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.IOException; |
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22 | import java.util.Random; |
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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 | import org.apache.hadoop.io.SequenceFile.CompressionType; |
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27 | |
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28 | import junit.framework.TestCase; |
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29 | import org.apache.commons.logging.*; |
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30 | |
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31 | public class TestSequenceFileAsBinaryOutputFormat extends TestCase { |
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32 | private static final Log LOG = |
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33 | LogFactory.getLog(TestSequenceFileAsBinaryOutputFormat.class.getName()); |
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34 | |
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35 | private static final int RECORDS = 10000; |
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36 | // A random task attempt id for testing. |
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37 | private static final String attempt = "attempt_200707121733_0001_m_000000_0"; |
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38 | |
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39 | public void testBinary() throws IOException { |
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40 | JobConf job = new JobConf(); |
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41 | FileSystem fs = FileSystem.getLocal(job); |
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42 | |
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43 | Path dir = |
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44 | new Path(new Path(new Path(System.getProperty("test.build.data",".")), |
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45 | FileOutputCommitter.TEMP_DIR_NAME), "_" + attempt); |
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46 | Path file = new Path(dir, "testbinary.seq"); |
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47 | Random r = new Random(); |
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48 | long seed = r.nextLong(); |
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49 | r.setSeed(seed); |
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50 | |
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51 | fs.delete(dir, true); |
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52 | if (!fs.mkdirs(dir)) { |
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53 | fail("Failed to create output directory"); |
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54 | } |
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55 | |
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56 | job.set("mapred.task.id", attempt); |
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57 | FileOutputFormat.setOutputPath(job, dir.getParent().getParent()); |
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58 | FileOutputFormat.setWorkOutputPath(job, dir); |
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59 | |
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60 | SequenceFileAsBinaryOutputFormat.setSequenceFileOutputKeyClass(job, |
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61 | IntWritable.class ); |
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62 | SequenceFileAsBinaryOutputFormat.setSequenceFileOutputValueClass(job, |
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63 | DoubleWritable.class ); |
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64 | |
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65 | SequenceFileAsBinaryOutputFormat.setCompressOutput(job, true); |
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66 | SequenceFileAsBinaryOutputFormat.setOutputCompressionType(job, |
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67 | CompressionType.BLOCK); |
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68 | |
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69 | BytesWritable bkey = new BytesWritable(); |
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70 | BytesWritable bval = new BytesWritable(); |
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71 | |
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72 | |
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73 | RecordWriter <BytesWritable, BytesWritable> writer = |
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74 | new SequenceFileAsBinaryOutputFormat().getRecordWriter(fs, |
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75 | job, file.toString(), |
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76 | Reporter.NULL); |
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77 | |
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78 | IntWritable iwritable = new IntWritable(); |
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79 | DoubleWritable dwritable = new DoubleWritable(); |
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80 | DataOutputBuffer outbuf = new DataOutputBuffer(); |
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81 | LOG.info("Creating data by SequenceFileAsBinaryOutputFormat"); |
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82 | try { |
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83 | for (int i = 0; i < RECORDS; ++i) { |
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84 | iwritable = new IntWritable(r.nextInt()); |
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85 | iwritable.write(outbuf); |
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86 | bkey.set(outbuf.getData(), 0, outbuf.getLength()); |
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87 | outbuf.reset(); |
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88 | dwritable = new DoubleWritable(r.nextDouble()); |
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89 | dwritable.write(outbuf); |
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90 | bval.set(outbuf.getData(), 0, outbuf.getLength()); |
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91 | outbuf.reset(); |
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92 | writer.write(bkey, bval); |
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93 | } |
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94 | } finally { |
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95 | writer.close(Reporter.NULL); |
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96 | } |
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97 | |
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98 | InputFormat<IntWritable,DoubleWritable> iformat = |
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99 | new SequenceFileInputFormat<IntWritable,DoubleWritable>(); |
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100 | int count = 0; |
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101 | r.setSeed(seed); |
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102 | DataInputBuffer buf = new DataInputBuffer(); |
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103 | final int NUM_SPLITS = 3; |
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104 | SequenceFileInputFormat.addInputPath(job, file); |
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105 | LOG.info("Reading data by SequenceFileInputFormat"); |
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106 | for (InputSplit split : iformat.getSplits(job, NUM_SPLITS)) { |
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107 | RecordReader<IntWritable,DoubleWritable> reader = |
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108 | iformat.getRecordReader(split, job, Reporter.NULL); |
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109 | try { |
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110 | int sourceInt; |
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111 | double sourceDouble; |
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112 | while (reader.next(iwritable, dwritable)) { |
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113 | sourceInt = r.nextInt(); |
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114 | sourceDouble = r.nextDouble(); |
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115 | assertEquals( |
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116 | "Keys don't match: " + "*" + iwritable.get() + ":" + |
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117 | sourceInt + "*", |
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118 | sourceInt, iwritable.get()); |
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119 | assertTrue( |
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120 | "Vals don't match: " + "*" + dwritable.get() + ":" + |
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121 | sourceDouble + "*", |
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122 | Double.compare(dwritable.get(), sourceDouble) == 0 ); |
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123 | ++count; |
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124 | } |
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125 | } finally { |
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126 | reader.close(); |
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127 | } |
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128 | } |
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129 | assertEquals("Some records not found", RECORDS, count); |
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130 | } |
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131 | |
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132 | public void testSequenceOutputClassDefaultsToMapRedOutputClass() |
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133 | throws IOException { |
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134 | JobConf job = new JobConf(); |
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135 | FileSystem fs = FileSystem.getLocal(job); |
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136 | |
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137 | // Setting Random class to test getSequenceFileOutput{Key,Value}Class |
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138 | job.setOutputKeyClass(FloatWritable.class); |
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139 | job.setOutputValueClass(BooleanWritable.class); |
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140 | |
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141 | assertEquals("SequenceFileOutputKeyClass should default to ouputKeyClass", |
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142 | FloatWritable.class, |
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143 | SequenceFileAsBinaryOutputFormat.getSequenceFileOutputKeyClass( |
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144 | job)); |
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145 | assertEquals("SequenceFileOutputValueClass should default to " |
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146 | + "ouputValueClass", |
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147 | BooleanWritable.class, |
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148 | SequenceFileAsBinaryOutputFormat.getSequenceFileOutputValueClass( |
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149 | job)); |
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150 | |
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151 | SequenceFileAsBinaryOutputFormat.setSequenceFileOutputKeyClass(job, |
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152 | IntWritable.class ); |
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153 | SequenceFileAsBinaryOutputFormat.setSequenceFileOutputValueClass(job, |
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154 | DoubleWritable.class ); |
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155 | |
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156 | assertEquals("SequenceFileOutputKeyClass not updated", |
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157 | IntWritable.class, |
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158 | SequenceFileAsBinaryOutputFormat.getSequenceFileOutputKeyClass( |
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159 | job)); |
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160 | assertEquals("SequenceFileOutputValueClass not updated", |
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161 | DoubleWritable.class, |
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162 | SequenceFileAsBinaryOutputFormat.getSequenceFileOutputValueClass( |
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163 | job)); |
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164 | } |
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165 | |
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166 | public void testcheckOutputSpecsForbidRecordCompression() throws IOException { |
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167 | JobConf job = new JobConf(); |
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168 | FileSystem fs = FileSystem.getLocal(job); |
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169 | Path dir = new Path(System.getProperty("test.build.data",".") + "/mapred"); |
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170 | Path outputdir = new Path(System.getProperty("test.build.data",".") |
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171 | + "/output"); |
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172 | |
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173 | fs.delete(dir, true); |
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174 | fs.delete(outputdir, true); |
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175 | if (!fs.mkdirs(dir)) { |
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176 | fail("Failed to create output directory"); |
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177 | } |
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178 | |
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179 | FileOutputFormat.setWorkOutputPath(job, dir); |
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180 | |
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181 | // Without outputpath, FileOutputFormat.checkoutputspecs will throw |
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182 | // InvalidJobConfException |
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183 | FileOutputFormat.setOutputPath(job, outputdir); |
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184 | |
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185 | // SequenceFileAsBinaryOutputFormat doesn't support record compression |
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186 | // It should throw an exception when checked by checkOutputSpecs |
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187 | SequenceFileAsBinaryOutputFormat.setCompressOutput(job, true); |
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188 | |
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189 | SequenceFileAsBinaryOutputFormat.setOutputCompressionType(job, |
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190 | CompressionType.BLOCK); |
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191 | try { |
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192 | new SequenceFileAsBinaryOutputFormat().checkOutputSpecs(fs, job); |
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193 | } catch (Exception e) { |
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194 | fail("Block compression should be allowed for " |
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195 | + "SequenceFileAsBinaryOutputFormat:" |
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196 | + "Caught " + e.getClass().getName()); |
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197 | } |
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198 | |
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199 | SequenceFileAsBinaryOutputFormat.setOutputCompressionType(job, |
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200 | CompressionType.RECORD); |
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201 | try { |
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202 | new SequenceFileAsBinaryOutputFormat().checkOutputSpecs(fs, job); |
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203 | fail("Record compression should not be allowed for " |
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204 | +"SequenceFileAsBinaryOutputFormat"); |
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205 | } catch (InvalidJobConfException ie) { |
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206 | // expected |
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207 | } catch (Exception e) { |
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208 | fail("Expected " + InvalidJobConfException.class.getName() |
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209 | + "but caught " + e.getClass().getName() ); |
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210 | } |
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211 | } |
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212 | } |
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