1 /**
2 * Copyright 2010 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.mapred;
21
22 import java.io.IOException;
23 import java.util.Iterator;
24
25 import org.apache.commons.logging.Log;
26 import org.apache.commons.logging.LogFactory;
27 import org.apache.hadoop.hbase.client.Put;
28 import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
29 import org.apache.hadoop.mapred.MapReduceBase;
30 import org.apache.hadoop.mapred.OutputCollector;
31 import org.apache.hadoop.mapred.Reporter;
32
33 /**
34 * Write to table each key, record pair
35 */
36 @Deprecated
37 public class IdentityTableReduce
38 extends MapReduceBase
39 implements TableReduce<ImmutableBytesWritable, Put> {
40 @SuppressWarnings("unused")
41 private static final Log LOG =
42 LogFactory.getLog(IdentityTableReduce.class.getName());
43
44 /**
45 * No aggregation, output pairs of (key, record)
46 * @param key
47 * @param values
48 * @param output
49 * @param reporter
50 * @throws IOException
51 */
52 public void reduce(ImmutableBytesWritable key, Iterator<Put> values,
53 OutputCollector<ImmutableBytesWritable, Put> output,
54 Reporter reporter)
55 throws IOException {
56
57 while(values.hasNext()) {
58 output.collect(key, values.next());
59 }
60 }
61 }