/**
* 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.streaming;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StringWriter;
import junit.framework.TestCase;
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.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.hadoop.mapred.Utils;
/**
* This test case tests the symlink creation
* utility provided by distributed caching
*/
public class TestSymLink extends TestCase
{
String INPUT_FILE = "/testing-streaming/input.txt";
String OUTPUT_DIR = "/testing-streaming/out";
String CACHE_FILE = "/testing-streaming/cache.txt";
String input = "check to see if we can read this none reduce";
String map = "xargs cat ";
String reduce = "cat";
String mapString = "testlink\n";
String cacheString = "This is just the cache string";
StreamJob job;
public TestSymLink() throws IOException
{
}
public void testSymLink() throws Exception
{
boolean mayExit = false;
MiniMRCluster mr = null;
MiniDFSCluster dfs = null;
try{
Configuration conf = new Configuration();
dfs = new MiniDFSCluster(conf, 1, true, null);
FileSystem fileSys = dfs.getFileSystem();
String namenode = fileSys.getName();
mr = new MiniMRCluster(1, namenode, 3);
// During tests, the default Configuration will use a local mapred
// So don't specify -config or -cluster
String strJobtracker = "mapred.job.tracker=" + "localhost:" + mr.getJobTrackerPort();
String strNamenode = "fs.default.name=" + namenode;
String argv[] = new String[] {
"-input", INPUT_FILE,
"-output", OUTPUT_DIR,
"-mapper", map,
"-reducer", reduce,
//"-verbose",
//"-jobconf", "stream.debug=set"
"-jobconf", strNamenode,
"-jobconf", strJobtracker,
"-jobconf", "stream.tmpdir="+System.getProperty("test.build.data","/tmp"),
"-jobconf",
JobConf.MAPRED_MAP_TASK_JAVA_OPTS + "=" +
"-Dcontrib.name=" + System.getProperty("contrib.name") + " " +
"-Dbuild.test=" + System.getProperty("build.test") + " " +
conf.get(JobConf.MAPRED_MAP_TASK_JAVA_OPTS,
conf.get(JobConf.MAPRED_TASK_JAVA_OPTS, "")),
"-jobconf",
JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS + "=" +
"-Dcontrib.name=" + System.getProperty("contrib.name") + " " +
"-Dbuild.test=" + System.getProperty("build.test") + " " +
conf.get(JobConf.MAPRED_REDUCE_TASK_JAVA_OPTS,
conf.get(JobConf.MAPRED_TASK_JAVA_OPTS, "")),
"-cacheFile", "hdfs://"+fileSys.getName()+CACHE_FILE + "#testlink"
};
fileSys.delete(new Path(OUTPUT_DIR), true);
DataOutputStream file = fileSys.create(new Path(INPUT_FILE));
file.writeBytes(mapString);
file.close();
file = fileSys.create(new Path(CACHE_FILE));
file.writeBytes(cacheString);
file.close();
job = new StreamJob(argv, mayExit);
job.go();
fileSys = dfs.getFileSystem();
String line = null;
Path[] fileList = FileUtil.stat2Paths(fileSys.listStatus(
new Path(OUTPUT_DIR),
new Utils.OutputFileUtils
.OutputFilesFilter()));
for (int i = 0; i < fileList.length; i++){
System.out.println(fileList[i].toString());
BufferedReader bread =
new BufferedReader(new InputStreamReader(fileSys.open(fileList[i])));
line = bread.readLine();
System.out.println(line);
}
assertEquals(cacheString + "\t", line);
} finally{
if (dfs != null) { dfs.shutdown(); }
if (mr != null) { mr.shutdown();}
}
}
public static void main(String[]args) throws Exception
{
new TestStreaming().testCommandLine();
}
}