/**
* 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.*;
/**
* This class tests hadoopStreaming with customized separator in MapReduce local mode.
*/
public class TestStreamingSeparator extends TestStreaming
{
// "map" command: grep -E (red|green|blue)
// reduce command: uniq
protected File INPUT_FILE = new File("TestStreamingSeparator.input.txt");
protected File OUTPUT_DIR = new File("TestStreamingSeparator.out");
protected String input = "roses1are.red\nviolets1are.blue\nbunnies1are.pink\n";
// key.value.separator.in.input.line reads 1 as separator
// stream.map.input.field.separator uses 2 as separator
// map behaves like "/usr/bin/tr 2 3"; (translate 2 to 3)
protected String map = StreamUtil.makeJavaCommand(TrApp.class, new String[]{"2", "3"});
// stream.map.output.field.separator recognize 3 as separator
// stream.reduce.input.field.separator recognize 3 as separator
// reduce behaves like "/usr/bin/tr 3 4"; (translate 3 to 4)
protected String reduce = StreamUtil.makeJavaCommand(TrAppReduce.class, new String[]{"3", "4"});
// stream.reduce.output.field.separator recognize 4 as separator
// mapred.textoutputformat.separator outputs 5 as separator
protected String outputExpect = "bunnies5are.pink\nroses5are.red\nviolets5are.blue\n";
public TestStreamingSeparator() throws IOException {
super();
setInputFile(INPUT_FILE);
setOutputDir(OUTPUT_DIR);
setInputString(input);
setExpectedOutput(outputExpect);
}
protected String[] genArgs() {
return new String[] {
"-input", INPUT_FILE.getAbsolutePath(),
"-output", OUTPUT_DIR.getAbsolutePath(),
"-mapper", map,
"-reducer", reduce,
//"-verbose",
//"-jobconf", "stream.debug=set"
"-jobconf", "keep.failed.task.files=true",
"-jobconf", "stream.tmpdir="+System.getProperty("test.build.data","/tmp"),
"-inputformat", "KeyValueTextInputFormat",
"-jobconf", "key.value.separator.in.input.line=1",
"-jobconf", "stream.map.input.field.separator=2",
"-jobconf", "stream.map.output.field.separator=3",
"-jobconf", "stream.reduce.input.field.separator=3",
"-jobconf", "stream.reduce.output.field.separator=4",
"-jobconf", "mapred.textoutputformat.separator=5",
};
}
public static void main(String[]args) throws Exception
{
new TestStreamingSeparator().testCommandLine();
}
}