1 /*
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.apache.hadoop.hbase.replication;
20
21 import java.util.List;
22
23 import org.apache.hadoop.hbase.classification.InterfaceAudience;
24
25 /**
26 * The replication listener interface can be implemented if a class needs to subscribe to events
27 * generated by the ReplicationTracker. These events include things like addition/deletion of peer
28 * clusters or failure of a local region server. To receive events, the class also needs to register
29 * itself with a Replication Tracker.
30 */
31 @InterfaceAudience.Private
32 public interface ReplicationListener {
33
34 /**
35 * A region server has been removed from the local cluster
36 * @param regionServer the removed region server
37 */
38 public void regionServerRemoved(String regionServer);
39
40 /**
41 * A peer cluster has been removed (i.e. unregistered) from replication.
42 * @param peerId The peer id of the cluster that has been removed
43 */
44 public void peerRemoved(String peerId);
45
46 /**
47 * The list of registered peer clusters has changed.
48 * @param peerIds A list of all currently registered peer clusters
49 */
50 public void peerListChanged(List<String> peerIds);
51 }