[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | package org.apache.hadoop.mapred; |
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| 19 | |
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| 20 | import java.io.BufferedReader; |
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| 21 | import java.io.IOException; |
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| 22 | import java.io.InputStream; |
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| 23 | import java.io.InputStreamReader; |
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| 24 | import java.io.OutputStream; |
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| 25 | import java.io.OutputStreamWriter; |
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| 26 | import java.io.Writer; |
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| 27 | |
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| 28 | import org.apache.hadoop.fs.FileUtil; |
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| 29 | import org.apache.hadoop.fs.Path; |
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| 30 | import org.apache.hadoop.io.LongWritable; |
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| 31 | import org.apache.hadoop.io.Text; |
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| 32 | import org.apache.hadoop.mapred.lib.IdentityMapper; |
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| 33 | import org.apache.hadoop.mapred.lib.IdentityReducer; |
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| 34 | |
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| 35 | public class TestUserDefinedCounters extends ClusterMapReduceTestCase { |
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| 36 | |
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| 37 | enum EnumCounter { MAP_RECORDS } |
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| 38 | |
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| 39 | static class CountingMapper<K, V> extends IdentityMapper<K, V> { |
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| 40 | |
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| 41 | public void map(K key, V value, |
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| 42 | OutputCollector<K, V> output, Reporter reporter) |
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| 43 | throws IOException { |
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| 44 | output.collect(key, value); |
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| 45 | reporter.incrCounter(EnumCounter.MAP_RECORDS, 1); |
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| 46 | reporter.incrCounter("StringCounter", "MapRecords", 1); |
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| 47 | } |
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| 48 | |
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| 49 | } |
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| 50 | |
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| 51 | public void testMapReduceJob() throws Exception { |
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| 52 | OutputStream os = getFileSystem().create(new Path(getInputDir(), "text.txt")); |
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| 53 | Writer wr = new OutputStreamWriter(os); |
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| 54 | wr.write("hello1\n"); |
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| 55 | wr.write("hello2\n"); |
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| 56 | wr.write("hello3\n"); |
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| 57 | wr.write("hello4\n"); |
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| 58 | wr.close(); |
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| 59 | |
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| 60 | JobConf conf = createJobConf(); |
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| 61 | conf.setJobName("counters"); |
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| 62 | |
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| 63 | conf.setInputFormat(TextInputFormat.class); |
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| 64 | |
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| 65 | conf.setMapOutputKeyClass(LongWritable.class); |
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| 66 | conf.setMapOutputValueClass(Text.class); |
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| 67 | |
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| 68 | conf.setOutputFormat(TextOutputFormat.class); |
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| 69 | conf.setOutputKeyClass(LongWritable.class); |
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| 70 | conf.setOutputValueClass(Text.class); |
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| 71 | |
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| 72 | conf.setMapperClass(CountingMapper.class); |
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| 73 | conf.setReducerClass(IdentityReducer.class); |
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| 74 | |
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| 75 | FileInputFormat.setInputPaths(conf, getInputDir()); |
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| 76 | |
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| 77 | FileOutputFormat.setOutputPath(conf, getOutputDir()); |
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| 78 | |
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| 79 | RunningJob runningJob = JobClient.runJob(conf); |
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| 80 | |
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| 81 | Path[] outputFiles = FileUtil.stat2Paths( |
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| 82 | getFileSystem().listStatus(getOutputDir(), |
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| 83 | new OutputLogFilter())); |
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| 84 | if (outputFiles.length > 0) { |
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| 85 | InputStream is = getFileSystem().open(outputFiles[0]); |
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| 86 | BufferedReader reader = new BufferedReader(new InputStreamReader(is)); |
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| 87 | String line = reader.readLine(); |
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| 88 | int counter = 0; |
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| 89 | while (line != null) { |
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| 90 | counter++; |
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| 91 | assertTrue(line.contains("hello")); |
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| 92 | line = reader.readLine(); |
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| 93 | } |
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| 94 | reader.close(); |
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| 95 | assertEquals(4, counter); |
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| 96 | } |
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| 97 | |
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| 98 | assertEquals(4, |
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| 99 | runningJob.getCounters().getCounter(EnumCounter.MAP_RECORDS)); |
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| 100 | assertEquals(4, |
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| 101 | runningJob.getCounters().getGroup("StringCounter") |
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| 102 | .getCounter("MapRecords")); |
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| 103 | } |
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| 104 | |
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| 105 | } |
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