransportFactory {
+	return &THeaderTransportFactory{
+		Factory: factory,
+
+		cfg: conf,
+	}
+}
+
+// GetTransport implements TTransportFactory.
+func (f *THeaderTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	if f.Factory != nil {
+		t, err := f.Factory.GetTransport(trans)
+		if err != nil {
+			return nil, err
+		}
+		return NewTHeaderTransportConf(t, f.cfg), nil
+	}
+	return NewTHeaderTransportConf(trans, f.cfg), nil
+}
+
+// SetTConfiguration implements TConfigurationSetter.
+func (f *THeaderTransportFactory) SetTConfiguration(cfg *TConfiguration) {
+	PropagateTConfiguration(f.Factory, f.cfg)
+	f.cfg = cfg
+}
+
+var (
+	_ TConfigurationSetter = (*THeaderTransportFactory)(nil)
+	_ TConfigurationSetter = (*THeaderTransport)(nil)
+)
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/logger.go b/vendor/github.com/uber/jaeger-client-go/thrift/logger.go
new file mode 100644
index 0000000..50d44ec
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/logger.go
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"log"
+	"os"
+)
+
+// Logger is a simple wrapper of a logging function.
+//
+// In reality the users might actually use different logging libraries, and they
+// are not always compatible with each other.
+//
+// Logger is meant to be a simple common ground that it's easy to wrap whatever
+// logging library they use into.
+//
+// See https://issues.apache.org/jira/browse/THRIFT-4985 for the design
+// discussion behind it.
+type Logger func(msg string)
+
+// NopLogger is a Logger implementation that does nothing.
+func NopLogger(msg string) {}
+
+// StdLogger wraps stdlib log package into a Logger.
+//
+// If logger passed in is nil, it will fallback to use stderr and default flags.
+func StdLogger(logger *log.Logger) Logger {
+	if logger == nil {
+		logger = log.New(os.Stderr, "", log.LstdFlags)
+	}
+	return func(msg string) {
+		logger.Print(msg)
+	}
+}
+
+func fallbackLogger(logger Logger) Logger {
+	if logger == nil {
+		return StdLogger(nil)
+	}
+	return logger
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/memory_buffer.go b/vendor/github.com/uber/jaeger-client-go/thrift/memory_buffer.go
new file mode 100644
index 0000000..5936d27
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/memory_buffer.go
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bytes"
+	"context"
+)
+
+// Memory buffer-based implementation of the TTransport interface.
+type TMemoryBuffer struct {
+	*bytes.Buffer
+	size int
+}
+
+type TMemoryBufferTransportFactory struct {
+	size int
+}
+
+func (p *TMemoryBufferTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	if trans != nil {
+		t, ok := trans.(*TMemoryBuffer)
+		if ok && t.size > 0 {
+			return NewTMemoryBufferLen(t.size), nil
+		}
+	}
+	return NewTMemoryBufferLen(p.size), nil
+}
+
+func NewTMemoryBufferTransportFactory(size int) *TMemoryBufferTransportFactory {
+	return &TMemoryBufferTransportFactory{size: size}
+}
+
+func NewTMemoryBuffer() *TMemoryBuffer {
+	return &TMemoryBuffer{Buffer: &bytes.Buffer{}, size: 0}
+}
+
+func NewTMemoryBufferLen(size int) *TMemoryBuffer {
+	buf := make([]byte, 0, size)
+	return &TMemoryBuffer{Buffer: bytes.NewBuffer(buf), size: size}
+}
+
+func (p *TMemoryBuffer) IsOpen() bool {
+	return true
+}
+
+func (p *TMemoryBuffer) Open() error {
+	return nil
+}
+
+func (p *TMemoryBuffer) Close() error {
+	p.Buffer.Reset()
+	return nil
+}
+
+// Flushing a memory buffer is a no-op
+func (p *TMemoryBuffer) Flush(ctx context.Context) error {
+	return nil
+}
+
+func (p *TMemoryBuffer) RemainingBytes() (num_bytes uint64) {
+	return uint64(p.Buffer.Len())
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/messagetype.go b/vendor/github.com/uber/jaeger-client-go/thrift/messagetype.go
new file mode 100644
index 0000000..25ab2e9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/messagetype.go
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Message type constants in the Thrift protocol.
+type TMessageType int32
+
+const (
+	INVALID_TMESSAGE_TYPE TMessageType = 0
+	CALL                  TMessageType = 1
+	REPLY                 TMessageType = 2
+	EXCEPTION             TMessageType = 3
+	ONEWAY                TMessageType = 4
+)
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/numeric.go b/vendor/github.com/uber/jaeger-client-go/thrift/numeric.go
new file mode 100644
index 0000000..e4512d2
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/numeric.go
@@ -0,0 +1,164 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"math"
+	"strconv"
+)
+
+type Numeric interface {
+	Int64() int64
+	Int32() int32
+	Int16() int16
+	Byte() byte
+	Int() int
+	Float64() float64
+	Float32() float32
+	String() string
+	isNull() bool
+}
+
+type numeric struct {
+	iValue int64
+	dValue float64
+	sValue string
+	isNil  bool
+}
+
+var (
+	INFINITY          Numeric
+	NEGATIVE_INFINITY Numeric
+	NAN               Numeric
+	ZERO              Numeric
+	NUMERIC_NULL      Numeric
+)
+
+func NewNumericFromDouble(dValue float64) Numeric {
+	if math.IsInf(dValue, 1) {
+		return INFINITY
+	}
+	if math.IsInf(dValue, -1) {
+		return NEGATIVE_INFINITY
+	}
+	if math.IsNaN(dValue) {
+		return NAN
+	}
+	iValue := int64(dValue)
+	sValue := strconv.FormatFloat(dValue, 'g', 10, 64)
+	isNil := false
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromI64(iValue int64) Numeric {
+	dValue := float64(iValue)
+	sValue := strconv.FormatInt(iValue, 10)
+	isNil := false
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromI32(iValue int32) Numeric {
+	dValue := float64(iValue)
+	sValue := strconv.FormatInt(int64(iValue), 10)
+	isNil := false
+	return &numeric{iValue: int64(iValue), dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromString(sValue string) Numeric {
+	if sValue == INFINITY.String() {
+		return INFINITY
+	}
+	if sValue == NEGATIVE_INFINITY.String() {
+		return NEGATIVE_INFINITY
+	}
+	if sValue == NAN.String() {
+		return NAN
+	}
+	iValue, _ := strconv.ParseInt(sValue, 10, 64)
+	dValue, _ := strconv.ParseFloat(sValue, 64)
+	isNil := len(sValue) == 0
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
+}
+
+func NewNumericFromJSONString(sValue string, isNull bool) Numeric {
+	if isNull {
+		return NewNullNumeric()
+	}
+	if sValue == JSON_INFINITY {
+		return INFINITY
+	}
+	if sValue == JSON_NEGATIVE_INFINITY {
+		return NEGATIVE_INFINITY
+	}
+	if sValue == JSON_NAN {
+		return NAN
+	}
+	iValue, _ := strconv.ParseInt(sValue, 10, 64)
+	dValue, _ := strconv.ParseFloat(sValue, 64)
+	return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNull}
+}
+
+func NewNullNumeric() Numeric {
+	return &numeric{iValue: 0, dValue: 0.0, sValue: "", isNil: true}
+}
+
+func (p *numeric) Int64() int64 {
+	return p.iValue
+}
+
+func (p *numeric) Int32() int32 {
+	return int32(p.iValue)
+}
+
+func (p *numeric) Int16() int16 {
+	return int16(p.iValue)
+}
+
+func (p *numeric) Byte() byte {
+	return byte(p.iValue)
+}
+
+func (p *numeric) Int() int {
+	return int(p.iValue)
+}
+
+func (p *numeric) Float64() float64 {
+	return p.dValue
+}
+
+func (p *numeric) Float32() float32 {
+	return float32(p.dValue)
+}
+
+func (p *numeric) String() string {
+	return p.sValue
+}
+
+func (p *numeric) isNull() bool {
+	return p.isNil
+}
+
+func init() {
+	INFINITY = &numeric{iValue: 0, dValue: math.Inf(1), sValue: "Infinity", isNil: false}
+	NEGATIVE_INFINITY = &numeric{iValue: 0, dValue: math.Inf(-1), sValue: "-Infinity", isNil: false}
+	NAN = &numeric{iValue: 0, dValue: math.NaN(), sValue: "NaN", isNil: false}
+	ZERO = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: false}
+	NUMERIC_NULL = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: true}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/processor_factory.go b/vendor/github.com/uber/jaeger-client-go/thrift/processor_factory.go
new file mode 100644
index 0000000..245a3cc
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/processor_factory.go
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import "context"
+
+// A processor is a generic object which operates upon an input stream and
+// writes to some output stream.
+type TProcessor interface {
+	Process(ctx context.Context, in, out TProtocol) (bool, TException)
+
+	// ProcessorMap returns a map of thrift method names to TProcessorFunctions.
+	ProcessorMap() map[string]TProcessorFunction
+
+	// AddToProcessorMap adds the given TProcessorFunction to the internal
+	// processor map at the given key.
+	//
+	// If one is already set at the given key, it will be replaced with the new
+	// TProcessorFunction.
+	AddToProcessorMap(string, TProcessorFunction)
+}
+
+type TProcessorFunction interface {
+	Process(ctx context.Context, seqId int32, in, out TProtocol) (bool, TException)
+}
+
+// The default processor factory just returns a singleton
+// instance.
+type TProcessorFactory interface {
+	GetProcessor(trans TTransport) TProcessor
+}
+
+type tProcessorFactory struct {
+	processor TProcessor
+}
+
+func NewTProcessorFactory(p TProcessor) TProcessorFactory {
+	return &tProcessorFactory{processor: p}
+}
+
+func (p *tProcessorFactory) GetProcessor(trans TTransport) TProcessor {
+	return p.processor
+}
+
+/**
+ * The default processor factory just returns a singleton
+ * instance.
+ */
+type TProcessorFunctionFactory interface {
+	GetProcessorFunction(trans TTransport) TProcessorFunction
+}
+
+type tProcessorFunctionFactory struct {
+	processor TProcessorFunction
+}
+
+func NewTProcessorFunctionFactory(p TProcessorFunction) TProcessorFunctionFactory {
+	return &tProcessorFunctionFactory{processor: p}
+}
+
+func (p *tProcessorFunctionFactory) GetProcessorFunction(trans TTransport) TProcessorFunction {
+	return p.processor
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/protocol.go
new file mode 100644
index 0000000..0a69bd4
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/protocol.go
@@ -0,0 +1,177 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"errors"
+	"fmt"
+)
+
+const (
+	VERSION_MASK = 0xffff0000
+	VERSION_1    = 0x80010000
+)
+
+type TProtocol interface {
+	WriteMessageBegin(ctx context.Context, name string, typeId TMessageType, seqid int32) error
+	WriteMessageEnd(ctx context.Context) error
+	WriteStructBegin(ctx context.Context, name string) error
+	WriteStructEnd(ctx context.Context) error
+	WriteFieldBegin(ctx context.Context, name string, typeId TType, id int16) error
+	WriteFieldEnd(ctx context.Context) error
+	WriteFieldStop(ctx context.Context) error
+	WriteMapBegin(ctx context.Context, keyType TType, valueType TType, size int) error
+	WriteMapEnd(ctx context.Context) error
+	WriteListBegin(ctx context.Context, elemType TType, size int) error
+	WriteListEnd(ctx context.Context) error
+	WriteSetBegin(ctx context.Context, elemType TType, size int) error
+	WriteSetEnd(ctx context.Context) error
+	WriteBool(ctx context.Context, value bool) error
+	WriteByte(ctx context.Context, value int8) error
+	WriteI16(ctx context.Context, value int16) error
+	WriteI32(ctx context.Context, value int32) error
+	WriteI64(ctx context.Context, value int64) error
+	WriteDouble(ctx context.Context, value float64) error
+	WriteString(ctx context.Context, value string) error
+	WriteBinary(ctx context.Context, value []byte) error
+
+	ReadMessageBegin(ctx context.Context) (name string, typeId TMessageType, seqid int32, err error)
+	ReadMessageEnd(ctx context.Context) error
+	ReadStructBegin(ctx context.Context) (name string, err error)
+	ReadStructEnd(ctx context.Context) error
+	ReadFieldBegin(ctx context.Context) (name string, typeId TType, id int16, err error)
+	ReadFieldEnd(ctx context.Context) error
+	ReadMapBegin(ctx context.Context) (keyType TType, valueType TType, size int, err error)
+	ReadMapEnd(ctx context.Context) error
+	ReadListBegin(ctx context.Context) (elemType TType, size int, err error)
+	ReadListEnd(ctx context.Context) error
+	ReadSetBegin(ctx context.Context) (elemType TType, size int, err error)
+	ReadSetEnd(ctx context.Context) error
+	ReadBool(ctx context.Context) (value bool, err error)
+	ReadByte(ctx context.Context) (value int8, err error)
+	ReadI16(ctx context.Context) (value int16, err error)
+	ReadI32(ctx context.Context) (value int32, err error)
+	ReadI64(ctx context.Context) (value int64, err error)
+	ReadDouble(ctx context.Context) (value float64, err error)
+	ReadString(ctx context.Context) (value string, err error)
+	ReadBinary(ctx context.Context) (value []byte, err error)
+
+	Skip(ctx context.Context, fieldType TType) (err error)
+	Flush(ctx context.Context) (err error)
+
+	Transport() TTransport
+}
+
+// The maximum recursive depth the skip() function will traverse
+const DEFAULT_RECURSION_DEPTH = 64
+
+// Skips over the next data element from the provided input TProtocol object.
+func SkipDefaultDepth(ctx context.Context, prot TProtocol, typeId TType) (err error) {
+	return Skip(ctx, prot, typeId, DEFAULT_RECURSION_DEPTH)
+}
+
+// Skips over the next data element from the provided input TProtocol object.
+func Skip(ctx context.Context, self TProtocol, fieldType TType, maxDepth int) (err error) {
+
+	if maxDepth <= 0 {
+		return NewTProtocolExceptionWithType(DEPTH_LIMIT, errors.New("Depth limit exceeded"))
+	}
+
+	switch fieldType {
+	case BOOL:
+		_, err = self.ReadBool(ctx)
+		return
+	case BYTE:
+		_, err = self.ReadByte(ctx)
+		return
+	case I16:
+		_, err = self.ReadI16(ctx)
+		return
+	case I32:
+		_, err = self.ReadI32(ctx)
+		return
+	case I64:
+		_, err = self.ReadI64(ctx)
+		return
+	case DOUBLE:
+		_, err = self.ReadDouble(ctx)
+		return
+	case STRING:
+		_, err = self.ReadString(ctx)
+		return
+	case STRUCT:
+		if _, err = self.ReadStructBegin(ctx); err != nil {
+			return err
+		}
+		for {
+			_, typeId, _, _ := self.ReadFieldBegin(ctx)
+			if typeId == STOP {
+				break
+			}
+			err := Skip(ctx, self, typeId, maxDepth-1)
+			if err != nil {
+				return err
+			}
+			self.ReadFieldEnd(ctx)
+		}
+		return self.ReadStructEnd(ctx)
+	case MAP:
+		keyType, valueType, size, err := self.ReadMapBegin(ctx)
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(ctx, self, keyType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+			self.Skip(ctx, valueType)
+		}
+		return self.ReadMapEnd(ctx)
+	case SET:
+		elemType, size, err := self.ReadSetBegin(ctx)
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(ctx, self, elemType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+		}
+		return self.ReadSetEnd(ctx)
+	case LIST:
+		elemType, size, err := self.ReadListBegin(ctx)
+		if err != nil {
+			return err
+		}
+		for i := 0; i < size; i++ {
+			err := Skip(ctx, self, elemType, maxDepth-1)
+			if err != nil {
+				return err
+			}
+		}
+		return self.ReadListEnd(ctx)
+	default:
+		return NewTProtocolExceptionWithType(INVALID_DATA, errors.New(fmt.Sprintf("Unknown data type %d", fieldType)))
+	}
+	return nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/protocol_exception.go b/vendor/github.com/uber/jaeger-client-go/thrift/protocol_exception.go
new file mode 100644
index 0000000..9dcf4bf
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/protocol_exception.go
@@ -0,0 +1,104 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"encoding/base64"
+	"errors"
+)
+
+// Thrift Protocol exception
+type TProtocolException interface {
+	TException
+	TypeId() int
+}
+
+const (
+	UNKNOWN_PROTOCOL_EXCEPTION = 0
+	INVALID_DATA               = 1
+	NEGATIVE_SIZE              = 2
+	SIZE_LIMIT                 = 3
+	BAD_VERSION                = 4
+	NOT_IMPLEMENTED            = 5
+	DEPTH_LIMIT                = 6
+)
+
+type tProtocolException struct {
+	typeId int
+	err    error
+	msg    string
+}
+
+var _ TProtocolException = (*tProtocolException)(nil)
+
+func (tProtocolException) TExceptionType() TExceptionType {
+	return TExceptionTypeProtocol
+}
+
+func (p *tProtocolException) TypeId() int {
+	return p.typeId
+}
+
+func (p *tProtocolException) String() string {
+	return p.msg
+}
+
+func (p *tProtocolException) Error() string {
+	return p.msg
+}
+
+func (p *tProtocolException) Unwrap() error {
+	return p.err
+}
+
+func NewTProtocolException(err error) TProtocolException {
+	if err == nil {
+		return nil
+	}
+
+	if e, ok := err.(TProtocolException); ok {
+		return e
+	}
+
+	if errors.As(err, new(base64.CorruptInputError)) {
+		return NewTProtocolExceptionWithType(INVALID_DATA, err)
+	}
+
+	return NewTProtocolExceptionWithType(UNKNOWN_PROTOCOL_EXCEPTION, err)
+}
+
+func NewTProtocolExceptionWithType(errType int, err error) TProtocolException {
+	if err == nil {
+		return nil
+	}
+	return &tProtocolException{
+		typeId: errType,
+		err:    err,
+		msg:    err.Error(),
+	}
+}
+
+func prependTProtocolException(prepend string, err TProtocolException) TProtocolException {
+	return &tProtocolException{
+		typeId: err.TypeId(),
+		err:    err,
+		msg:    prepend + err.Error(),
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/protocol_factory.go b/vendor/github.com/uber/jaeger-client-go/thrift/protocol_factory.go
new file mode 100644
index 0000000..c40f796
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/protocol_factory.go
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Factory interface for constructing protocol instances.
+type TProtocolFactory interface {
+	GetProtocol(trans TTransport) TProtocol
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/response_helper.go b/vendor/github.com/uber/jaeger-client-go/thrift/response_helper.go
new file mode 100644
index 0000000..d884c6a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/response_helper.go
@@ -0,0 +1,94 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+)
+
+// See https://godoc.org/context#WithValue on why do we need the unexported typedefs.
+type responseHelperKey struct{}
+
+// TResponseHelper defines a object with a set of helper functions that can be
+// retrieved from the context object passed into server handler functions.
+//
+// Use GetResponseHelper to retrieve the injected TResponseHelper implementation
+// from the context object.
+//
+// The zero value of TResponseHelper is valid with all helper functions being
+// no-op.
+type TResponseHelper struct {
+	// THeader related functions
+	*THeaderResponseHelper
+}
+
+// THeaderResponseHelper defines THeader related TResponseHelper functions.
+//
+// The zero value of *THeaderResponseHelper is valid with all helper functions
+// being no-op.
+type THeaderResponseHelper struct {
+	proto *THeaderProtocol
+}
+
+// NewTHeaderResponseHelper creates a new THeaderResponseHelper from the
+// underlying TProtocol.
+func NewTHeaderResponseHelper(proto TProtocol) *THeaderResponseHelper {
+	if hp, ok := proto.(*THeaderProtocol); ok {
+		return &THeaderResponseHelper{
+			proto: hp,
+		}
+	}
+	return nil
+}
+
+// SetHeader sets a response header.
+//
+// It's no-op if the underlying protocol/transport does not support THeader.
+func (h *THeaderResponseHelper) SetHeader(key, value string) {
+	if h != nil && h.proto != nil {
+		h.proto.SetWriteHeader(key, value)
+	}
+}
+
+// ClearHeaders clears all the response headers previously set.
+//
+// It's no-op if the underlying protocol/transport does not support THeader.
+func (h *THeaderResponseHelper) ClearHeaders() {
+	if h != nil && h.proto != nil {
+		h.proto.ClearWriteHeaders()
+	}
+}
+
+// GetResponseHelper retrieves the TResponseHelper implementation injected into
+// the context object.
+//
+// If no helper was found in the context object, a nop helper with ok == false
+// will be returned.
+func GetResponseHelper(ctx context.Context) (helper TResponseHelper, ok bool) {
+	if v := ctx.Value(responseHelperKey{}); v != nil {
+		helper, ok = v.(TResponseHelper)
+	}
+	return
+}
+
+// SetResponseHelper injects TResponseHelper into the context object.
+func SetResponseHelper(ctx context.Context, helper TResponseHelper) context.Context {
+	return context.WithValue(ctx, responseHelperKey{}, helper)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/rich_transport.go b/vendor/github.com/uber/jaeger-client-go/thrift/rich_transport.go
new file mode 100644
index 0000000..83fdf29
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/rich_transport.go
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+	"io"
+)
+
+type RichTransport struct {
+	TTransport
+}
+
+// Wraps Transport to provide TRichTransport interface
+func NewTRichTransport(trans TTransport) *RichTransport {
+	return &RichTransport{trans}
+}
+
+func (r *RichTransport) ReadByte() (c byte, err error) {
+	return readByte(r.TTransport)
+}
+
+func (r *RichTransport) WriteByte(c byte) error {
+	return writeByte(r.TTransport, c)
+}
+
+func (r *RichTransport) WriteString(s string) (n int, err error) {
+	return r.Write([]byte(s))
+}
+
+func (r *RichTransport) RemainingBytes() (num_bytes uint64) {
+	return r.TTransport.RemainingBytes()
+}
+
+func readByte(r io.Reader) (c byte, err error) {
+	v := [1]byte{0}
+	n, err := r.Read(v[0:1])
+	if n > 0 && (err == nil || errors.Is(err, io.EOF)) {
+		return v[0], nil
+	}
+	if n > 0 && err != nil {
+		return v[0], err
+	}
+	if err != nil {
+		return 0, err
+	}
+	return v[0], nil
+}
+
+func writeByte(w io.Writer, c byte) error {
+	v := [1]byte{c}
+	_, err := w.Write(v[0:1])
+	return err
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/serializer.go b/vendor/github.com/uber/jaeger-client-go/thrift/serializer.go
new file mode 100644
index 0000000..c449790
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/serializer.go
@@ -0,0 +1,136 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"sync"
+)
+
+type TSerializer struct {
+	Transport *TMemoryBuffer
+	Protocol  TProtocol
+}
+
+type TStruct interface {
+	Write(ctx context.Context, p TProtocol) error
+	Read(ctx context.Context, p TProtocol) error
+}
+
+func NewTSerializer() *TSerializer {
+	transport := NewTMemoryBufferLen(1024)
+	protocol := NewTBinaryProtocolTransport(transport)
+
+	return &TSerializer{
+		Transport: transport,
+		Protocol:  protocol,
+	}
+}
+
+func (t *TSerializer) WriteString(ctx context.Context, msg TStruct) (s string, err error) {
+	t.Transport.Reset()
+
+	if err = msg.Write(ctx, t.Protocol); err != nil {
+		return
+	}
+
+	if err = t.Protocol.Flush(ctx); err != nil {
+		return
+	}
+	if err = t.Transport.Flush(ctx); err != nil {
+		return
+	}
+
+	return t.Transport.String(), nil
+}
+
+func (t *TSerializer) Write(ctx context.Context, msg TStruct) (b []byte, err error) {
+	t.Transport.Reset()
+
+	if err = msg.Write(ctx, t.Protocol); err != nil {
+		return
+	}
+
+	if err = t.Protocol.Flush(ctx); err != nil {
+		return
+	}
+
+	if err = t.Transport.Flush(ctx); err != nil {
+		return
+	}
+
+	b = append(b, t.Transport.Bytes()...)
+	return
+}
+
+// TSerializerPool is the thread-safe version of TSerializer, it uses resource
+// pool of TSerializer under the hood.
+//
+// It must be initialized with either NewTSerializerPool or
+// NewTSerializerPoolSizeFactory.
+type TSerializerPool struct {
+	pool sync.Pool
+}
+
+// NewTSerializerPool creates a new TSerializerPool.
+//
+// NewTSerializer can be used as the arg here.
+func NewTSerializerPool(f func() *TSerializer) *TSerializerPool {
+	return &TSerializerPool{
+		pool: sync.Pool{
+			New: func() interface{} {
+				return f()
+			},
+		},
+	}
+}
+
+// NewTSerializerPoolSizeFactory creates a new TSerializerPool with the given
+// size and protocol factory.
+//
+// Note that the size is not the limit. The TMemoryBuffer underneath can grow
+// larger than that. It just dictates the initial size.
+func NewTSerializerPoolSizeFactory(size int, factory TProtocolFactory) *TSerializerPool {
+	return &TSerializerPool{
+		pool: sync.Pool{
+			New: func() interface{} {
+				transport := NewTMemoryBufferLen(size)
+				protocol := factory.GetProtocol(transport)
+
+				return &TSerializer{
+					Transport: transport,
+					Protocol:  protocol,
+				}
+			},
+		},
+	}
+}
+
+func (t *TSerializerPool) WriteString(ctx context.Context, msg TStruct) (string, error) {
+	s := t.pool.Get().(*TSerializer)
+	defer t.pool.Put(s)
+	return s.WriteString(ctx, msg)
+}
+
+func (t *TSerializerPool) Write(ctx context.Context, msg TStruct) ([]byte, error) {
+	s := t.pool.Get().(*TSerializer)
+	defer t.pool.Put(s)
+	return s.Write(ctx, msg)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/server_transport.go b/vendor/github.com/uber/jaeger-client-go/thrift/server_transport.go
new file mode 100644
index 0000000..51c40b6
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/server_transport.go
@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Server transport. Object which provides client transports.
+type TServerTransport interface {
+	Listen() error
+	Accept() (TTransport, error)
+	Close() error
+
+	// Optional method implementation. This signals to the server transport
+	// that it should break out of any accept() or listen() that it is currently
+	// blocked on. This method, if implemented, MUST be thread safe, as it may
+	// be called from a different thread context than the other TServerTransport
+	// methods.
+	Interrupt() error
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go b/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go
new file mode 100644
index 0000000..d1a8154
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/simple_json_protocol.go
@@ -0,0 +1,1373 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+)
+
+type _ParseContext int
+
+const (
+	_CONTEXT_INVALID              _ParseContext = iota
+	_CONTEXT_IN_TOPLEVEL                        // 1
+	_CONTEXT_IN_LIST_FIRST                      // 2
+	_CONTEXT_IN_LIST                            // 3
+	_CONTEXT_IN_OBJECT_FIRST                    // 4
+	_CONTEXT_IN_OBJECT_NEXT_KEY                 // 5
+	_CONTEXT_IN_OBJECT_NEXT_VALUE               // 6
+)
+
+func (p _ParseContext) String() string {
+	switch p {
+	case _CONTEXT_IN_TOPLEVEL:
+		return "TOPLEVEL"
+	case _CONTEXT_IN_LIST_FIRST:
+		return "LIST-FIRST"
+	case _CONTEXT_IN_LIST:
+		return "LIST"
+	case _CONTEXT_IN_OBJECT_FIRST:
+		return "OBJECT-FIRST"
+	case _CONTEXT_IN_OBJECT_NEXT_KEY:
+		return "OBJECT-NEXT-KEY"
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		return "OBJECT-NEXT-VALUE"
+	}
+	return "UNKNOWN-PARSE-CONTEXT"
+}
+
+type jsonContextStack []_ParseContext
+
+func (s *jsonContextStack) push(v _ParseContext) {
+	*s = append(*s, v)
+}
+
+func (s jsonContextStack) peek() (v _ParseContext, ok bool) {
+	l := len(s)
+	if l <= 0 {
+		return
+	}
+	return s[l-1], true
+}
+
+func (s *jsonContextStack) pop() (v _ParseContext, ok bool) {
+	l := len(*s)
+	if l <= 0 {
+		return
+	}
+	v = (*s)[l-1]
+	*s = (*s)[0 : l-1]
+	return v, true
+}
+
+var errEmptyJSONContextStack = NewTProtocolExceptionWithType(INVALID_DATA, errors.New("Unexpected empty json protocol context stack"))
+
+// Simple JSON protocol implementation for thrift.
+//
+// This protocol produces/consumes a simple output format
+// suitable for parsing by scripting languages.  It should not be
+// confused with the full-featured TJSONProtocol.
+//
+type TSimpleJSONProtocol struct {
+	trans TTransport
+
+	parseContextStack jsonContextStack
+	dumpContext       jsonContextStack
+
+	writer *bufio.Writer
+	reader *bufio.Reader
+}
+
+// Constructor
+func NewTSimpleJSONProtocol(t TTransport) *TSimpleJSONProtocol {
+	v := &TSimpleJSONProtocol{trans: t,
+		writer: bufio.NewWriter(t),
+		reader: bufio.NewReader(t),
+	}
+	v.parseContextStack.push(_CONTEXT_IN_TOPLEVEL)
+	v.dumpContext.push(_CONTEXT_IN_TOPLEVEL)
+	return v
+}
+
+// Factory
+type TSimpleJSONProtocolFactory struct{}
+
+func (p *TSimpleJSONProtocolFactory) GetProtocol(trans TTransport) TProtocol {
+	return NewTSimpleJSONProtocol(trans)
+}
+
+func NewTSimpleJSONProtocolFactory() *TSimpleJSONProtocolFactory {
+	return &TSimpleJSONProtocolFactory{}
+}
+
+var (
+	JSON_COMMA                   []byte
+	JSON_COLON                   []byte
+	JSON_LBRACE                  []byte
+	JSON_RBRACE                  []byte
+	JSON_LBRACKET                []byte
+	JSON_RBRACKET                []byte
+	JSON_QUOTE                   byte
+	JSON_QUOTE_BYTES             []byte
+	JSON_NULL                    []byte
+	JSON_TRUE                    []byte
+	JSON_FALSE                   []byte
+	JSON_INFINITY                string
+	JSON_NEGATIVE_INFINITY       string
+	JSON_NAN                     string
+	JSON_INFINITY_BYTES          []byte
+	JSON_NEGATIVE_INFINITY_BYTES []byte
+	JSON_NAN_BYTES               []byte
+	json_nonbase_map_elem_bytes  []byte
+)
+
+func init() {
+	JSON_COMMA = []byte{','}
+	JSON_COLON = []byte{':'}
+	JSON_LBRACE = []byte{'{'}
+	JSON_RBRACE = []byte{'}'}
+	JSON_LBRACKET = []byte{'['}
+	JSON_RBRACKET = []byte{']'}
+	JSON_QUOTE = '"'
+	JSON_QUOTE_BYTES = []byte{'"'}
+	JSON_NULL = []byte{'n', 'u', 'l', 'l'}
+	JSON_TRUE = []byte{'t', 'r', 'u', 'e'}
+	JSON_FALSE = []byte{'f', 'a', 'l', 's', 'e'}
+	JSON_INFINITY = "Infinity"
+	JSON_NEGATIVE_INFINITY = "-Infinity"
+	JSON_NAN = "NaN"
+	JSON_INFINITY_BYTES = []byte{'I', 'n', 'f', 'i', 'n', 'i', 't', 'y'}
+	JSON_NEGATIVE_INFINITY_BYTES = []byte{'-', 'I', 'n', 'f', 'i', 'n', 'i', 't', 'y'}
+	JSON_NAN_BYTES = []byte{'N', 'a', 'N'}
+	json_nonbase_map_elem_bytes = []byte{']', ',', '['}
+}
+
+func jsonQuote(s string) string {
+	b, _ := json.Marshal(s)
+	s1 := string(b)
+	return s1
+}
+
+func jsonUnquote(s string) (string, bool) {
+	s1 := new(string)
+	err := json.Unmarshal([]byte(s), s1)
+	return *s1, err == nil
+}
+
+func mismatch(expected, actual string) error {
+	return fmt.Errorf("Expected '%s' but found '%s' while parsing JSON.", expected, actual)
+}
+
+func (p *TSimpleJSONProtocol) WriteMessageBegin(ctx context.Context, name string, typeId TMessageType, seqId int32) error {
+	p.resetContextStack() // THRIFT-3735
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	if e := p.WriteString(ctx, name); e != nil {
+		return e
+	}
+	if e := p.WriteByte(ctx, int8(typeId)); e != nil {
+		return e
+	}
+	if e := p.WriteI32(ctx, seqId); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) WriteMessageEnd(ctx context.Context) error {
+	return p.OutputListEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteStructBegin(ctx context.Context, name string) error {
+	if e := p.OutputObjectBegin(); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) WriteStructEnd(ctx context.Context) error {
+	return p.OutputObjectEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteFieldBegin(ctx context.Context, name string, typeId TType, id int16) error {
+	if e := p.WriteString(ctx, name); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) WriteFieldEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) WriteFieldStop(ctx context.Context) error { return nil }
+
+func (p *TSimpleJSONProtocol) WriteMapBegin(ctx context.Context, keyType TType, valueType TType, size int) error {
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	if e := p.WriteByte(ctx, int8(keyType)); e != nil {
+		return e
+	}
+	if e := p.WriteByte(ctx, int8(valueType)); e != nil {
+		return e
+	}
+	return p.WriteI32(ctx, int32(size))
+}
+
+func (p *TSimpleJSONProtocol) WriteMapEnd(ctx context.Context) error {
+	return p.OutputListEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteListBegin(ctx context.Context, elemType TType, size int) error {
+	return p.OutputElemListBegin(elemType, size)
+}
+
+func (p *TSimpleJSONProtocol) WriteListEnd(ctx context.Context) error {
+	return p.OutputListEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteSetBegin(ctx context.Context, elemType TType, size int) error {
+	return p.OutputElemListBegin(elemType, size)
+}
+
+func (p *TSimpleJSONProtocol) WriteSetEnd(ctx context.Context) error {
+	return p.OutputListEnd()
+}
+
+func (p *TSimpleJSONProtocol) WriteBool(ctx context.Context, b bool) error {
+	return p.OutputBool(b)
+}
+
+func (p *TSimpleJSONProtocol) WriteByte(ctx context.Context, b int8) error {
+	return p.WriteI32(ctx, int32(b))
+}
+
+func (p *TSimpleJSONProtocol) WriteI16(ctx context.Context, v int16) error {
+	return p.WriteI32(ctx, int32(v))
+}
+
+func (p *TSimpleJSONProtocol) WriteI32(ctx context.Context, v int32) error {
+	return p.OutputI64(int64(v))
+}
+
+func (p *TSimpleJSONProtocol) WriteI64(ctx context.Context, v int64) error {
+	return p.OutputI64(int64(v))
+}
+
+func (p *TSimpleJSONProtocol) WriteDouble(ctx context.Context, v float64) error {
+	return p.OutputF64(v)
+}
+
+func (p *TSimpleJSONProtocol) WriteString(ctx context.Context, v string) error {
+	return p.OutputString(v)
+}
+
+func (p *TSimpleJSONProtocol) WriteBinary(ctx context.Context, v []byte) error {
+	// JSON library only takes in a string,
+	// not an arbitrary byte array, to ensure bytes are transmitted
+	// efficiently we must convert this into a valid JSON string
+	// therefore we use base64 encoding to avoid excessive escaping/quoting
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_QUOTE_BYTES); e != nil {
+		return NewTProtocolException(e)
+	}
+	writer := base64.NewEncoder(base64.StdEncoding, p.writer)
+	if _, e := writer.Write(v); e != nil {
+		p.writer.Reset(p.trans) // THRIFT-3735
+		return NewTProtocolException(e)
+	}
+	if e := writer.Close(); e != nil {
+		return NewTProtocolException(e)
+	}
+	if _, e := p.write(JSON_QUOTE_BYTES); e != nil {
+		return NewTProtocolException(e)
+	}
+	return p.OutputPostValue()
+}
+
+// Reading methods.
+func (p *TSimpleJSONProtocol) ReadMessageBegin(ctx context.Context) (name string, typeId TMessageType, seqId int32, err error) {
+	p.resetContextStack() // THRIFT-3735
+	if isNull, err := p.ParseListBegin(); isNull || err != nil {
+		return name, typeId, seqId, err
+	}
+	if name, err = p.ReadString(ctx); err != nil {
+		return name, typeId, seqId, err
+	}
+	bTypeId, err := p.ReadByte(ctx)
+	typeId = TMessageType(bTypeId)
+	if err != nil {
+		return name, typeId, seqId, err
+	}
+	if seqId, err = p.ReadI32(ctx); err != nil {
+		return name, typeId, seqId, err
+	}
+	return name, typeId, seqId, nil
+}
+
+func (p *TSimpleJSONProtocol) ReadMessageEnd(ctx context.Context) error {
+	return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadStructBegin(ctx context.Context) (name string, err error) {
+	_, err = p.ParseObjectStart()
+	return "", err
+}
+
+func (p *TSimpleJSONProtocol) ReadStructEnd(ctx context.Context) error {
+	return p.ParseObjectEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadFieldBegin(ctx context.Context) (string, TType, int16, error) {
+	if err := p.ParsePreValue(); err != nil {
+		return "", STOP, 0, err
+	}
+	b, _ := p.reader.Peek(1)
+	if len(b) > 0 {
+		switch b[0] {
+		case JSON_RBRACE[0]:
+			return "", STOP, 0, nil
+		case JSON_QUOTE:
+			p.reader.ReadByte()
+			name, err := p.ParseStringBody()
+			// simplejson is not meant to be read back into thrift
+			// - see http://wiki.apache.org/thrift/ThriftUsageJava
+			// - use JSON instead
+			if err != nil {
+				return name, STOP, 0, err
+			}
+			return name, STOP, -1, p.ParsePostValue()
+		}
+		e := fmt.Errorf("Expected \"}\" or '\"', but found: '%s'", string(b))
+		return "", STOP, 0, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return "", STOP, 0, NewTProtocolException(io.EOF)
+}
+
+func (p *TSimpleJSONProtocol) ReadFieldEnd(ctx context.Context) error {
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) ReadMapBegin(ctx context.Context) (keyType TType, valueType TType, size int, e error) {
+	if isNull, e := p.ParseListBegin(); isNull || e != nil {
+		return VOID, VOID, 0, e
+	}
+
+	// read keyType
+	bKeyType, e := p.ReadByte(ctx)
+	keyType = TType(bKeyType)
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+
+	// read valueType
+	bValueType, e := p.ReadByte(ctx)
+	valueType = TType(bValueType)
+	if e != nil {
+		return keyType, valueType, size, e
+	}
+
+	// read size
+	iSize, err := p.ReadI64(ctx)
+	size = int(iSize)
+	return keyType, valueType, size, err
+}
+
+func (p *TSimpleJSONProtocol) ReadMapEnd(ctx context.Context) error {
+	return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadListBegin(ctx context.Context) (elemType TType, size int, e error) {
+	return p.ParseElemListBegin()
+}
+
+func (p *TSimpleJSONProtocol) ReadListEnd(ctx context.Context) error {
+	return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadSetBegin(ctx context.Context) (elemType TType, size int, e error) {
+	return p.ParseElemListBegin()
+}
+
+func (p *TSimpleJSONProtocol) ReadSetEnd(ctx context.Context) error {
+	return p.ParseListEnd()
+}
+
+func (p *TSimpleJSONProtocol) ReadBool(ctx context.Context) (bool, error) {
+	var value bool
+
+	if err := p.ParsePreValue(); err != nil {
+		return value, err
+	}
+	f, _ := p.reader.Peek(1)
+	if len(f) > 0 {
+		switch f[0] {
+		case JSON_TRUE[0]:
+			b := make([]byte, len(JSON_TRUE))
+			_, err := p.reader.Read(b)
+			if err != nil {
+				return false, NewTProtocolException(err)
+			}
+			if string(b) == string(JSON_TRUE) {
+				value = true
+			} else {
+				e := fmt.Errorf("Expected \"true\" but found: %s", string(b))
+				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			break
+		case JSON_FALSE[0]:
+			b := make([]byte, len(JSON_FALSE))
+			_, err := p.reader.Read(b)
+			if err != nil {
+				return false, NewTProtocolException(err)
+			}
+			if string(b) == string(JSON_FALSE) {
+				value = false
+			} else {
+				e := fmt.Errorf("Expected \"false\" but found: %s", string(b))
+				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			break
+		case JSON_NULL[0]:
+			b := make([]byte, len(JSON_NULL))
+			_, err := p.reader.Read(b)
+			if err != nil {
+				return false, NewTProtocolException(err)
+			}
+			if string(b) == string(JSON_NULL) {
+				value = false
+			} else {
+				e := fmt.Errorf("Expected \"null\" but found: %s", string(b))
+				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		default:
+			e := fmt.Errorf("Expected \"true\", \"false\", or \"null\" but found: %s", string(f))
+			return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	}
+	return value, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ReadByte(ctx context.Context) (int8, error) {
+	v, err := p.ReadI64(ctx)
+	return int8(v), err
+}
+
+func (p *TSimpleJSONProtocol) ReadI16(ctx context.Context) (int16, error) {
+	v, err := p.ReadI64(ctx)
+	return int16(v), err
+}
+
+func (p *TSimpleJSONProtocol) ReadI32(ctx context.Context) (int32, error) {
+	v, err := p.ReadI64(ctx)
+	return int32(v), err
+}
+
+func (p *TSimpleJSONProtocol) ReadI64(ctx context.Context) (int64, error) {
+	v, _, err := p.ParseI64()
+	return v, err
+}
+
+func (p *TSimpleJSONProtocol) ReadDouble(ctx context.Context) (float64, error) {
+	v, _, err := p.ParseF64()
+	return v, err
+}
+
+func (p *TSimpleJSONProtocol) ReadString(ctx context.Context) (string, error) {
+	var v string
+	if err := p.ParsePreValue(); err != nil {
+		return v, err
+	}
+	f, _ := p.reader.Peek(1)
+	if len(f) > 0 && f[0] == JSON_QUOTE {
+		p.reader.ReadByte()
+		value, err := p.ParseStringBody()
+		v = value
+		if err != nil {
+			return v, err
+		}
+	} else if len(f) > 0 && f[0] == JSON_NULL[0] {
+		b := make([]byte, len(JSON_NULL))
+		_, err := p.reader.Read(b)
+		if err != nil {
+			return v, NewTProtocolException(err)
+		}
+		if string(b) != string(JSON_NULL) {
+			e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(b))
+			return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	} else {
+		e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(f))
+		return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return v, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ReadBinary(ctx context.Context) ([]byte, error) {
+	var v []byte
+	if err := p.ParsePreValue(); err != nil {
+		return nil, err
+	}
+	f, _ := p.reader.Peek(1)
+	if len(f) > 0 && f[0] == JSON_QUOTE {
+		p.reader.ReadByte()
+		value, err := p.ParseBase64EncodedBody()
+		v = value
+		if err != nil {
+			return v, err
+		}
+	} else if len(f) > 0 && f[0] == JSON_NULL[0] {
+		b := make([]byte, len(JSON_NULL))
+		_, err := p.reader.Read(b)
+		if err != nil {
+			return v, NewTProtocolException(err)
+		}
+		if string(b) != string(JSON_NULL) {
+			e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(b))
+			return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	} else {
+		e := fmt.Errorf("Expected a JSON string, found unquoted data started with %s", string(f))
+		return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+
+	return v, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) Flush(ctx context.Context) (err error) {
+	return NewTProtocolException(p.writer.Flush())
+}
+
+func (p *TSimpleJSONProtocol) Skip(ctx context.Context, fieldType TType) (err error) {
+	return SkipDefaultDepth(ctx, p, fieldType)
+}
+
+func (p *TSimpleJSONProtocol) Transport() TTransport {
+	return p.trans
+}
+
+func (p *TSimpleJSONProtocol) OutputPreValue() error {
+	cxt, ok := p.dumpContext.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	switch cxt {
+	case _CONTEXT_IN_LIST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+		if _, e := p.write(JSON_COMMA); e != nil {
+			return NewTProtocolException(e)
+		}
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		if _, e := p.write(JSON_COLON); e != nil {
+			return NewTProtocolException(e)
+		}
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputPostValue() error {
+	cxt, ok := p.dumpContext.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	switch cxt {
+	case _CONTEXT_IN_LIST_FIRST:
+		p.dumpContext.pop()
+		p.dumpContext.push(_CONTEXT_IN_LIST)
+	case _CONTEXT_IN_OBJECT_FIRST:
+		p.dumpContext.pop()
+		p.dumpContext.push(_CONTEXT_IN_OBJECT_NEXT_VALUE)
+	case _CONTEXT_IN_OBJECT_NEXT_KEY:
+		p.dumpContext.pop()
+		p.dumpContext.push(_CONTEXT_IN_OBJECT_NEXT_VALUE)
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		p.dumpContext.pop()
+		p.dumpContext.push(_CONTEXT_IN_OBJECT_NEXT_KEY)
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputBool(value bool) error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	var v string
+	if value {
+		v = string(JSON_TRUE)
+	} else {
+		v = string(JSON_FALSE)
+	}
+	cxt, ok := p.dumpContext.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	switch cxt {
+	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+		v = jsonQuote(v)
+	}
+	if e := p.OutputStringData(v); e != nil {
+		return e
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputNull() error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_NULL); e != nil {
+		return NewTProtocolException(e)
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputF64(value float64) error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	var v string
+	if math.IsNaN(value) {
+		v = string(JSON_QUOTE) + JSON_NAN + string(JSON_QUOTE)
+	} else if math.IsInf(value, 1) {
+		v = string(JSON_QUOTE) + JSON_INFINITY + string(JSON_QUOTE)
+	} else if math.IsInf(value, -1) {
+		v = string(JSON_QUOTE) + JSON_NEGATIVE_INFINITY + string(JSON_QUOTE)
+	} else {
+		cxt, ok := p.dumpContext.peek()
+		if !ok {
+			return errEmptyJSONContextStack
+		}
+		v = strconv.FormatFloat(value, 'g', -1, 64)
+		switch cxt {
+		case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+			v = string(JSON_QUOTE) + v + string(JSON_QUOTE)
+		}
+	}
+	if e := p.OutputStringData(v); e != nil {
+		return e
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputI64(value int64) error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	cxt, ok := p.dumpContext.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	v := strconv.FormatInt(value, 10)
+	switch cxt {
+	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+		v = jsonQuote(v)
+	}
+	if e := p.OutputStringData(v); e != nil {
+		return e
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputString(s string) error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if e := p.OutputStringData(jsonQuote(s)); e != nil {
+		return e
+	}
+	return p.OutputPostValue()
+}
+
+func (p *TSimpleJSONProtocol) OutputStringData(s string) error {
+	_, e := p.write([]byte(s))
+	return NewTProtocolException(e)
+}
+
+func (p *TSimpleJSONProtocol) OutputObjectBegin() error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_LBRACE); e != nil {
+		return NewTProtocolException(e)
+	}
+	p.dumpContext.push(_CONTEXT_IN_OBJECT_FIRST)
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputObjectEnd() error {
+	if _, e := p.write(JSON_RBRACE); e != nil {
+		return NewTProtocolException(e)
+	}
+	_, ok := p.dumpContext.pop()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	if e := p.OutputPostValue(); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputListBegin() error {
+	if e := p.OutputPreValue(); e != nil {
+		return e
+	}
+	if _, e := p.write(JSON_LBRACKET); e != nil {
+		return NewTProtocolException(e)
+	}
+	p.dumpContext.push(_CONTEXT_IN_LIST_FIRST)
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputListEnd() error {
+	if _, e := p.write(JSON_RBRACKET); e != nil {
+		return NewTProtocolException(e)
+	}
+	_, ok := p.dumpContext.pop()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	if e := p.OutputPostValue(); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) OutputElemListBegin(elemType TType, size int) error {
+	if e := p.OutputListBegin(); e != nil {
+		return e
+	}
+	if e := p.OutputI64(int64(elemType)); e != nil {
+		return e
+	}
+	if e := p.OutputI64(int64(size)); e != nil {
+		return e
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) ParsePreValue() error {
+	if e := p.readNonSignificantWhitespace(); e != nil {
+		return NewTProtocolException(e)
+	}
+	cxt, ok := p.parseContextStack.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	b, _ := p.reader.Peek(1)
+	switch cxt {
+	case _CONTEXT_IN_LIST:
+		if len(b) > 0 {
+			switch b[0] {
+			case JSON_RBRACKET[0]:
+				return nil
+			case JSON_COMMA[0]:
+				p.reader.ReadByte()
+				if e := p.readNonSignificantWhitespace(); e != nil {
+					return NewTProtocolException(e)
+				}
+				return nil
+			default:
+				e := fmt.Errorf("Expected \"]\" or \",\" in list context, but found \"%s\"", string(b))
+				return NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		}
+	case _CONTEXT_IN_OBJECT_NEXT_KEY:
+		if len(b) > 0 {
+			switch b[0] {
+			case JSON_RBRACE[0]:
+				return nil
+			case JSON_COMMA[0]:
+				p.reader.ReadByte()
+				if e := p.readNonSignificantWhitespace(); e != nil {
+					return NewTProtocolException(e)
+				}
+				return nil
+			default:
+				e := fmt.Errorf("Expected \"}\" or \",\" in object context, but found \"%s\"", string(b))
+				return NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		}
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		if len(b) > 0 {
+			switch b[0] {
+			case JSON_COLON[0]:
+				p.reader.ReadByte()
+				if e := p.readNonSignificantWhitespace(); e != nil {
+					return NewTProtocolException(e)
+				}
+				return nil
+			default:
+				e := fmt.Errorf("Expected \":\" in object context, but found \"%s\"", string(b))
+				return NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		}
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) ParsePostValue() error {
+	if e := p.readNonSignificantWhitespace(); e != nil {
+		return NewTProtocolException(e)
+	}
+	cxt, ok := p.parseContextStack.peek()
+	if !ok {
+		return errEmptyJSONContextStack
+	}
+	switch cxt {
+	case _CONTEXT_IN_LIST_FIRST:
+		p.parseContextStack.pop()
+		p.parseContextStack.push(_CONTEXT_IN_LIST)
+	case _CONTEXT_IN_OBJECT_FIRST, _CONTEXT_IN_OBJECT_NEXT_KEY:
+		p.parseContextStack.pop()
+		p.parseContextStack.push(_CONTEXT_IN_OBJECT_NEXT_VALUE)
+	case _CONTEXT_IN_OBJECT_NEXT_VALUE:
+		p.parseContextStack.pop()
+		p.parseContextStack.push(_CONTEXT_IN_OBJECT_NEXT_KEY)
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) readNonSignificantWhitespace() error {
+	for {
+		b, _ := p.reader.Peek(1)
+		if len(b) < 1 {
+			return nil
+		}
+		switch b[0] {
+		case ' ', '\r', '\n', '\t':
+			p.reader.ReadByte()
+			continue
+		default:
+			break
+		}
+		break
+	}
+	return nil
+}
+
+func (p *TSimpleJSONProtocol) ParseStringBody() (string, error) {
+	line, err := p.reader.ReadString(JSON_QUOTE)
+	if err != nil {
+		return "", NewTProtocolException(err)
+	}
+	l := len(line)
+	// count number of escapes to see if we need to keep going
+	i := 1
+	for ; i < l; i++ {
+		if line[l-i-1] != '\\' {
+			break
+		}
+	}
+	if i&0x01 == 1 {
+		v, ok := jsonUnquote(string(JSON_QUOTE) + line)
+		if !ok {
+			return "", NewTProtocolException(err)
+		}
+		return v, nil
+	}
+	s, err := p.ParseQuotedStringBody()
+	if err != nil {
+		return "", NewTProtocolException(err)
+	}
+	str := string(JSON_QUOTE) + line + s
+	v, ok := jsonUnquote(str)
+	if !ok {
+		e := fmt.Errorf("Unable to parse as JSON string %s", str)
+		return "", NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return v, nil
+}
+
+func (p *TSimpleJSONProtocol) ParseQuotedStringBody() (string, error) {
+	line, err := p.reader.ReadString(JSON_QUOTE)
+	if err != nil {
+		return "", NewTProtocolException(err)
+	}
+	l := len(line)
+	// count number of escapes to see if we need to keep going
+	i := 1
+	for ; i < l; i++ {
+		if line[l-i-1] != '\\' {
+			break
+		}
+	}
+	if i&0x01 == 1 {
+		return line, nil
+	}
+	s, err := p.ParseQuotedStringBody()
+	if err != nil {
+		return "", NewTProtocolException(err)
+	}
+	v := line + s
+	return v, nil
+}
+
+func (p *TSimpleJSONProtocol) ParseBase64EncodedBody() ([]byte, error) {
+	line, err := p.reader.ReadBytes(JSON_QUOTE)
+	if err != nil {
+		return line, NewTProtocolException(err)
+	}
+	line2 := line[0 : len(line)-1]
+	l := len(line2)
+	if (l % 4) != 0 {
+		pad := 4 - (l % 4)
+		fill := [...]byte{'=', '=', '='}
+		line2 = append(line2, fill[:pad]...)
+		l = len(line2)
+	}
+	output := make([]byte, base64.StdEncoding.DecodedLen(l))
+	n, err := base64.StdEncoding.Decode(output, line2)
+	return output[0:n], NewTProtocolException(err)
+}
+
+func (p *TSimpleJSONProtocol) ParseI64() (int64, bool, error) {
+	if err := p.ParsePreValue(); err != nil {
+		return 0, false, err
+	}
+	var value int64
+	var isnull bool
+	if p.safePeekContains(JSON_NULL) {
+		p.reader.Read(make([]byte, len(JSON_NULL)))
+		isnull = true
+	} else {
+		num, err := p.readNumeric()
+		isnull = (num == nil)
+		if !isnull {
+			value = num.Int64()
+		}
+		if err != nil {
+			return value, isnull, err
+		}
+	}
+	return value, isnull, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ParseF64() (float64, bool, error) {
+	if err := p.ParsePreValue(); err != nil {
+		return 0, false, err
+	}
+	var value float64
+	var isnull bool
+	if p.safePeekContains(JSON_NULL) {
+		p.reader.Read(make([]byte, len(JSON_NULL)))
+		isnull = true
+	} else {
+		num, err := p.readNumeric()
+		isnull = (num == nil)
+		if !isnull {
+			value = num.Float64()
+		}
+		if err != nil {
+			return value, isnull, err
+		}
+	}
+	return value, isnull, p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ParseObjectStart() (bool, error) {
+	if err := p.ParsePreValue(); err != nil {
+		return false, err
+	}
+	var b []byte
+	b, err := p.reader.Peek(1)
+	if err != nil {
+		return false, err
+	}
+	if len(b) > 0 && b[0] == JSON_LBRACE[0] {
+		p.reader.ReadByte()
+		p.parseContextStack.push(_CONTEXT_IN_OBJECT_FIRST)
+		return false, nil
+	} else if p.safePeekContains(JSON_NULL) {
+		return true, nil
+	}
+	e := fmt.Errorf("Expected '{' or null, but found '%s'", string(b))
+	return false, NewTProtocolExceptionWithType(INVALID_DATA, e)
+}
+
+func (p *TSimpleJSONProtocol) ParseObjectEnd() error {
+	if isNull, err := p.readIfNull(); isNull || err != nil {
+		return err
+	}
+	cxt, _ := p.parseContextStack.peek()
+	if (cxt != _CONTEXT_IN_OBJECT_FIRST) && (cxt != _CONTEXT_IN_OBJECT_NEXT_KEY) {
+		e := fmt.Errorf("Expected to be in the Object Context, but not in Object Context (%d)", cxt)
+		return NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	line, err := p.reader.ReadString(JSON_RBRACE[0])
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	for _, char := range line {
+		switch char {
+		default:
+			e := fmt.Errorf("Expecting end of object \"}\", but found: \"%s\"", line)
+			return NewTProtocolExceptionWithType(INVALID_DATA, e)
+		case ' ', '\n', '\r', '\t', '}':
+			break
+		}
+	}
+	p.parseContextStack.pop()
+	return p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) ParseListBegin() (isNull bool, err error) {
+	if e := p.ParsePreValue(); e != nil {
+		return false, e
+	}
+	var b []byte
+	b, err = p.reader.Peek(1)
+	if err != nil {
+		return false, err
+	}
+	if len(b) >= 1 && b[0] == JSON_LBRACKET[0] {
+		p.parseContextStack.push(_CONTEXT_IN_LIST_FIRST)
+		p.reader.ReadByte()
+		isNull = false
+	} else if p.safePeekContains(JSON_NULL) {
+		isNull = true
+	} else {
+		err = fmt.Errorf("Expected \"null\" or \"[\", received %q", b)
+	}
+	return isNull, NewTProtocolExceptionWithType(INVALID_DATA, err)
+}
+
+func (p *TSimpleJSONProtocol) ParseElemListBegin() (elemType TType, size int, e error) {
+	if isNull, e := p.ParseListBegin(); isNull || e != nil {
+		return VOID, 0, e
+	}
+	bElemType, _, err := p.ParseI64()
+	elemType = TType(bElemType)
+	if err != nil {
+		return elemType, size, err
+	}
+	nSize, _, err2 := p.ParseI64()
+	size = int(nSize)
+	return elemType, size, err2
+}
+
+func (p *TSimpleJSONProtocol) ParseListEnd() error {
+	if isNull, err := p.readIfNull(); isNull || err != nil {
+		return err
+	}
+	cxt, _ := p.parseContextStack.peek()
+	if cxt != _CONTEXT_IN_LIST {
+		e := fmt.Errorf("Expected to be in the List Context, but not in List Context (%d)", cxt)
+		return NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	line, err := p.reader.ReadString(JSON_RBRACKET[0])
+	if err != nil {
+		return NewTProtocolException(err)
+	}
+	for _, char := range line {
+		switch char {
+		default:
+			e := fmt.Errorf("Expecting end of list \"]\", but found: \"%v\"", line)
+			return NewTProtocolExceptionWithType(INVALID_DATA, e)
+		case ' ', '\n', '\r', '\t', rune(JSON_RBRACKET[0]):
+			break
+		}
+	}
+	p.parseContextStack.pop()
+	if cxt, ok := p.parseContextStack.peek(); !ok {
+		return errEmptyJSONContextStack
+	} else if cxt == _CONTEXT_IN_TOPLEVEL {
+		return nil
+	}
+	return p.ParsePostValue()
+}
+
+func (p *TSimpleJSONProtocol) readSingleValue() (interface{}, TType, error) {
+	e := p.readNonSignificantWhitespace()
+	if e != nil {
+		return nil, VOID, NewTProtocolException(e)
+	}
+	b, e := p.reader.Peek(1)
+	if len(b) > 0 {
+		c := b[0]
+		switch c {
+		case JSON_NULL[0]:
+			buf := make([]byte, len(JSON_NULL))
+			_, e := p.reader.Read(buf)
+			if e != nil {
+				return nil, VOID, NewTProtocolException(e)
+			}
+			if string(JSON_NULL) != string(buf) {
+				e = mismatch(string(JSON_NULL), string(buf))
+				return nil, VOID, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			return nil, VOID, nil
+		case JSON_QUOTE:
+			p.reader.ReadByte()
+			v, e := p.ParseStringBody()
+			if e != nil {
+				return v, UTF8, NewTProtocolException(e)
+			}
+			if v == JSON_INFINITY {
+				return INFINITY, DOUBLE, nil
+			} else if v == JSON_NEGATIVE_INFINITY {
+				return NEGATIVE_INFINITY, DOUBLE, nil
+			} else if v == JSON_NAN {
+				return NAN, DOUBLE, nil
+			}
+			return v, UTF8, nil
+		case JSON_TRUE[0]:
+			buf := make([]byte, len(JSON_TRUE))
+			_, e := p.reader.Read(buf)
+			if e != nil {
+				return true, BOOL, NewTProtocolException(e)
+			}
+			if string(JSON_TRUE) != string(buf) {
+				e := mismatch(string(JSON_TRUE), string(buf))
+				return true, BOOL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			return true, BOOL, nil
+		case JSON_FALSE[0]:
+			buf := make([]byte, len(JSON_FALSE))
+			_, e := p.reader.Read(buf)
+			if e != nil {
+				return false, BOOL, NewTProtocolException(e)
+			}
+			if string(JSON_FALSE) != string(buf) {
+				e := mismatch(string(JSON_FALSE), string(buf))
+				return false, BOOL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			return false, BOOL, nil
+		case JSON_LBRACKET[0]:
+			_, e := p.reader.ReadByte()
+			return make([]interface{}, 0), LIST, NewTProtocolException(e)
+		case JSON_LBRACE[0]:
+			_, e := p.reader.ReadByte()
+			return make(map[string]interface{}), STRUCT, NewTProtocolException(e)
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'e', 'E', '.', '+', '-', JSON_INFINITY[0], JSON_NAN[0]:
+			// assume numeric
+			v, e := p.readNumeric()
+			return v, DOUBLE, e
+		default:
+			e := fmt.Errorf("Expected element in list but found '%s' while parsing JSON.", string(c))
+			return nil, VOID, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	}
+	e = fmt.Errorf("Cannot read a single element while parsing JSON.")
+	return nil, VOID, NewTProtocolExceptionWithType(INVALID_DATA, e)
+
+}
+
+func (p *TSimpleJSONProtocol) readIfNull() (bool, error) {
+	cont := true
+	for cont {
+		b, _ := p.reader.Peek(1)
+		if len(b) < 1 {
+			return false, nil
+		}
+		switch b[0] {
+		default:
+			return false, nil
+		case JSON_NULL[0]:
+			cont = false
+			break
+		case ' ', '\n', '\r', '\t':
+			p.reader.ReadByte()
+			break
+		}
+	}
+	if p.safePeekContains(JSON_NULL) {
+		p.reader.Read(make([]byte, len(JSON_NULL)))
+		return true, nil
+	}
+	return false, nil
+}
+
+func (p *TSimpleJSONProtocol) readQuoteIfNext() {
+	b, _ := p.reader.Peek(1)
+	if len(b) > 0 && b[0] == JSON_QUOTE {
+		p.reader.ReadByte()
+	}
+}
+
+func (p *TSimpleJSONProtocol) readNumeric() (Numeric, error) {
+	isNull, err := p.readIfNull()
+	if isNull || err != nil {
+		return NUMERIC_NULL, err
+	}
+	hasDecimalPoint := false
+	nextCanBeSign := true
+	hasE := false
+	MAX_LEN := 40
+	buf := bytes.NewBuffer(make([]byte, 0, MAX_LEN))
+	continueFor := true
+	inQuotes := false
+	for continueFor {
+		c, err := p.reader.ReadByte()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return NUMERIC_NULL, NewTProtocolException(err)
+		}
+		switch c {
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+			buf.WriteByte(c)
+			nextCanBeSign = false
+		case '.':
+			if hasDecimalPoint {
+				e := fmt.Errorf("Unable to parse number with multiple decimal points '%s.'", buf.String())
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			if hasE {
+				e := fmt.Errorf("Unable to parse number with decimal points in the exponent '%s.'", buf.String())
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			buf.WriteByte(c)
+			hasDecimalPoint, nextCanBeSign = true, false
+		case 'e', 'E':
+			if hasE {
+				e := fmt.Errorf("Unable to parse number with multiple exponents '%s%c'", buf.String(), c)
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			buf.WriteByte(c)
+			hasE, nextCanBeSign = true, true
+		case '-', '+':
+			if !nextCanBeSign {
+				e := fmt.Errorf("Negative sign within number")
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+			buf.WriteByte(c)
+			nextCanBeSign = false
+		case ' ', 0, '\t', '\n', '\r', JSON_RBRACE[0], JSON_RBRACKET[0], JSON_COMMA[0], JSON_COLON[0]:
+			p.reader.UnreadByte()
+			continueFor = false
+		case JSON_NAN[0]:
+			if buf.Len() == 0 {
+				buffer := make([]byte, len(JSON_NAN))
+				buffer[0] = c
+				_, e := p.reader.Read(buffer[1:])
+				if e != nil {
+					return NUMERIC_NULL, NewTProtocolException(e)
+				}
+				if JSON_NAN != string(buffer) {
+					e := mismatch(JSON_NAN, string(buffer))
+					return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+				}
+				if inQuotes {
+					p.readQuoteIfNext()
+				}
+				return NAN, nil
+			} else {
+				e := fmt.Errorf("Unable to parse number starting with character '%c'", c)
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		case JSON_INFINITY[0]:
+			if buf.Len() == 0 || (buf.Len() == 1 && buf.Bytes()[0] == '+') {
+				buffer := make([]byte, len(JSON_INFINITY))
+				buffer[0] = c
+				_, e := p.reader.Read(buffer[1:])
+				if e != nil {
+					return NUMERIC_NULL, NewTProtocolException(e)
+				}
+				if JSON_INFINITY != string(buffer) {
+					e := mismatch(JSON_INFINITY, string(buffer))
+					return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+				}
+				if inQuotes {
+					p.readQuoteIfNext()
+				}
+				return INFINITY, nil
+			} else if buf.Len() == 1 && buf.Bytes()[0] == JSON_NEGATIVE_INFINITY[0] {
+				buffer := make([]byte, len(JSON_NEGATIVE_INFINITY))
+				buffer[0] = JSON_NEGATIVE_INFINITY[0]
+				buffer[1] = c
+				_, e := p.reader.Read(buffer[2:])
+				if e != nil {
+					return NUMERIC_NULL, NewTProtocolException(e)
+				}
+				if JSON_NEGATIVE_INFINITY != string(buffer) {
+					e := mismatch(JSON_NEGATIVE_INFINITY, string(buffer))
+					return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+				}
+				if inQuotes {
+					p.readQuoteIfNext()
+				}
+				return NEGATIVE_INFINITY, nil
+			} else {
+				e := fmt.Errorf("Unable to parse number starting with character '%c' due to existing buffer %s", c, buf.String())
+				return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+			}
+		case JSON_QUOTE:
+			if !inQuotes {
+				inQuotes = true
+			} else {
+				break
+			}
+		default:
+			e := fmt.Errorf("Unable to parse number starting with character '%c'", c)
+			return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+		}
+	}
+	if buf.Len() == 0 {
+		e := fmt.Errorf("Unable to parse number from empty string ''")
+		return NUMERIC_NULL, NewTProtocolExceptionWithType(INVALID_DATA, e)
+	}
+	return NewNumericFromJSONString(buf.String(), false), nil
+}
+
+// Safely peeks into the buffer, reading only what is necessary
+func (p *TSimpleJSONProtocol) safePeekContains(b []byte) bool {
+	for i := 0; i < len(b); i++ {
+		a, _ := p.reader.Peek(i + 1)
+		if len(a) < (i+1) || a[i] != b[i] {
+			return false
+		}
+	}
+	return true
+}
+
+// Reset the context stack to its initial state.
+func (p *TSimpleJSONProtocol) resetContextStack() {
+	p.parseContextStack = jsonContextStack{_CONTEXT_IN_TOPLEVEL}
+	p.dumpContext = jsonContextStack{_CONTEXT_IN_TOPLEVEL}
+}
+
+func (p *TSimpleJSONProtocol) write(b []byte) (int, error) {
+	n, err := p.writer.Write(b)
+	if err != nil {
+		p.writer.Reset(p.trans) // THRIFT-3735
+	}
+	return n, err
+}
+
+// SetTConfiguration implements TConfigurationSetter for propagation.
+func (p *TSimpleJSONProtocol) SetTConfiguration(conf *TConfiguration) {
+	PropagateTConfiguration(p.trans, conf)
+}
+
+var _ TConfigurationSetter = (*TSimpleJSONProtocol)(nil)
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/simple_server.go b/vendor/github.com/uber/jaeger-client-go/thrift/simple_server.go
new file mode 100644
index 0000000..563cbfc
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/simple_server.go
@@ -0,0 +1,332 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"sync"
+	"sync/atomic"
+	"time"
+)
+
+// ErrAbandonRequest is a special error server handler implementations can
+// return to indicate that the request has been abandoned.
+//
+// TSimpleServer will check for this error, and close the client connection
+// instead of writing the response/error back to the client.
+//
+// It shall only be used when the server handler implementation know that the
+// client already abandoned the request (by checking that the passed in context
+// is already canceled, for example).
+var ErrAbandonRequest = errors.New("request abandoned")
+
+// ServerConnectivityCheckInterval defines the ticker interval used by
+// connectivity check in thrift compiled TProcessorFunc implementations.
+//
+// It's defined as a variable instead of constant, so that thrift server
+// implementations can change its value to control the behavior.
+//
+// If it's changed to <=0, the feature will be disabled.
+var ServerConnectivityCheckInterval = time.Millisecond * 5
+
+/*
+ * This is not a typical TSimpleServer as it is not blocked after accept a socket.
+ * It is more like a TThreadedServer that can handle different connections in different goroutines.
+ * This will work if golang user implements a conn-pool like thing in client side.
+ */
+type TSimpleServer struct {
+	closed int32
+	wg     sync.WaitGroup
+	mu     sync.Mutex
+
+	processorFactory       TProcessorFactory
+	serverTransport        TServerTransport
+	inputTransportFactory  TTransportFactory
+	outputTransportFactory TTransportFactory
+	inputProtocolFactory   TProtocolFactory
+	outputProtocolFactory  TProtocolFactory
+
+	// Headers to auto forward in THeaderProtocol
+	forwardHeaders []string
+
+	logger Logger
+}
+
+func NewTSimpleServer2(processor TProcessor, serverTransport TServerTransport) *TSimpleServer {
+	return NewTSimpleServerFactory2(NewTProcessorFactory(processor), serverTransport)
+}
+
+func NewTSimpleServer4(processor TProcessor, serverTransport TServerTransport, transportFactory TTransportFactory, protocolFactory TProtocolFactory) *TSimpleServer {
+	return NewTSimpleServerFactory4(NewTProcessorFactory(processor),
+		serverTransport,
+		transportFactory,
+		protocolFactory,
+	)
+}
+
+func NewTSimpleServer6(processor TProcessor, serverTransport TServerTransport, inputTransportFactory TTransportFactory, outputTransportFactory TTransportFactory, inputProtocolFactory TProtocolFactory, outputProtocolFactory TProtocolFactory) *TSimpleServer {
+	return NewTSimpleServerFactory6(NewTProcessorFactory(processor),
+		serverTransport,
+		inputTransportFactory,
+		outputTransportFactory,
+		inputProtocolFactory,
+		outputProtocolFactory,
+	)
+}
+
+func NewTSimpleServerFactory2(processorFactory TProcessorFactory, serverTransport TServerTransport) *TSimpleServer {
+	return NewTSimpleServerFactory6(processorFactory,
+		serverTransport,
+		NewTTransportFactory(),
+		NewTTransportFactory(),
+		NewTBinaryProtocolFactoryDefault(),
+		NewTBinaryProtocolFactoryDefault(),
+	)
+}
+
+func NewTSimpleServerFactory4(processorFactory TProcessorFactory, serverTransport TServerTransport, transportFactory TTransportFactory, protocolFactory TProtocolFactory) *TSimpleServer {
+	return NewTSimpleServerFactory6(processorFactory,
+		serverTransport,
+		transportFactory,
+		transportFactory,
+		protocolFactory,
+		protocolFactory,
+	)
+}
+
+func NewTSimpleServerFactory6(processorFactory TProcessorFactory, serverTransport TServerTransport, inputTransportFactory TTransportFactory, outputTransportFactory TTransportFactory, inputProtocolFactory TProtocolFactory, outputProtocolFactory TProtocolFactory) *TSimpleServer {
+	return &TSimpleServer{
+		processorFactory:       processorFactory,
+		serverTransport:        serverTransport,
+		inputTransportFactory:  inputTransportFactory,
+		outputTransportFactory: outputTransportFactory,
+		inputProtocolFactory:   inputProtocolFactory,
+		outputProtocolFactory:  outputProtocolFactory,
+	}
+}
+
+func (p *TSimpleServer) ProcessorFactory() TProcessorFactory {
+	return p.processorFactory
+}
+
+func (p *TSimpleServer) ServerTransport() TServerTransport {
+	return p.serverTransport
+}
+
+func (p *TSimpleServer) InputTransportFactory() TTransportFactory {
+	return p.inputTransportFactory
+}
+
+func (p *TSimpleServer) OutputTransportFactory() TTransportFactory {
+	return p.outputTransportFactory
+}
+
+func (p *TSimpleServer) InputProtocolFactory() TProtocolFactory {
+	return p.inputProtocolFactory
+}
+
+func (p *TSimpleServer) OutputProtocolFactory() TProtocolFactory {
+	return p.outputProtocolFactory
+}
+
+func (p *TSimpleServer) Listen() error {
+	return p.serverTransport.Listen()
+}
+
+// SetForwardHeaders sets the list of header keys that will be auto forwarded
+// while using THeaderProtocol.
+//
+// "forward" means that when the server is also a client to other upstream
+// thrift servers, the context object user gets in the processor functions will
+// have both read and write headers set, with write headers being forwarded.
+// Users can always override the write headers by calling SetWriteHeaderList
+// before calling thrift client functions.
+func (p *TSimpleServer) SetForwardHeaders(headers []string) {
+	size := len(headers)
+	if size == 0 {
+		p.forwardHeaders = nil
+		return
+	}
+
+	keys := make([]string, size)
+	copy(keys, headers)
+	p.forwardHeaders = keys
+}
+
+// SetLogger sets the logger used by this TSimpleServer.
+//
+// If no logger was set before Serve is called, a default logger using standard
+// log library will be used.
+func (p *TSimpleServer) SetLogger(logger Logger) {
+	p.logger = logger
+}
+
+func (p *TSimpleServer) innerAccept() (int32, error) {
+	client, err := p.serverTransport.Accept()
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	closed := atomic.LoadInt32(&p.closed)
+	if closed != 0 {
+		return closed, nil
+	}
+	if err != nil {
+		return 0, err
+	}
+	if client != nil {
+		p.wg.Add(1)
+		go func() {
+			defer p.wg.Done()
+			if err := p.processRequests(client); err != nil {
+				p.logger(fmt.Sprintf("error processing request: %v", err))
+			}
+		}()
+	}
+	return 0, nil
+}
+
+func (p *TSimpleServer) AcceptLoop() error {
+	for {
+		closed, err := p.innerAccept()
+		if err != nil {
+			return err
+		}
+		if closed != 0 {
+			return nil
+		}
+	}
+}
+
+func (p *TSimpleServer) Serve() error {
+	p.logger = fallbackLogger(p.logger)
+
+	err := p.Listen()
+	if err != nil {
+		return err
+	}
+	p.AcceptLoop()
+	return nil
+}
+
+func (p *TSimpleServer) Stop() error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if atomic.LoadInt32(&p.closed) != 0 {
+		return nil
+	}
+	atomic.StoreInt32(&p.closed, 1)
+	p.serverTransport.Interrupt()
+	p.wg.Wait()
+	return nil
+}
+
+// If err is actually EOF, return nil, otherwise return err as-is.
+func treatEOFErrorsAsNil(err error) error {
+	if err == nil {
+		return nil
+	}
+	if errors.Is(err, io.EOF) {
+		return nil
+	}
+	var te TTransportException
+	if errors.As(err, &te) && te.TypeId() == END_OF_FILE {
+		return nil
+	}
+	return err
+}
+
+func (p *TSimpleServer) processRequests(client TTransport) (err error) {
+	defer func() {
+		err = treatEOFErrorsAsNil(err)
+	}()
+
+	processor := p.processorFactory.GetProcessor(client)
+	inputTransport, err := p.inputTransportFactory.GetTransport(client)
+	if err != nil {
+		return err
+	}
+	inputProtocol := p.inputProtocolFactory.GetProtocol(inputTransport)
+	var outputTransport TTransport
+	var outputProtocol TProtocol
+
+	// for THeaderProtocol, we must use the same protocol instance for
+	// input and output so that the response is in the same dialect that
+	// the server detected the request was in.
+	headerProtocol, ok := inputProtocol.(*THeaderProtocol)
+	if ok {
+		outputProtocol = inputProtocol
+	} else {
+		oTrans, err := p.outputTransportFactory.GetTransport(client)
+		if err != nil {
+			return err
+		}
+		outputTransport = oTrans
+		outputProtocol = p.outputProtocolFactory.GetProtocol(outputTransport)
+	}
+
+	if inputTransport != nil {
+		defer inputTransport.Close()
+	}
+	if outputTransport != nil {
+		defer outputTransport.Close()
+	}
+	for {
+		if atomic.LoadInt32(&p.closed) != 0 {
+			return nil
+		}
+
+		ctx := SetResponseHelper(
+			defaultCtx,
+			TResponseHelper{
+				THeaderResponseHelper: NewTHeaderResponseHelper(outputProtocol),
+			},
+		)
+		if headerProtocol != nil {
+			// We need to call ReadFrame here, otherwise we won't
+			// get any headers on the AddReadTHeaderToContext call.
+			//
+			// ReadFrame is safe to be called multiple times so it
+			// won't break when it's called again later when we
+			// actually start to read the message.
+			if err := headerProtocol.ReadFrame(ctx); err != nil {
+				return err
+			}
+			ctx = AddReadTHeaderToContext(ctx, headerProtocol.GetReadHeaders())
+			ctx = SetWriteHeaderList(ctx, p.forwardHeaders)
+		}
+
+		ok, err := processor.Process(ctx, inputProtocol, outputProtocol)
+		if errors.Is(err, ErrAbandonRequest) {
+			return client.Close()
+		}
+		if errors.As(err, new(TTransportException)) && err != nil {
+			return err
+		}
+		var tae TApplicationException
+		if errors.As(err, &tae) && tae.TypeId() == UNKNOWN_METHOD {
+			continue
+		}
+		if !ok {
+			break
+		}
+	}
+	return nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/transport.go b/vendor/github.com/uber/jaeger-client-go/thrift/transport.go
new file mode 100644
index 0000000..ba2738a
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/transport.go
@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"context"
+	"errors"
+	"io"
+)
+
+var errTransportInterrupted = errors.New("Transport Interrupted")
+
+type Flusher interface {
+	Flush() (err error)
+}
+
+type ContextFlusher interface {
+	Flush(ctx context.Context) (err error)
+}
+
+type ReadSizeProvider interface {
+	RemainingBytes() (num_bytes uint64)
+}
+
+// Encapsulates the I/O layer
+type TTransport interface {
+	io.ReadWriteCloser
+	ContextFlusher
+	ReadSizeProvider
+
+	// Opens the transport for communication
+	Open() error
+
+	// Returns true if the transport is open
+	IsOpen() bool
+}
+
+type stringWriter interface {
+	WriteString(s string) (n int, err error)
+}
+
+// This is "enchanced" transport with extra capabilities. You need to use one of these
+// to construct protocol.
+// Notably, TSocket does not implement this interface, and it is always a mistake to use
+// TSocket directly in protocol.
+type TRichTransport interface {
+	io.ReadWriter
+	io.ByteReader
+	io.ByteWriter
+	stringWriter
+	ContextFlusher
+	ReadSizeProvider
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/transport_exception.go b/vendor/github.com/uber/jaeger-client-go/thrift/transport_exception.go
new file mode 100644
index 0000000..0a3f076
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/transport_exception.go
@@ -0,0 +1,131 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+import (
+	"errors"
+	"io"
+)
+
+type timeoutable interface {
+	Timeout() bool
+}
+
+// Thrift Transport exception
+type TTransportException interface {
+	TException
+	TypeId() int
+	Err() error
+}
+
+const (
+	UNKNOWN_TRANSPORT_EXCEPTION = 0
+	NOT_OPEN                    = 1
+	ALREADY_OPEN                = 2
+	TIMED_OUT                   = 3
+	END_OF_FILE                 = 4
+)
+
+type tTransportException struct {
+	typeId int
+	err    error
+	msg    string
+}
+
+var _ TTransportException = (*tTransportException)(nil)
+
+func (tTransportException) TExceptionType() TExceptionType {
+	return TExceptionTypeTransport
+}
+
+func (p *tTransportException) TypeId() int {
+	return p.typeId
+}
+
+func (p *tTransportException) Error() string {
+	return p.msg
+}
+
+func (p *tTransportException) Err() error {
+	return p.err
+}
+
+func (p *tTransportException) Unwrap() error {
+	return p.err
+}
+
+func (p *tTransportException) Timeout() bool {
+	return p.typeId == TIMED_OUT
+}
+
+func NewTTransportException(t int, e string) TTransportException {
+	return &tTransportException{
+		typeId: t,
+		err:    errors.New(e),
+		msg:    e,
+	}
+}
+
+func NewTTransportExceptionFromError(e error) TTransportException {
+	if e == nil {
+		return nil
+	}
+
+	if t, ok := e.(TTransportException); ok {
+		return t
+	}
+
+	te := &tTransportException{
+		typeId: UNKNOWN_TRANSPORT_EXCEPTION,
+		err:    e,
+		msg:    e.Error(),
+	}
+
+	if isTimeoutError(e) {
+		te.typeId = TIMED_OUT
+		return te
+	}
+
+	if errors.Is(e, io.EOF) {
+		te.typeId = END_OF_FILE
+		return te
+	}
+
+	return te
+}
+
+func prependTTransportException(prepend string, e TTransportException) TTransportException {
+	return &tTransportException{
+		typeId: e.TypeId(),
+		err:    e,
+		msg:    prepend + e.Error(),
+	}
+}
+
+// isTimeoutError returns true when err is an error caused by timeout.
+//
+// Note that this also includes TTransportException wrapped timeout errors.
+func isTimeoutError(err error) bool {
+	var t timeoutable
+	if errors.As(err, &t) {
+		return t.Timeout()
+	}
+	return false
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/transport_factory.go b/vendor/github.com/uber/jaeger-client-go/thrift/transport_factory.go
new file mode 100644
index 0000000..c805807
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/transport_factory.go
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Factory class used to create wrapped instance of Transports.
+// This is used primarily in servers, which get Transports from
+// a ServerTransport and then may want to mutate them (i.e. create
+// a BufferedTransport from the underlying base transport)
+type TTransportFactory interface {
+	GetTransport(trans TTransport) (TTransport, error)
+}
+
+type tTransportFactory struct{}
+
+// Return a wrapped instance of the base Transport.
+func (p *tTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
+	return trans, nil
+}
+
+func NewTTransportFactory() TTransportFactory {
+	return &tTransportFactory{}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/thrift/type.go b/vendor/github.com/uber/jaeger-client-go/thrift/type.go
new file mode 100644
index 0000000..4292ffc
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/thrift/type.go
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package thrift
+
+// Type constants in the Thrift protocol
+type TType byte
+
+const (
+	STOP   = 0
+	VOID   = 1
+	BOOL   = 2
+	BYTE   = 3
+	I08    = 3
+	DOUBLE = 4
+	I16    = 6
+	I32    = 8
+	I64    = 10
+	STRING = 11
+	UTF7   = 11
+	STRUCT = 12
+	MAP    = 13
+	SET    = 14
+	LIST   = 15
+	UTF8   = 16
+	UTF16  = 17
+	//BINARY = 18   wrong and unusued
+)
+
+var typeNames = map[int]string{
+	STOP:   "STOP",
+	VOID:   "VOID",
+	BOOL:   "BOOL",
+	BYTE:   "BYTE",
+	DOUBLE: "DOUBLE",
+	I16:    "I16",
+	I32:    "I32",
+	I64:    "I64",
+	STRING: "STRING",
+	STRUCT: "STRUCT",
+	MAP:    "MAP",
+	SET:    "SET",
+	LIST:   "LIST",
+	UTF8:   "UTF8",
+	UTF16:  "UTF16",
+}
+
+func (p TType) String() string {
+	if s, ok := typeNames[int(p)]; ok {
+		return s
+	}
+	return "Unknown"
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/tracer.go b/vendor/github.com/uber/jaeger-client-go/tracer.go
new file mode 100644
index 0000000..9a627be
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/tracer.go
@@ -0,0 +1,493 @@
+// Copyright (c) 2017-2018 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"fmt"
+	"io"
+	"math/rand"
+	"os"
+	"reflect"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+
+	"github.com/uber/jaeger-client-go/internal/baggage"
+	"github.com/uber/jaeger-client-go/internal/throttler"
+	"github.com/uber/jaeger-client-go/log"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+// Tracer implements opentracing.Tracer.
+type Tracer struct {
+	serviceName string
+	hostIPv4    uint32 // this is for zipkin endpoint conversion
+
+	sampler  SamplerV2
+	reporter Reporter
+	metrics  Metrics
+	logger   log.DebugLogger
+
+	timeNow      func() time.Time
+	randomNumber func() uint64
+
+	options struct {
+		gen128Bit                   bool // whether to generate 128bit trace IDs
+		zipkinSharedRPCSpan         bool
+		highTraceIDGenerator        func() uint64 // custom high trace ID generator
+		maxTagValueLength           int
+		noDebugFlagOnForcedSampling bool
+		maxLogsPerSpan              int
+		// more options to come
+	}
+	// allocator of Span objects
+	spanAllocator SpanAllocator
+
+	injectors  map[interface{}]Injector
+	extractors map[interface{}]Extractor
+
+	observer compositeObserver
+
+	tags    []Tag
+	process Process
+
+	baggageRestrictionManager baggage.RestrictionManager
+	baggageSetter             *baggageSetter
+
+	debugThrottler throttler.Throttler
+}
+
+// NewTracer creates Tracer implementation that reports tracing to Jaeger.
+// The returned io.Closer can be used in shutdown hooks to ensure that the internal
+// queue of the Reporter is drained and all buffered spans are submitted to collectors.
+// TODO (breaking change) return *Tracer only, without closer.
+func NewTracer(
+	serviceName string,
+	sampler Sampler,
+	reporter Reporter,
+	options ...TracerOption,
+) (opentracing.Tracer, io.Closer) {
+	t := &Tracer{
+		serviceName:   serviceName,
+		sampler:       samplerV1toV2(sampler),
+		reporter:      reporter,
+		injectors:     make(map[interface{}]Injector),
+		extractors:    make(map[interface{}]Extractor),
+		metrics:       *NewNullMetrics(),
+		spanAllocator: simpleSpanAllocator{},
+	}
+
+	for _, option := range options {
+		option(t)
+	}
+
+	// register default injectors/extractors unless they are already provided via options
+	textPropagator := NewTextMapPropagator(getDefaultHeadersConfig(), t.metrics)
+	t.addCodec(opentracing.TextMap, textPropagator, textPropagator)
+
+	httpHeaderPropagator := NewHTTPHeaderPropagator(getDefaultHeadersConfig(), t.metrics)
+	t.addCodec(opentracing.HTTPHeaders, httpHeaderPropagator, httpHeaderPropagator)
+
+	binaryPropagator := NewBinaryPropagator(t)
+	t.addCodec(opentracing.Binary, binaryPropagator, binaryPropagator)
+
+	// TODO remove after TChannel supports OpenTracing
+	interopPropagator := &jaegerTraceContextPropagator{tracer: t}
+	t.addCodec(SpanContextFormat, interopPropagator, interopPropagator)
+
+	zipkinPropagator := &zipkinPropagator{tracer: t}
+	t.addCodec(ZipkinSpanFormat, zipkinPropagator, zipkinPropagator)
+
+	if t.baggageRestrictionManager != nil {
+		t.baggageSetter = newBaggageSetter(t.baggageRestrictionManager, &t.metrics)
+	} else {
+		t.baggageSetter = newBaggageSetter(baggage.NewDefaultRestrictionManager(0), &t.metrics)
+	}
+	if t.debugThrottler == nil {
+		t.debugThrottler = throttler.DefaultThrottler{}
+	}
+
+	if t.randomNumber == nil {
+		seedGenerator := utils.NewRand(time.Now().UnixNano())
+		pool := sync.Pool{
+			New: func() interface{} {
+				return rand.NewSource(seedGenerator.Int63())
+			},
+		}
+
+		t.randomNumber = func() uint64 {
+			generator := pool.Get().(rand.Source)
+			number := uint64(generator.Int63())
+			pool.Put(generator)
+			return number
+		}
+	}
+	if t.timeNow == nil {
+		t.timeNow = time.Now
+	}
+	if t.logger == nil {
+		t.logger = log.NullLogger
+	}
+	// Set tracer-level tags
+	t.tags = append(t.tags, Tag{key: JaegerClientVersionTagKey, value: JaegerClientVersion})
+	if hostname, err := os.Hostname(); err == nil {
+		t.tags = append(t.tags, Tag{key: TracerHostnameTagKey, value: hostname})
+	}
+	if ipval, ok := t.getTag(TracerIPTagKey); ok {
+		ipv4, err := utils.ParseIPToUint32(ipval.(string))
+		if err != nil {
+			t.hostIPv4 = 0
+			t.logger.Error("Unable to convert the externally provided ip to uint32: " + err.Error())
+		} else {
+			t.hostIPv4 = ipv4
+		}
+	} else if ip, err := utils.HostIP(); err == nil {
+		t.tags = append(t.tags, Tag{key: TracerIPTagKey, value: ip.String()})
+		t.hostIPv4 = utils.PackIPAsUint32(ip)
+	} else {
+		t.logger.Error("Unable to determine this host's IP address: " + err.Error())
+	}
+
+	if t.options.gen128Bit {
+		if t.options.highTraceIDGenerator == nil {
+			t.options.highTraceIDGenerator = t.randomNumber
+		}
+	} else if t.options.highTraceIDGenerator != nil {
+		t.logger.Error("Overriding high trace ID generator but not generating " +
+			"128 bit trace IDs, consider enabling the \"Gen128Bit\" option")
+	}
+	if t.options.maxTagValueLength == 0 {
+		t.options.maxTagValueLength = DefaultMaxTagValueLength
+	}
+	t.process = Process{
+		Service: serviceName,
+		UUID:    strconv.FormatUint(t.randomNumber(), 16),
+		Tags:    t.tags,
+	}
+	if throttler, ok := t.debugThrottler.(ProcessSetter); ok {
+		throttler.SetProcess(t.process)
+	}
+
+	return t, t
+}
+
+// addCodec adds registers injector and extractor for given propagation format if not already defined.
+func (t *Tracer) addCodec(format interface{}, injector Injector, extractor Extractor) {
+	if _, ok := t.injectors[format]; !ok {
+		t.injectors[format] = injector
+	}
+	if _, ok := t.extractors[format]; !ok {
+		t.extractors[format] = extractor
+	}
+}
+
+// StartSpan implements StartSpan() method of opentracing.Tracer.
+func (t *Tracer) StartSpan(
+	operationName string,
+	options ...opentracing.StartSpanOption,
+) opentracing.Span {
+	sso := opentracing.StartSpanOptions{}
+	for _, o := range options {
+		o.Apply(&sso)
+	}
+	return t.startSpanWithOptions(operationName, sso)
+}
+
+func (t *Tracer) startSpanWithOptions(
+	operationName string,
+	options opentracing.StartSpanOptions,
+) opentracing.Span {
+	if options.StartTime.IsZero() {
+		options.StartTime = t.timeNow()
+	}
+
+	// Predicate whether the given span context is an empty reference
+	// or may be used as parent / debug ID / baggage items source
+	isEmptyReference := func(ctx SpanContext) bool {
+		return !ctx.IsValid() && !ctx.isDebugIDContainerOnly() && len(ctx.baggage) == 0
+	}
+
+	var references []Reference
+	var parent SpanContext
+	var hasParent bool // need this because `parent` is a value, not reference
+	var ctx SpanContext
+	var isSelfRef bool
+	for _, ref := range options.References {
+		ctxRef, ok := ref.ReferencedContext.(SpanContext)
+		if !ok {
+			t.logger.Error(fmt.Sprintf(
+				"Reference contains invalid type of SpanReference: %s",
+				reflect.ValueOf(ref.ReferencedContext)))
+			continue
+		}
+		if isEmptyReference(ctxRef) {
+			continue
+		}
+
+		if ref.Type == selfRefType {
+			isSelfRef = true
+			ctx = ctxRef
+			continue
+		}
+
+		if ctxRef.IsValid() {
+			// we don't want empty context that contains only debug-id or baggage
+			references = append(references, Reference{Type: ref.Type, Context: ctxRef})
+		}
+
+		if !hasParent {
+			parent = ctxRef
+			hasParent = ref.Type == opentracing.ChildOfRef
+		}
+	}
+	if !hasParent && !isEmptyReference(parent) {
+		// If ChildOfRef wasn't found but a FollowFromRef exists, use the context from
+		// the FollowFromRef as the parent
+		hasParent = true
+	}
+
+	rpcServer := false
+	if v, ok := options.Tags[ext.SpanKindRPCServer.Key]; ok {
+		rpcServer = (v == ext.SpanKindRPCServerEnum || v == string(ext.SpanKindRPCServerEnum))
+	}
+
+	var internalTags []Tag
+	newTrace := false
+	if !isSelfRef {
+		if !hasParent || !parent.IsValid() {
+			newTrace = true
+			ctx.traceID.Low = t.randomID()
+			if t.options.gen128Bit {
+				ctx.traceID.High = t.options.highTraceIDGenerator()
+			}
+			ctx.spanID = SpanID(ctx.traceID.Low)
+			ctx.parentID = 0
+			ctx.samplingState = &samplingState{
+				localRootSpan: ctx.spanID,
+			}
+			if hasParent && parent.isDebugIDContainerOnly() && t.isDebugAllowed(operationName) {
+				ctx.samplingState.setDebugAndSampled()
+				internalTags = append(internalTags, Tag{key: JaegerDebugHeader, value: parent.debugID})
+			}
+		} else {
+			ctx.traceID = parent.traceID
+			if rpcServer && t.options.zipkinSharedRPCSpan {
+				// Support Zipkin's one-span-per-RPC model
+				ctx.spanID = parent.spanID
+				ctx.parentID = parent.parentID
+			} else {
+				ctx.spanID = SpanID(t.randomID())
+				ctx.parentID = parent.spanID
+			}
+			ctx.samplingState = parent.samplingState
+			if parent.remote {
+				ctx.samplingState.setFinal()
+				ctx.samplingState.localRootSpan = ctx.spanID
+			}
+		}
+		if hasParent {
+			// copy baggage items
+			if l := len(parent.baggage); l > 0 {
+				ctx.baggage = make(map[string]string, len(parent.baggage))
+				for k, v := range parent.baggage {
+					ctx.baggage[k] = v
+				}
+			}
+		}
+	}
+
+	sp := t.newSpan()
+	sp.context = ctx
+	sp.tracer = t
+	sp.operationName = operationName
+	sp.startTime = options.StartTime
+	sp.duration = 0
+	sp.references = references
+	sp.firstInProcess = rpcServer || sp.context.parentID == 0
+
+	if !sp.context.isSamplingFinalized() {
+		decision := t.sampler.OnCreateSpan(sp)
+		sp.applySamplingDecision(decision, false)
+	}
+	sp.observer = t.observer.OnStartSpan(sp, operationName, options)
+
+	if tagsTotalLength := len(options.Tags) + len(internalTags); tagsTotalLength > 0 {
+		if sp.tags == nil || cap(sp.tags) < tagsTotalLength {
+			sp.tags = make([]Tag, 0, tagsTotalLength)
+		}
+		sp.tags = append(sp.tags, internalTags...)
+		for k, v := range options.Tags {
+			sp.setTagInternal(k, v, false)
+		}
+	}
+	t.emitNewSpanMetrics(sp, newTrace)
+	return sp
+}
+
+// Inject implements Inject() method of opentracing.Tracer
+func (t *Tracer) Inject(ctx opentracing.SpanContext, format interface{}, carrier interface{}) error {
+	c, ok := ctx.(SpanContext)
+	if !ok {
+		return opentracing.ErrInvalidSpanContext
+	}
+	if injector, ok := t.injectors[format]; ok {
+		return injector.Inject(c, carrier)
+	}
+	return opentracing.ErrUnsupportedFormat
+}
+
+// Extract implements Extract() method of opentracing.Tracer
+func (t *Tracer) Extract(
+	format interface{},
+	carrier interface{},
+) (opentracing.SpanContext, error) {
+	if extractor, ok := t.extractors[format]; ok {
+		spanCtx, err := extractor.Extract(carrier)
+		if err != nil {
+			return nil, err // ensure returned spanCtx is nil
+		}
+		spanCtx.remote = true
+		return spanCtx, nil
+	}
+	return nil, opentracing.ErrUnsupportedFormat
+}
+
+// Close releases all resources used by the Tracer and flushes any remaining buffered spans.
+func (t *Tracer) Close() error {
+	t.logger.Debugf("closing tracer")
+	t.reporter.Close()
+	t.sampler.Close()
+	if mgr, ok := t.baggageRestrictionManager.(io.Closer); ok {
+		_ = mgr.Close()
+	}
+	if throttler, ok := t.debugThrottler.(io.Closer); ok {
+		_ = throttler.Close()
+	}
+	return nil
+}
+
+// Tags returns a slice of tracer-level tags.
+func (t *Tracer) Tags() []opentracing.Tag {
+	tags := make([]opentracing.Tag, len(t.tags))
+	for i, tag := range t.tags {
+		tags[i] = opentracing.Tag{Key: tag.key, Value: tag.value}
+	}
+	return tags
+}
+
+// getTag returns the value of specific tag, if not exists, return nil.
+// TODO only used by tests, move there.
+func (t *Tracer) getTag(key string) (interface{}, bool) {
+	for _, tag := range t.tags {
+		if tag.key == key {
+			return tag.value, true
+		}
+	}
+	return nil, false
+}
+
+// newSpan returns an instance of a clean Span object.
+// If options.PoolSpans is true, the spans are retrieved from an object pool.
+func (t *Tracer) newSpan() *Span {
+	return t.spanAllocator.Get()
+}
+
+// emitNewSpanMetrics generates metrics on the number of started spans and traces.
+// newTrace param: we cannot simply check for parentID==0 because in Zipkin model the
+// server-side RPC span has the exact same trace/span/parent IDs as the
+// calling client-side span, but obviously the server side span is
+// no longer a root span of the trace.
+func (t *Tracer) emitNewSpanMetrics(sp *Span, newTrace bool) {
+	if !sp.context.isSamplingFinalized() {
+		t.metrics.SpansStartedDelayedSampling.Inc(1)
+		if newTrace {
+			t.metrics.TracesStartedDelayedSampling.Inc(1)
+		}
+		// joining a trace is not possible, because sampling decision inherited from upstream is final
+	} else if sp.context.IsSampled() {
+		t.metrics.SpansStartedSampled.Inc(1)
+		if newTrace {
+			t.metrics.TracesStartedSampled.Inc(1)
+		} else if sp.firstInProcess {
+			t.metrics.TracesJoinedSampled.Inc(1)
+		}
+	} else {
+		t.metrics.SpansStartedNotSampled.Inc(1)
+		if newTrace {
+			t.metrics.TracesStartedNotSampled.Inc(1)
+		} else if sp.firstInProcess {
+			t.metrics.TracesJoinedNotSampled.Inc(1)
+		}
+	}
+}
+
+func (t *Tracer) reportSpan(sp *Span) {
+	ctx := sp.SpanContext()
+
+	if !ctx.isSamplingFinalized() {
+		t.metrics.SpansFinishedDelayedSampling.Inc(1)
+	} else if ctx.IsSampled() {
+		t.metrics.SpansFinishedSampled.Inc(1)
+	} else {
+		t.metrics.SpansFinishedNotSampled.Inc(1)
+	}
+
+	// Note: if the reporter is processing Span asynchronously then it needs to Retain() the span,
+	// and then Release() it when no longer needed.
+	// Otherwise, the span may be reused for another trace and its data may be overwritten.
+	if ctx.IsSampled() {
+		t.reporter.Report(sp)
+	}
+
+	sp.Release()
+}
+
+// randomID generates a random trace/span ID, using tracer.random() generator.
+// It never returns 0.
+func (t *Tracer) randomID() uint64 {
+	val := t.randomNumber()
+	for val == 0 {
+		val = t.randomNumber()
+	}
+	return val
+}
+
+// (NB) span must hold the lock before making this call
+func (t *Tracer) setBaggage(sp *Span, key, value string) {
+	t.baggageSetter.setBaggage(sp, key, value)
+}
+
+// (NB) span must hold the lock before making this call
+func (t *Tracer) isDebugAllowed(operation string) bool {
+	return t.debugThrottler.IsAllowed(operation)
+}
+
+// Sampler returns the sampler given to the tracer at creation.
+func (t *Tracer) Sampler() SamplerV2 {
+	return t.sampler
+}
+
+// SelfRef creates an opentracing compliant SpanReference from a jaeger
+// SpanContext. This is a factory function in order to encapsulate jaeger specific
+// types.
+func SelfRef(ctx SpanContext) opentracing.SpanReference {
+	return opentracing.SpanReference{
+		Type:              selfRefType,
+		ReferencedContext: ctx,
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/tracer_options.go b/vendor/github.com/uber/jaeger-client-go/tracer_options.go
new file mode 100644
index 0000000..f0734b7
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/tracer_options.go
@@ -0,0 +1,182 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"time"
+
+	"github.com/opentracing/opentracing-go"
+
+	"github.com/uber/jaeger-client-go/internal/baggage"
+	"github.com/uber/jaeger-client-go/internal/throttler"
+	"github.com/uber/jaeger-client-go/log"
+)
+
+// TracerOption is a function that sets some option on the tracer
+type TracerOption func(tracer *Tracer)
+
+// TracerOptions is a factory for all available TracerOption's
+var TracerOptions tracerOptions
+
+type tracerOptions struct{}
+
+// Metrics creates a TracerOption that initializes Metrics on the tracer,
+// which is used to emit statistics.
+func (tracerOptions) Metrics(m *Metrics) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.metrics = *m
+	}
+}
+
+// Logger creates a TracerOption that gives the tracer a Logger.
+func (tracerOptions) Logger(logger Logger) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.logger = log.DebugLogAdapter(logger)
+	}
+}
+
+func (tracerOptions) CustomHeaderKeys(headerKeys *HeadersConfig) TracerOption {
+	return func(tracer *Tracer) {
+		if headerKeys == nil {
+			return
+		}
+		textPropagator := NewTextMapPropagator(headerKeys.ApplyDefaults(), tracer.metrics)
+		tracer.addCodec(opentracing.TextMap, textPropagator, textPropagator)
+
+		httpHeaderPropagator := NewHTTPHeaderPropagator(headerKeys.ApplyDefaults(), tracer.metrics)
+		tracer.addCodec(opentracing.HTTPHeaders, httpHeaderPropagator, httpHeaderPropagator)
+	}
+}
+
+// TimeNow creates a TracerOption that gives the tracer a function
+// used to generate timestamps for spans.
+func (tracerOptions) TimeNow(timeNow func() time.Time) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.timeNow = timeNow
+	}
+}
+
+// RandomNumber creates a TracerOption that gives the tracer
+// a thread-safe random number generator function for generating trace IDs.
+func (tracerOptions) RandomNumber(randomNumber func() uint64) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.randomNumber = randomNumber
+	}
+}
+
+// PoolSpans creates a TracerOption that tells the tracer whether it should use
+// an object pool to minimize span allocations.
+// This should be used with care, only if the service is not running any async tasks
+// that can access parent spans after those spans have been finished.
+func (tracerOptions) PoolSpans(poolSpans bool) TracerOption {
+	return func(tracer *Tracer) {
+		if poolSpans {
+			tracer.spanAllocator = newSyncPollSpanAllocator()
+		} else {
+			tracer.spanAllocator = simpleSpanAllocator{}
+		}
+	}
+}
+
+// Deprecated: HostIPv4 creates a TracerOption that identifies the current service/process.
+// If not set, the factory method will obtain the current IP address.
+// The TracerOption is deprecated; the tracer will attempt to automatically detect the IP.
+func (tracerOptions) HostIPv4(hostIPv4 uint32) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.hostIPv4 = hostIPv4
+	}
+}
+
+func (tracerOptions) Injector(format interface{}, injector Injector) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.injectors[format] = injector
+	}
+}
+
+func (tracerOptions) Extractor(format interface{}, extractor Extractor) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.extractors[format] = extractor
+	}
+}
+
+func (t tracerOptions) Observer(observer Observer) TracerOption {
+	return t.ContribObserver(&oldObserver{obs: observer})
+}
+
+func (tracerOptions) ContribObserver(observer ContribObserver) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.observer.append(observer)
+	}
+}
+
+func (tracerOptions) Gen128Bit(gen128Bit bool) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.gen128Bit = gen128Bit
+	}
+}
+
+func (tracerOptions) NoDebugFlagOnForcedSampling(noDebugFlagOnForcedSampling bool) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.noDebugFlagOnForcedSampling = noDebugFlagOnForcedSampling
+	}
+}
+
+func (tracerOptions) HighTraceIDGenerator(highTraceIDGenerator func() uint64) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.highTraceIDGenerator = highTraceIDGenerator
+	}
+}
+
+func (tracerOptions) MaxTagValueLength(maxTagValueLength int) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.maxTagValueLength = maxTagValueLength
+	}
+}
+
+// MaxLogsPerSpan limits the number of Logs in a span (if set to a nonzero
+// value). If a span has more logs than this value, logs are dropped as
+// necessary (and replaced with a log describing how many were dropped).
+//
+// About half of the MaxLogsPerSpan logs kept are the oldest logs, and about
+// half are the newest logs.
+func (tracerOptions) MaxLogsPerSpan(maxLogsPerSpan int) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.maxLogsPerSpan = maxLogsPerSpan
+	}
+}
+
+func (tracerOptions) ZipkinSharedRPCSpan(zipkinSharedRPCSpan bool) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.options.zipkinSharedRPCSpan = zipkinSharedRPCSpan
+	}
+}
+
+func (tracerOptions) Tag(key string, value interface{}) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.tags = append(tracer.tags, Tag{key: key, value: value})
+	}
+}
+
+func (tracerOptions) BaggageRestrictionManager(mgr baggage.RestrictionManager) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.baggageRestrictionManager = mgr
+	}
+}
+
+func (tracerOptions) DebugThrottler(throttler throttler.Throttler) TracerOption {
+	return func(tracer *Tracer) {
+		tracer.debugThrottler = throttler
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/transport.go b/vendor/github.com/uber/jaeger-client-go/transport.go
new file mode 100644
index 0000000..c5f5b19
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/transport.go
@@ -0,0 +1,38 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"io"
+)
+
+// Transport abstracts the method of sending spans out of process.
+// Implementations are NOT required to be thread-safe; the RemoteReporter
+// is expected to only call methods on the Transport from the same go-routine.
+type Transport interface {
+	// Append converts the span to the wire representation and adds it
+	// to sender's internal buffer.  If the buffer exceeds its designated
+	// size, the transport should call Flush() and return the number of spans
+	// flushed, otherwise return 0. If error is returned, the returned number
+	// of spans is treated as failed span, and reported to metrics accordingly.
+	Append(span *Span) (int, error)
+
+	// Flush submits the internal buffer to the remote server. It returns the
+	// number of spans flushed. If error is returned, the returned number of
+	// spans is treated as failed span, and reported to metrics accordingly.
+	Flush() (int, error)
+
+	io.Closer
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/transport/doc.go b/vendor/github.com/uber/jaeger-client-go/transport/doc.go
new file mode 100644
index 0000000..6b961fb
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/transport/doc.go
@@ -0,0 +1,23 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package transport defines various transports that can be used with
+// RemoteReporter to send spans out of process. Transport is responsible
+// for serializing the spans into a specific format suitable for sending
+// to the tracing backend. Examples may include Thrift over UDP, Thrift
+// or JSON over HTTP, Thrift over Kafka, etc.
+//
+// Implementations are NOT required to be thread-safe; the RemoteReporter
+// is expected to only call methods on the Transport from the same go-routine.
+package transport
diff --git a/vendor/github.com/uber/jaeger-client-go/transport/http.go b/vendor/github.com/uber/jaeger-client-go/transport/http.go
new file mode 100644
index 0000000..1d6f14d
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/transport/http.go
@@ -0,0 +1,175 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package transport
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	"github.com/uber/jaeger-client-go/thrift"
+
+	"github.com/uber/jaeger-client-go"
+	j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+)
+
+// Default timeout for http request in seconds
+const defaultHTTPTimeout = time.Second * 5
+
+// HTTPTransport implements Transport by forwarding spans to a http server.
+type HTTPTransport struct {
+	url             string
+	client          *http.Client
+	batchSize       int
+	spans           []*j.Span
+	process         *j.Process
+	httpCredentials *HTTPBasicAuthCredentials
+	headers         map[string]string
+}
+
+// HTTPBasicAuthCredentials stores credentials for HTTP basic auth.
+type HTTPBasicAuthCredentials struct {
+	username string
+	password string
+}
+
+// HTTPOption sets a parameter for the HttpCollector
+type HTTPOption func(c *HTTPTransport)
+
+// HTTPTimeout sets maximum timeout for http request.
+func HTTPTimeout(duration time.Duration) HTTPOption {
+	return func(c *HTTPTransport) { c.client.Timeout = duration }
+}
+
+// HTTPBatchSize sets the maximum batch size, after which a collect will be
+// triggered. The default batch size is 100 spans.
+func HTTPBatchSize(n int) HTTPOption {
+	return func(c *HTTPTransport) { c.batchSize = n }
+}
+
+// HTTPBasicAuth sets the credentials required to perform HTTP basic auth
+func HTTPBasicAuth(username string, password string) HTTPOption {
+	return func(c *HTTPTransport) {
+		c.httpCredentials = &HTTPBasicAuthCredentials{username: username, password: password}
+	}
+}
+
+// HTTPRoundTripper configures the underlying Transport on the *http.Client
+// that is used
+func HTTPRoundTripper(transport http.RoundTripper) HTTPOption {
+	return func(c *HTTPTransport) {
+		c.client.Transport = transport
+	}
+}
+
+// HTTPHeaders defines the HTTP headers that will be attached to the jaeger client's HTTP request
+func HTTPHeaders(headers map[string]string) HTTPOption {
+	return func(c *HTTPTransport) {
+		c.headers = headers
+	}
+}
+
+// NewHTTPTransport returns a new HTTP-backend transport. url should be an http
+// url of the collector to handle POST request, typically something like:
+//     http://hostname:14268/api/traces?format=jaeger.thrift
+func NewHTTPTransport(url string, options ...HTTPOption) *HTTPTransport {
+	c := &HTTPTransport{
+		url:       url,
+		client:    &http.Client{Timeout: defaultHTTPTimeout},
+		batchSize: 100,
+		spans:     []*j.Span{},
+	}
+
+	for _, option := range options {
+		option(c)
+	}
+	return c
+}
+
+// Append implements Transport.
+func (c *HTTPTransport) Append(span *jaeger.Span) (int, error) {
+	if c.process == nil {
+		c.process = jaeger.BuildJaegerProcessThrift(span)
+	}
+	jSpan := jaeger.BuildJaegerThrift(span)
+	c.spans = append(c.spans, jSpan)
+	if len(c.spans) >= c.batchSize {
+		return c.Flush()
+	}
+	return 0, nil
+}
+
+// Flush implements Transport.
+func (c *HTTPTransport) Flush() (int, error) {
+	count := len(c.spans)
+	if count == 0 {
+		return 0, nil
+	}
+	err := c.send(c.spans)
+	c.spans = c.spans[:0]
+	return count, err
+}
+
+// Close implements Transport.
+func (c *HTTPTransport) Close() error {
+	return nil
+}
+
+func (c *HTTPTransport) send(spans []*j.Span) error {
+	batch := &j.Batch{
+		Spans:   spans,
+		Process: c.process,
+	}
+	body, err := serializeThrift(batch)
+	if err != nil {
+		return err
+	}
+	req, err := http.NewRequest("POST", c.url, body)
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/x-thrift")
+	for k, v := range c.headers {
+		req.Header.Set(k, v)
+	}
+
+	if c.httpCredentials != nil {
+		req.SetBasicAuth(c.httpCredentials.username, c.httpCredentials.password)
+	}
+
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return err
+	}
+	io.Copy(ioutil.Discard, resp.Body)
+	resp.Body.Close()
+	if resp.StatusCode >= http.StatusBadRequest {
+		return fmt.Errorf("error from collector: %d", resp.StatusCode)
+	}
+	return nil
+}
+
+func serializeThrift(obj thrift.TStruct) (*bytes.Buffer, error) {
+	t := thrift.NewTMemoryBuffer()
+	p := thrift.NewTBinaryProtocolTransport(t)
+	if err := obj.Write(context.Background(), p); err != nil {
+		return nil, err
+	}
+	return t.Buffer, nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/transport_udp.go b/vendor/github.com/uber/jaeger-client-go/transport_udp.go
new file mode 100644
index 0000000..0000412
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/transport_udp.go
@@ -0,0 +1,194 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/uber/jaeger-client-go/internal/reporterstats"
+	"github.com/uber/jaeger-client-go/log"
+	"github.com/uber/jaeger-client-go/thrift"
+	j "github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+// Empirically obtained constant for how many bytes in the message are used for envelope.
+// The total datagram size is:
+// sizeof(Span) * numSpans + processByteSize + emitBatchOverhead <= maxPacketSize
+//
+// Note that due to the use of Compact Thrift protocol, overhead grows with the number of spans
+// in the batch, because the length of the list is encoded as varint32, as well as SeqId.
+//
+// There is a unit test `TestEmitBatchOverhead` that validates this number, it fails at <68.
+const emitBatchOverhead = 70
+
+var errSpanTooLarge = errors.New("span is too large")
+
+type udpSender struct {
+	client          *utils.AgentClientUDP
+	maxPacketSize   int                   // max size of datagram in bytes
+	maxSpanBytes    int                   // max number of bytes to record spans (excluding envelope) in the datagram
+	byteBufferSize  int                   // current number of span bytes accumulated in the buffer
+	spanBuffer      []*j.Span             // spans buffered before a flush
+	thriftBuffer    *thrift.TMemoryBuffer // buffer used to calculate byte size of a span
+	thriftProtocol  thrift.TProtocol
+	process         *j.Process
+	processByteSize int
+
+	// reporterStats provides access to stats that are only known to Reporter
+	reporterStats reporterstats.ReporterStats
+
+	// The following counters are always non-negative, but we need to send them in signed i64 Thrift fields,
+	// so we keep them as signed. At 10k QPS, overflow happens in about 300 million years.
+	batchSeqNo           int64
+	tooLargeDroppedSpans int64
+	failedToEmitSpans    int64
+}
+
+// UDPTransportParams allows specifying options for initializing a UDPTransport. An instance of this struct should
+// be passed to NewUDPTransportWithParams.
+type UDPTransportParams struct {
+	utils.AgentClientUDPParams
+}
+
+// NewUDPTransportWithParams creates a reporter that submits spans to jaeger-agent.
+// TODO: (breaking change) move to transport/ package.
+func NewUDPTransportWithParams(params UDPTransportParams) (Transport, error) {
+	if len(params.HostPort) == 0 {
+		params.HostPort = fmt.Sprintf("%s:%d", DefaultUDPSpanServerHost, DefaultUDPSpanServerPort)
+	}
+
+	if params.Logger == nil {
+		params.Logger = log.StdLogger
+	}
+
+	if params.MaxPacketSize == 0 {
+		params.MaxPacketSize = utils.UDPPacketMaxLength
+	}
+
+	protocolFactory := thrift.NewTCompactProtocolFactory()
+
+	// Each span is first written to thriftBuffer to determine its size in bytes.
+	thriftBuffer := thrift.NewTMemoryBufferLen(params.MaxPacketSize)
+	thriftProtocol := protocolFactory.GetProtocol(thriftBuffer)
+
+	client, err := utils.NewAgentClientUDPWithParams(params.AgentClientUDPParams)
+	if err != nil {
+		return nil, err
+	}
+
+	return &udpSender{
+		client:         client,
+		maxSpanBytes:   params.MaxPacketSize - emitBatchOverhead,
+		thriftBuffer:   thriftBuffer,
+		thriftProtocol: thriftProtocol,
+	}, nil
+}
+
+// NewUDPTransport creates a reporter that submits spans to jaeger-agent.
+// TODO: (breaking change) move to transport/ package.
+func NewUDPTransport(hostPort string, maxPacketSize int) (Transport, error) {
+	return NewUDPTransportWithParams(UDPTransportParams{
+		AgentClientUDPParams: utils.AgentClientUDPParams{
+			HostPort:      hostPort,
+			MaxPacketSize: maxPacketSize,
+		},
+	})
+}
+
+// SetReporterStats implements reporterstats.Receiver.
+func (s *udpSender) SetReporterStats(rs reporterstats.ReporterStats) {
+	s.reporterStats = rs
+}
+
+func (s *udpSender) calcSizeOfSerializedThrift(thriftStruct thrift.TStruct) int {
+	s.thriftBuffer.Reset()
+	_ = thriftStruct.Write(context.Background(), s.thriftProtocol)
+	return s.thriftBuffer.Len()
+}
+
+func (s *udpSender) Append(span *Span) (int, error) {
+	if s.process == nil {
+		s.process = BuildJaegerProcessThrift(span)
+		s.processByteSize = s.calcSizeOfSerializedThrift(s.process)
+		s.byteBufferSize += s.processByteSize
+	}
+	jSpan := BuildJaegerThrift(span)
+	spanSize := s.calcSizeOfSerializedThrift(jSpan)
+	if spanSize > s.maxSpanBytes {
+		s.tooLargeDroppedSpans++
+		return 1, errSpanTooLarge
+	}
+
+	s.byteBufferSize += spanSize
+	if s.byteBufferSize <= s.maxSpanBytes {
+		s.spanBuffer = append(s.spanBuffer, jSpan)
+		if s.byteBufferSize < s.maxSpanBytes {
+			return 0, nil
+		}
+		return s.Flush()
+	}
+	// the latest span did not fit in the buffer
+	n, err := s.Flush()
+	s.spanBuffer = append(s.spanBuffer, jSpan)
+	s.byteBufferSize = spanSize + s.processByteSize
+	return n, err
+}
+
+func (s *udpSender) Flush() (int, error) {
+	n := len(s.spanBuffer)
+	if n == 0 {
+		return 0, nil
+	}
+	s.batchSeqNo++
+	batchSeqNo := int64(s.batchSeqNo)
+	err := s.client.EmitBatch(context.Background(), &j.Batch{
+		Process: s.process,
+		Spans:   s.spanBuffer,
+		SeqNo:   &batchSeqNo,
+		Stats:   s.makeStats(),
+	})
+	s.resetBuffers()
+	if err != nil {
+		s.failedToEmitSpans += int64(n)
+	}
+	return n, err
+}
+
+func (s *udpSender) Close() error {
+	return s.client.Close()
+}
+
+func (s *udpSender) resetBuffers() {
+	for i := range s.spanBuffer {
+		s.spanBuffer[i] = nil
+	}
+	s.spanBuffer = s.spanBuffer[:0]
+	s.byteBufferSize = s.processByteSize
+}
+
+func (s *udpSender) makeStats() *j.ClientStats {
+	var dropped int64
+	if s.reporterStats != nil {
+		dropped = s.reporterStats.SpansDroppedFromQueue()
+	}
+	return &j.ClientStats{
+		FullQueueDroppedSpans: dropped,
+		TooLargeDroppedSpans:  s.tooLargeDroppedSpans,
+		FailedToEmitSpans:     s.failedToEmitSpans,
+	}
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/http_json.go b/vendor/github.com/uber/jaeger-client-go/utils/http_json.go
new file mode 100644
index 0000000..237211f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/http_json.go
@@ -0,0 +1,54 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+)
+
+// GetJSON makes an HTTP call to the specified URL and parses the returned JSON into `out`.
+func GetJSON(url string, out interface{}) error {
+	resp, err := http.Get(url)
+	if err != nil {
+		return err
+	}
+	return ReadJSON(resp, out)
+}
+
+// ReadJSON reads JSON from http.Response and parses it into `out`
+func ReadJSON(resp *http.Response, out interface{}) error {
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 400 {
+		body, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return err
+		}
+
+		return fmt.Errorf("StatusCode: %d, Body: %s", resp.StatusCode, body)
+	}
+
+	if out == nil {
+		io.Copy(ioutil.Discard, resp.Body)
+		return nil
+	}
+
+	decoder := json.NewDecoder(resp.Body)
+	return decoder.Decode(out)
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/localip.go b/vendor/github.com/uber/jaeger-client-go/utils/localip.go
new file mode 100644
index 0000000..b51af77
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/localip.go
@@ -0,0 +1,84 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"errors"
+	"net"
+)
+
+// This code is borrowed from https://github.com/uber/tchannel-go/blob/dev/localip.go
+
+// scoreAddr scores how likely the given addr is to be a remote address and returns the
+// IP to use when listening. Any address which receives a negative score should not be used.
+// Scores are calculated as:
+// -1 for any unknown IP addresses.
+// +300 for IPv4 addresses
+// +100 for non-local addresses, extra +100 for "up" interaces.
+func scoreAddr(iface net.Interface, addr net.Addr) (int, net.IP) {
+	var ip net.IP
+	if netAddr, ok := addr.(*net.IPNet); ok {
+		ip = netAddr.IP
+	} else if netIP, ok := addr.(*net.IPAddr); ok {
+		ip = netIP.IP
+	} else {
+		return -1, nil
+	}
+
+	var score int
+	if ip.To4() != nil {
+		score += 300
+	}
+	if iface.Flags&net.FlagLoopback == 0 && !ip.IsLoopback() {
+		score += 100
+		if iface.Flags&net.FlagUp != 0 {
+			score += 100
+		}
+	}
+	return score, ip
+}
+
+// HostIP tries to find an IP that can be used by other machines to reach this machine.
+func HostIP() (net.IP, error) {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return nil, err
+	}
+
+	bestScore := -1
+	var bestIP net.IP
+	// Select the highest scoring IP as the best IP.
+	for _, iface := range interfaces {
+		addrs, err := iface.Addrs()
+		if err != nil {
+			// Skip this interface if there is an error.
+			continue
+		}
+
+		for _, addr := range addrs {
+			score, ip := scoreAddr(iface, addr)
+			if score > bestScore {
+				bestScore = score
+				bestIP = ip
+			}
+		}
+	}
+
+	if bestScore == -1 {
+		return nil, errors.New("no addresses to listen on")
+	}
+
+	return bestIP, nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/rand.go b/vendor/github.com/uber/jaeger-client-go/utils/rand.go
new file mode 100644
index 0000000..9875f7f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/rand.go
@@ -0,0 +1,46 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"math/rand"
+	"sync"
+)
+
+// lockedSource allows a random number generator to be used by multiple goroutines concurrently.
+// The code is very similar to math/rand.lockedSource, which is unfortunately not exposed.
+type lockedSource struct {
+	mut sync.Mutex
+	src rand.Source
+}
+
+// NewRand returns a rand.Rand that is threadsafe.
+func NewRand(seed int64) *rand.Rand {
+	return rand.New(&lockedSource{src: rand.NewSource(seed)})
+}
+
+func (r *lockedSource) Int63() (n int64) {
+	r.mut.Lock()
+	n = r.src.Int63()
+	r.mut.Unlock()
+	return
+}
+
+// Seed implements Seed() of Source
+func (r *lockedSource) Seed(seed int64) {
+	r.mut.Lock()
+	r.src.Seed(seed)
+	r.mut.Unlock()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/rate_limiter.go b/vendor/github.com/uber/jaeger-client-go/utils/rate_limiter.go
new file mode 100644
index 0000000..bf2f131
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/rate_limiter.go
@@ -0,0 +1,112 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"sync"
+	"time"
+)
+
+// RateLimiter is a filter used to check if a message that is worth itemCost units is within the rate limits.
+//
+// TODO (breaking change) remove this interface in favor of public struct below
+//
+// Deprecated, use ReconfigurableRateLimiter.
+type RateLimiter interface {
+	CheckCredit(itemCost float64) bool
+}
+
+// ReconfigurableRateLimiter is a rate limiter based on leaky bucket algorithm, formulated in terms of a
+// credits balance that is replenished every time CheckCredit() method is called (tick) by the amount proportional
+// to the time elapsed since the last tick, up to max of creditsPerSecond. A call to CheckCredit() takes a cost
+// of an item we want to pay with the balance. If the balance exceeds the cost of the item, the item is "purchased"
+// and the balance reduced, indicated by returned value of true. Otherwise the balance is unchanged and return false.
+//
+// This can be used to limit a rate of messages emitted by a service by instantiating the Rate Limiter with the
+// max number of messages a service is allowed to emit per second, and calling CheckCredit(1.0) for each message
+// to determine if the message is within the rate limit.
+//
+// It can also be used to limit the rate of traffic in bytes, by setting creditsPerSecond to desired throughput
+// as bytes/second, and calling CheckCredit() with the actual message size.
+//
+// TODO (breaking change) rename to RateLimiter once the interface is removed
+type ReconfigurableRateLimiter struct {
+	lock sync.Mutex
+
+	creditsPerSecond float64
+	balance          float64
+	maxBalance       float64
+	lastTick         time.Time
+
+	timeNow func() time.Time
+}
+
+// NewRateLimiter creates a new ReconfigurableRateLimiter.
+func NewRateLimiter(creditsPerSecond, maxBalance float64) *ReconfigurableRateLimiter {
+	return &ReconfigurableRateLimiter{
+		creditsPerSecond: creditsPerSecond,
+		balance:          maxBalance,
+		maxBalance:       maxBalance,
+		lastTick:         time.Now(),
+		timeNow:          time.Now,
+	}
+}
+
+// CheckCredit tries to reduce the current balance by itemCost provided that the current balance
+// is not lest than itemCost.
+func (rl *ReconfigurableRateLimiter) CheckCredit(itemCost float64) bool {
+	rl.lock.Lock()
+	defer rl.lock.Unlock()
+
+	// if we have enough credits to pay for current item, then reduce balance and allow
+	if rl.balance >= itemCost {
+		rl.balance -= itemCost
+		return true
+	}
+	// otherwise check if balance can be increased due to time elapsed, and try again
+	rl.updateBalance()
+	if rl.balance >= itemCost {
+		rl.balance -= itemCost
+		return true
+	}
+	return false
+}
+
+// updateBalance recalculates current balance based on time elapsed. Must be called while holding a lock.
+func (rl *ReconfigurableRateLimiter) updateBalance() {
+	// calculate how much time passed since the last tick, and update current tick
+	currentTime := rl.timeNow()
+	elapsedTime := currentTime.Sub(rl.lastTick)
+	rl.lastTick = currentTime
+	// calculate how much credit have we accumulated since the last tick
+	rl.balance += elapsedTime.Seconds() * rl.creditsPerSecond
+	if rl.balance > rl.maxBalance {
+		rl.balance = rl.maxBalance
+	}
+}
+
+// Update changes the main parameters of the rate limiter in-place, while retaining
+// the current accumulated balance (pro-rated to the new maxBalance value). Using this method
+// instead of creating a new rate limiter helps to avoid thundering herd when sampling
+// strategies are updated.
+func (rl *ReconfigurableRateLimiter) Update(creditsPerSecond, maxBalance float64) {
+	rl.lock.Lock()
+	defer rl.lock.Unlock()
+
+	rl.updateBalance() // get up to date balance
+	rl.balance = rl.balance * maxBalance / rl.maxBalance
+	rl.creditsPerSecond = creditsPerSecond
+	rl.maxBalance = maxBalance
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/reconnecting_udp_conn.go b/vendor/github.com/uber/jaeger-client-go/utils/reconnecting_udp_conn.go
new file mode 100644
index 0000000..0dffc7f
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/reconnecting_udp_conn.go
@@ -0,0 +1,189 @@
+// Copyright (c) 2020 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"fmt"
+	"net"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/uber/jaeger-client-go/log"
+)
+
+// reconnectingUDPConn is an implementation of udpConn that resolves hostPort every resolveTimeout, if the resolved address is
+// different than the current conn then the new address is dialed and the conn is swapped.
+type reconnectingUDPConn struct {
+	hostPort    string
+	resolveFunc resolveFunc
+	dialFunc    dialFunc
+	logger      log.Logger
+	bufferBytes int64
+
+	connMtx   sync.RWMutex
+	conn      *net.UDPConn
+	destAddr  *net.UDPAddr
+	closeChan chan struct{}
+}
+
+type resolveFunc func(network string, hostPort string) (*net.UDPAddr, error)
+type dialFunc func(network string, laddr, raddr *net.UDPAddr) (*net.UDPConn, error)
+
+// newReconnectingUDPConn returns a new udpConn that resolves hostPort every resolveTimeout, if the resolved address is
+// different than the current conn then the new address is dialed and the conn is swapped.
+func newReconnectingUDPConn(hostPort string, resolveTimeout time.Duration, resolveFunc resolveFunc, dialFunc dialFunc, logger log.Logger) (*reconnectingUDPConn, error) {
+	conn := &reconnectingUDPConn{
+		hostPort:    hostPort,
+		resolveFunc: resolveFunc,
+		dialFunc:    dialFunc,
+		logger:      logger,
+		closeChan:   make(chan struct{}),
+	}
+
+	if err := conn.attemptResolveAndDial(); err != nil {
+		logger.Error(fmt.Sprintf("failed resolving destination address on connection startup, with err: %q. retrying in %s", err.Error(), resolveTimeout))
+	}
+
+	go conn.reconnectLoop(resolveTimeout)
+
+	return conn, nil
+}
+
+func (c *reconnectingUDPConn) reconnectLoop(resolveTimeout time.Duration) {
+	ticker := time.NewTicker(resolveTimeout)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-c.closeChan:
+			return
+		case <-ticker.C:
+			if err := c.attemptResolveAndDial(); err != nil {
+				c.logger.Error(err.Error())
+			}
+		}
+	}
+}
+
+func (c *reconnectingUDPConn) attemptResolveAndDial() error {
+	newAddr, err := c.resolveFunc("udp", c.hostPort)
+	if err != nil {
+		return fmt.Errorf("failed to resolve new addr for host %q, with err: %w", c.hostPort, err)
+	}
+
+	c.connMtx.RLock()
+	curAddr := c.destAddr
+	c.connMtx.RUnlock()
+
+	// dont attempt dial if an addr was successfully dialed previously and, resolved addr is the same as current conn
+	if curAddr != nil && newAddr.String() == curAddr.String() {
+		return nil
+	}
+
+	if err := c.attemptDialNewAddr(newAddr); err != nil {
+		return fmt.Errorf("failed to dial newly resolved addr '%s', with err: %w", newAddr, err)
+	}
+
+	return nil
+}
+
+func (c *reconnectingUDPConn) attemptDialNewAddr(newAddr *net.UDPAddr) error {
+	connUDP, err := c.dialFunc(newAddr.Network(), nil, newAddr)
+	if err != nil {
+		return err
+	}
+
+	if bufferBytes := int(atomic.LoadInt64(&c.bufferBytes)); bufferBytes != 0 {
+		if err = connUDP.SetWriteBuffer(bufferBytes); err != nil {
+			return err
+		}
+	}
+
+	c.connMtx.Lock()
+	c.destAddr = newAddr
+	// store prev to close later
+	prevConn := c.conn
+	c.conn = connUDP
+	c.connMtx.Unlock()
+
+	if prevConn != nil {
+		return prevConn.Close()
+	}
+
+	return nil
+}
+
+// Write calls net.udpConn.Write, if it fails an attempt is made to connect to a new addr, if that succeeds the write is retried before returning
+func (c *reconnectingUDPConn) Write(b []byte) (int, error) {
+	var bytesWritten int
+	var err error
+
+	c.connMtx.RLock()
+	if c.conn == nil {
+		// if connection is not initialized indicate this with err in order to hook into retry logic
+		err = fmt.Errorf("UDP connection not yet initialized, an address has not been resolved")
+	} else {
+		bytesWritten, err = c.conn.Write(b)
+	}
+	c.connMtx.RUnlock()
+
+	if err == nil {
+		return bytesWritten, nil
+	}
+
+	// attempt to resolve and dial new address in case that's the problem, if resolve and dial succeeds, try write again
+	if reconnErr := c.attemptResolveAndDial(); reconnErr == nil {
+		c.connMtx.RLock()
+		defer c.connMtx.RUnlock()
+		return c.conn.Write(b)
+	}
+
+	// return original error if reconn fails
+	return bytesWritten, err
+}
+
+// Close stops the reconnectLoop, then closes the connection via net.udpConn 's implementation
+func (c *reconnectingUDPConn) Close() error {
+	close(c.closeChan)
+
+	// acquire rw lock before closing conn to ensure calls to Write drain
+	c.connMtx.Lock()
+	defer c.connMtx.Unlock()
+
+	if c.conn != nil {
+		return c.conn.Close()
+	}
+
+	return nil
+}
+
+// SetWriteBuffer defers to the net.udpConn SetWriteBuffer implementation wrapped with a RLock. if no conn is currently held
+// and SetWriteBuffer is called store bufferBytes to be set for new conns
+func (c *reconnectingUDPConn) SetWriteBuffer(bytes int) error {
+	var err error
+
+	c.connMtx.RLock()
+	if c.conn != nil {
+		err = c.conn.SetWriteBuffer(bytes)
+	}
+	c.connMtx.RUnlock()
+
+	if err == nil {
+		atomic.StoreInt64(&c.bufferBytes, int64(bytes))
+	}
+
+	return err
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/udp_client.go b/vendor/github.com/uber/jaeger-client-go/utils/udp_client.go
new file mode 100644
index 0000000..4c59ae9
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/udp_client.go
@@ -0,0 +1,149 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"time"
+
+	"github.com/uber/jaeger-client-go/log"
+	"github.com/uber/jaeger-client-go/thrift"
+
+	"github.com/uber/jaeger-client-go/thrift-gen/agent"
+	"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
+	"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+)
+
+// UDPPacketMaxLength is the max size of UDP packet we want to send, synced with jaeger-agent
+const UDPPacketMaxLength = 65000
+
+// AgentClientUDP is a UDP client to Jaeger agent that implements agent.Agent interface.
+type AgentClientUDP struct {
+	agent.Agent
+	io.Closer
+
+	connUDP       udpConn
+	client        *agent.AgentClient
+	maxPacketSize int                   // max size of datagram in bytes
+	thriftBuffer  *thrift.TMemoryBuffer // buffer used to calculate byte size of a span
+}
+
+type udpConn interface {
+	Write([]byte) (int, error)
+	SetWriteBuffer(int) error
+	Close() error
+}
+
+// AgentClientUDPParams allows specifying options for initializing an AgentClientUDP. An instance of this struct should
+// be passed to NewAgentClientUDPWithParams.
+type AgentClientUDPParams struct {
+	HostPort                   string
+	MaxPacketSize              int
+	Logger                     log.Logger
+	DisableAttemptReconnecting bool
+	AttemptReconnectInterval   time.Duration
+}
+
+// NewAgentClientUDPWithParams creates a client that sends spans to Jaeger Agent over UDP.
+func NewAgentClientUDPWithParams(params AgentClientUDPParams) (*AgentClientUDP, error) {
+	// validate hostport
+	if _, _, err := net.SplitHostPort(params.HostPort); err != nil {
+		return nil, err
+	}
+
+	if params.MaxPacketSize == 0 {
+		params.MaxPacketSize = UDPPacketMaxLength
+	}
+
+	if params.Logger == nil {
+		params.Logger = log.StdLogger
+	}
+
+	if !params.DisableAttemptReconnecting && params.AttemptReconnectInterval == 0 {
+		params.AttemptReconnectInterval = time.Second * 30
+	}
+
+	thriftBuffer := thrift.NewTMemoryBufferLen(params.MaxPacketSize)
+	protocolFactory := thrift.NewTCompactProtocolFactory()
+	client := agent.NewAgentClientFactory(thriftBuffer, protocolFactory)
+
+	var connUDP udpConn
+	var err error
+
+	if params.DisableAttemptReconnecting {
+		destAddr, err := net.ResolveUDPAddr("udp", params.HostPort)
+		if err != nil {
+			return nil, err
+		}
+
+		connUDP, err = net.DialUDP(destAddr.Network(), nil, destAddr)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		// host is hostname, setup resolver loop in case host record changes during operation
+		connUDP, err = newReconnectingUDPConn(params.HostPort, params.AttemptReconnectInterval, net.ResolveUDPAddr, net.DialUDP, params.Logger)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if err := connUDP.SetWriteBuffer(params.MaxPacketSize); err != nil {
+		return nil, err
+	}
+
+	return &AgentClientUDP{
+		connUDP:       connUDP,
+		client:        client,
+		maxPacketSize: params.MaxPacketSize,
+		thriftBuffer:  thriftBuffer,
+	}, nil
+}
+
+// NewAgentClientUDP creates a client that sends spans to Jaeger Agent over UDP.
+func NewAgentClientUDP(hostPort string, maxPacketSize int) (*AgentClientUDP, error) {
+	return NewAgentClientUDPWithParams(AgentClientUDPParams{
+		HostPort:      hostPort,
+		MaxPacketSize: maxPacketSize,
+	})
+}
+
+// EmitZipkinBatch implements EmitZipkinBatch() of Agent interface
+func (a *AgentClientUDP) EmitZipkinBatch(context.Context, []*zipkincore.Span) error {
+	return errors.New("Not implemented")
+}
+
+// EmitBatch implements EmitBatch() of Agent interface
+func (a *AgentClientUDP) EmitBatch(ctx context.Context, batch *jaeger.Batch) error {
+	a.thriftBuffer.Reset()
+	if err := a.client.EmitBatch(ctx, batch); err != nil {
+		return err
+	}
+	if a.thriftBuffer.Len() > a.maxPacketSize {
+		return fmt.Errorf("data does not fit within one UDP packet; size %d, max %d, spans %d",
+			a.thriftBuffer.Len(), a.maxPacketSize, len(batch.Spans))
+	}
+	_, err := a.connUDP.Write(a.thriftBuffer.Bytes())
+	return err
+}
+
+// Close implements Close() of io.Closer and closes the underlying UDP connection.
+func (a *AgentClientUDP) Close() error {
+	return a.connUDP.Close()
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/utils/utils.go b/vendor/github.com/uber/jaeger-client-go/utils/utils.go
new file mode 100644
index 0000000..ac3c325
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/utils/utils.go
@@ -0,0 +1,87 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"encoding/binary"
+	"errors"
+	"net"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	// ErrEmptyIP an error for empty ip strings
+	ErrEmptyIP = errors.New("empty string given for ip")
+
+	// ErrNotHostColonPort an error for invalid host port string
+	ErrNotHostColonPort = errors.New("expecting host:port")
+
+	// ErrNotFourOctets an error for the wrong number of octets after splitting a string
+	ErrNotFourOctets = errors.New("Wrong number of octets")
+)
+
+// ParseIPToUint32 converts a string ip (e.g. "x.y.z.w") to an uint32
+func ParseIPToUint32(ip string) (uint32, error) {
+	if ip == "" {
+		return 0, ErrEmptyIP
+	}
+
+	if ip == "localhost" {
+		return 127<<24 | 1, nil
+	}
+
+	octets := strings.Split(ip, ".")
+	if len(octets) != 4 {
+		return 0, ErrNotFourOctets
+	}
+
+	var intIP uint32
+	for i := 0; i < 4; i++ {
+		octet, err := strconv.Atoi(octets[i])
+		if err != nil {
+			return 0, err
+		}
+		intIP = (intIP << 8) | uint32(octet)
+	}
+
+	return intIP, nil
+}
+
+// ParsePort converts port number from string to uin16
+func ParsePort(portString string) (uint16, error) {
+	port, err := strconv.ParseUint(portString, 10, 16)
+	return uint16(port), err
+}
+
+// PackIPAsUint32 packs an IPv4 as uint32
+func PackIPAsUint32(ip net.IP) uint32 {
+	if ipv4 := ip.To4(); ipv4 != nil {
+		return binary.BigEndian.Uint32(ipv4)
+	}
+	return 0
+}
+
+// TimeToMicrosecondsSinceEpochInt64 converts Go time.Time to a long
+// representing time since epoch in microseconds, which is used expected
+// in the Jaeger spans encoded as Thrift.
+func TimeToMicrosecondsSinceEpochInt64(t time.Time) int64 {
+	// ^^^ Passing time.Time by value is faster than passing a pointer!
+	// BenchmarkTimeByValue-8	2000000000	         1.37 ns/op
+	// BenchmarkTimeByPtr-8  	2000000000	         1.98 ns/op
+
+	return t.UnixNano() / 1000
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/zipkin.go b/vendor/github.com/uber/jaeger-client-go/zipkin.go
new file mode 100644
index 0000000..98cab4b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/zipkin.go
@@ -0,0 +1,77 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"github.com/opentracing/opentracing-go"
+)
+
+// ZipkinSpanFormat is an OpenTracing carrier format constant
+const ZipkinSpanFormat = "zipkin-span-format"
+
+// ExtractableZipkinSpan is a type of Carrier used for integration with Zipkin-aware
+// RPC frameworks (like TChannel). It does not support baggage, only trace IDs.
+type ExtractableZipkinSpan interface {
+	TraceID() uint64
+	SpanID() uint64
+	ParentID() uint64
+	Flags() byte
+}
+
+// InjectableZipkinSpan is a type of Carrier used for integration with Zipkin-aware
+// RPC frameworks (like TChannel). It does not support baggage, only trace IDs.
+type InjectableZipkinSpan interface {
+	SetTraceID(traceID uint64)
+	SetSpanID(spanID uint64)
+	SetParentID(parentID uint64)
+	SetFlags(flags byte)
+}
+
+type zipkinPropagator struct {
+	tracer *Tracer
+}
+
+func (p *zipkinPropagator) Inject(
+	ctx SpanContext,
+	abstractCarrier interface{},
+) error {
+	carrier, ok := abstractCarrier.(InjectableZipkinSpan)
+	if !ok {
+		return opentracing.ErrInvalidCarrier
+	}
+
+	carrier.SetTraceID(ctx.TraceID().Low) // TODO this cannot work with 128bit IDs
+	carrier.SetSpanID(uint64(ctx.SpanID()))
+	carrier.SetParentID(uint64(ctx.ParentID()))
+	carrier.SetFlags(ctx.samplingState.flags())
+	return nil
+}
+
+func (p *zipkinPropagator) Extract(abstractCarrier interface{}) (SpanContext, error) {
+	carrier, ok := abstractCarrier.(ExtractableZipkinSpan)
+	if !ok {
+		return emptyContext, opentracing.ErrInvalidCarrier
+	}
+	if carrier.TraceID() == 0 {
+		return emptyContext, opentracing.ErrSpanContextNotFound
+	}
+	var ctx SpanContext
+	ctx.traceID.Low = carrier.TraceID()
+	ctx.spanID = SpanID(carrier.SpanID())
+	ctx.parentID = SpanID(carrier.ParentID())
+	ctx.samplingState = &samplingState{}
+	ctx.samplingState.setFlags(carrier.Flags())
+	return ctx, nil
+}
diff --git a/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go b/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go
new file mode 100644
index 0000000..73aeb00
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/zipkin_thrift_span.go
@@ -0,0 +1,329 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jaeger
+
+import (
+	"encoding/binary"
+	"fmt"
+	"time"
+
+	"github.com/opentracing/opentracing-go/ext"
+
+	"github.com/uber/jaeger-client-go/internal/spanlog"
+	z "github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
+	"github.com/uber/jaeger-client-go/utils"
+)
+
+const (
+	// Zipkin UI does not work well with non-string tag values
+	allowPackedNumbers = false
+)
+
+var specialTagHandlers = map[string]func(*zipkinSpan, interface{}){
+	string(ext.SpanKind):     setSpanKind,
+	string(ext.PeerHostIPv4): setPeerIPv4,
+	string(ext.PeerPort):     setPeerPort,
+	string(ext.PeerService):  setPeerService,
+	TracerIPTagKey:           removeTag,
+}
+
+// BuildZipkinThrift builds thrift span based on internal span.
+// TODO: (breaking change) move to transport/zipkin and make private.
+func BuildZipkinThrift(s *Span) *z.Span {
+	span := &zipkinSpan{Span: s}
+	span.handleSpecialTags()
+	parentID := int64(span.context.parentID)
+	var ptrParentID *int64
+	if parentID != 0 {
+		ptrParentID = &parentID
+	}
+	traceIDHigh := int64(span.context.traceID.High)
+	var ptrTraceIDHigh *int64
+	if traceIDHigh != 0 {
+		ptrTraceIDHigh = &traceIDHigh
+	}
+	timestamp := utils.TimeToMicrosecondsSinceEpochInt64(span.startTime)
+	duration := span.duration.Nanoseconds() / int64(time.Microsecond)
+	endpoint := &z.Endpoint{
+		ServiceName: span.tracer.serviceName,
+		Ipv4:        int32(span.tracer.hostIPv4)}
+	thriftSpan := &z.Span{
+		TraceID:           int64(span.context.traceID.Low),
+		TraceIDHigh:       ptrTraceIDHigh,
+		ID:                int64(span.context.spanID),
+		ParentID:          ptrParentID,
+		Name:              span.operationName,
+		Timestamp:         &timestamp,
+		Duration:          &duration,
+		Debug:             span.context.IsDebug(),
+		Annotations:       buildAnnotations(span, endpoint),
+		BinaryAnnotations: buildBinaryAnnotations(span, endpoint)}
+	return thriftSpan
+}
+
+func buildAnnotations(span *zipkinSpan, endpoint *z.Endpoint) []*z.Annotation {
+	// automatically adding 2 Zipkin CoreAnnotations
+	annotations := make([]*z.Annotation, 0, 2+len(span.logs))
+	var startLabel, endLabel string
+	if span.spanKind == string(ext.SpanKindRPCClientEnum) {
+		startLabel, endLabel = z.CLIENT_SEND, z.CLIENT_RECV
+	} else if span.spanKind == string(ext.SpanKindRPCServerEnum) {
+		startLabel, endLabel = z.SERVER_RECV, z.SERVER_SEND
+	}
+	if !span.startTime.IsZero() && startLabel != "" {
+		start := &z.Annotation{
+			Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(span.startTime),
+			Value:     startLabel,
+			Host:      endpoint}
+		annotations = append(annotations, start)
+		if span.duration != 0 {
+			endTs := span.startTime.Add(span.duration)
+			end := &z.Annotation{
+				Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(endTs),
+				Value:     endLabel,
+				Host:      endpoint}
+			annotations = append(annotations, end)
+		}
+	}
+	for _, log := range span.logs {
+		anno := &z.Annotation{
+			Timestamp: utils.TimeToMicrosecondsSinceEpochInt64(log.Timestamp),
+			Host:      endpoint}
+		if content, err := spanlog.MaterializeWithJSON(log.Fields); err == nil {
+			anno.Value = truncateString(string(content), span.tracer.options.maxTagValueLength)
+		} else {
+			anno.Value = err.Error()
+		}
+		annotations = append(annotations, anno)
+	}
+	return annotations
+}
+
+func buildBinaryAnnotations(span *zipkinSpan, endpoint *z.Endpoint) []*z.BinaryAnnotation {
+	// automatically adding local component or server/client address tag, and client version
+	annotations := make([]*z.BinaryAnnotation, 0, 2+len(span.tags))
+
+	if span.peerDefined() && span.isRPC() {
+		peer := z.Endpoint{
+			Ipv4:        span.peer.Ipv4,
+			Port:        span.peer.Port,
+			ServiceName: span.peer.ServiceName}
+		label := z.CLIENT_ADDR
+		if span.isRPCClient() {
+			label = z.SERVER_ADDR
+		}
+		anno := &z.BinaryAnnotation{
+			Key:            label,
+			Value:          []byte{1},
+			AnnotationType: z.AnnotationType_BOOL,
+			Host:           &peer}
+		annotations = append(annotations, anno)
+	}
+	if !span.isRPC() {
+		componentName := endpoint.ServiceName
+		for _, tag := range span.tags {
+			if tag.key == string(ext.Component) {
+				componentName = stringify(tag.value)
+				break
+			}
+		}
+		local := &z.BinaryAnnotation{
+			Key:            z.LOCAL_COMPONENT,
+			Value:          []byte(componentName),
+			AnnotationType: z.AnnotationType_STRING,
+			Host:           endpoint}
+		annotations = append(annotations, local)
+	}
+	for _, tag := range span.tags {
+		// "Special tags" are already handled by this point, we'd be double reporting the
+		// tags if we don't skip here
+		if _, ok := specialTagHandlers[tag.key]; ok {
+			continue
+		}
+		if anno := buildBinaryAnnotation(tag.key, tag.value, span.tracer.options.maxTagValueLength, nil); anno != nil {
+			annotations = append(annotations, anno)
+		}
+	}
+	return annotations
+}
+
+func buildBinaryAnnotation(key string, val interface{}, maxTagValueLength int, endpoint *z.Endpoint) *z.BinaryAnnotation {
+	bann := &z.BinaryAnnotation{Key: key, Host: endpoint}
+	if value, ok := val.(string); ok {
+		bann.Value = []byte(truncateString(value, maxTagValueLength))
+		bann.AnnotationType = z.AnnotationType_STRING
+	} else if value, ok := val.([]byte); ok {
+		if len(value) > maxTagValueLength {
+			value = value[:maxTagValueLength]
+		}
+		bann.Value = value
+		bann.AnnotationType = z.AnnotationType_BYTES
+	} else if value, ok := val.(int32); ok && allowPackedNumbers {
+		bann.Value = int32ToBytes(value)
+		bann.AnnotationType = z.AnnotationType_I32
+	} else if value, ok := val.(int64); ok && allowPackedNumbers {
+		bann.Value = int64ToBytes(value)
+		bann.AnnotationType = z.AnnotationType_I64
+	} else if value, ok := val.(int); ok && allowPackedNumbers {
+		bann.Value = int64ToBytes(int64(value))
+		bann.AnnotationType = z.AnnotationType_I64
+	} else if value, ok := val.(bool); ok {
+		bann.Value = []byte{boolToByte(value)}
+		bann.AnnotationType = z.AnnotationType_BOOL
+	} else {
+		value := stringify(val)
+		bann.Value = []byte(truncateString(value, maxTagValueLength))
+		bann.AnnotationType = z.AnnotationType_STRING
+	}
+	return bann
+}
+
+func stringify(value interface{}) string {
+	if s, ok := value.(string); ok {
+		return s
+	}
+	return fmt.Sprintf("%+v", value)
+}
+
+func truncateString(value string, maxLength int) string {
+	// we ignore the problem of utf8 runes possibly being sliced in the middle,
+	// as it is rather expensive to iterate through each tag just to find rune
+	// boundaries.
+	if len(value) > maxLength {
+		return value[:maxLength]
+	}
+	return value
+}
+
+func boolToByte(b bool) byte {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+// int32ToBytes converts int32 to bytes.
+func int32ToBytes(i int32) []byte {
+	buf := make([]byte, 4)
+	binary.BigEndian.PutUint32(buf, uint32(i))
+	return buf
+}
+
+// int64ToBytes converts int64 to bytes.
+func int64ToBytes(i int64) []byte {
+	buf := make([]byte, 8)
+	binary.BigEndian.PutUint64(buf, uint64(i))
+	return buf
+}
+
+type zipkinSpan struct {
+	*Span
+
+	// peer points to the peer service participating in this span,
+	// e.g. the Client if this span is a server span,
+	// or Server if this span is a client span
+	peer struct {
+		Ipv4        int32
+		Port        int16
+		ServiceName string
+	}
+
+	// used to distinguish local vs. RPC Server vs. RPC Client spans
+	spanKind string
+}
+
+func (s *zipkinSpan) handleSpecialTags() {
+	s.Lock()
+	defer s.Unlock()
+	if s.firstInProcess {
+		// append the process tags
+		s.tags = append(s.tags, s.tracer.tags...)
+	}
+	filteredTags := make([]Tag, 0, len(s.tags))
+	for _, tag := range s.tags {
+		if handler, ok := specialTagHandlers[tag.key]; ok {
+			handler(s, tag.value)
+		} else {
+			filteredTags = append(filteredTags, tag)
+		}
+	}
+	s.tags = filteredTags
+}
+
+func setSpanKind(s *zipkinSpan, value interface{}) {
+	if val, ok := value.(string); ok {
+		s.spanKind = val
+		return
+	}
+	if val, ok := value.(ext.SpanKindEnum); ok {
+		s.spanKind = string(val)
+	}
+}
+
+func setPeerIPv4(s *zipkinSpan, value interface{}) {
+	if val, ok := value.(string); ok {
+		if ip, err := utils.ParseIPToUint32(val); err == nil {
+			s.peer.Ipv4 = int32(ip)
+			return
+		}
+	}
+	if val, ok := value.(uint32); ok {
+		s.peer.Ipv4 = int32(val)
+		return
+	}
+	if val, ok := value.(int32); ok {
+		s.peer.Ipv4 = val
+	}
+}
+
+func setPeerPort(s *zipkinSpan, value interface{}) {
+	if val, ok := value.(string); ok {
+		if port, err := utils.ParsePort(val); err == nil {
+			s.peer.Port = int16(port)
+			return
+		}
+	}
+	if val, ok := value.(uint16); ok {
+		s.peer.Port = int16(val)
+		return
+	}
+	if val, ok := value.(int); ok {
+		s.peer.Port = int16(val)
+	}
+}
+
+func setPeerService(s *zipkinSpan, value interface{}) {
+	if val, ok := value.(string); ok {
+		s.peer.ServiceName = val
+	}
+}
+
+func removeTag(s *zipkinSpan, value interface{}) {}
+
+func (s *zipkinSpan) peerDefined() bool {
+	return s.peer.ServiceName != "" || s.peer.Ipv4 != 0 || s.peer.Port != 0
+}
+
+func (s *zipkinSpan) isRPC() bool {
+	s.RLock()
+	defer s.RUnlock()
+	return s.spanKind == string(ext.SpanKindRPCClientEnum) || s.spanKind == string(ext.SpanKindRPCServerEnum)
+}
+
+func (s *zipkinSpan) isRPCClient() bool {
+	s.RLock()
+	defer s.RUnlock()
+	return s.spanKind == string(ext.SpanKindRPCClientEnum)
+}