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 | import org.apache.hadoop.conf.Configuration; |
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24 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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25 | import org.apache.hadoop.fs.FileSystem; |
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26 | import org.apache.hadoop.fs.FileUtil; |
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27 | import org.apache.hadoop.fs.Path; |
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28 | import org.apache.hadoop.io.IntWritable; |
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29 | import org.apache.hadoop.io.Text; |
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30 | |
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31 | /** |
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32 | * A JUnit test to test Mini Map-Reduce Cluster with multiple directories |
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33 | * and check for correct classpath |
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34 | */ |
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35 | public class TestMiniMRClasspath extends TestCase { |
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36 | |
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37 | |
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38 | static String launchWordCount(String fileSys, |
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39 | String jobTracker, |
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40 | JobConf conf, |
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41 | String input, |
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42 | int numMaps, |
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43 | int numReduces) throws IOException { |
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44 | final Path inDir = new Path("/testing/wc/input"); |
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45 | final Path outDir = new Path("/testing/wc/output"); |
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46 | FileSystem fs = FileSystem.getNamed(fileSys, conf); |
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47 | fs.delete(outDir, true); |
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48 | if (!fs.mkdirs(inDir)) { |
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49 | throw new IOException("Mkdirs failed to create " + inDir.toString()); |
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50 | } |
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51 | { |
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52 | DataOutputStream file = fs.create(new Path(inDir, "part-0")); |
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53 | file.writeBytes(input); |
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54 | file.close(); |
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55 | } |
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56 | FileSystem.setDefaultUri(conf, fileSys); |
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57 | conf.set("mapred.job.tracker", jobTracker); |
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58 | conf.setJobName("wordcount"); |
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59 | conf.setInputFormat(TextInputFormat.class); |
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60 | |
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61 | // the keys are words (strings) |
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62 | conf.setOutputKeyClass(Text.class); |
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63 | // the values are counts (ints) |
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64 | conf.setOutputValueClass(IntWritable.class); |
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65 | |
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66 | conf.set("mapred.mapper.class", "testjar.ClassWordCount$MapClass"); |
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67 | conf.set("mapred.combine.class", "testjar.ClassWordCount$Reduce"); |
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68 | conf.set("mapred.reducer.class", "testjar.ClassWordCount$Reduce"); |
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69 | FileInputFormat.setInputPaths(conf, inDir); |
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70 | FileOutputFormat.setOutputPath(conf, outDir); |
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71 | conf.setNumMapTasks(numMaps); |
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72 | conf.setNumReduceTasks(numReduces); |
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73 | //pass a job.jar already included in the hadoop build |
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74 | conf.setJar("build/test/testjar/testjob.jar"); |
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75 | JobClient.runJob(conf); |
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76 | StringBuffer result = new StringBuffer(); |
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77 | { |
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78 | Path[] parents = FileUtil.stat2Paths(fs.listStatus(outDir.getParent())); |
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79 | Path[] fileList = FileUtil.stat2Paths(fs.listStatus(outDir, |
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80 | new OutputLogFilter())); |
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81 | for(int i=0; i < fileList.length; ++i) { |
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82 | BufferedReader file = |
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83 | new BufferedReader(new InputStreamReader(fs.open(fileList[i]))); |
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84 | String line = file.readLine(); |
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85 | while (line != null) { |
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86 | result.append(line); |
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87 | result.append("\n"); |
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88 | line = file.readLine(); |
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89 | } |
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90 | file.close(); |
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91 | } |
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92 | } |
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93 | return result.toString(); |
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94 | } |
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95 | |
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96 | static String launchExternal(String fileSys, String jobTracker, JobConf conf, |
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97 | String input, int numMaps, int numReduces) |
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98 | throws IOException { |
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99 | |
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100 | final Path inDir = new Path("/testing/ext/input"); |
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101 | final Path outDir = new Path("/testing/ext/output"); |
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102 | FileSystem fs = FileSystem.getNamed(fileSys, conf); |
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103 | fs.delete(outDir, true); |
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104 | if (!fs.mkdirs(inDir)) { |
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105 | throw new IOException("Mkdirs failed to create " + inDir.toString()); |
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106 | } |
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107 | { |
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108 | DataOutputStream file = fs.create(new Path(inDir, "part-0")); |
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109 | file.writeBytes(input); |
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110 | file.close(); |
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111 | } |
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112 | FileSystem.setDefaultUri(conf, fileSys); |
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113 | conf.set("mapred.job.tracker", jobTracker); |
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114 | conf.setJobName("wordcount"); |
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115 | conf.setInputFormat(TextInputFormat.class); |
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116 | |
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117 | // the keys are counts |
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118 | conf.setOutputValueClass(IntWritable.class); |
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119 | // the values are the messages |
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120 | conf.set("mapred.output.key.class", "testjar.ExternalWritable"); |
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121 | |
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122 | FileInputFormat.setInputPaths(conf, inDir); |
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123 | FileOutputFormat.setOutputPath(conf, outDir); |
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124 | conf.setNumMapTasks(numMaps); |
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125 | conf.setNumReduceTasks(numReduces); |
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126 | |
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127 | conf.set("mapred.mapper.class", "testjar.ExternalMapperReducer"); |
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128 | conf.set("mapred.reducer.class", "testjar.ExternalMapperReducer"); |
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129 | |
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130 | //pass a job.jar already included in the hadoop build |
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131 | conf.setJar("build/test/testjar/testjob.jar"); |
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132 | JobClient.runJob(conf); |
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133 | StringBuffer result = new StringBuffer(); |
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134 | Path[] fileList = FileUtil.stat2Paths(fs.listStatus(outDir, |
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135 | new OutputLogFilter())); |
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136 | for (int i = 0; i < fileList.length; ++i) { |
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137 | BufferedReader file = new BufferedReader(new InputStreamReader( |
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138 | fs.open(fileList[i]))); |
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139 | String line = file.readLine(); |
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140 | while (line != null) { |
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141 | result.append(line); |
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142 | line = file.readLine(); |
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143 | result.append("\n"); |
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144 | } |
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145 | file.close(); |
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146 | } |
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147 | |
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148 | return result.toString(); |
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149 | } |
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150 | |
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151 | public void testClassPath() throws IOException { |
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152 | String namenode = null; |
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153 | MiniDFSCluster dfs = null; |
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154 | MiniMRCluster mr = null; |
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155 | FileSystem fileSys = null; |
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156 | try { |
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157 | final int taskTrackers = 4; |
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158 | final int jobTrackerPort = 60050; |
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159 | |
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160 | Configuration conf = new Configuration(); |
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161 | dfs = new MiniDFSCluster(conf, 1, true, null); |
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162 | fileSys = dfs.getFileSystem(); |
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163 | namenode = fileSys.getName(); |
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164 | mr = new MiniMRCluster(taskTrackers, namenode, 3); |
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165 | JobConf jobConf = new JobConf(); |
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166 | String result; |
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167 | final String jobTrackerName = "localhost:" + mr.getJobTrackerPort(); |
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168 | result = launchWordCount(namenode, jobTrackerName, jobConf, |
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169 | "The quick brown fox\nhas many silly\n" + |
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170 | "red fox sox\n", |
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171 | 3, 1); |
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172 | assertEquals("The\t1\nbrown\t1\nfox\t2\nhas\t1\nmany\t1\n" + |
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173 | "quick\t1\nred\t1\nsilly\t1\nsox\t1\n", result); |
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174 | |
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175 | } finally { |
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176 | if (dfs != null) { dfs.shutdown(); } |
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177 | if (mr != null) { mr.shutdown(); |
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178 | } |
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179 | } |
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180 | } |
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181 | |
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182 | public void testExternalWritable() |
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183 | throws IOException { |
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184 | |
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185 | String namenode = null; |
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186 | MiniDFSCluster dfs = null; |
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187 | MiniMRCluster mr = null; |
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188 | FileSystem fileSys = null; |
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189 | |
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190 | try { |
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191 | |
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192 | final int taskTrackers = 4; |
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193 | |
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194 | Configuration conf = new Configuration(); |
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195 | dfs = new MiniDFSCluster(conf, 1, true, null); |
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196 | fileSys = dfs.getFileSystem(); |
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197 | namenode = fileSys.getName(); |
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198 | mr = new MiniMRCluster(taskTrackers, namenode, 3); |
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199 | JobConf jobConf = new JobConf(); |
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200 | String result; |
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201 | final String jobTrackerName = "localhost:" + mr.getJobTrackerPort(); |
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202 | |
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203 | result = launchExternal(namenode, jobTrackerName, jobConf, |
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204 | "Dennis was here!\nDennis again!", |
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205 | 3, 1); |
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206 | assertEquals("Dennis again!\t1\nDennis was here!\t1\n", result); |
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207 | |
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208 | } |
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209 | finally { |
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210 | if (dfs != null) { dfs.shutdown(); } |
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211 | if (mr != null) { mr.shutdown(); |
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212 | } |
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213 | } |
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214 | } |
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215 | |
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216 | } |
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