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 | |
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19 | package org.apache.hadoop.mapred.lib; |
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20 | |
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21 | import java.io.*; |
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22 | |
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23 | import org.apache.hadoop.fs.FileSystem; |
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24 | import org.apache.hadoop.fs.FileUtil; |
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25 | import org.apache.hadoop.fs.Path; |
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26 | import org.apache.hadoop.io.LongWritable; |
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27 | import org.apache.hadoop.io.Text; |
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28 | import org.apache.hadoop.mapred.FileInputFormat; |
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29 | import org.apache.hadoop.mapred.FileOutputFormat; |
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30 | import org.apache.hadoop.mapred.HadoopTestCase; |
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31 | import org.apache.hadoop.mapred.JobClient; |
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32 | import org.apache.hadoop.mapred.JobConf; |
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33 | import org.apache.hadoop.mapred.OutputLogFilter; |
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34 | import org.apache.hadoop.mapred.RunningJob; |
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35 | import org.apache.hadoop.mapred.TextInputFormat; |
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36 | import org.apache.hadoop.mapred.TextOutputFormat; |
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37 | |
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38 | |
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39 | public class TestKeyFieldBasedComparator extends HadoopTestCase { |
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40 | JobConf conf; |
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41 | JobConf localConf; |
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42 | |
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43 | String line1 = "123 -123 005120 123.9 0.01 0.18 010 10.0 4444.1 011 011 234"; |
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44 | String line2 = "134 -12 005100 123.10 -1.01 0.19 02 10.1 4444"; |
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45 | |
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46 | public TestKeyFieldBasedComparator() throws IOException { |
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47 | super(HadoopTestCase.LOCAL_MR, HadoopTestCase.LOCAL_FS, 1, 1); |
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48 | conf = createJobConf(); |
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49 | localConf = createJobConf(); |
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50 | localConf.set("map.output.key.field.separator", " "); |
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51 | } |
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52 | public void configure(String keySpec, int expect) throws Exception { |
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53 | Path testdir = new Path("build/test/test.mapred.spill"); |
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54 | Path inDir = new Path(testdir, "in"); |
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55 | Path outDir = new Path(testdir, "out"); |
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56 | FileSystem fs = getFileSystem(); |
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57 | fs.delete(testdir, true); |
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58 | conf.setInputFormat(TextInputFormat.class); |
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59 | FileInputFormat.setInputPaths(conf, inDir); |
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60 | FileOutputFormat.setOutputPath(conf, outDir); |
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61 | conf.setOutputKeyClass(Text.class); |
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62 | conf.setOutputValueClass(LongWritable.class); |
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63 | |
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64 | conf.setNumMapTasks(1); |
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65 | conf.setNumReduceTasks(2); |
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66 | |
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67 | conf.setOutputFormat(TextOutputFormat.class); |
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68 | conf.setOutputKeyComparatorClass(KeyFieldBasedComparator.class); |
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69 | conf.setKeyFieldComparatorOptions(keySpec); |
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70 | conf.setKeyFieldPartitionerOptions("-k1.1,1.1"); |
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71 | conf.set("map.output.key.field.separator", " "); |
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72 | conf.setMapperClass(InverseMapper.class); |
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73 | conf.setReducerClass(IdentityReducer.class); |
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74 | if (!fs.mkdirs(testdir)) { |
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75 | throw new IOException("Mkdirs failed to create " + testdir.toString()); |
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76 | } |
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77 | if (!fs.mkdirs(inDir)) { |
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78 | throw new IOException("Mkdirs failed to create " + inDir.toString()); |
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79 | } |
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80 | // set up input data in 2 files |
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81 | Path inFile = new Path(inDir, "part0"); |
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82 | FileOutputStream fos = new FileOutputStream(inFile.toString()); |
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83 | fos.write((line1 + "\n").getBytes()); |
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84 | fos.write((line2 + "\n").getBytes()); |
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85 | fos.close(); |
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86 | JobClient jc = new JobClient(conf); |
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87 | RunningJob r_job = jc.submitJob(conf); |
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88 | while (!r_job.isComplete()) { |
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89 | Thread.sleep(1000); |
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90 | } |
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91 | |
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92 | if (!r_job.isSuccessful()) { |
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93 | fail("Oops! The job broke due to an unexpected error"); |
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94 | } |
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95 | Path[] outputFiles = FileUtil.stat2Paths( |
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96 | getFileSystem().listStatus(outDir, |
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97 | new OutputLogFilter())); |
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98 | if (outputFiles.length > 0) { |
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99 | InputStream is = getFileSystem().open(outputFiles[0]); |
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100 | BufferedReader reader = new BufferedReader(new InputStreamReader(is)); |
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101 | String line = reader.readLine(); |
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102 | //make sure we get what we expect as the first line, and also |
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103 | //that we have two lines (both the lines must end up in the same |
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104 | //reducer since the partitioner takes the same key spec for all |
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105 | //lines |
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106 | if (expect == 1) { |
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107 | assertTrue(line.startsWith(line1)); |
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108 | } else if (expect == 2) { |
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109 | assertTrue(line.startsWith(line2)); |
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110 | } |
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111 | line = reader.readLine(); |
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112 | if (expect == 1) { |
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113 | assertTrue(line.startsWith(line2)); |
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114 | } else if (expect == 2) { |
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115 | assertTrue(line.startsWith(line1)); |
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116 | } |
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117 | reader.close(); |
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118 | } |
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119 | } |
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120 | public void testBasicUnixComparator() throws Exception { |
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121 | configure("-k1,1n", 1); |
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122 | configure("-k2,2n", 1); |
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123 | configure("-k2.2,2n", 2); |
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124 | configure("-k3.4,3n", 2); |
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125 | configure("-k3.2,3.3n -k4,4n", 2); |
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126 | configure("-k3.2,3.3n -k4,4nr", 1); |
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127 | configure("-k2.4,2.4n", 2); |
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128 | configure("-k7,7", 1); |
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129 | configure("-k7,7n", 2); |
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130 | configure("-k8,8n", 1); |
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131 | configure("-k9,9", 2); |
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132 | configure("-k11,11",2); |
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133 | configure("-k10,10",2); |
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134 | |
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135 | localTestWithoutMRJob("-k9,9", 1); |
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136 | |
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137 | localTestWithoutMRJob("-k9n", 1); |
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138 | } |
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139 | |
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140 | byte[] line1_bytes = line1.getBytes(); |
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141 | byte[] line2_bytes = line2.getBytes(); |
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142 | |
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143 | public void localTestWithoutMRJob(String keySpec, int expect) throws Exception { |
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144 | KeyFieldBasedComparator<Void, Void> keyFieldCmp = new KeyFieldBasedComparator<Void, Void>(); |
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145 | localConf.setKeyFieldComparatorOptions(keySpec); |
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146 | keyFieldCmp.configure(localConf); |
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147 | int result = keyFieldCmp.compare(line1_bytes, 0, line1_bytes.length, |
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148 | line2_bytes, 0, line2_bytes.length); |
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149 | if ((expect >= 0 && result < 0) || (expect < 0 && result >= 0)) |
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150 | fail(); |
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151 | } |
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152 | } |
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