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.chukwa.extraction.demux.processor.reducer;
19
20
21 import java.io.IOException;
22 import java.util.Iterator;
23 import org.apache.hadoop.chukwa.extraction.engine.ChukwaRecord;
24 import org.apache.hadoop.chukwa.extraction.engine.ChukwaRecordKey;
25 import org.apache.hadoop.mapred.OutputCollector;
26 import org.apache.hadoop.mapred.Reporter;
27
28 public class IdentityReducer implements ReduceProcessor {
29
30 @Override
31 public String getDataType() {
32 // TODO Auto-generated method stub
33 return null;
34 }
35
36 @Override
37 public void process(ChukwaRecordKey key, Iterator<ChukwaRecord> values,
38 OutputCollector<ChukwaRecordKey, ChukwaRecord> output, Reporter reporter) {
39 while (values.hasNext()) {
40 try {
41 output.collect(key, values.next());
42 } catch (IOException e) {
43 e.printStackTrace();
44 }
45 }
46 }
47
48 }