Implement DataChangeListener
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / DataChangeListener.java
1 /*
2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
3  *
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
7  */
8
9 package org.opendaylight.controller.cluster.datastore;
10
11 import akka.actor.Props;
12 import akka.japi.Creator;
13 import org.opendaylight.controller.cluster.datastore.messages.DataChanged;
14 import org.opendaylight.controller.cluster.datastore.messages.DataChangedReply;
15 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
16 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
17 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
18 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
19
20 public class DataChangeListener extends AbstractUntypedActor {
21     private final AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>> listener;
22
23     public DataChangeListener(
24         AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>> listener) {
25         this.listener = listener;
26     }
27
28     @Override public void handleReceive(Object message) throws Exception {
29         if(message instanceof DataChanged){
30             DataChanged reply = (DataChanged) message;
31             AsyncDataChangeEvent<InstanceIdentifier, NormalizedNode<?, ?>>
32                 change = reply.getChange();
33             this.listener.onDataChanged(change);
34
35             if(getSender() != null){
36                 getSender().tell(new DataChangedReply(), getSelf());
37             }
38
39         }
40     }
41
42     public static Props props(final AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>> listener) {
43         return Props.create(new Creator<DataChangeListener>() {
44             @Override
45             public DataChangeListener create() throws Exception {
46                 return new DataChangeListener(listener);
47             }
48
49         });
50
51     }
52 }

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