// WatchPredicate starts a watch for the items that m matches.
func (e *Etcd) WatchPredicate(ctx api.Context, m generic.Matcher, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, e.EndpointName)
if err != nil {
return nil, err
}
filterFunc := func(obj runtime.Object) bool {
matches, err := m.Matches(obj)
if err != nil {
glog.Errorf("unable to match watch: %v", err)
return false
}
if matches && e.Decorator != nil {
if err := e.Decorator(obj); err != nil {
glog.Errorf("unable to decorate watch: %v", err)
return false
}
}
return matches
}
if name, ok := m.MatchesSingle(); ok {
key, err := e.KeyFunc(ctx, name)
if err != nil {
return nil, err
}
return e.Helper.Watch(key, version, filterFunc)
}
return e.Helper.WatchList(e.KeyRootFunc(ctx), version, filterFunc)
}
// Watch starts a watch for the items that m matches.
// TODO: Detect if m references a single object instead of a list.
func (e *Etcd) Watch(ctx api.Context, m generic.Matcher, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, e.EndpointName)
if err != nil {
return nil, err
}
return e.Helper.WatchList(e.KeyRootFunc(ctx), version, func(obj runtime.Object) bool {
matches, err := m.Matches(obj)
return err == nil && matches
})
}
// Watch starts a watch for the items that m matches.
// TODO: Detect if m references a single object instead of a list.
func (e *Etcd) Watch(ctx api.Context, m generic.Matcher, resourceVersion uint64) (watch.Interface, error) {
return e.Helper.WatchList(e.KeyRoot, resourceVersion, func(obj runtime.Object) bool {
matches, err := m.Matches(obj)
return err == nil && matches
})
}