1 /* 2 * Copyright 2011 The Apache Software Foundation 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 package org.apache.hadoop.hbase.regionserver; 21 22 import java.io.IOException; 23 24 import org.apache.hadoop.hbase.Server; 25 import org.apache.hadoop.fs.FileSystem; 26 import org.apache.hadoop.fs.Path; 27 28 /** 29 * Gateway to Cluster Replication. 30 * Used by {@link org.apache.hadoop.hbase.regionserver.HRegionServer}. 31 * One such application is a cross-datacenter 32 * replication service that can keep two hbase clusters in sync. 33 */ 34 public interface ReplicationService { 35 36 /** 37 * Initializes the replication service object. 38 * @throws IOException 39 */ 40 public void initialize(Server rs, FileSystem fs, Path logdir, 41 Path oldLogDir) throws IOException; 42 43 /** 44 * Start replication services. 45 * @throws IOException 46 */ 47 public void startReplicationService() throws IOException; 48 49 /** 50 * Stops replication service. 51 */ 52 public void stopReplicationService(); 53 }