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.regionserver; 20 21 import java.io.IOException; 22 23 import org.apache.hadoop.hbase.Server; 24 import org.apache.hadoop.classification.InterfaceAudience; 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 @InterfaceAudience.Private 35 public interface ReplicationService { 36 37 /** 38 * Initializes the replication service object. 39 * @throws IOException 40 */ 41 void initialize( 42 Server rs, FileSystem fs, Path logdir, Path oldLogDir 43 ) throws IOException; 44 45 /** 46 * Start replication services. 47 * @throws IOException 48 */ 49 void startReplicationService() throws IOException; 50 51 /** 52 * Stops replication service. 53 */ 54 void stopReplicationService(); 55 }