+ public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
+ ListenerRegistration<L> registerChangeListener(
+ final YangInstanceIdentifier path, L listener,
+ AsyncDataBroker.DataChangeScope scope) {
+
+ Preconditions.checkNotNull(path, "path should not be null");
+ Preconditions.checkNotNull(listener, "listener should not be null");
+ if(LOG.isDebugEnabled()) {
+ LOG.debug("Registering listener: {} for path: {} scope: {}", listener, path, scope);
+ }
+ ActorRef dataChangeListenerActor = actorContext.getActorSystem().actorOf(
+ DataChangeListener.props(listener ));
+
+ String shardName = ShardStrategyFactory.getStrategy(path).findShard(path);
+
+ Future future = actorContext.executeLocalShardOperationAsync(shardName,
+ new RegisterChangeListener(path, dataChangeListenerActor.path(), scope),
+ new Timeout(actorContext.getOperationDuration().$times(
+ REGISTER_DATA_CHANGE_LISTENER_TIMEOUT_FACTOR)));
+
+ if (future != null) {
+ final DataChangeListenerRegistrationProxy listenerRegistrationProxy =
+ new DataChangeListenerRegistrationProxy(listener, dataChangeListenerActor);
+
+ future.onComplete(new OnComplete(){
+
+ @Override public void onComplete(Throwable failure, Object result)
+ throws Throwable {
+ if(failure != null){
+ LOG.error("Failed to register listener at path " + path.toString(), failure);
+ return;
+ }
+ RegisterChangeListenerReply reply = (RegisterChangeListenerReply) result;
+ listenerRegistrationProxy.setListenerRegistrationActor(actorContext
+ .actorSelection(reply.getListenerRegistrationPath()));
+ }
+ }, actorContext.getActorSystem().dispatcher());
+ return listenerRegistrationProxy;
+ }
+ if(LOG.isDebugEnabled()) {
+ LOG.debug(
+ "No local shard for shardName {} was found so returning a noop registration",
+ shardName);
+ }
+ return new NoOpDataChangeListenerRegistration(listener);