[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 | |
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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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