2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.controller.cluster.datastore;
11 import akka.actor.Props;
12 import akka.japi.Creator;
14 import com.google.common.base.Preconditions;
16 import org.opendaylight.controller.cluster.datastore.messages.DataChanged;
17 import org.opendaylight.controller.cluster.datastore.messages.DataChangedReply;
18 import org.opendaylight.controller.cluster.datastore.messages.EnableNotification;
19 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
20 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
22 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
24 public class DataChangeListener extends AbstractUntypedActor {
25 private final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener;
26 private volatile boolean notificationsEnabled = false;
28 public DataChangeListener(AsyncDataChangeListener<YangInstanceIdentifier,
29 NormalizedNode<?, ?>> listener) {
30 this.listener = Preconditions.checkNotNull(listener, "listener should not be null");
33 @Override public void handleReceive(Object message) throws Exception {
34 if(message instanceof DataChanged){
36 } else if(message instanceof EnableNotification){
37 enableNotification((EnableNotification) message);
41 private void enableNotification(EnableNotification message) {
42 notificationsEnabled = message.isEnabled();
45 private void dataChanged(Object message) {
47 // Do nothing if notifications are not enabled
48 if(!notificationsEnabled){
52 DataChanged reply = (DataChanged) message;
53 AsyncDataChangeEvent<YangInstanceIdentifier, NormalizedNode<?, ?>>
54 change = reply.getChange();
55 this.listener.onDataChanged(change);
57 if(getSender() != null){
58 getSender().tell(new DataChangedReply(), getSelf());
62 public static Props props(final AsyncDataChangeListener<YangInstanceIdentifier,
63 NormalizedNode<?, ?>> listener) {
64 return Props.create(new DataChangeListenerCreator(listener));
67 private static class DataChangeListenerCreator implements Creator<DataChangeListener> {
68 private static final long serialVersionUID = 1L;
70 final AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener;
72 DataChangeListenerCreator(
73 AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>> listener) {
74 this.listener = listener;
78 public DataChangeListener create() throws Exception {
79 return new DataChangeListener(listener);