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.mapreduce.lib.map; |
---|
20 | |
---|
21 | import org.apache.hadoop.conf.Configuration; |
---|
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 | import org.apache.hadoop.mapred.HadoopTestCase; |
---|
27 | import org.apache.hadoop.mapreduce.*; |
---|
28 | import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
---|
29 | import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
---|
30 | |
---|
31 | import java.io.DataOutputStream; |
---|
32 | import java.io.IOException; |
---|
33 | |
---|
34 | public class TestMultithreadedMapper extends HadoopTestCase { |
---|
35 | |
---|
36 | public TestMultithreadedMapper() throws IOException { |
---|
37 | super(HadoopTestCase.LOCAL_MR, HadoopTestCase.LOCAL_FS, 1, 1); |
---|
38 | } |
---|
39 | |
---|
40 | public void testOKRun() throws Exception { |
---|
41 | run(false, false); |
---|
42 | } |
---|
43 | |
---|
44 | public void testIOExRun() throws Exception { |
---|
45 | run(true, false); |
---|
46 | } |
---|
47 | public void testRuntimeExRun() throws Exception { |
---|
48 | run(false, true); |
---|
49 | } |
---|
50 | |
---|
51 | private void run(boolean ioEx, boolean rtEx) throws Exception { |
---|
52 | String localPathRoot = System.getProperty("test.build.data", "/tmp"); |
---|
53 | Path inDir = new Path(localPathRoot, "testing/mt/input"); |
---|
54 | Path outDir = new Path(localPathRoot, "testing/mt/output"); |
---|
55 | |
---|
56 | |
---|
57 | Configuration conf = createJobConf(); |
---|
58 | if (ioEx) { |
---|
59 | conf.setBoolean("multithreaded.ioException", true); |
---|
60 | } |
---|
61 | if (rtEx) { |
---|
62 | conf.setBoolean("multithreaded.runtimeException", true); |
---|
63 | } |
---|
64 | |
---|
65 | Job job = new Job(conf); |
---|
66 | FileSystem fs = FileSystem.get(conf); |
---|
67 | if (fs.exists(outDir)) { |
---|
68 | fs.delete(outDir, true); |
---|
69 | } |
---|
70 | if (fs.exists(inDir)) { |
---|
71 | fs.delete(inDir, true); |
---|
72 | } |
---|
73 | fs.mkdirs(inDir); |
---|
74 | String input = "The quick brown fox\n" + "has many silly\n" |
---|
75 | + "red fox sox\n"; |
---|
76 | DataOutputStream file = fs.create(new Path(inDir, "part-" + 0)); |
---|
77 | file.writeBytes(input); |
---|
78 | file.close(); |
---|
79 | |
---|
80 | FileInputFormat.setInputPaths(job, inDir); |
---|
81 | FileOutputFormat.setOutputPath(job, outDir); |
---|
82 | job.setNumReduceTasks(1); |
---|
83 | job.setJobName("mt"); |
---|
84 | |
---|
85 | job.setMapperClass(MultithreadedMapper.class); |
---|
86 | MultithreadedMapper.setMapperClass(job, IDMap.class); |
---|
87 | MultithreadedMapper.setNumberOfThreads(job, 2); |
---|
88 | job.setReducerClass(Reducer.class); |
---|
89 | |
---|
90 | job.waitForCompletion(true); |
---|
91 | |
---|
92 | if (job.isSuccessful()) { |
---|
93 | assertFalse(ioEx || rtEx); |
---|
94 | } |
---|
95 | else { |
---|
96 | assertTrue(ioEx || rtEx); |
---|
97 | } |
---|
98 | } |
---|
99 | |
---|
100 | public static class IDMap extends |
---|
101 | Mapper<LongWritable, Text, LongWritable, Text> { |
---|
102 | private boolean ioEx = false; |
---|
103 | private boolean rtEx = false; |
---|
104 | |
---|
105 | public void setup(Context context) { |
---|
106 | ioEx = context.getConfiguration(). |
---|
107 | getBoolean("multithreaded.ioException", false); |
---|
108 | rtEx = context.getConfiguration(). |
---|
109 | getBoolean("multithreaded.runtimeException", false); |
---|
110 | } |
---|
111 | |
---|
112 | public void map(LongWritable key, Text value, Context context) |
---|
113 | throws IOException, InterruptedException { |
---|
114 | if (ioEx) { |
---|
115 | throw new IOException(); |
---|
116 | } |
---|
117 | if (rtEx) { |
---|
118 | throw new RuntimeException(); |
---|
119 | } |
---|
120 | super.map(key, value, context); |
---|
121 | } |
---|
122 | } |
---|
123 | } |
---|