/**
* 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 static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapred.Counters.Counter;
import org.apache.hadoop.mapred.IFile.Writer;
import org.apache.hadoop.mapred.Task.CombineOutputCollector;
import org.apache.hadoop.mapred.Task.TaskReporter;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.junit.Test;
public class TestCombineOutputCollector {
private CombineOutputCollector<String, Integer> coc;
Counters.Counter outCounter = new Counters.Counter() {
private long value;
@Override
public void setValue(long value) {
this.value = value;
}
@Override
public void setDisplayName(String displayName) {
// TODO Auto-generated method stub
}
@Override
public void increment(long incr) {
this.value += incr;
}
@Override
public long getValue() {
return value;
}
@Override
public String getName() {
// TODO Auto-generated method stub
return null;
}
@Override
public String getDisplayName() {
// TODO Auto-generated method stub
return null;
}
@Override
public String makeEscapedCompactString() {
// TODO Auto-generated method stub
return null;
}
@Override
public long getCounter() {
return value;
}
@Override
public boolean contentEquals(Counter counter) {
// TODO Auto-generated method stub
return false;
}
@Override
public void write(DataOutput out) throws IOException {
}
@Override
public void readFields(DataInput in) throws IOException {
}
};
@Test
public void testCustomCollect() throws Throwable {
//mock creation
TaskReporter mockTaskReporter = mock(TaskReporter.class);
@SuppressWarnings("unchecked")
Writer<String, Integer> mockWriter = mock(Writer.class);
Configuration conf = new Configuration();
conf.set(MRJobConfig.COMBINE_RECORDS_BEFORE_PROGRESS, "2");
coc = new CombineOutputCollector<String, Integer>(outCounter, mockTaskReporter, conf);
coc.setWriter(mockWriter);
verify(mockTaskReporter, never()).progress();
coc.collect("dummy", 1);
verify(mockTaskReporter, never()).progress();
coc.collect("dummy", 2);
verify(mockTaskReporter, times(1)).progress();
}
@Test
public void testDefaultCollect() throws Throwable {
//mock creation
TaskReporter mockTaskReporter = mock(TaskReporter.class);
@SuppressWarnings("unchecked")
Writer<String, Integer> mockWriter = mock(Writer.class);
Configuration conf = new Configuration();
coc = new CombineOutputCollector<String, Integer>(outCounter, mockTaskReporter, conf);
coc.setWriter(mockWriter);
verify(mockTaskReporter, never()).progress();
for(int i = 0; i < Task.DEFAULT_COMBINE_RECORDS_BEFORE_PROGRESS; i++) {
coc.collect("dummy", i);
}
verify(mockTaskReporter, times(1)).progress();
for(int i = 0; i < Task.DEFAULT_COMBINE_RECORDS_BEFORE_PROGRESS; i++) {
coc.collect("dummy", i);
}
verify(mockTaskReporter, times(2)).progress();
}
}