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* 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.flink.runtime.operators;
import org.junit.Assert;
import org.apache.flink.api.common.functions.CoGroupFunction;
import org.apache.flink.api.common.functions.RichCoGroupFunction;
import org.apache.flink.api.common.typeutils.record.RecordComparator;
import org.apache.flink.api.common.typeutils.record.RecordPairComparatorFactory;
import org.apache.flink.runtime.operators.testutils.DriverTestBase;
import org.apache.flink.runtime.operators.testutils.UniformRecordGenerator;
import org.apache.flink.types.IntValue;
import org.apache.flink.types.Key;
import org.apache.flink.types.Record;
import org.apache.flink.util.Collector;
import org.junit.Test;
public class CoGroupTaskExternalITCase extends DriverTestBase<CoGroupFunction<Record, Record, Record>>
{
private static final long SORT_MEM = 3*1024*1024;
@SuppressWarnings("unchecked")
private final RecordComparator comparator1 = new RecordComparator(
new int[]{0}, (Class<? extends Key<?>>[])new Class[]{ IntValue.class });
@SuppressWarnings("unchecked")
private final RecordComparator comparator2 = new RecordComparator(
new int[]{0}, (Class<? extends Key<?>>[])new Class[]{ IntValue.class });
private final CountingOutputCollector output = new CountingOutputCollector();
public CoGroupTaskExternalITCase() {
super(0, 2, SORT_MEM);
}
@Test
public void testExternalSortCoGroupTask() {
int keyCnt1 = 16384*8;
int valCnt1 = 32;
int keyCnt2 = 65536*4;
int valCnt2 = 4;
final int expCnt = valCnt1*valCnt2*Math.min(keyCnt1, keyCnt2) +
(keyCnt1 > keyCnt2 ? (keyCnt1 - keyCnt2) * valCnt1 : (keyCnt2 - keyCnt1) * valCnt2);
setOutput(this.output);
addDriverComparator(this.comparator1);
addDriverComparator(this.comparator2);
getTaskConfig().setDriverPairComparator(RecordPairComparatorFactory.get());
getTaskConfig().setDriverStrategy(DriverStrategy.CO_GROUP);
final CoGroupDriver<Record, Record, Record> testTask = new CoGroupDriver<Record, Record, Record>();
try {
addInputSorted(new UniformRecordGenerator(keyCnt1, valCnt1, false), this.comparator1.duplicate());
addInputSorted(new UniformRecordGenerator(keyCnt2, valCnt2, false), this.comparator2.duplicate());
testDriver(testTask, MockCoGroupStub.class);
} catch (Exception e) {
e.printStackTrace();
Assert.fail("The test caused an exception.");
}
Assert.assertEquals("Wrong result set size.", expCnt, this.output.getNumberOfRecords());
}
public static final class MockCoGroupStub extends RichCoGroupFunction<Record, Record, Record> {
private static final long serialVersionUID = 1L;
private final Record res = new Record();
@SuppressWarnings("unused")
@Override
public void coGroup(Iterable<Record> records1, Iterable<Record> records2, Collector<Record> out) {
int val1Cnt = 0;
int val2Cnt = 0;
for (Record r : records1) {
val1Cnt++;
}
for (Record r : records2) {
val2Cnt++;
}
if (val1Cnt == 0) {
for (int i = 0; i < val2Cnt; i++) {
out.collect(this.res);
}
} else if (val2Cnt == 0) {
for (int i = 0; i < val1Cnt; i++) {
out.collect(this.res);
}
} else {
for (int i = 0; i < val2Cnt * val1Cnt; i++) {
out.collect(this.res);
}
}
}
}
}