001/* 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, software 014 * distributed under the License is distributed on an "AS IS" BASIS, 015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 016 * See the License for the specific language governing permissions and 017 * limitations under the License. 018 */ 019package org.apache.hadoop.hbase.replication; 020 021import java.util.List; 022 023import org.apache.yetus.audience.InterfaceAudience; 024 025/** 026 * The replication listener interface can be implemented if a class needs to subscribe to events 027 * generated by the ReplicationTracker. These events include things like addition/deletion of peer 028 * clusters or failure of a local region server. To receive events, the class also needs to register 029 * itself with a Replication Tracker. 030 */ 031@InterfaceAudience.Private 032public interface ReplicationListener { 033 034 /** 035 * A region server has been removed from the local cluster 036 * @param regionServer the removed region server 037 */ 038 public void regionServerRemoved(String regionServer); 039 040 /** 041 * A peer cluster has been removed (i.e. unregistered) from replication. 042 * @param peerId The peer id of the cluster that has been removed 043 */ 044 public void peerRemoved(String peerId); 045 046 /** 047 * The list of registered peer clusters has changed. 048 * @param peerIds A list of all currently registered peer clusters 049 */ 050 public void peerListChanged(List<String> peerIds); 051}