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 java.util.*; |
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23 | import junit.framework.TestCase; |
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24 | |
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25 | import org.apache.commons.logging.*; |
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26 | |
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27 | import org.apache.hadoop.fs.*; |
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28 | import org.apache.hadoop.io.*; |
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29 | import org.apache.hadoop.conf.*; |
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30 | |
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31 | public class TestSequenceFileInputFilter extends TestCase { |
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32 | private static final Log LOG = FileInputFormat.LOG; |
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33 | |
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34 | private static final int MAX_LENGTH = 15000; |
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35 | private static final Configuration conf = new Configuration(); |
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36 | private static final JobConf job = new JobConf(conf); |
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37 | private static final FileSystem fs; |
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38 | private static final Path inDir = new Path(System.getProperty("test.build.data",".") + "/mapred"); |
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39 | private static final Path inFile = new Path(inDir, "test.seq"); |
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40 | private static final Random random = new Random(1); |
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41 | private static final Reporter reporter = Reporter.NULL; |
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42 | |
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43 | static { |
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44 | FileInputFormat.setInputPaths(job, inDir); |
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45 | try { |
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46 | fs = FileSystem.getLocal(conf); |
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47 | } catch (IOException e) { |
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48 | e.printStackTrace(); |
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49 | throw new RuntimeException(e); |
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50 | } |
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51 | } |
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52 | |
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53 | private static void createSequenceFile(int numRecords) throws Exception { |
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54 | // create a file with length entries |
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55 | SequenceFile.Writer writer = |
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56 | SequenceFile.createWriter(fs, conf, inFile, |
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57 | Text.class, BytesWritable.class); |
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58 | try { |
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59 | for (int i = 1; i <= numRecords; i++) { |
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60 | Text key = new Text(Integer.toString(i)); |
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61 | byte[] data = new byte[random.nextInt(10)]; |
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62 | random.nextBytes(data); |
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63 | BytesWritable value = new BytesWritable(data); |
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64 | writer.append(key, value); |
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65 | } |
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66 | } finally { |
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67 | writer.close(); |
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68 | } |
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69 | } |
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70 | |
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71 | |
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72 | private int countRecords(int numSplits) throws IOException { |
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73 | InputFormat<Text, BytesWritable> format = |
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74 | new SequenceFileInputFilter<Text, BytesWritable>(); |
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75 | Text key = new Text(); |
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76 | BytesWritable value = new BytesWritable(); |
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77 | if (numSplits==0) { |
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78 | numSplits = |
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79 | random.nextInt(MAX_LENGTH/(SequenceFile.SYNC_INTERVAL/20))+1; |
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80 | } |
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81 | InputSplit[] splits = format.getSplits(job, numSplits); |
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82 | |
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83 | // check each split |
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84 | int count = 0; |
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85 | LOG.info("Generated " + splits.length + " splits."); |
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86 | for (int j = 0; j < splits.length; j++) { |
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87 | RecordReader<Text, BytesWritable> reader = |
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88 | format.getRecordReader(splits[j], job, reporter); |
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89 | try { |
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90 | while (reader.next(key, value)) { |
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91 | LOG.info("Accept record "+key.toString()); |
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92 | count++; |
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93 | } |
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94 | } finally { |
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95 | reader.close(); |
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96 | } |
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97 | } |
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98 | return count; |
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99 | } |
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100 | |
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101 | public void testRegexFilter() throws Exception { |
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102 | // set the filter class |
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103 | LOG.info("Testing Regex Filter with patter: \\A10*"); |
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104 | SequenceFileInputFilter.setFilterClass(job, |
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105 | SequenceFileInputFilter.RegexFilter.class); |
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106 | SequenceFileInputFilter.RegexFilter.setPattern(job, "\\A10*"); |
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107 | |
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108 | // clean input dir |
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109 | fs.delete(inDir, true); |
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110 | |
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111 | // for a variety of lengths |
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112 | for (int length = 1; length < MAX_LENGTH; |
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113 | length+= random.nextInt(MAX_LENGTH/10)+1) { |
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114 | LOG.info("******Number of records: "+length); |
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115 | createSequenceFile(length); |
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116 | int count = countRecords(0); |
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117 | assertEquals(count, length==0?0:(int)Math.log10(length)+1); |
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118 | } |
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119 | |
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120 | // clean up |
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121 | fs.delete(inDir, true); |
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122 | } |
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123 | |
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124 | public void testPercentFilter() throws Exception { |
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125 | LOG.info("Testing Percent Filter with frequency: 1000"); |
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126 | // set the filter class |
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127 | SequenceFileInputFilter.setFilterClass(job, |
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128 | SequenceFileInputFilter.PercentFilter.class); |
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129 | SequenceFileInputFilter.PercentFilter.setFrequency(job, 1000); |
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130 | |
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131 | // clean input dir |
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132 | fs.delete(inDir, true); |
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133 | |
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134 | // for a variety of lengths |
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135 | for (int length = 0; length < MAX_LENGTH; |
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136 | length+= random.nextInt(MAX_LENGTH/10)+1) { |
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137 | LOG.info("******Number of records: "+length); |
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138 | createSequenceFile(length); |
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139 | int count = countRecords(1); |
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140 | LOG.info("Accepted "+count+" records"); |
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141 | int expectedCount = length/1000; |
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142 | if (expectedCount*1000!=length) |
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143 | expectedCount++; |
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144 | assertEquals(count, expectedCount); |
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145 | } |
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146 | |
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147 | // clean up |
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148 | fs.delete(inDir, true); |
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149 | } |
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150 | |
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151 | public void testMD5Filter() throws Exception { |
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152 | // set the filter class |
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153 | LOG.info("Testing MD5 Filter with frequency: 1000"); |
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154 | SequenceFileInputFilter.setFilterClass(job, |
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155 | SequenceFileInputFilter.MD5Filter.class); |
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156 | SequenceFileInputFilter.MD5Filter.setFrequency(job, 1000); |
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157 | |
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158 | // clean input dir |
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159 | fs.delete(inDir, true); |
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160 | |
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161 | // for a variety of lengths |
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162 | for (int length = 0; length < MAX_LENGTH; |
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163 | length+= random.nextInt(MAX_LENGTH/10)+1) { |
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164 | LOG.info("******Number of records: "+length); |
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165 | createSequenceFile(length); |
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166 | LOG.info("Accepted "+countRecords(0)+" records"); |
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167 | } |
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168 | // clean up |
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169 | fs.delete(inDir, true); |
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170 | } |
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171 | |
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172 | public static void main(String[] args) throws Exception { |
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173 | TestSequenceFileInputFilter filter = new TestSequenceFileInputFilter(); |
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174 | filter.testRegexFilter(); |
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175 | } |
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176 | } |
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