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Ensure proper serialization of updates and creates in federation test watcher

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This commit is contained in:
Marcin Wielgus 2016-11-10 23:23:24 +01:00
parent abd653bd97
commit 3540846fbe
1 changed files with 23 additions and 8 deletions
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31
federation/pkg/federation-controller/util/test/test_helper.go
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@ -39,8 +39,10 @@ import (
// A structure that distributes eventes to multiple watchers.
type WatcherDispatcher struct {
sync.Mutex
watchers []*watch.RaceFreeFakeWatcher
eventsSoFar []*watch.Event
watchers []*watch.RaceFreeFakeWatcher
eventsSoFar []*watch.Event
orderExecution chan func()
stopChan chan struct{}
}
func (wd *WatcherDispatcher) register(watcher *watch.RaceFreeFakeWatcher) {
@ -55,6 +57,7 @@ func (wd *WatcherDispatcher) register(watcher *watch.RaceFreeFakeWatcher) {
func (wd *WatcherDispatcher) Stop() {
wd.Lock()
defer wd.Unlock()
close(wd.stopChan)
for _, watcher := range wd.watchers {
watcher.Stop()
}
@ -136,9 +139,21 @@ func (wd *WatcherDispatcher) Action(action watch.EventType, obj runtime.Object)
// All subsequent requests for a watch on the client will result in returning this fake watcher.
func RegisterFakeWatch(resource string, client *core.Fake) *WatcherDispatcher {
dispatcher := &WatcherDispatcher{
watchers: make([]*watch.RaceFreeFakeWatcher, 0),
eventsSoFar: make([]*watch.Event, 0),
watchers: make([]*watch.RaceFreeFakeWatcher, 0),
eventsSoFar: make([]*watch.Event, 0),
orderExecution: make(chan func()),
stopChan: make(chan struct{}),
}
go func() {
for {
select {
case fun := <-dispatcher.orderExecution:
fun()
case <-dispatcher.stopChan:
return
}
}
}()
client.AddWatchReactor(resource, func(action core.Action) (bool, watch.Interface, error) {
watcher := watch.NewRaceFreeFake()
@ -166,11 +181,11 @@ func RegisterFakeCopyOnCreate(resource string, client *core.Fake, watcher *Watch
originalObj := createAction.GetObject()
// Create a copy of the object here to prevent data races while reading the object in go routine.
obj := copy(originalObj)
go func() {
watcher.orderExecution <- func() {
glog.V(4).Infof("Object created. Writing to channel: %v", obj)
watcher.Add(obj)
objChan <- obj
}()
}
return true, originalObj, nil
})
return objChan
@ -186,11 +201,11 @@ func RegisterFakeCopyOnUpdate(resource string, client *core.Fake, watcher *Watch
originalObj := updateAction.GetObject()
// Create a copy of the object here to prevent data races while reading the object in go routine.
obj := copy(originalObj)
go func() {
watcher.orderExecution <- func() {
glog.V(4).Infof("Object updated. Writing to channel: %v", obj)
watcher.Modify(obj)
objChan <- obj
}()
}
return true, originalObj, nil
})
return objChan