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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