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 package org.apache.hadoop.hbase.mapred;
20
21 import java.io.IOException;
22 import java.util.Iterator;
23
24 import org.apache.commons.logging.Log;
25 import org.apache.commons.logging.LogFactory;
26 import org.apache.hadoop.hbase.client.Put;
27 import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
28 import org.apache.hadoop.mapred.MapReduceBase;
29 import org.apache.hadoop.mapred.OutputCollector;
30 import org.apache.hadoop.mapred.Reporter;
31
32 /**
33 * Write to table each key, record pair
34 */
35 @Deprecated
36 public class IdentityTableReduce
37 extends MapReduceBase
38 implements TableReduce<ImmutableBytesWritable, Put> {
39 @SuppressWarnings("unused")
40 private static final Log LOG =
41 LogFactory.getLog(IdentityTableReduce.class.getName());
42
43 /**
44 * No aggregation, output pairs of (key, record)
45 * @param key
46 * @param values
47 * @param output
48 * @param reporter
49 * @throws IOException
50 */
51 public void reduce(ImmutableBytesWritable key, Iterator<Put> values,
52 OutputCollector<ImmutableBytesWritable, Put> output,
53 Reporter reporter)
54 throws IOException {
55
56 while(values.hasNext()) {
57 output.collect(key, values.next());
58 }
59 }
60 }