TestClusterMapReduceTestCase.java
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上传日期:2018-01-08
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文件大小:4k
源码类别:
网格计算
开发平台:
Java
- /**
- * 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("hello1n");
- wr.write("hello2n");
- wr.write("hello3n");
- wr.write("hello4n");
- 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 OutputLogFilter()));
- 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"));
- }
- }