1 files changed, 109 insertions, 0 deletions
diff --git a/kube2msb/src/vendor/k8s.io/kubernetes/pkg/watch/filter.go b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/watch/filter.go
new file mode 100644
index 0000000..3ca27f2
--- /dev/null
+++ b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/watch/filter.go
@@ -0,0 +1,109 @@
+/*
+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 (
+	"sync"
+)
+
+// FilterFunc should take an event, possibly modify it in some way, and return
+// the modified event. If the event should be ignored, then return keep=false.
+type FilterFunc func(in Event) (out Event, keep bool)
+
+// Filter passes all events through f before allowing them to pass on.
+// Putting a filter on a watch, as an unavoidable side-effect due to the way
+// go channels work, effectively causes the watch's event channel to have its
+// queue length increased by one.
+//
+// WARNING: filter has a fatal flaw, in that it can't properly update the
+// Type field (Add/Modified/Deleted) to reflect items beginning to pass the
+// filter when they previously didn't.
+//
+func Filter(w Interface, f FilterFunc) Interface {
+	fw := &filteredWatch{
+		incoming: w,
+		result:   make(chan Event),
+		f:        f,
+	}
+	go fw.loop()
+	return fw
+}
+
+type filteredWatch struct {
+	incoming Interface
+	result   chan Event
+	f        FilterFunc
+}
+
+// ResultChan returns a channel which will receive filtered events.
+func (fw *filteredWatch) ResultChan() <-chan Event {
+	return fw.result
+}
+
+// Stop stops the upstream watch, which will eventually stop this watch.
+func (fw *filteredWatch) Stop() {
+	fw.incoming.Stop()
+}
+
+// loop waits for new values, filters them, and resends them.
+func (fw *filteredWatch) loop() {
+	defer close(fw.result)
+	for {
+		event, ok := <-fw.incoming.ResultChan()
+		if !ok {
+			break
+		}
+		filtered, keep := fw.f(event)
+		if keep {
+			fw.result <- filtered
+		}
+	}
+}
+
+// Recorder records all events that are sent from the watch until it is closed.
+type Recorder struct {
+	Interface
+
+	lock   sync.Mutex
+	events []Event
+}
+
+var _ Interface = &Recorder{}
+
+// NewRecorder wraps an Interface and records any changes sent across it.
+func NewRecorder(w Interface) *Recorder {
+	r := &Recorder{}
+	r.Interface = Filter(w, r.record)
+	return r
+}
+
+// record is a FilterFunc and tracks each received event.
+func (r *Recorder) record(in Event) (Event, bool) {
+	r.lock.Lock()
+	defer r.lock.Unlock()
+	r.events = append(r.events, in)
+	return in, true
+}
+
+// Events returns a copy of the events sent across this recorder.
+func (r *Recorder) Events() []Event {
+	r.lock.Lock()
+	defer r.lock.Unlock()
+	copied := make([]Event, len(r.events))
+	copy(copied, r.events)
+	return copied
+}