Dependencies for the affinity router and the
affinity routing daemon.
Change-Id: Icda72c3594ef7f8f0bc0c33dc03087a4c25529ca
diff --git a/vendor/github.com/modern-go/concurrent/.gitignore b/vendor/github.com/modern-go/concurrent/.gitignore
new file mode 100644
index 0000000..3f2bc47
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/.gitignore
@@ -0,0 +1 @@
+/coverage.txt
diff --git a/vendor/github.com/modern-go/concurrent/.travis.yml b/vendor/github.com/modern-go/concurrent/.travis.yml
new file mode 100644
index 0000000..449e67c
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/.travis.yml
@@ -0,0 +1,14 @@
+language: go
+
+go:
+ - 1.8.x
+ - 1.x
+
+before_install:
+ - go get -t -v ./...
+
+script:
+ - ./test.sh
+
+after_success:
+ - bash <(curl -s https://codecov.io/bash)
diff --git a/vendor/github.com/modern-go/concurrent/LICENSE b/vendor/github.com/modern-go/concurrent/LICENSE
new file mode 100644
index 0000000..261eeb9
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/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:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
+ include a readable copy of the attribution notices contained
+ within such NOTICE file, excluding those notices that do not
+ pertain to any part of the Derivative Works, in at least one
+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 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,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ 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
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ 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.
diff --git a/vendor/github.com/modern-go/concurrent/README.md b/vendor/github.com/modern-go/concurrent/README.md
new file mode 100644
index 0000000..acab320
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/README.md
@@ -0,0 +1,49 @@
+# concurrent
+
+[](https://sourcegraph.com/github.com/modern-go/concurrent?badge)
+[](http://godoc.org/github.com/modern-go/concurrent)
+[](https://travis-ci.org/modern-go/concurrent)
+[](https://codecov.io/gh/modern-go/concurrent)
+[](https://goreportcard.com/report/github.com/modern-go/concurrent)
+[](https://raw.githubusercontent.com/modern-go/concurrent/master/LICENSE)
+
+* concurrent.Map: backport sync.Map for go below 1.9
+* concurrent.Executor: goroutine with explicit ownership and cancellable
+
+# concurrent.Map
+
+because sync.Map is only available in go 1.9, we can use concurrent.Map to make code portable
+
+```go
+m := concurrent.NewMap()
+m.Store("hello", "world")
+elem, found := m.Load("hello")
+// elem will be "world"
+// found will be true
+```
+
+# concurrent.Executor
+
+```go
+executor := concurrent.NewUnboundedExecutor()
+executor.Go(func(ctx context.Context) {
+ everyMillisecond := time.NewTicker(time.Millisecond)
+ for {
+ select {
+ case <-ctx.Done():
+ fmt.Println("goroutine exited")
+ return
+ case <-everyMillisecond.C:
+ // do something
+ }
+ }
+})
+time.Sleep(time.Second)
+executor.StopAndWaitForever()
+fmt.Println("executor stopped")
+```
+
+attach goroutine to executor instance, so that we can
+
+* cancel it by stop the executor with Stop/StopAndWait/StopAndWaitForever
+* handle panic by callback: the default behavior will no longer crash your application
\ No newline at end of file
diff --git a/vendor/github.com/modern-go/concurrent/executor.go b/vendor/github.com/modern-go/concurrent/executor.go
new file mode 100644
index 0000000..623dba1
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/executor.go
@@ -0,0 +1,14 @@
+package concurrent
+
+import "context"
+
+// Executor replace go keyword to start a new goroutine
+// the goroutine should cancel itself if the context passed in has been cancelled
+// the goroutine started by the executor, is owned by the executor
+// we can cancel all executors owned by the executor just by stop the executor itself
+// however Executor interface does not Stop method, the one starting and owning executor
+// should use the concrete type of executor, instead of this interface.
+type Executor interface {
+ // Go starts a new goroutine controlled by the context
+ Go(handler func(ctx context.Context))
+}
diff --git a/vendor/github.com/modern-go/concurrent/go_above_19.go b/vendor/github.com/modern-go/concurrent/go_above_19.go
new file mode 100644
index 0000000..aeabf8c
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/go_above_19.go
@@ -0,0 +1,15 @@
+//+build go1.9
+
+package concurrent
+
+import "sync"
+
+// Map is a wrapper for sync.Map introduced in go1.9
+type Map struct {
+ sync.Map
+}
+
+// NewMap creates a thread safe Map
+func NewMap() *Map {
+ return &Map{}
+}
diff --git a/vendor/github.com/modern-go/concurrent/go_below_19.go b/vendor/github.com/modern-go/concurrent/go_below_19.go
new file mode 100644
index 0000000..b9c8df7
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/go_below_19.go
@@ -0,0 +1,33 @@
+//+build !go1.9
+
+package concurrent
+
+import "sync"
+
+// Map implements a thread safe map for go version below 1.9 using mutex
+type Map struct {
+ lock sync.RWMutex
+ data map[interface{}]interface{}
+}
+
+// NewMap creates a thread safe map
+func NewMap() *Map {
+ return &Map{
+ data: make(map[interface{}]interface{}, 32),
+ }
+}
+
+// Load is same as sync.Map Load
+func (m *Map) Load(key interface{}) (elem interface{}, found bool) {
+ m.lock.RLock()
+ elem, found = m.data[key]
+ m.lock.RUnlock()
+ return
+}
+
+// Load is same as sync.Map Store
+func (m *Map) Store(key interface{}, elem interface{}) {
+ m.lock.Lock()
+ m.data[key] = elem
+ m.lock.Unlock()
+}
diff --git a/vendor/github.com/modern-go/concurrent/log.go b/vendor/github.com/modern-go/concurrent/log.go
new file mode 100644
index 0000000..9756fcc
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/log.go
@@ -0,0 +1,13 @@
+package concurrent
+
+import (
+ "os"
+ "log"
+ "io/ioutil"
+)
+
+// ErrorLogger is used to print out error, can be set to writer other than stderr
+var ErrorLogger = log.New(os.Stderr, "", 0)
+
+// InfoLogger is used to print informational message, default to off
+var InfoLogger = log.New(ioutil.Discard, "", 0)
\ No newline at end of file
diff --git a/vendor/github.com/modern-go/concurrent/test.sh b/vendor/github.com/modern-go/concurrent/test.sh
new file mode 100755
index 0000000..d1e6b2e
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/test.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -e
+echo "" > coverage.txt
+
+for d in $(go list ./... | grep -v vendor); do
+ go test -coverprofile=profile.out -coverpkg=github.com/modern-go/concurrent $d
+ if [ -f profile.out ]; then
+ cat profile.out >> coverage.txt
+ rm profile.out
+ fi
+done
diff --git a/vendor/github.com/modern-go/concurrent/unbounded_executor.go b/vendor/github.com/modern-go/concurrent/unbounded_executor.go
new file mode 100644
index 0000000..05a77dc
--- /dev/null
+++ b/vendor/github.com/modern-go/concurrent/unbounded_executor.go
@@ -0,0 +1,119 @@
+package concurrent
+
+import (
+ "context"
+ "fmt"
+ "runtime"
+ "runtime/debug"
+ "sync"
+ "time"
+ "reflect"
+)
+
+// HandlePanic logs goroutine panic by default
+var HandlePanic = func(recovered interface{}, funcName string) {
+ ErrorLogger.Println(fmt.Sprintf("%s panic: %v", funcName, recovered))
+ ErrorLogger.Println(string(debug.Stack()))
+}
+
+// UnboundedExecutor is a executor without limits on counts of alive goroutines
+// it tracks the goroutine started by it, and can cancel them when shutdown
+type UnboundedExecutor struct {
+ ctx context.Context
+ cancel context.CancelFunc
+ activeGoroutinesMutex *sync.Mutex
+ activeGoroutines map[string]int
+ HandlePanic func(recovered interface{}, funcName string)
+}
+
+// GlobalUnboundedExecutor has the life cycle of the program itself
+// any goroutine want to be shutdown before main exit can be started from this executor
+// GlobalUnboundedExecutor expects the main function to call stop
+// it does not magically knows the main function exits
+var GlobalUnboundedExecutor = NewUnboundedExecutor()
+
+// NewUnboundedExecutor creates a new UnboundedExecutor,
+// UnboundedExecutor can not be created by &UnboundedExecutor{}
+// HandlePanic can be set with a callback to override global HandlePanic
+func NewUnboundedExecutor() *UnboundedExecutor {
+ ctx, cancel := context.WithCancel(context.TODO())
+ return &UnboundedExecutor{
+ ctx: ctx,
+ cancel: cancel,
+ activeGoroutinesMutex: &sync.Mutex{},
+ activeGoroutines: map[string]int{},
+ }
+}
+
+// Go starts a new goroutine and tracks its lifecycle.
+// Panic will be recovered and logged automatically, except for StopSignal
+func (executor *UnboundedExecutor) Go(handler func(ctx context.Context)) {
+ pc := reflect.ValueOf(handler).Pointer()
+ f := runtime.FuncForPC(pc)
+ funcName := f.Name()
+ file, line := f.FileLine(pc)
+ executor.activeGoroutinesMutex.Lock()
+ defer executor.activeGoroutinesMutex.Unlock()
+ startFrom := fmt.Sprintf("%s:%d", file, line)
+ executor.activeGoroutines[startFrom] += 1
+ go func() {
+ defer func() {
+ recovered := recover()
+ // if you want to quit a goroutine without trigger HandlePanic
+ // use runtime.Goexit() to quit
+ if recovered != nil {
+ if executor.HandlePanic == nil {
+ HandlePanic(recovered, funcName)
+ } else {
+ executor.HandlePanic(recovered, funcName)
+ }
+ }
+ executor.activeGoroutinesMutex.Lock()
+ executor.activeGoroutines[startFrom] -= 1
+ executor.activeGoroutinesMutex.Unlock()
+ }()
+ handler(executor.ctx)
+ }()
+}
+
+// Stop cancel all goroutines started by this executor without wait
+func (executor *UnboundedExecutor) Stop() {
+ executor.cancel()
+}
+
+// StopAndWaitForever cancel all goroutines started by this executor and
+// wait until all goroutines exited
+func (executor *UnboundedExecutor) StopAndWaitForever() {
+ executor.StopAndWait(context.Background())
+}
+
+// StopAndWait cancel all goroutines started by this executor and wait.
+// Wait can be cancelled by the context passed in.
+func (executor *UnboundedExecutor) StopAndWait(ctx context.Context) {
+ executor.cancel()
+ for {
+ oneHundredMilliseconds := time.NewTimer(time.Millisecond * 100)
+ select {
+ case <-oneHundredMilliseconds.C:
+ if executor.checkNoActiveGoroutines() {
+ return
+ }
+ case <-ctx.Done():
+ return
+ }
+ }
+}
+
+func (executor *UnboundedExecutor) checkNoActiveGoroutines() bool {
+ executor.activeGoroutinesMutex.Lock()
+ defer executor.activeGoroutinesMutex.Unlock()
+ for startFrom, count := range executor.activeGoroutines {
+ if count > 0 {
+ InfoLogger.Println("UnboundedExecutor is still waiting goroutines to quit",
+ "startFrom", startFrom,
+ "count", count)
+ return false
+ }
+ }
+ return true
+}