Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/k8s.io/apimachinery/pkg/watch/watch.go b/vendor/k8s.io/apimachinery/pkg/watch/watch.go
new file mode 100644
index 0000000..a627d1d
--- /dev/null
+++ b/vendor/k8s.io/apimachinery/pkg/watch/watch.go
@@ -0,0 +1,317 @@
+/*
+Copyright 2014 The Kubernetes 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 watch
+
+import (
+ "fmt"
+ "sync"
+
+ "github.com/golang/glog"
+
+ "k8s.io/apimachinery/pkg/runtime"
+)
+
+// Interface can be implemented by anything that knows how to watch and report changes.
+type Interface interface {
+ // Stops watching. Will close the channel returned by ResultChan(). Releases
+ // any resources used by the watch.
+ Stop()
+
+ // Returns a chan which will receive all the events. If an error occurs
+ // or Stop() is called, this channel will be closed, in which case the
+ // watch should be completely cleaned up.
+ ResultChan() <-chan Event
+}
+
+// EventType defines the possible types of events.
+type EventType string
+
+const (
+ Added EventType = "ADDED"
+ Modified EventType = "MODIFIED"
+ Deleted EventType = "DELETED"
+ Error EventType = "ERROR"
+
+ DefaultChanSize int32 = 100
+)
+
+// Event represents a single event to a watched resource.
+// +k8s:deepcopy-gen=true
+type Event struct {
+ Type EventType
+
+ // Object is:
+ // * If Type is Added or Modified: the new state of the object.
+ // * If Type is Deleted: the state of the object immediately before deletion.
+ // * If Type is Error: *api.Status is recommended; other types may make sense
+ // depending on context.
+ Object runtime.Object
+}
+
+type emptyWatch chan Event
+
+// NewEmptyWatch returns a watch interface that returns no results and is closed.
+// May be used in certain error conditions where no information is available but
+// an error is not warranted.
+func NewEmptyWatch() Interface {
+ ch := make(chan Event)
+ close(ch)
+ return emptyWatch(ch)
+}
+
+// Stop implements Interface
+func (w emptyWatch) Stop() {
+}
+
+// ResultChan implements Interface
+func (w emptyWatch) ResultChan() <-chan Event {
+ return chan Event(w)
+}
+
+// FakeWatcher lets you test anything that consumes a watch.Interface; threadsafe.
+type FakeWatcher struct {
+ result chan Event
+ Stopped bool
+ sync.Mutex
+}
+
+func NewFake() *FakeWatcher {
+ return &FakeWatcher{
+ result: make(chan Event),
+ }
+}
+
+func NewFakeWithChanSize(size int, blocking bool) *FakeWatcher {
+ return &FakeWatcher{
+ result: make(chan Event, size),
+ }
+}
+
+// Stop implements Interface.Stop().
+func (f *FakeWatcher) Stop() {
+ f.Lock()
+ defer f.Unlock()
+ if !f.Stopped {
+ glog.V(4).Infof("Stopping fake watcher.")
+ close(f.result)
+ f.Stopped = true
+ }
+}
+
+func (f *FakeWatcher) IsStopped() bool {
+ f.Lock()
+ defer f.Unlock()
+ return f.Stopped
+}
+
+// Reset prepares the watcher to be reused.
+func (f *FakeWatcher) Reset() {
+ f.Lock()
+ defer f.Unlock()
+ f.Stopped = false
+ f.result = make(chan Event)
+}
+
+func (f *FakeWatcher) ResultChan() <-chan Event {
+ return f.result
+}
+
+// Add sends an add event.
+func (f *FakeWatcher) Add(obj runtime.Object) {
+ f.result <- Event{Added, obj}
+}
+
+// Modify sends a modify event.
+func (f *FakeWatcher) Modify(obj runtime.Object) {
+ f.result <- Event{Modified, obj}
+}
+
+// Delete sends a delete event.
+func (f *FakeWatcher) Delete(lastValue runtime.Object) {
+ f.result <- Event{Deleted, lastValue}
+}
+
+// Error sends an Error event.
+func (f *FakeWatcher) Error(errValue runtime.Object) {
+ f.result <- Event{Error, errValue}
+}
+
+// Action sends an event of the requested type, for table-based testing.
+func (f *FakeWatcher) Action(action EventType, obj runtime.Object) {
+ f.result <- Event{action, obj}
+}
+
+// RaceFreeFakeWatcher lets you test anything that consumes a watch.Interface; threadsafe.
+type RaceFreeFakeWatcher struct {
+ result chan Event
+ Stopped bool
+ sync.Mutex
+}
+
+func NewRaceFreeFake() *RaceFreeFakeWatcher {
+ return &RaceFreeFakeWatcher{
+ result: make(chan Event, DefaultChanSize),
+ }
+}
+
+// Stop implements Interface.Stop().
+func (f *RaceFreeFakeWatcher) Stop() {
+ f.Lock()
+ defer f.Unlock()
+ if !f.Stopped {
+ glog.V(4).Infof("Stopping fake watcher.")
+ close(f.result)
+ f.Stopped = true
+ }
+}
+
+func (f *RaceFreeFakeWatcher) IsStopped() bool {
+ f.Lock()
+ defer f.Unlock()
+ return f.Stopped
+}
+
+// Reset prepares the watcher to be reused.
+func (f *RaceFreeFakeWatcher) Reset() {
+ f.Lock()
+ defer f.Unlock()
+ f.Stopped = false
+ f.result = make(chan Event, DefaultChanSize)
+}
+
+func (f *RaceFreeFakeWatcher) ResultChan() <-chan Event {
+ f.Lock()
+ defer f.Unlock()
+ return f.result
+}
+
+// Add sends an add event.
+func (f *RaceFreeFakeWatcher) Add(obj runtime.Object) {
+ f.Lock()
+ defer f.Unlock()
+ if !f.Stopped {
+ select {
+ case f.result <- Event{Added, obj}:
+ return
+ default:
+ panic(fmt.Errorf("channel full"))
+ }
+ }
+}
+
+// Modify sends a modify event.
+func (f *RaceFreeFakeWatcher) Modify(obj runtime.Object) {
+ f.Lock()
+ defer f.Unlock()
+ if !f.Stopped {
+ select {
+ case f.result <- Event{Modified, obj}:
+ return
+ default:
+ panic(fmt.Errorf("channel full"))
+ }
+ }
+}
+
+// Delete sends a delete event.
+func (f *RaceFreeFakeWatcher) Delete(lastValue runtime.Object) {
+ f.Lock()
+ defer f.Unlock()
+ if !f.Stopped {
+ select {
+ case f.result <- Event{Deleted, lastValue}:
+ return
+ default:
+ panic(fmt.Errorf("channel full"))
+ }
+ }
+}
+
+// Error sends an Error event.
+func (f *RaceFreeFakeWatcher) Error(errValue runtime.Object) {
+ f.Lock()
+ defer f.Unlock()
+ if !f.Stopped {
+ select {
+ case f.result <- Event{Error, errValue}:
+ return
+ default:
+ panic(fmt.Errorf("channel full"))
+ }
+ }
+}
+
+// Action sends an event of the requested type, for table-based testing.
+func (f *RaceFreeFakeWatcher) Action(action EventType, obj runtime.Object) {
+ f.Lock()
+ defer f.Unlock()
+ if !f.Stopped {
+ select {
+ case f.result <- Event{action, obj}:
+ return
+ default:
+ panic(fmt.Errorf("channel full"))
+ }
+ }
+}
+
+// ProxyWatcher lets you wrap your channel in watch Interface. Threadsafe.
+type ProxyWatcher struct {
+ result chan Event
+ stopCh chan struct{}
+
+ mutex sync.Mutex
+ stopped bool
+}
+
+var _ Interface = &ProxyWatcher{}
+
+// NewProxyWatcher creates new ProxyWatcher by wrapping a channel
+func NewProxyWatcher(ch chan Event) *ProxyWatcher {
+ return &ProxyWatcher{
+ result: ch,
+ stopCh: make(chan struct{}),
+ stopped: false,
+ }
+}
+
+// Stop implements Interface
+func (pw *ProxyWatcher) Stop() {
+ pw.mutex.Lock()
+ defer pw.mutex.Unlock()
+ if !pw.stopped {
+ pw.stopped = true
+ close(pw.stopCh)
+ }
+}
+
+// Stopping returns true if Stop() has been called
+func (pw *ProxyWatcher) Stopping() bool {
+ pw.mutex.Lock()
+ defer pw.mutex.Unlock()
+ return pw.stopped
+}
+
+// ResultChan implements Interface
+func (pw *ProxyWatcher) ResultChan() <-chan Event {
+ return pw.result
+}
+
+// StopChan returns stop channel
+func (pw *ProxyWatcher) StopChan() <-chan struct{} {
+ return pw.stopCh
+}