[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 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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