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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.hbase.regionserver;
19  
20  import java.io.IOException;
21  import java.util.ArrayList;
22  import java.util.List;
23  import java.util.Locale;
24  import java.util.UUID;
25
26  import org.apache.hadoop.hbase.classification.InterfaceAudience;
27  import org.apache.hadoop.hbase.classification.InterfaceStability;
28  import org.apache.hadoop.hbase.HBaseInterfaceAudience;
29  import org.apache.hadoop.hbase.client.Durability;
30  import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
31
32  import com.google.protobuf.Message;
33
34  /**
35   * Base class for RowProcessor with some default implementations.
36   */
37  @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.COPROC)
38  @InterfaceStability.Evolving
39  public abstract class BaseRowProcessor<S extends Message,T extends Message>
40  implements RowProcessor<S,T> {
41
42    @Override
43    public void preProcess(HRegion region, WALEdit walEdit) throws IOException {
44    }
45
46    @Override
47    public void preBatchMutate(HRegion region, WALEdit walEdit) throws IOException {
48    }
49
50    @Override
51    public void postBatchMutate(HRegion region) throws IOException {
52    }
53
54    @Override
55    public void postProcess(HRegion region, WALEdit walEdit, boolean success) throws IOException {
56    }
57
58    @Override
59    public List<UUID> getClusterIds() {
60      return new ArrayList<UUID>();
61    }
62
63    @Override
64    public String getName() {
65      return this.getClass().getSimpleName().toLowerCase(Locale.ROOT);
66    }
67
68    @Override
69    public Durability useDurability() {
70      return Durability.USE_DEFAULT;
71    }
72  }