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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  
20  package org.apache.hadoop.hbase.replication.regionserver;
21  
22  import java.io.IOException;
23  import java.util.List;
24  
25  import org.apache.commons.logging.Log;
26  import org.apache.commons.logging.LogFactory;
27  import org.apache.hadoop.conf.Configuration;
28  import org.apache.hadoop.fs.Path;
29  import org.apache.hadoop.hbase.classification.InterfaceAudience;
30  import org.apache.hadoop.hbase.HBaseInterfaceAudience;
31  import org.apache.hadoop.hbase.HConstants;
32  import org.apache.hadoop.hbase.coprocessor.BaseRegionObserver;
33  import org.apache.hadoop.hbase.coprocessor.ObserverContext;
34  import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
35  import org.apache.hadoop.hbase.regionserver.HRegionServer;
36  import org.apache.hadoop.hbase.util.Pair;
37  
38  /**
39   * An Observer to facilitate replication operations
40   */
41  
42  @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)
43  public class ReplicationObserver extends BaseRegionObserver {
44    private static final Log LOG = LogFactory.getLog(ReplicationObserver.class);
45  
46    @Override
47    public void preCommitStoreFile(final ObserverContext<RegionCoprocessorEnvironment> ctx,
48        final byte[] family, final List<Pair<Path, Path>> pairs) throws IOException {
49      RegionCoprocessorEnvironment env = ctx.getEnvironment();
50      Configuration c = env.getConfiguration();
51      if (pairs == null
52          || pairs.isEmpty()
53          || !c.getBoolean(HConstants.REPLICATION_BULKLOAD_ENABLE_KEY,
54            HConstants.REPLICATION_BULKLOAD_ENABLE_DEFAULT)) {
55        LOG.debug("Skipping recording bulk load entries in preCommitStoreFile for bulkloaded "
56            + "data replication.");
57        return;
58      }
59      HRegionServer rs = (HRegionServer) env.getRegionServerServices();
60      Replication rep = (Replication) rs.getReplicationSourceService();
61      rep.addHFileRefsToQueue(env.getRegionInfo().getTable(), family, pairs);
62    }
63  }