/**
* 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 junit.framework.TestCase;
import java.io.*;
import java.util.*;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.*;
import org.apache.hadoop.dfs.MiniDFSCluster;
/**
* This test case tests the symlink creation
* utility provided by distributed caching
*/
public class TestMultipleCachefiles extends TestCase
{
String INPUT_FILE = "/testing-streaming/input.txt";
String OUTPUT_DIR = "/testing-streaming/out";
String CACHE_FILE = "/testing-streaming/cache.txt";
String CACHE_FILE_2 = "/testing-streaming/cache2.txt";
String input = "check to see if we can read this none reduce";
String map = "xargs cat ";
String reduce = "cat";
String mapString = "testlink";
String mapString2 = "testlink2";
String cacheString = "This is just the cache string";
String cacheString2 = "This is just the second cache string";
StreamJob job;
public TestMultipleCachefiles() throws IOException
{
}
public void testMultipleCachefiles()
{
try {
boolean mayExit = false;
MiniMRCluster mr = null;
MiniDFSCluster dfs = null;
FileSystem fileSys = null;
try{
Configuration conf = new Configuration();
dfs = new MiniDFSCluster(conf, 1, true, null);
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", "mapred.child.java.opts=-Dcontrib.name=" + System.getProperty("contrib.name") + " " +
"-Dbuild.test=" + System.getProperty("build.test") + " " +
conf.get("mapred.child.java.opts",""),
"-cacheFile", "hdfs://"+fileSys.getName()+CACHE_FILE + "#" + mapString,
"-cacheFile", "hdfs://"+fileSys.getName()+CACHE_FILE_2 + "#" + mapString2
};
fileSys.delete(new Path(OUTPUT_DIR));
DataOutputStream file = fileSys.create(new Path(INPUT_FILE));
file.writeBytes(mapString + "\n");
file.writeBytes(mapString2 + "\n");
file.close();
file = fileSys.create(new Path(CACHE_FILE));
file.writeBytes(cacheString);
file.close();
file = fileSys.create(new Path(CACHE_FILE_2));
file.writeBytes(cacheString2);
file.close();
job = new StreamJob(argv, mayExit);
job.go();
String line = null;
String line2 = null;
Path[] fileList = fileSys.listPaths(new Path(OUTPUT_DIR));
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);
line2 = bread.readLine();
System.out.println(line2);
}
assertEquals(cacheString + "\t", line);
assertEquals(cacheString2 + "\t", line2);
} finally{
if (fileSys != null) { fileSys.close(); }
if (dfs != null) { dfs.shutdown(); }
if (mr != null) { mr.shutdown();}
}
} catch(Exception e) {
failTrace(e);
}
}
void failTrace(Exception e)
{
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
fail(sw.toString());
}
public static void main(String[]args) throws Exception
{
new TestMultipleCachefiles().testMultipleCachefiles();
}
}