Dependencies for the affinity router and the
affinity routing daemon.
Change-Id: Icda72c3594ef7f8f0bc0c33dc03087a4c25529ca
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
new file mode 100644
index 0000000..c198e6a
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
@@ -0,0 +1,202 @@
+# Created by .ignore support plugin (hsz.mobi)
+### Go template
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+### Windows template
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+### Kate template
+# Swap Files #
+.*.kate-swp
+.swp.*
+### SublimeText template
+# cache files for sublime text
+*.tmlanguage.cache
+*.tmPreferences.cache
+*.stTheme.cache
+
+# workspace files are user-specific
+*.sublime-workspace
+
+# project files should be checked into the repository, unless a significant
+# proportion of contributors will probably not be using SublimeText
+# *.sublime-project
+
+# sftp configuration file
+sftp-config.json
+### Linux template
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+.idea
+.idea/tasks.xml
+.idea/dictionaries
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
+
+# Sensitive or high-churn files:
+.idea/dataSources.ids
+.idea/dataSources.xml
+.idea/dataSources.local.xml
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+
+# Gradle:
+.idea/gradle.xml
+.idea/libraries
+
+# Mongo Explorer plugin:
+.idea/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+### Xcode template
+# Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## Build generated
+build/
+DerivedData/
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+
+## Other
+*.moved-aside
+*.xccheckout
+*.xcscmblueprint
+### Eclipse template
+
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.settings/
+.loadpath
+.recommenders
+
+# Eclipse Core
+.project
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# PyDev specific (Python IDE for Eclipse)
+*.pydevproject
+
+# CDT-specific (C/C++ Development Tooling)
+.cproject
+
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+# Java annotation processor (APT)
+.factorypath
+
+# PDT-specific (PHP Development Tools)
+.buildpath
+
+# sbteclipse plugin
+.target
+
+# Tern plugin
+.tern-project
+
+# TeXlipse plugin
+.texlipse
+
+# STS (Spring Tool Suite)
+.springBeans
+
+# Code Recommenders
+.recommenders/
+
+
+coverage.txt
+
+#vendor
+vendor/
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml
new file mode 100644
index 0000000..2fc21dd
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.travis.yml
@@ -0,0 +1,22 @@
+sudo: false
+language: go
+go:
+ - 1.8.x
+env:
+ - DEP_VERSION="0.3.2"
+
+before_install:
+ # Download the binary to bin folder in $GOPATH
+ - curl -L -s https://github.com/golang/dep/releases/download/v${DEP_VERSION}/dep-linux-amd64 -o $GOPATH/bin/dep
+ # Make the binary executable
+ - chmod +x $GOPATH/bin/dep
+
+install:
+ - dep ensure
+
+script:
+ - make checkdocs
+ - make test
+
+after_success:
+ - bash <(curl -s https://codecov.io/bash)
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CONTRIBUTING.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CONTRIBUTING.md
new file mode 100644
index 0000000..dd52ab8
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/CONTRIBUTING.md
@@ -0,0 +1,20 @@
+# Contributing
+
+We would love to have people submit pull requests and help make `grpc-ecosystem/go-grpc-middleware` even better 👍.
+
+Fork, then clone the repo:
+
+```bash
+git clone git@github.com:your-username/go-grpc-middleware.git
+```
+
+Before checking in please run the following:
+
+```bash
+make all
+```
+
+This will `vet`, `fmt`, regenerate documentation and run all tests.
+
+
+Push to your fork and open a pull request.
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/DOC.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/DOC.md
new file mode 100644
index 0000000..511d953
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/DOC.md
@@ -0,0 +1,166 @@
+# grpc_middleware
+`import "github.com/grpc-ecosystem/go-grpc-middleware"`
+
+* [Overview](#pkg-overview)
+* [Imported Packages](#pkg-imports)
+* [Index](#pkg-index)
+
+## <a name="pkg-overview">Overview</a>
+`grpc_middleware` is a collection of gRPC middleware packages: interceptors, helpers and tools.
+
+### Middleware
+gRPC is a fantastic RPC middleware, which sees a lot of adoption in the Golang world. However, the
+upstream gRPC codebase is relatively bare bones.
+
+This package, and most of its child packages provides commonly needed middleware for gRPC:
+client-side interceptors for retires, server-side interceptors for input validation and auth,
+functions for chaining said interceptors, metadata convenience methods and more.
+
+### Chaining
+By default, gRPC doesn't allow one to have more than one interceptor either on the client nor on
+the server side. `grpc_middleware` provides convenient chaining methods
+
+Simple way of turning a multiple interceptors into a single interceptor. Here's an example for
+server chaining:
+
+ myServer := grpc.NewServer(
+ grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(loggingStream, monitoringStream, authStream)),
+ grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(loggingUnary, monitoringUnary, authUnary),
+ )
+
+These interceptors will be executed from left to right: logging, monitoring and auth.
+
+Here's an example for client side chaining:
+
+ clientConn, err = grpc.Dial(
+ address,
+ grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(monitoringClientUnary, retryUnary)),
+ grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(monitoringClientStream, retryStream)),
+ )
+ client = pb_testproto.NewTestServiceClient(clientConn)
+ resp, err := client.PingEmpty(s.ctx, &myservice.Request{Msg: "hello"})
+
+These interceptors will be executed from left to right: monitoring and then retry logic.
+
+The retry interceptor will call every interceptor that follows it whenever when a retry happens.
+
+### Writing Your Own
+Implementing your own interceptor is pretty trivial: there are interfaces for that. But the interesting
+bit exposing common data to handlers (and other middleware), similarly to HTTP Middleware design.
+For example, you may want to pass the identity of the caller from the auth interceptor all the way
+to the handling function.
+
+For example, a client side interceptor example for auth looks like:
+
+ func FakeAuthUnaryInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+ newCtx := context.WithValue(ctx, "user_id", "john@example.com")
+ return handler(newCtx, req)
+ }
+
+Unfortunately, it's not as easy for streaming RPCs. These have the `context.Context` embedded within
+the `grpc.ServerStream` object. To pass values through context, a wrapper (`WrappedServerStream`) is
+needed. For example:
+
+ func FakeAuthStreamingInterceptor(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+ newStream := grpc_middleware.WrapServerStream(stream)
+ newStream.WrappedContext = context.WithValue(ctx, "user_id", "john@example.com")
+ return handler(srv, stream)
+ }
+
+## <a name="pkg-imports">Imported Packages</a>
+
+- [golang.org/x/net/context](https://godoc.org/golang.org/x/net/context)
+- [google.golang.org/grpc](https://godoc.org/google.golang.org/grpc)
+
+## <a name="pkg-index">Index</a>
+* [func ChainStreamClient(interceptors ...grpc.StreamClientInterceptor) grpc.StreamClientInterceptor](#ChainStreamClient)
+* [func ChainStreamServer(interceptors ...grpc.StreamServerInterceptor) grpc.StreamServerInterceptor](#ChainStreamServer)
+* [func ChainUnaryClient(interceptors ...grpc.UnaryClientInterceptor) grpc.UnaryClientInterceptor](#ChainUnaryClient)
+* [func ChainUnaryServer(interceptors ...grpc.UnaryServerInterceptor) grpc.UnaryServerInterceptor](#ChainUnaryServer)
+* [func WithStreamServerChain(interceptors ...grpc.StreamServerInterceptor) grpc.ServerOption](#WithStreamServerChain)
+* [func WithUnaryServerChain(interceptors ...grpc.UnaryServerInterceptor) grpc.ServerOption](#WithUnaryServerChain)
+* [type WrappedServerStream](#WrappedServerStream)
+ * [func WrapServerStream(stream grpc.ServerStream) \*WrappedServerStream](#WrapServerStream)
+ * [func (w \*WrappedServerStream) Context() context.Context](#WrappedServerStream.Context)
+
+#### <a name="pkg-files">Package files</a>
+[chain.go](./chain.go) [doc.go](./doc.go) [wrappers.go](./wrappers.go)
+
+## <a name="ChainStreamClient">func</a> [ChainStreamClient](./chain.go#L136)
+``` go
+func ChainStreamClient(interceptors ...grpc.StreamClientInterceptor) grpc.StreamClientInterceptor
+```
+ChainStreamClient creates a single interceptor out of a chain of many interceptors.
+
+Execution is done in left-to-right order, including passing of context.
+For example ChainStreamClient(one, two, three) will execute one before two before three.
+
+## <a name="ChainStreamServer">func</a> [ChainStreamServer](./chain.go#L58)
+``` go
+func ChainStreamServer(interceptors ...grpc.StreamServerInterceptor) grpc.StreamServerInterceptor
+```
+ChainStreamServer creates a single interceptor out of a chain of many interceptors.
+
+Execution is done in left-to-right order, including passing of context.
+For example ChainUnaryServer(one, two, three) will execute one before two before three.
+If you want to pass context between interceptors, use WrapServerStream.
+
+## <a name="ChainUnaryClient">func</a> [ChainUnaryClient](./chain.go#L97)
+``` go
+func ChainUnaryClient(interceptors ...grpc.UnaryClientInterceptor) grpc.UnaryClientInterceptor
+```
+ChainUnaryClient creates a single interceptor out of a chain of many interceptors.
+
+Execution is done in left-to-right order, including passing of context.
+For example ChainUnaryClient(one, two, three) will execute one before two before three.
+
+## <a name="ChainUnaryServer">func</a> [ChainUnaryServer](./chain.go#L18)
+``` go
+func ChainUnaryServer(interceptors ...grpc.UnaryServerInterceptor) grpc.UnaryServerInterceptor
+```
+ChainUnaryServer creates a single interceptor out of a chain of many interceptors.
+
+Execution is done in left-to-right order, including passing of context.
+For example ChainUnaryServer(one, two, three) will execute one before two before three, and three
+will see context changes of one and two.
+
+## <a name="WithStreamServerChain">func</a> [WithStreamServerChain](./chain.go#L181)
+``` go
+func WithStreamServerChain(interceptors ...grpc.StreamServerInterceptor) grpc.ServerOption
+```
+WithStreamServerChain is a grpc.Server config option that accepts multiple stream interceptors.
+Basically syntactic sugar.
+
+## <a name="WithUnaryServerChain">func</a> [WithUnaryServerChain](./chain.go#L175)
+``` go
+func WithUnaryServerChain(interceptors ...grpc.UnaryServerInterceptor) grpc.ServerOption
+```
+Chain creates a single interceptor out of a chain of many interceptors.
+
+WithUnaryServerChain is a grpc.Server config option that accepts multiple unary interceptors.
+Basically syntactic sugar.
+
+## <a name="WrappedServerStream">type</a> [WrappedServerStream](./wrappers.go#L12-L16)
+``` go
+type WrappedServerStream struct {
+ grpc.ServerStream
+ // WrappedContext is the wrapper's own Context. You can assign it.
+ WrappedContext context.Context
+}
+```
+WrappedServerStream is a thin wrapper around grpc.ServerStream that allows modifying context.
+
+### <a name="WrapServerStream">func</a> [WrapServerStream](./wrappers.go#L24)
+``` go
+func WrapServerStream(stream grpc.ServerStream) *WrappedServerStream
+```
+WrapServerStream returns a ServerStream that has the ability to overwrite context.
+
+### <a name="WrappedServerStream.Context">func</a> (\*WrappedServerStream) [Context](./wrappers.go#L19)
+``` go
+func (w *WrappedServerStream) Context() context.Context
+```
+Context returns the wrapper's WrappedContext, overwriting the nested grpc.ServerStream.Context()
+
+- - -
+Generated by [godoc2ghmd](https://github.com/GandalfUK/godoc2ghmd)
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock
new file mode 100644
index 0000000..ebdcb75
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.lock
@@ -0,0 +1,123 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+ name = "cloud.google.com/go"
+ packages = ["compute/metadata"]
+ revision = "2d3a6656c17a60b0815b7e06ab0be04eacb6e613"
+ version = "v0.16.0"
+
+[[projects]]
+ name = "github.com/davecgh/go-spew"
+ packages = ["spew"]
+ revision = "346938d642f2ec3594ed81d874461961cd0faa76"
+ version = "v1.1.0"
+
+[[projects]]
+ name = "github.com/gogo/protobuf"
+ packages = ["gogoproto","proto","protoc-gen-gogo/descriptor"]
+ revision = "342cbe0a04158f6dcb03ca0079991a51a4248c02"
+ version = "v0.5"
+
+[[projects]]
+ branch = "master"
+ name = "github.com/golang/protobuf"
+ packages = ["jsonpb","proto","ptypes","ptypes/any","ptypes/duration","ptypes/struct","ptypes/timestamp"]
+ revision = "1e59b77b52bf8e4b449a57e6f79f21226d571845"
+
+[[projects]]
+ name = "github.com/opentracing/opentracing-go"
+ packages = [".","ext","log","mocktracer"]
+ revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38"
+ version = "v1.0.2"
+
+[[projects]]
+ name = "github.com/pmezard/go-difflib"
+ packages = ["difflib"]
+ revision = "792786c7400a136282c1664665ae0a8db921c6c2"
+ version = "v1.0.0"
+
+[[projects]]
+ name = "github.com/sirupsen/logrus"
+ packages = ["."]
+ revision = "f006c2ac4710855cf0f916dd6b77acf6b048dc6e"
+ version = "v1.0.3"
+
+[[projects]]
+ name = "github.com/stretchr/testify"
+ packages = ["assert","require","suite"]
+ revision = "69483b4bd14f5845b5a1e55bca19e954e827f1d0"
+ version = "v1.1.4"
+
+[[projects]]
+ name = "go.uber.org/atomic"
+ packages = ["."]
+ revision = "8474b86a5a6f79c443ce4b2992817ff32cf208b8"
+ version = "v1.3.1"
+
+[[projects]]
+ name = "go.uber.org/multierr"
+ packages = ["."]
+ revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
+ version = "v1.1.0"
+
+[[projects]]
+ name = "go.uber.org/zap"
+ packages = [".","buffer","internal/bufferpool","internal/color","internal/exit","zapcore"]
+ revision = "35aad584952c3e7020db7b839f6b102de6271f89"
+ version = "v1.7.1"
+
+[[projects]]
+ branch = "master"
+ name = "golang.org/x/crypto"
+ packages = ["ssh/terminal"]
+ revision = "94eea52f7b742c7cbe0b03b22f0c4c8631ece122"
+
+[[projects]]
+ branch = "master"
+ name = "golang.org/x/net"
+ packages = ["context","context/ctxhttp","http2","http2/hpack","idna","internal/timeseries","lex/httplex","trace"]
+ revision = "a8b9294777976932365dabb6640cf1468d95c70f"
+
+[[projects]]
+ branch = "master"
+ name = "golang.org/x/oauth2"
+ packages = [".","google","internal","jws","jwt"]
+ revision = "f95fa95eaa936d9d87489b15d1d18b97c1ba9c28"
+
+[[projects]]
+ branch = "master"
+ name = "golang.org/x/sys"
+ packages = ["unix","windows"]
+ revision = "13fcbd661c8ececa8807a29b48407d674b1d8ed8"
+
+[[projects]]
+ branch = "master"
+ name = "golang.org/x/text"
+ packages = ["collate","collate/build","internal/colltab","internal/gen","internal/tag","internal/triegen","internal/ucd","language","secure/bidirule","transform","unicode/bidi","unicode/cldr","unicode/norm","unicode/rangetable"]
+ revision = "75cc3cad82b5f47d3fb229ddda8c5167da14f294"
+
+[[projects]]
+ name = "google.golang.org/appengine"
+ packages = [".","internal","internal/app_identity","internal/base","internal/datastore","internal/log","internal/modules","internal/remote_api","internal/urlfetch","urlfetch"]
+ revision = "150dc57a1b433e64154302bdc40b6bb8aefa313a"
+ version = "v1.0.0"
+
+[[projects]]
+ branch = "master"
+ name = "google.golang.org/genproto"
+ packages = ["googleapis/rpc/status"]
+ revision = "7f0da29060c682909f650ad8ed4e515bd74fa12a"
+
+[[projects]]
+ name = "google.golang.org/grpc"
+ packages = [".","balancer","balancer/roundrobin","codes","connectivity","credentials","credentials/oauth","encoding","grpclb/grpc_lb_v1/messages","grpclog","internal","keepalive","metadata","naming","peer","resolver","resolver/dns","resolver/passthrough","stats","status","tap","transport"]
+ revision = "5a9f7b402fe85096d2e1d0383435ee1876e863d0"
+ version = "v1.8.0"
+
+[solve-meta]
+ analyzer-name = "dep"
+ analyzer-version = 1
+ inputs-digest = "b24c6670412eb0bc44ed1db77fecc52333f8725f3e3272bdc568f5683a63031f"
+ solver-name = "gps-cdcl"
+ solver-version = 1
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml
new file mode 100644
index 0000000..0a7d4c1
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/Gopkg.toml
@@ -0,0 +1,35 @@
+[[constraint]]
+ name = "github.com/gogo/protobuf"
+ version = "0.5.0"
+
+[[constraint]]
+ branch = "master"
+ name = "github.com/golang/protobuf"
+
+[[constraint]]
+ name = "github.com/opentracing/opentracing-go"
+ version = "1.0.2"
+
+[[constraint]]
+ name = "github.com/sirupsen/logrus"
+ version = "1.0.3"
+
+[[constraint]]
+ name = "github.com/stretchr/testify"
+ version = "1.1.4"
+
+[[constraint]]
+ name = "go.uber.org/zap"
+ version = "1.7.1"
+
+[[constraint]]
+ branch = "master"
+ name = "golang.org/x/net"
+
+[[constraint]]
+ branch = "master"
+ name = "golang.org/x/oauth2"
+
+[[constraint]]
+ name = "google.golang.org/grpc"
+ version = "1.8.0"
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE
new file mode 100644
index 0000000..b2b0650
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/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
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+ meet the following conditions:
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+
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+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
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+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
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+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
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+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
+
+ APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
+ comment syntax for the file format. We also recommend that a
+ file or class name and description of purpose be included on the
+ same "printed page" as the copyright notice for easier
+ identification within third-party archives.
+
+ Copyright [yyyy] [name of copyright owner]
+
+ 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.
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md
new file mode 100644
index 0000000..52e5373
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/README.md
@@ -0,0 +1,86 @@
+# Go gRPC Middleware
+
+[](https://travis-ci.org/grpc-ecosystem/go-grpc-middleware)
+[](https://goreportcard.com/report/github.com/grpc-ecosystem/go-grpc-middleware)
+[](https://godoc.org/github.com/grpc-ecosystem/go-grpc-middleware)
+[](https://sourcegraph.com/github.com/grpc-ecosystem/go-grpc-middleware/?badge)
+[](https://codecov.io/gh/grpc-ecosystem/go-grpc-middleware)
+[](LICENSE)
+[](#status)
+[](https://join.slack.com/t/improbable-eng/shared_invite/enQtMzQ1ODcyMzQ5MjM4LWY5ZWZmNGM2ODc5MmViNmQ3ZTA3ZTY3NzQwOTBlMTkzZmIxZTIxODk0OWU3YjZhNWVlNDU3MDlkZGViZjhkMjc)
+
+[gRPC Go](https://github.com/grpc/grpc-go) Middleware: interceptors, helpers, utilities.
+
+**Important** The repo recently moved to `github.com/grpc-ecosystem/go-grpc-middleware`, please update your import paths.
+
+## Middleware
+
+[gRPC Go](https://github.com/grpc/grpc-go) recently acquired support for
+Interceptors, i.e. [middleware](https://medium.com/@matryer/writing-middleware-in-golang-and-how-go-makes-it-so-much-fun-4375c1246e81#.gv7tdlghs)
+that is executed either on the gRPC Server before the request is passed onto the user's application logic, or on the gRPC client either around the user call. It is a perfect way to implement
+common patterns: auth, logging, message, validation, retries or monitoring.
+
+These are generic building blocks that make it easy to build multiple microservices easily.
+The purpose of this repository is to act as a go-to point for such reusable functionality. It contains
+some of them itself, but also will link to useful external repos.
+
+`grpc_middleware` itself provides support for chaining interceptors. See [Documentation](DOC.md), but here's an example:
+
+```go
+import "github.com/grpc-ecosystem/go-grpc-middleware"
+
+myServer := grpc.NewServer(
+ grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
+ grpc_ctxtags.StreamServerInterceptor(),
+ grpc_opentracing.StreamServerInterceptor(),
+ grpc_prometheus.StreamServerInterceptor,
+ grpc_zap.StreamServerInterceptor(zapLogger),
+ grpc_auth.StreamServerInterceptor(myAuthFunction),
+ grpc_recovery.StreamServerInterceptor(),
+ )),
+ grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
+ grpc_ctxtags.UnaryServerInterceptor(),
+ grpc_opentracing.UnaryServerInterceptor(),
+ grpc_prometheus.UnaryServerInterceptor,
+ grpc_zap.UnaryServerInterceptor(zapLogger),
+ grpc_auth.UnaryServerInterceptor(myAuthFunction),
+ grpc_recovery.UnaryServerInterceptor(),
+ )),
+)
+```
+
+## Interceptors
+
+*Please send a PR to add new interceptors or middleware to this list*
+
+#### Auth
+ * [`grpc_auth`](auth) - a customizable (via `AuthFunc`) piece of auth middleware
+
+#### Logging
+ * [`grpc_ctxtags`](tags/) - a library that adds a `Tag` map to context, with data populated from request body
+ * [`grpc_zap`](logging/zap/) - integration of [zap](https://github.com/uber-go/zap) logging library into gRPC handlers.
+ * [`grpc_logrus`](logging/logrus/) - integration of [logrus](https://github.com/sirupsen/logrus) logging library into gRPC handlers.
+
+
+#### Monitoring
+ * [`grpc_prometheus`⚡](https://github.com/grpc-ecosystem/go-grpc-prometheus) - Prometheus client-side and server-side monitoring middleware
+ * [`otgrpc`⚡](https://github.com/grpc-ecosystem/grpc-opentracing/tree/master/go/otgrpc) - [OpenTracing](http://opentracing.io/) client-side and server-side interceptors
+ * [`grpc_opentracing`](tracing/opentracing) - [OpenTracing](http://opentracing.io/) client-side and server-side interceptors with support for streaming and handler-returned tags
+
+#### Client
+ * [`grpc_retry`](retry/) - a generic gRPC response code retry mechanism, client-side middleware
+
+#### Server
+ * [`grpc_validator`](validator/) - codegen inbound message validation from `.proto` options
+ * [`grpc_recovery`](recovery/) - turn panics into gRPC errors
+
+
+## Status
+
+This code has been running in *production* since May 2016 as the basis of the gRPC micro services stack at [Improbable](https://improbable.io).
+
+Additional tooling will be added, and contributions are welcome.
+
+## License
+
+`go-grpc-middleware` is released under the Apache 2.0 license. See the [LICENSE](LICENSE) file for details.
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/auth/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/auth/README.md
new file mode 120000
index 0000000..71bfc07
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/auth/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go
new file mode 100644
index 0000000..45a2f5f
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go
@@ -0,0 +1,183 @@
+// Copyright 2016 Michal Witkowski. All Rights Reserved.
+// See LICENSE for licensing terms.
+
+// gRPC Server Interceptor chaining middleware.
+
+package grpc_middleware
+
+import (
+ "golang.org/x/net/context"
+ "google.golang.org/grpc"
+)
+
+// ChainUnaryServer creates a single interceptor out of a chain of many interceptors.
+//
+// Execution is done in left-to-right order, including passing of context.
+// For example ChainUnaryServer(one, two, three) will execute one before two before three, and three
+// will see context changes of one and two.
+func ChainUnaryServer(interceptors ...grpc.UnaryServerInterceptor) grpc.UnaryServerInterceptor {
+ n := len(interceptors)
+
+ if n > 1 {
+ lastI := n - 1
+ return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+ var (
+ chainHandler grpc.UnaryHandler
+ curI int
+ )
+
+ chainHandler = func(currentCtx context.Context, currentReq interface{}) (interface{}, error) {
+ if curI == lastI {
+ return handler(currentCtx, currentReq)
+ }
+ curI++
+ resp, err := interceptors[curI](currentCtx, currentReq, info, chainHandler)
+ curI--
+ return resp, err
+ }
+
+ return interceptors[0](ctx, req, info, chainHandler)
+ }
+ }
+
+ if n == 1 {
+ return interceptors[0]
+ }
+
+ // n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
+ return func(ctx context.Context, req interface{}, _ *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+ return handler(ctx, req)
+ }
+}
+
+// ChainStreamServer creates a single interceptor out of a chain of many interceptors.
+//
+// Execution is done in left-to-right order, including passing of context.
+// For example ChainUnaryServer(one, two, three) will execute one before two before three.
+// If you want to pass context between interceptors, use WrapServerStream.
+func ChainStreamServer(interceptors ...grpc.StreamServerInterceptor) grpc.StreamServerInterceptor {
+ n := len(interceptors)
+
+ if n > 1 {
+ lastI := n - 1
+ return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+ var (
+ chainHandler grpc.StreamHandler
+ curI int
+ )
+
+ chainHandler = func(currentSrv interface{}, currentStream grpc.ServerStream) error {
+ if curI == lastI {
+ return handler(currentSrv, currentStream)
+ }
+ curI++
+ err := interceptors[curI](currentSrv, currentStream, info, chainHandler)
+ curI--
+ return err
+ }
+
+ return interceptors[0](srv, stream, info, chainHandler)
+ }
+ }
+
+ if n == 1 {
+ return interceptors[0]
+ }
+
+ // n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
+ return func(srv interface{}, stream grpc.ServerStream, _ *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+ return handler(srv, stream)
+ }
+}
+
+// ChainUnaryClient creates a single interceptor out of a chain of many interceptors.
+//
+// Execution is done in left-to-right order, including passing of context.
+// For example ChainUnaryClient(one, two, three) will execute one before two before three.
+func ChainUnaryClient(interceptors ...grpc.UnaryClientInterceptor) grpc.UnaryClientInterceptor {
+ n := len(interceptors)
+
+ if n > 1 {
+ lastI := n - 1
+ return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+ var (
+ chainHandler grpc.UnaryInvoker
+ curI int
+ )
+
+ chainHandler = func(currentCtx context.Context, currentMethod string, currentReq, currentRepl interface{}, currentConn *grpc.ClientConn, currentOpts ...grpc.CallOption) error {
+ if curI == lastI {
+ return invoker(currentCtx, currentMethod, currentReq, currentRepl, currentConn, currentOpts...)
+ }
+ curI++
+ err := interceptors[curI](currentCtx, currentMethod, currentReq, currentRepl, currentConn, chainHandler, currentOpts...)
+ curI--
+ return err
+ }
+
+ return interceptors[0](ctx, method, req, reply, cc, chainHandler, opts...)
+ }
+ }
+
+ if n == 1 {
+ return interceptors[0]
+ }
+
+ // n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
+ return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+ return invoker(ctx, method, req, reply, cc, opts...)
+ }
+}
+
+// ChainStreamClient creates a single interceptor out of a chain of many interceptors.
+//
+// Execution is done in left-to-right order, including passing of context.
+// For example ChainStreamClient(one, two, three) will execute one before two before three.
+func ChainStreamClient(interceptors ...grpc.StreamClientInterceptor) grpc.StreamClientInterceptor {
+ n := len(interceptors)
+
+ if n > 1 {
+ lastI := n - 1
+ return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
+ var (
+ chainHandler grpc.Streamer
+ curI int
+ )
+
+ chainHandler = func(currentCtx context.Context, currentDesc *grpc.StreamDesc, currentConn *grpc.ClientConn, currentMethod string, currentOpts ...grpc.CallOption) (grpc.ClientStream, error) {
+ if curI == lastI {
+ return streamer(currentCtx, currentDesc, currentConn, currentMethod, currentOpts...)
+ }
+ curI++
+ stream, err := interceptors[curI](currentCtx, currentDesc, currentConn, currentMethod, chainHandler, currentOpts...)
+ curI--
+ return stream, err
+ }
+
+ return interceptors[0](ctx, desc, cc, method, chainHandler, opts...)
+ }
+ }
+
+ if n == 1 {
+ return interceptors[0]
+ }
+
+ // n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil.
+ return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
+ return streamer(ctx, desc, cc, method, opts...)
+ }
+}
+
+// Chain creates a single interceptor out of a chain of many interceptors.
+//
+// WithUnaryServerChain is a grpc.Server config option that accepts multiple unary interceptors.
+// Basically syntactic sugar.
+func WithUnaryServerChain(interceptors ...grpc.UnaryServerInterceptor) grpc.ServerOption {
+ return grpc.UnaryInterceptor(ChainUnaryServer(interceptors...))
+}
+
+// WithStreamServerChain is a grpc.Server config option that accepts multiple stream interceptors.
+// Basically syntactic sugar.
+func WithStreamServerChain(interceptors ...grpc.StreamServerInterceptor) grpc.ServerOption {
+ return grpc.StreamInterceptor(ChainStreamServer(interceptors...))
+}
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go
new file mode 100644
index 0000000..7168950
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go
@@ -0,0 +1,69 @@
+// Copyright 2016 Michal Witkowski. All Rights Reserved.
+// See LICENSE for licensing terms.
+
+/*
+`grpc_middleware` is a collection of gRPC middleware packages: interceptors, helpers and tools.
+
+Middleware
+
+gRPC is a fantastic RPC middleware, which sees a lot of adoption in the Golang world. However, the
+upstream gRPC codebase is relatively bare bones.
+
+This package, and most of its child packages provides commonly needed middleware for gRPC:
+client-side interceptors for retires, server-side interceptors for input validation and auth,
+functions for chaining said interceptors, metadata convenience methods and more.
+
+Chaining
+
+By default, gRPC doesn't allow one to have more than one interceptor either on the client nor on
+the server side. `grpc_middleware` provides convenient chaining methods
+
+Simple way of turning a multiple interceptors into a single interceptor. Here's an example for
+server chaining:
+
+ myServer := grpc.NewServer(
+ grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(loggingStream, monitoringStream, authStream)),
+ grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(loggingUnary, monitoringUnary, authUnary),
+ )
+
+These interceptors will be executed from left to right: logging, monitoring and auth.
+
+Here's an example for client side chaining:
+
+ clientConn, err = grpc.Dial(
+ address,
+ grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(monitoringClientUnary, retryUnary)),
+ grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(monitoringClientStream, retryStream)),
+ )
+ client = pb_testproto.NewTestServiceClient(clientConn)
+ resp, err := client.PingEmpty(s.ctx, &myservice.Request{Msg: "hello"})
+
+These interceptors will be executed from left to right: monitoring and then retry logic.
+
+The retry interceptor will call every interceptor that follows it whenever when a retry happens.
+
+Writing Your Own
+
+Implementing your own interceptor is pretty trivial: there are interfaces for that. But the interesting
+bit exposing common data to handlers (and other middleware), similarly to HTTP Middleware design.
+For example, you may want to pass the identity of the caller from the auth interceptor all the way
+to the handling function.
+
+For example, a client side interceptor example for auth looks like:
+
+ func FakeAuthUnaryInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+ newCtx := context.WithValue(ctx, "user_id", "john@example.com")
+ return handler(newCtx, req)
+ }
+
+Unfortunately, it's not as easy for streaming RPCs. These have the `context.Context` embedded within
+the `grpc.ServerStream` object. To pass values through context, a wrapper (`WrappedServerStream`) is
+needed. For example:
+
+ func FakeAuthStreamingInterceptor(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+ newStream := grpc_middleware.WrapServerStream(stream)
+ newStream.WrappedContext = context.WithValue(ctx, "user_id", "john@example.com")
+ return handler(srv, stream)
+ }
+*/
+package grpc_middleware
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/README.md
new file mode 120000
index 0000000..71bfc07
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus/README.md
new file mode 120000
index 0000000..71bfc07
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/zap/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/zap/README.md
new file mode 120000
index 0000000..71bfc07
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/logging/zap/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile
new file mode 100644
index 0000000..3e0f296
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/makefile
@@ -0,0 +1,22 @@
+SHELL="/bin/bash"
+
+GOFILES_NOVENDOR = $(shell go list ./... | grep -v /vendor/)
+
+all: vet fmt docs test
+
+docs:
+ ./scripts/docs.sh generate
+
+checkdocs:
+ ./scripts/docs.sh check
+
+fmt:
+ go fmt $(GOFILES_NOVENDOR)
+
+vet:
+ go vet $(GOFILES_NOVENDOR)
+
+test: vet
+ ./scripts/test_all.sh
+
+.PHONY: all docs validate test
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/recovery/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/recovery/README.md
new file mode 120000
index 0000000..71bfc07
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/recovery/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/retry/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/retry/README.md
new file mode 120000
index 0000000..71bfc07
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/retry/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/slack.png b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/slack.png
new file mode 100644
index 0000000..cc8f9a6
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/slack.png
Binary files differ
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/README.md
new file mode 120000
index 0000000..71bfc07
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tags/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/README.md
new file mode 120000
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--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/README.md b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/README.md
new file mode 120000
index 0000000..71bfc07
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/metautils/README.md
@@ -0,0 +1 @@
+DOC.md
\ No newline at end of file
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go
new file mode 100644
index 0000000..597b862
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go
@@ -0,0 +1,29 @@
+// Copyright 2016 Michal Witkowski. All Rights Reserved.
+// See LICENSE for licensing terms.
+
+package grpc_middleware
+
+import (
+ "golang.org/x/net/context"
+ "google.golang.org/grpc"
+)
+
+// WrappedServerStream is a thin wrapper around grpc.ServerStream that allows modifying context.
+type WrappedServerStream struct {
+ grpc.ServerStream
+ // WrappedContext is the wrapper's own Context. You can assign it.
+ WrappedContext context.Context
+}
+
+// Context returns the wrapper's WrappedContext, overwriting the nested grpc.ServerStream.Context()
+func (w *WrappedServerStream) Context() context.Context {
+ return w.WrappedContext
+}
+
+// WrapServerStream returns a ServerStream that has the ability to overwrite context.
+func WrapServerStream(stream grpc.ServerStream) *WrappedServerStream {
+ if existing, ok := stream.(*WrappedServerStream); ok {
+ return existing
+ }
+ return &WrappedServerStream{ServerStream: stream, WrappedContext: stream.Context()}
+}
