| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.mapred; |
| |
| import static org.junit.Assert.*; |
| |
| import java.io.BufferedReader; |
| import java.io.DataOutputStream; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.util.Random; |
| import java.util.StringTokenizer; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.MRConfig; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.mapreduce.Reducer; |
| import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class TestLocalModeWithNewApis { |
| |
| public static final Log LOG = |
| LogFactory.getLog(TestLocalModeWithNewApis.class); |
| |
| Configuration conf; |
| |
| @Before |
| public void setUp() throws Exception { |
| conf = new Configuration(); |
| conf.set(MRConfig.FRAMEWORK_NAME, MRConfig.LOCAL_FRAMEWORK_NAME); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| } |
| |
| @Test |
| public void testNewApis() throws Exception { |
| Random r = new Random(System.currentTimeMillis()); |
| Path tmpBaseDir = new Path("/tmp/wc-" + r.nextInt()); |
| final Path inDir = new Path(tmpBaseDir, "input"); |
| final Path outDir = new Path(tmpBaseDir, "output"); |
| String input = "The quick brown fox\nhas many silly\nred fox sox\n"; |
| FileSystem inFs = inDir.getFileSystem(conf); |
| FileSystem outFs = outDir.getFileSystem(conf); |
| outFs.delete(outDir, true); |
| if (!inFs.mkdirs(inDir)) { |
| throw new IOException("Mkdirs failed to create " + inDir.toString()); |
| } |
| { |
| DataOutputStream file = inFs.create(new Path(inDir, "part-0")); |
| file.writeBytes(input); |
| file.close(); |
| } |
| |
| Job job = Job.getInstance(conf, "word count"); |
| job.setJarByClass(TestLocalModeWithNewApis.class); |
| job.setMapperClass(TokenizerMapper.class); |
| job.setCombinerClass(IntSumReducer.class); |
| job.setReducerClass(IntSumReducer.class); |
| job.setOutputKeyClass(Text.class); |
| job.setOutputValueClass(IntWritable.class); |
| FileInputFormat.addInputPath(job, inDir); |
| FileOutputFormat.setOutputPath(job, outDir); |
| assertEquals(job.waitForCompletion(true), true); |
| |
| String output = readOutput(outDir, conf); |
| assertEquals("The\t1\nbrown\t1\nfox\t2\nhas\t1\nmany\t1\n" + |
| "quick\t1\nred\t1\nsilly\t1\nsox\t1\n", output); |
| |
| outFs.delete(tmpBaseDir, true); |
| } |
| |
| static String readOutput(Path outDir, Configuration conf) |
| throws IOException { |
| FileSystem fs = outDir.getFileSystem(conf); |
| StringBuffer result = new StringBuffer(); |
| |
| Path[] fileList = FileUtil.stat2Paths(fs.listStatus(outDir, |
| new Utils.OutputFileUtils.OutputFilesFilter())); |
| for (Path outputFile : fileList) { |
| LOG.info("Path" + ": "+ outputFile); |
| BufferedReader file = |
| new BufferedReader(new InputStreamReader(fs.open(outputFile))); |
| String line = file.readLine(); |
| while (line != null) { |
| result.append(line); |
| result.append("\n"); |
| line = file.readLine(); |
| } |
| file.close(); |
| } |
| return result.toString(); |
| } |
| |
| public static class TokenizerMapper |
| extends Mapper<Object, Text, Text, IntWritable>{ |
| |
| private final static IntWritable one = new IntWritable(1); |
| private Text word = new Text(); |
| |
| public void map(Object key, Text value, Context context |
| ) throws IOException, InterruptedException { |
| StringTokenizer itr = new StringTokenizer(value.toString()); |
| while (itr.hasMoreTokens()) { |
| word.set(itr.nextToken()); |
| context.write(word, one); |
| } |
| } |
| } |
| |
| |
| public static class IntSumReducer |
| extends Reducer<Text,IntWritable,Text,IntWritable> { |
| private IntWritable result = new IntWritable(); |
| |
| public void reduce(Text key, Iterable<IntWritable> values, |
| Context context |
| ) throws IOException, InterruptedException { |
| int sum = 0; |
| for (IntWritable val : values) { |
| sum += val.get(); |
| } |
| result.set(sum); |
| context.write(key, result); |
| } |
| } |
| |
| } |