001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.regionserver; 019 020import java.io.IOException; 021import org.apache.hadoop.fs.FileSystem; 022import org.apache.hadoop.fs.Path; 023import org.apache.hadoop.hbase.Server; 024import org.apache.hadoop.hbase.replication.regionserver.ReplicationLoad; 025import org.apache.hadoop.hbase.wal.WALFactory; 026import org.apache.yetus.audience.InterfaceAudience; 027 028/** 029 * Gateway to Cluster Replication. Used by 030 * {@link org.apache.hadoop.hbase.regionserver.HRegionServer}. One such application is a 031 * cross-datacenter replication service that can keep two hbase clusters in sync. 032 */ 033@InterfaceAudience.Private 034public interface ReplicationService { 035 /** 036 * Initializes the replication service object. 037 */ 038 void initialize(Server rs, FileSystem fs, Path logdir, Path oldLogDir, WALFactory walFactory) 039 throws IOException; 040 041 /** 042 * Start replication services. 043 */ 044 void startReplicationService() throws IOException; 045 046 /** 047 * Stops replication service. 048 */ 049 void stopReplicationService(); 050 051 /** 052 * Refresh and Get ReplicationLoad 053 */ 054 ReplicationLoad refreshAndGetReplicationLoad(); 055}