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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.regionserver.wal.WALActionsListener;
25  
26  /**
27   * A source for a replication stream has to expose this service.
28   * This service allows an application to hook into the
29   * regionserver and watch for new transactions.
30   */
31  public interface ReplicationSourceService extends ReplicationService {
32  
33    /**
34     * Returns a WALObserver for the service. This is needed to 
35     * observe log rolls and log archival events.
36     */
37    public WALActionsListener getWALActionsListener();
38  }