View Javadoc

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  }