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; |
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20 | |
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21 | import java.io.*; |
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22 | import junit.framework.TestCase; |
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23 | |
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24 | import org.apache.hadoop.fs.*; |
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25 | import org.apache.hadoop.io.*; |
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26 | |
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27 | import org.apache.hadoop.mapred.lib.*; |
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28 | |
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29 | public class TestMultipleTextOutputFormat extends TestCase { |
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30 | private static JobConf defaultConf = new JobConf(); |
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31 | |
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32 | private static FileSystem localFs = null; |
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33 | static { |
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34 | try { |
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35 | localFs = FileSystem.getLocal(defaultConf); |
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36 | } catch (IOException e) { |
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37 | throw new RuntimeException("init failure", e); |
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38 | } |
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39 | } |
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40 | |
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41 | // A random task attempt id for testing. |
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42 | private static String attempt = "attempt_200707121733_0001_m_000000_0"; |
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43 | |
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44 | private static Path workDir = |
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45 | new Path(new Path( |
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46 | new Path(System.getProperty("test.build.data", "."), |
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47 | "data"), |
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48 | FileOutputCommitter.TEMP_DIR_NAME), "_" + attempt); |
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49 | |
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50 | private static void writeData(RecordWriter<Text, Text> rw) throws IOException { |
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51 | for (int i = 10; i < 40; i++) { |
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52 | String k = "" + i; |
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53 | String v = "" + i; |
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54 | rw.write(new Text(k), new Text(v)); |
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55 | } |
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56 | } |
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57 | |
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58 | static class KeyBasedMultipleTextOutputFormat extends MultipleTextOutputFormat<Text, Text> { |
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59 | protected String generateFileNameForKeyValue(Text key, Text v, String name) { |
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60 | |
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61 | return key.toString().substring(0, 1) + "-" + name; |
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62 | } |
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63 | } |
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64 | |
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65 | private static void test1(JobConf job) throws IOException { |
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66 | FileSystem fs = FileSystem.getLocal(job); |
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67 | String name = "part-00000"; |
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68 | KeyBasedMultipleTextOutputFormat theOutputFormat = new KeyBasedMultipleTextOutputFormat(); |
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69 | RecordWriter<Text, Text> rw = theOutputFormat.getRecordWriter(fs, job, name, null); |
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70 | writeData(rw); |
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71 | rw.close(null); |
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72 | } |
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73 | |
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74 | private static void test2(JobConf job) throws IOException { |
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75 | FileSystem fs = FileSystem.getLocal(job); |
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76 | String name = "part-00000"; |
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77 | //pretend that we have input file with 1/2/3 as the suffix |
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78 | job.set("map.input.file", "1/2/3"); |
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79 | // we use the last two legs of the input file as the output file |
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80 | job.set("mapred.outputformat.numOfTrailingLegs", "2"); |
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81 | MultipleTextOutputFormat<Text, Text> theOutputFormat = new MultipleTextOutputFormat<Text, Text>(); |
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82 | RecordWriter<Text, Text> rw = theOutputFormat.getRecordWriter(fs, job, name, null); |
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83 | writeData(rw); |
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84 | rw.close(null); |
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85 | } |
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86 | |
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87 | public void testFormat() throws Exception { |
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88 | JobConf job = new JobConf(); |
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89 | job.set("mapred.task.id", attempt); |
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90 | FileOutputFormat.setOutputPath(job, workDir.getParent().getParent()); |
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91 | FileOutputFormat.setWorkOutputPath(job, workDir); |
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92 | FileSystem fs = workDir.getFileSystem(job); |
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93 | if (!fs.mkdirs(workDir)) { |
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94 | fail("Failed to create output directory"); |
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95 | } |
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96 | //System.out.printf("workdir: %s\n", workDir.toString()); |
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97 | TestMultipleTextOutputFormat.test1(job); |
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98 | TestMultipleTextOutputFormat.test2(job); |
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99 | String file_11 = "1-part-00000"; |
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100 | |
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101 | File expectedFile_11 = new File(new Path(workDir, file_11).toString()); |
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102 | |
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103 | //System.out.printf("expectedFile_11: %s\n", new Path(workDir, file_11).toString()); |
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104 | StringBuffer expectedOutput = new StringBuffer(); |
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105 | for (int i = 10; i < 20; i++) { |
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106 | expectedOutput.append(""+i).append('\t').append(""+i).append("\n"); |
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107 | } |
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108 | String output = UtilsForTests.slurp(expectedFile_11); |
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109 | //System.out.printf("File_2 output: %s\n", output); |
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110 | assertEquals(output, expectedOutput.toString()); |
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111 | |
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112 | String file_12 = "2-part-00000"; |
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113 | |
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114 | File expectedFile_12 = new File(new Path(workDir, file_12).toString()); |
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115 | //System.out.printf("expectedFile_12: %s\n", new Path(workDir, file_12).toString()); |
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116 | expectedOutput = new StringBuffer(); |
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117 | for (int i = 20; i < 30; i++) { |
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118 | expectedOutput.append(""+i).append('\t').append(""+i).append("\n"); |
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119 | } |
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120 | output = UtilsForTests.slurp(expectedFile_12); |
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121 | //System.out.printf("File_2 output: %s\n", output); |
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122 | assertEquals(output, expectedOutput.toString()); |
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123 | |
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124 | String file_13 = "3-part-00000"; |
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125 | |
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126 | File expectedFile_13 = new File(new Path(workDir, file_13).toString()); |
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127 | //System.out.printf("expectedFile_13: %s\n", new Path(workDir, file_13).toString()); |
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128 | expectedOutput = new StringBuffer(); |
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129 | for (int i = 30; i < 40; i++) { |
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130 | expectedOutput.append(""+i).append('\t').append(""+i).append("\n"); |
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131 | } |
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132 | output = UtilsForTests.slurp(expectedFile_13); |
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133 | //System.out.printf("File_2 output: %s\n", output); |
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134 | assertEquals(output, expectedOutput.toString()); |
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135 | |
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136 | String file_2 = "2/3"; |
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137 | |
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138 | File expectedFile_2 = new File(new Path(workDir, file_2).toString()); |
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139 | //System.out.printf("expectedFile_2: %s\n", new Path(workDir, file_2).toString()); |
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140 | expectedOutput = new StringBuffer(); |
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141 | for (int i = 10; i < 40; i++) { |
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142 | expectedOutput.append(""+i).append('\t').append(""+i).append("\n"); |
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143 | } |
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144 | output = UtilsForTests.slurp(expectedFile_2); |
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145 | //System.out.printf("File_2 output: %s\n", output); |
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146 | assertEquals(output, expectedOutput.toString()); |
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147 | } |
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148 | |
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149 | public static void main(String[] args) throws Exception { |
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150 | new TestMultipleTextOutputFormat().testFormat(); |
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151 | } |
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152 | } |
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