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.lib; |
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19 | |
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20 | import org.apache.hadoop.fs.FileSystem; |
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21 | import org.apache.hadoop.fs.Path; |
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22 | import org.apache.hadoop.io.LongWritable; |
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23 | import org.apache.hadoop.io.Text; |
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24 | import org.apache.hadoop.mapred.*; |
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25 | |
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26 | import java.io.DataOutputStream; |
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27 | import java.io.IOException; |
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28 | import java.util.Iterator; |
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29 | |
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30 | public class TestChainMapReduce extends HadoopTestCase { |
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31 | |
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32 | private static Path getFlagDir(boolean local) { |
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33 | Path flagDir = new Path("testing/chain/flags"); |
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34 | |
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35 | // Hack for local FS that does not have the concept of a 'mounting point' |
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36 | if (local) { |
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37 | String localPathRoot = System.getProperty("test.build.data", "/tmp") |
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38 | .replace(' ', '+'); |
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39 | flagDir = new Path(localPathRoot, flagDir); |
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40 | } |
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41 | return flagDir; |
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42 | } |
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43 | |
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44 | private static void cleanFlags(JobConf conf) throws IOException { |
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45 | FileSystem fs = FileSystem.get(conf); |
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46 | fs.delete(getFlagDir(conf.getBoolean("localFS", true)), true); |
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47 | fs.mkdirs(getFlagDir(conf.getBoolean("localFS", true))); |
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48 | } |
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49 | |
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50 | private static void writeFlag(JobConf conf, String flag) throws IOException { |
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51 | FileSystem fs = FileSystem.get(conf); |
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52 | if (getFlag(conf, flag)) { |
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53 | fail("Flag " + flag + " already exists"); |
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54 | } |
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55 | DataOutputStream file = |
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56 | fs.create(new Path(getFlagDir(conf.getBoolean("localFS", true)), flag)); |
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57 | file.close(); |
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58 | } |
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59 | |
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60 | private static boolean getFlag(JobConf conf, String flag) throws IOException { |
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61 | FileSystem fs = FileSystem.get(conf); |
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62 | return fs |
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63 | .exists(new Path(getFlagDir(conf.getBoolean("localFS", true)), flag)); |
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64 | } |
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65 | |
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66 | public TestChainMapReduce() throws IOException { |
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67 | super(HadoopTestCase.LOCAL_MR, HadoopTestCase.LOCAL_FS, 1, 1); |
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68 | } |
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69 | |
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70 | public void testChain() throws Exception { |
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71 | Path inDir = new Path("testing/chain/input"); |
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72 | Path outDir = new Path("testing/chain/output"); |
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73 | |
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74 | // Hack for local FS that does not have the concept of a 'mounting point' |
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75 | if (isLocalFS()) { |
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76 | String localPathRoot = System.getProperty("test.build.data", "/tmp") |
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77 | .replace(' ', '+'); |
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78 | inDir = new Path(localPathRoot, inDir); |
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79 | outDir = new Path(localPathRoot, outDir); |
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80 | } |
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81 | |
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82 | |
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83 | JobConf conf = createJobConf(); |
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84 | conf.setBoolean("localFS", isLocalFS()); |
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85 | |
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86 | cleanFlags(conf); |
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87 | |
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88 | FileSystem fs = FileSystem.get(conf); |
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89 | |
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90 | fs.delete(outDir, true); |
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91 | if (!fs.mkdirs(inDir)) { |
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92 | throw new IOException("Mkdirs failed to create " + inDir.toString()); |
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93 | } |
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94 | |
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95 | DataOutputStream file = fs.create(new Path(inDir, "part-0")); |
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96 | file.writeBytes("1\n2\n"); |
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97 | file.close(); |
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98 | |
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99 | conf.setJobName("chain"); |
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100 | conf.setInputFormat(TextInputFormat.class); |
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101 | conf.setOutputFormat(TextOutputFormat.class); |
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102 | |
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103 | conf.set("a", "X"); |
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104 | |
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105 | JobConf mapAConf = new JobConf(false); |
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106 | mapAConf.set("a", "A"); |
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107 | ChainMapper.addMapper(conf, AMap.class, LongWritable.class, Text.class, |
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108 | LongWritable.class, Text.class, true, mapAConf); |
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109 | |
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110 | ChainMapper.addMapper(conf, BMap.class, LongWritable.class, Text.class, |
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111 | LongWritable.class, Text.class, false, null); |
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112 | |
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113 | JobConf reduceConf = new JobConf(false); |
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114 | reduceConf.set("a", "C"); |
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115 | ChainReducer.setReducer(conf, CReduce.class, LongWritable.class, Text.class, |
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116 | LongWritable.class, Text.class, true, reduceConf); |
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117 | |
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118 | ChainReducer.addMapper(conf, DMap.class, LongWritable.class, Text.class, |
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119 | LongWritable.class, Text.class, false, null); |
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120 | |
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121 | JobConf mapEConf = new JobConf(false); |
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122 | mapEConf.set("a", "E"); |
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123 | ChainReducer.addMapper(conf, EMap.class, LongWritable.class, Text.class, |
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124 | LongWritable.class, Text.class, true, mapEConf); |
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125 | |
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126 | FileInputFormat.setInputPaths(conf, inDir); |
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127 | FileOutputFormat.setOutputPath(conf, outDir); |
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128 | |
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129 | JobClient jc = new JobClient(conf); |
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130 | RunningJob job = jc.submitJob(conf); |
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131 | while (!job.isComplete()) { |
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132 | Thread.sleep(100); |
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133 | } |
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134 | |
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135 | assertTrue(getFlag(conf, "configure.A")); |
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136 | assertTrue(getFlag(conf, "configure.B")); |
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137 | assertTrue(getFlag(conf, "configure.C")); |
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138 | assertTrue(getFlag(conf, "configure.D")); |
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139 | assertTrue(getFlag(conf, "configure.E")); |
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140 | |
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141 | assertTrue(getFlag(conf, "map.A.value.1")); |
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142 | assertTrue(getFlag(conf, "map.A.value.2")); |
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143 | assertTrue(getFlag(conf, "map.B.value.1")); |
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144 | assertTrue(getFlag(conf, "map.B.value.2")); |
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145 | assertTrue(getFlag(conf, "reduce.C.value.2")); |
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146 | assertTrue(getFlag(conf, "reduce.C.value.1")); |
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147 | assertTrue(getFlag(conf, "map.D.value.1")); |
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148 | assertTrue(getFlag(conf, "map.D.value.2")); |
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149 | assertTrue(getFlag(conf, "map.E.value.1")); |
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150 | assertTrue(getFlag(conf, "map.E.value.2")); |
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151 | |
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152 | assertTrue(getFlag(conf, "close.A")); |
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153 | assertTrue(getFlag(conf, "close.B")); |
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154 | assertTrue(getFlag(conf, "close.C")); |
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155 | assertTrue(getFlag(conf, "close.D")); |
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156 | assertTrue(getFlag(conf, "close.E")); |
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157 | } |
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158 | |
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159 | public static class AMap extends IDMap { |
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160 | public AMap() { |
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161 | super("A", "A", true); |
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162 | } |
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163 | } |
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164 | |
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165 | public static class BMap extends IDMap { |
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166 | public BMap() { |
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167 | super("B", "X", false); |
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168 | } |
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169 | } |
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170 | |
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171 | public static class CReduce extends IDReduce { |
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172 | public CReduce() { |
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173 | super("C", "C"); |
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174 | } |
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175 | } |
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176 | |
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177 | public static class DMap extends IDMap { |
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178 | public DMap() { |
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179 | super("D", "X", false); |
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180 | } |
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181 | } |
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182 | |
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183 | public static class EMap extends IDMap { |
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184 | public EMap() { |
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185 | super("E", "E", true); |
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186 | } |
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187 | } |
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188 | |
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189 | public static class IDMap |
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190 | implements Mapper<LongWritable, Text, LongWritable, Text> { |
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191 | private JobConf conf; |
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192 | private String name; |
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193 | private String prop; |
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194 | private boolean byValue; |
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195 | |
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196 | public IDMap(String name, String prop, boolean byValue) { |
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197 | this.name = name; |
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198 | this.prop = prop; |
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199 | this.byValue = byValue; |
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200 | } |
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201 | |
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202 | public void configure(JobConf conf) { |
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203 | this.conf = conf; |
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204 | assertEquals(prop, conf.get("a")); |
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205 | try { |
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206 | writeFlag(conf, "configure." + name); |
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207 | } catch (IOException ex) { |
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208 | throw new RuntimeException(ex); |
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209 | } |
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210 | } |
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211 | |
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212 | public void map(LongWritable key, Text value, |
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213 | OutputCollector<LongWritable, Text> output, |
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214 | Reporter reporter) throws IOException { |
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215 | writeFlag(conf, "map." + name + ".value." + value); |
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216 | key.set(10); |
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217 | output.collect(key, value); |
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218 | if (byValue) { |
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219 | assertEquals(10, key.get()); |
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220 | } else { |
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221 | assertNotSame(10, key.get()); |
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222 | } |
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223 | key.set(11); |
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224 | } |
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225 | |
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226 | public void close() throws IOException { |
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227 | try { |
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228 | writeFlag(conf, "close." + name); |
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229 | } catch (IOException ex) { |
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230 | throw new RuntimeException(ex); |
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231 | } |
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232 | } |
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233 | } |
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234 | |
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235 | public static class IDReduce |
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236 | implements Reducer<LongWritable, Text, LongWritable, Text> { |
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237 | |
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238 | private JobConf conf; |
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239 | private String name; |
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240 | private String prop; |
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241 | private boolean byValue = false; |
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242 | |
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243 | public IDReduce(String name, String prop) { |
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244 | this.name = name; |
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245 | this.prop = prop; |
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246 | } |
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247 | |
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248 | public void configure(JobConf conf) { |
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249 | this.conf = conf; |
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250 | assertEquals(prop, conf.get("a")); |
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251 | try { |
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252 | writeFlag(conf, "configure." + name); |
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253 | } catch (IOException ex) { |
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254 | throw new RuntimeException(ex); |
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255 | } |
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256 | } |
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257 | |
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258 | public void reduce(LongWritable key, Iterator<Text> values, |
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259 | OutputCollector<LongWritable, Text> output, |
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260 | Reporter reporter) throws IOException { |
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261 | while (values.hasNext()) { |
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262 | Text value = values.next(); |
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263 | writeFlag(conf, "reduce." + name + ".value." + value); |
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264 | key.set(10); |
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265 | output.collect(key, value); |
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266 | if (byValue) { |
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267 | assertEquals(10, key.get()); |
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268 | } else { |
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269 | assertNotSame(10, key.get()); |
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270 | } |
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271 | key.set(11); |
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272 | } |
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273 | } |
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274 | |
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275 | public void close() throws IOException { |
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276 | try { |
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277 | writeFlag(conf, "close." + name); |
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278 | } catch (IOException ex) { |
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279 | throw new RuntimeException(ex); |
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280 | } |
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281 | } |
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282 | } |
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283 | |
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284 | } |
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