1 files changed, 269 insertions, 0 deletions
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 000000000..dd49c41f9
--- /dev/null
+++ b/vendor/k8s.io/apimachinery/pkg/watch/watch.go
@@ -0,0 +1,269 @@
+/*
+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"
+
+	"k8s.io/apimachinery/pkg/runtime"
+
+	"github.com/golang/glog"
+)
+
+// 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.
+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"))
+		}
+	}
+}