[120] | 1 | /** |
---|
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
---|
| 3 | * or more contributor license agreements. See the NOTICE file |
---|
| 4 | * distributed with this work for additional information |
---|
| 5 | * regarding copyright ownership. The ASF licenses this file |
---|
| 6 | * to you under the Apache License, Version 2.0 (the |
---|
| 7 | * "License"); you may not use this file except in compliance |
---|
| 8 | * with the License. You may obtain a copy of the License at |
---|
| 9 | * |
---|
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
---|
| 11 | * |
---|
| 12 | * Unless required by applicable law or agreed to in writing, software |
---|
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
---|
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
---|
| 15 | * See the License for the specific language governing permissions and |
---|
| 16 | * limitations under the License. |
---|
| 17 | */ |
---|
| 18 | |
---|
| 19 | package org.apache.hadoop.mapred; |
---|
| 20 | |
---|
| 21 | import org.apache.hadoop.fs.FileStatus; |
---|
| 22 | import org.apache.hadoop.fs.FileSystem; |
---|
| 23 | import org.apache.hadoop.fs.Path; |
---|
| 24 | import org.apache.hadoop.io.LongWritable; |
---|
| 25 | import org.apache.hadoop.io.Text; |
---|
| 26 | |
---|
| 27 | import java.io.DataOutputStream; |
---|
| 28 | import java.io.IOException; |
---|
| 29 | import java.io.OutputStream; |
---|
| 30 | import java.util.Iterator; |
---|
| 31 | |
---|
| 32 | public class TestFileOutputFormat extends HadoopTestCase { |
---|
| 33 | |
---|
| 34 | public TestFileOutputFormat() throws IOException { |
---|
| 35 | super(HadoopTestCase.CLUSTER_MR, HadoopTestCase.LOCAL_FS, 1, 1); |
---|
| 36 | } |
---|
| 37 | |
---|
| 38 | public void testCustomFile() throws Exception { |
---|
| 39 | Path inDir = new Path("testing/fileoutputformat/input"); |
---|
| 40 | Path outDir = new Path("testing/fileoutputformat/output"); |
---|
| 41 | |
---|
| 42 | // Hack for local FS that does not have the concept of a 'mounting point' |
---|
| 43 | if (isLocalFS()) { |
---|
| 44 | String localPathRoot = System.getProperty("test.build.data", "/tmp") |
---|
| 45 | .replace(' ', '+'); |
---|
| 46 | inDir = new Path(localPathRoot, inDir); |
---|
| 47 | outDir = new Path(localPathRoot, outDir); |
---|
| 48 | } |
---|
| 49 | |
---|
| 50 | |
---|
| 51 | JobConf conf = createJobConf(); |
---|
| 52 | FileSystem fs = FileSystem.get(conf); |
---|
| 53 | |
---|
| 54 | fs.delete(outDir, true); |
---|
| 55 | if (!fs.mkdirs(inDir)) { |
---|
| 56 | throw new IOException("Mkdirs failed to create " + inDir.toString()); |
---|
| 57 | } |
---|
| 58 | |
---|
| 59 | DataOutputStream file = fs.create(new Path(inDir, "part-0")); |
---|
| 60 | file.writeBytes("a\nb\n\nc\nd\ne"); |
---|
| 61 | file.close(); |
---|
| 62 | |
---|
| 63 | file = fs.create(new Path(inDir, "part-1")); |
---|
| 64 | file.writeBytes("a\nb\n\nc\nd\ne"); |
---|
| 65 | file.close(); |
---|
| 66 | |
---|
| 67 | conf.setJobName("fof"); |
---|
| 68 | conf.setInputFormat(TextInputFormat.class); |
---|
| 69 | |
---|
| 70 | conf.setOutputKeyClass(LongWritable.class); |
---|
| 71 | conf.setOutputValueClass(Text.class); |
---|
| 72 | |
---|
| 73 | conf.setMapOutputKeyClass(LongWritable.class); |
---|
| 74 | conf.setMapOutputValueClass(Text.class); |
---|
| 75 | |
---|
| 76 | conf.setOutputFormat(TextOutputFormat.class); |
---|
| 77 | conf.setOutputKeyClass(LongWritable.class); |
---|
| 78 | conf.setOutputValueClass(Text.class); |
---|
| 79 | |
---|
| 80 | conf.setMapperClass(TestMap.class); |
---|
| 81 | conf.setReducerClass(TestReduce.class); |
---|
| 82 | |
---|
| 83 | FileInputFormat.setInputPaths(conf, inDir); |
---|
| 84 | FileOutputFormat.setOutputPath(conf, outDir); |
---|
| 85 | |
---|
| 86 | JobClient jc = new JobClient(conf); |
---|
| 87 | RunningJob job = jc.submitJob(conf); |
---|
| 88 | while (!job.isComplete()) { |
---|
| 89 | Thread.sleep(100); |
---|
| 90 | } |
---|
| 91 | assertTrue(job.isSuccessful()); |
---|
| 92 | |
---|
| 93 | boolean map0 = false; |
---|
| 94 | boolean map1 = false; |
---|
| 95 | boolean reduce = false; |
---|
| 96 | FileStatus[] statuses = fs.listStatus(outDir); |
---|
| 97 | for (FileStatus status : statuses) { |
---|
| 98 | map0 = map0 || status.getPath().getName().equals("test-m-00000"); |
---|
| 99 | map1 = map1 || status.getPath().getName().equals("test-m-00001"); |
---|
| 100 | reduce = reduce || status.getPath().getName().equals("test-r-00000"); |
---|
| 101 | } |
---|
| 102 | |
---|
| 103 | assertTrue(map0); |
---|
| 104 | assertTrue(map1); |
---|
| 105 | assertTrue(reduce); |
---|
| 106 | } |
---|
| 107 | |
---|
| 108 | public static class TestMap implements Mapper<LongWritable, Text, |
---|
| 109 | LongWritable, Text> { |
---|
| 110 | |
---|
| 111 | public void configure(JobConf conf) { |
---|
| 112 | try { |
---|
| 113 | FileSystem fs = FileSystem.get(conf); |
---|
| 114 | OutputStream os = |
---|
| 115 | fs.create(FileOutputFormat.getPathForCustomFile(conf, "test")); |
---|
| 116 | os.write(1); |
---|
| 117 | os.close(); |
---|
| 118 | } |
---|
| 119 | catch (IOException ex) { |
---|
| 120 | throw new RuntimeException(ex); |
---|
| 121 | } |
---|
| 122 | } |
---|
| 123 | |
---|
| 124 | public void map(LongWritable key, Text value, |
---|
| 125 | OutputCollector<LongWritable, Text> output, |
---|
| 126 | Reporter reporter) throws IOException { |
---|
| 127 | output.collect(key, value); |
---|
| 128 | } |
---|
| 129 | |
---|
| 130 | public void close() throws IOException { |
---|
| 131 | } |
---|
| 132 | } |
---|
| 133 | |
---|
| 134 | public static class TestReduce implements Reducer<LongWritable, Text, |
---|
| 135 | LongWritable, Text> { |
---|
| 136 | |
---|
| 137 | public void configure(JobConf conf) { |
---|
| 138 | try { |
---|
| 139 | FileSystem fs = FileSystem.get(conf); |
---|
| 140 | OutputStream os = |
---|
| 141 | fs.create(FileOutputFormat.getPathForCustomFile(conf, "test")); |
---|
| 142 | os.write(1); |
---|
| 143 | os.close(); |
---|
| 144 | } |
---|
| 145 | catch (IOException ex) { |
---|
| 146 | throw new RuntimeException(ex); |
---|
| 147 | } |
---|
| 148 | } |
---|
| 149 | |
---|
| 150 | public void reduce(LongWritable key, Iterator<Text> values, |
---|
| 151 | OutputCollector<LongWritable, Text> output, |
---|
| 152 | Reporter reporter) throws IOException { |
---|
| 153 | while (values.hasNext()) { |
---|
| 154 | Text value = values.next(); |
---|
| 155 | output.collect(key, value); |
---|
| 156 | } |
---|
| 157 | } |
---|
| 158 | |
---|
| 159 | public void close() throws IOException { |
---|
| 160 | } |
---|
| 161 | } |
---|
| 162 | |
---|
| 163 | } |
---|