/**
* 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.IOException;
import org.apache.hadoop.mapred.Counters;
public class TestStreamingCombiner extends TestStreaming {
protected String combine = StreamUtil.makeJavaCommand(UniqApp.class, new String[]{""});
public TestStreamingCombiner() throws IOException {
super();
}
protected String[] genArgs() {
return new String[] {
"-input", INPUT_FILE.getAbsolutePath(),
"-output", OUTPUT_DIR.getAbsolutePath(),
"-mapper", map,
"-reducer", reduce,
"-combiner", combine,
"-jobconf", "stream.tmpdir="+System.getProperty("test.build.data","/tmp")
};
}
public void testCommandLine() throws Exception {
super.testCommandLine();
// validate combiner counters
String counterGrp = "org.apache.hadoop.mapred.Task$Counter";
Counters counters = job.running_.getCounters();
assertTrue(counters.findCounter(
counterGrp, "COMBINE_INPUT_RECORDS").getValue() != 0);
assertTrue(counters.findCounter(
counterGrp, "COMBINE_OUTPUT_RECORDS").getValue() != 0);
}
public static void main(String[]args) throws Exception
{
new TestStreamingCombiner().testCommandLine();
}
}