| /** |
| * 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 org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| |
| import java.io.*; |
| import java.util.Properties; |
| |
| public class TestClusterMapReduceTestCase extends ClusterMapReduceTestCase { |
| public void _testMapReduce(boolean restart) throws Exception { |
| OutputStream os = getFileSystem().create(new Path(getInputDir(), "text.txt")); |
| Writer wr = new OutputStreamWriter(os); |
| wr.write("hello1\n"); |
| wr.write("hello2\n"); |
| wr.write("hello3\n"); |
| wr.write("hello4\n"); |
| wr.close(); |
| |
| if (restart) { |
| stopCluster(); |
| startCluster(false, null); |
| } |
| |
| JobConf conf = createJobConf(); |
| conf.setJobName("mr"); |
| |
| conf.setInputFormat(TextInputFormat.class); |
| |
| conf.setMapOutputKeyClass(LongWritable.class); |
| conf.setMapOutputValueClass(Text.class); |
| |
| conf.setOutputFormat(TextOutputFormat.class); |
| conf.setOutputKeyClass(LongWritable.class); |
| conf.setOutputValueClass(Text.class); |
| |
| conf.setMapperClass(org.apache.hadoop.mapred.lib.IdentityMapper.class); |
| conf.setReducerClass(org.apache.hadoop.mapred.lib.IdentityReducer.class); |
| |
| FileInputFormat.setInputPaths(conf, getInputDir()); |
| |
| FileOutputFormat.setOutputPath(conf, getOutputDir()); |
| |
| |
| JobClient.runJob(conf); |
| |
| Path[] outputFiles = FileUtil.stat2Paths( |
| getFileSystem().listStatus(getOutputDir(), |
| new Utils.OutputFileUtils.OutputFilesFilter())); |
| if (outputFiles.length > 0) { |
| InputStream is = getFileSystem().open(outputFiles[0]); |
| BufferedReader reader = new BufferedReader(new InputStreamReader(is)); |
| String line = reader.readLine(); |
| int counter = 0; |
| while (line != null) { |
| counter++; |
| assertTrue(line.contains("hello")); |
| line = reader.readLine(); |
| } |
| reader.close(); |
| assertEquals(4, counter); |
| } |
| |
| } |
| |
| public void testMapReduce() throws Exception { |
| _testMapReduce(false); |
| } |
| |
| public void testMapReduceRestarting() throws Exception { |
| _testMapReduce(true); |
| } |
| |
| public void testDFSRestart() throws Exception { |
| Path file = new Path(getInputDir(), "text.txt"); |
| OutputStream os = getFileSystem().create(file); |
| Writer wr = new OutputStreamWriter(os); |
| wr.close(); |
| |
| stopCluster(); |
| startCluster(false, null); |
| assertTrue(getFileSystem().exists(file)); |
| |
| stopCluster(); |
| startCluster(true, null); |
| assertFalse(getFileSystem().exists(file)); |
| |
| } |
| |
| public void testMRConfig() throws Exception { |
| JobConf conf = createJobConf(); |
| assertNull(conf.get("xyz")); |
| |
| Properties config = new Properties(); |
| config.setProperty("xyz", "XYZ"); |
| stopCluster(); |
| startCluster(false, config); |
| |
| conf = createJobConf(); |
| assertEquals("XYZ", conf.get("xyz")); |
| } |
| |
| } |