TestSpecialCharactersInOutputPath.java
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上传日期:2018-01-08
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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 java.io.DataOutputStream;
- import java.io.IOException;
- import junit.framework.TestCase;
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.hdfs.MiniDFSCluster;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.io.LongWritable;
- import org.apache.hadoop.io.Text;
- import org.apache.hadoop.mapred.lib.IdentityMapper;
- import org.apache.hadoop.mapred.lib.IdentityReducer;
- import org.apache.hadoop.util.Progressable;
- /**
- * A JUnit test to test that jobs' output filenames are not HTML-encoded (cf HADOOP-1795).
- */
- public class TestSpecialCharactersInOutputPath extends TestCase {
- private static final Log LOG =
- LogFactory.getLog(TestSpecialCharactersInOutputPath.class.getName());
- private static final String OUTPUT_FILENAME = "result[0]";
- public static boolean launchJob(String fileSys,
- String jobTracker,
- JobConf conf,
- int numMaps,
- int numReduces) throws IOException {
- final Path inDir = new Path("/testing/input");
- final Path outDir = new Path("/testing/output");
- FileSystem fs = FileSystem.getNamed(fileSys, conf);
- fs.delete(outDir, true);
- if (!fs.mkdirs(inDir)) {
- LOG.warn("Can't create " + inDir);
- return false;
- }
- // generate an input file
- DataOutputStream file = fs.create(new Path(inDir, "part-0"));
- file.writeBytes("foo foo2 foo3");
- file.close();
- // use WordCount example
- FileSystem.setDefaultUri(conf, fileSys);
- conf.set("mapred.job.tracker", jobTracker);
- conf.setJobName("foo");
- conf.setInputFormat(TextInputFormat.class);
- conf.setOutputFormat(SpecialTextOutputFormat.class);
- conf.setOutputKeyClass(LongWritable.class);
- conf.setOutputValueClass(Text.class);
- conf.setMapperClass(IdentityMapper.class);
- conf.setReducerClass(IdentityReducer.class);
- FileInputFormat.setInputPaths(conf, inDir);
- FileOutputFormat.setOutputPath(conf, outDir);
- conf.setNumMapTasks(numMaps);
- conf.setNumReduceTasks(numReduces);
- // run job and wait for completion
- RunningJob runningJob = JobClient.runJob(conf);
- try {
- assertTrue(runningJob.isComplete());
- assertTrue(runningJob.isSuccessful());
- assertTrue("Output folder not found!", fs.exists(new Path("/testing/output/" + OUTPUT_FILENAME)));
- } catch (NullPointerException npe) {
- // This NPE should no more happens
- fail("A NPE should not have happened.");
- }
- // return job result
- LOG.info("job is complete: " + runningJob.isSuccessful());
- return (runningJob.isSuccessful());
- }
- public void testJobWithDFS() throws IOException {
- String namenode = null;
- MiniDFSCluster dfs = null;
- MiniMRCluster mr = null;
- FileSystem fileSys = null;
- try {
- final int taskTrackers = 4;
- final int jobTrackerPort = 60050;
- Configuration conf = new Configuration();
- dfs = new MiniDFSCluster(conf, 1, true, null);
- fileSys = dfs.getFileSystem();
- namenode = fileSys.getName();
- mr = new MiniMRCluster(taskTrackers, namenode, 2);
- final String jobTrackerName = "localhost:" + mr.getJobTrackerPort();
- JobConf jobConf = new JobConf();
- boolean result;
- result = launchJob(namenode, jobTrackerName, jobConf,
- 3, 1);
- assertTrue(result);
- } finally {
- if (dfs != null) { dfs.shutdown(); }
- if (mr != null) { mr.shutdown(); }
- }
- }
- /** generates output filenames with special characters */
- static class SpecialTextOutputFormat<K,V> extends TextOutputFormat<K,V> {
- @Override
- public RecordWriter<K,V> getRecordWriter(FileSystem ignored, JobConf job,
- String name, Progressable progress) throws IOException {
- return super.getRecordWriter(ignored, job, OUTPUT_FILENAME, progress);
- }
- }
- }