/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.pact.runtime.task;
import java.util.Iterator;
import java.util.concurrent.atomic.AtomicBoolean;
import junit.framework.Assert;
import org.junit.Test;
import eu.stratosphere.api.common.functions.GenericCoGrouper;
import eu.stratosphere.api.java.record.functions.CoGroupFunction;
import eu.stratosphere.api.java.typeutils.runtime.record.RecordComparator;
import eu.stratosphere.api.java.typeutils.runtime.record.RecordPairComparatorFactory;
import eu.stratosphere.pact.runtime.task.CoGroupTaskExternalITCase.MockCoGroupStub;
import eu.stratosphere.pact.runtime.test.util.DelayingInfinitiveInputIterator;
import eu.stratosphere.pact.runtime.test.util.DriverTestBase;
import eu.stratosphere.pact.runtime.test.util.ExpectedTestException;
import eu.stratosphere.pact.runtime.test.util.TaskCancelThread;
import eu.stratosphere.pact.runtime.test.util.UniformRecordGenerator;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.Key;
import eu.stratosphere.types.Record;
import eu.stratosphere.util.Collector;
public class CoGroupTaskTest extends DriverTestBase<GenericCoGrouper<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 CoGroupTaskTest() {
super(0, 2, SORT_MEM);
}
@Test
public void testSortBoth1CoGroupTask() {
int keyCnt1 = 100;
int valCnt1 = 2;
int keyCnt2 = 200;
int valCnt2 = 1;
final int expCnt = valCnt1*valCnt2*Math.min(keyCnt1, keyCnt2) +
(keyCnt1 > keyCnt2 ? (keyCnt1 - keyCnt2) * valCnt1 : (keyCnt2 - keyCnt1) * valCnt2);
setOutput(this.output);
addInputComparator(this.comparator1);
addInputComparator(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());
}
@Test
public void testSortBoth2CoGroupTask() {
int keyCnt1 = 200;
int valCnt1 = 2;
int keyCnt2 = 200;
int valCnt2 = 4;
final int expCnt = valCnt1*valCnt2*Math.min(keyCnt1, keyCnt2) +
(keyCnt1 > keyCnt2 ? (keyCnt1 - keyCnt2) * valCnt1 : (keyCnt2 - keyCnt1) * valCnt2);
setOutput(this.output);
addInputComparator(this.comparator1);
addInputComparator(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());
}
@Test
public void testSortFirstCoGroupTask() {
int keyCnt1 = 200;
int valCnt1 = 2;
int keyCnt2 = 200;
int valCnt2 = 4;
final int expCnt = valCnt1*valCnt2*Math.min(keyCnt1, keyCnt2) +
(keyCnt1 > keyCnt2 ? (keyCnt1 - keyCnt2) * valCnt1 : (keyCnt2 - keyCnt1) * valCnt2);
setOutput(this.output);
addInputComparator(this.comparator1);
addInputComparator(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());
addInput(new UniformRecordGenerator(keyCnt2, valCnt2, true));
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());
}
@Test
public void testSortSecondCoGroupTask() {
int keyCnt1 = 200;
int valCnt1 = 2;
int keyCnt2 = 200;
int valCnt2 = 4;
final int expCnt = valCnt1*valCnt2*Math.min(keyCnt1, keyCnt2) +
(keyCnt1 > keyCnt2 ? (keyCnt1 - keyCnt2) * valCnt1 : (keyCnt2 - keyCnt1) * valCnt2);
setOutput(this.output);
addInputComparator(this.comparator1);
addInputComparator(this.comparator2);
getTaskConfig().setDriverPairComparator(RecordPairComparatorFactory.get());
getTaskConfig().setDriverStrategy(DriverStrategy.CO_GROUP);
final CoGroupDriver<Record, Record, Record> testTask = new CoGroupDriver<Record, Record, Record>();
try {
addInput(new UniformRecordGenerator(keyCnt1, valCnt1, true));
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());
}
@Test
public void testMergeCoGroupTask() {
int keyCnt1 = 200;
int valCnt1 = 2;
int keyCnt2 = 200;
int valCnt2 = 4;
final int expCnt = valCnt1*valCnt2*Math.min(keyCnt1, keyCnt2) +
(keyCnt1 > keyCnt2 ? (keyCnt1 - keyCnt2) * valCnt1 : (keyCnt2 - keyCnt1) * valCnt2);
setOutput(this.output);
addInput(new UniformRecordGenerator(keyCnt1, valCnt1, true));
addInput(new UniformRecordGenerator(keyCnt2, valCnt2, true));
addInputComparator(this.comparator1);
addInputComparator(this.comparator2);
getTaskConfig().setDriverPairComparator(RecordPairComparatorFactory.get());
getTaskConfig().setDriverStrategy(DriverStrategy.CO_GROUP);
final CoGroupDriver<Record, Record, Record> testTask = new CoGroupDriver<Record, Record, Record>();
try {
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());
}
@Test
public void testFailingSortCoGroupTask() {
int keyCnt1 = 100;
int valCnt1 = 2;
int keyCnt2 = 200;
int valCnt2 = 1;
setOutput(this.output);
addInput(new UniformRecordGenerator(keyCnt1, valCnt1, true));
addInput(new UniformRecordGenerator(keyCnt2, valCnt2, true));
addInputComparator(this.comparator1);
addInputComparator(this.comparator2);
getTaskConfig().setDriverPairComparator(RecordPairComparatorFactory.get());
getTaskConfig().setDriverStrategy(DriverStrategy.CO_GROUP);
final CoGroupDriver<Record, Record, Record> testTask = new CoGroupDriver<Record, Record, Record>();
try {
testDriver(testTask, MockFailingCoGroupStub.class);
Assert.fail("Function exception was not forwarded.");
} catch (ExpectedTestException etex) {
// good!
} catch (Exception e) {
e.printStackTrace();
Assert.fail("The test caused an exception.");
}
}
@Test
public void testCancelCoGroupTaskWhileSorting1() {
int keyCnt = 10;
int valCnt = 2;
setOutput(this.output);
addInputComparator(this.comparator1);
addInputComparator(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 DelayingInfinitiveInputIterator(1000), this.comparator1.duplicate());
addInput(new UniformRecordGenerator(keyCnt, valCnt, true));
} catch (Exception e) {
e.printStackTrace();
Assert.fail("The test caused an exception.");
}
final AtomicBoolean success = new AtomicBoolean(false);
Thread taskRunner = new Thread() {
@Override
public void run() {
try {
testDriver(testTask, MockCoGroupStub.class);
success.set(true);
} catch (Exception ie) {
ie.printStackTrace();
}
}
};
taskRunner.start();
TaskCancelThread tct = new TaskCancelThread(1, taskRunner, this);
tct.start();
try {
tct.join();
taskRunner.join();
} catch(InterruptedException ie) {
Assert.fail("Joining threads failed");
}
Assert.assertTrue("Test threw an exception even though it was properly canceled.", success.get());
}
@Test
public void testCancelCoGroupTaskWhileSorting2() {
int keyCnt = 10;
int valCnt = 2;
setOutput(this.output);
addInputComparator(this.comparator1);
addInputComparator(this.comparator2);
getTaskConfig().setDriverPairComparator(RecordPairComparatorFactory.get());
getTaskConfig().setDriverStrategy(DriverStrategy.CO_GROUP);
final CoGroupDriver<Record, Record, Record> testTask = new CoGroupDriver<Record, Record, Record>();
try {
addInput(new UniformRecordGenerator(keyCnt, valCnt, true));
addInputSorted(new DelayingInfinitiveInputIterator(1000), this.comparator2.duplicate());
} catch (Exception e) {
e.printStackTrace();
Assert.fail("The test caused an exception.");
}
final AtomicBoolean success = new AtomicBoolean(false);
Thread taskRunner = new Thread() {
@Override
public void run() {
try {
testDriver(testTask, MockCoGroupStub.class);
success.set(true);
} catch (Exception ie) {
ie.printStackTrace();
}
}
};
taskRunner.start();
TaskCancelThread tct = new TaskCancelThread(1, taskRunner, this);
tct.start();
try {
tct.join();
taskRunner.join();
} catch(InterruptedException ie) {
Assert.fail("Joining threads failed");
}
Assert.assertTrue("Test threw an exception even though it was properly canceled.", success.get());
}
@Test
public void testCancelCoGroupTaskWhileCoGrouping()
{
int keyCnt = 100;
int valCnt = 5;
setOutput(this.output);
addInputComparator(this.comparator1);
addInputComparator(this.comparator2);
getTaskConfig().setDriverPairComparator(RecordPairComparatorFactory.get());
getTaskConfig().setDriverStrategy(DriverStrategy.CO_GROUP);
final CoGroupDriver<Record, Record, Record> testTask = new CoGroupDriver<Record, Record, Record>();
try {
addInput(new UniformRecordGenerator(keyCnt, valCnt, true));
addInput(new UniformRecordGenerator(keyCnt, valCnt, true));
} catch (Exception e) {
e.printStackTrace();
Assert.fail("The test caused an exception.");
}
final AtomicBoolean success = new AtomicBoolean(false);
Thread taskRunner = new Thread() {
@Override
public void run() {
try {
testDriver(testTask, MockDelayingCoGroupStub.class);
success.set(true);
} catch (Exception ie) {
ie.printStackTrace();
}
}
};
taskRunner.start();
TaskCancelThread tct = new TaskCancelThread(1, taskRunner, this);
tct.start();
try {
tct.join();
taskRunner.join();
} catch(InterruptedException ie) {
Assert.fail("Joining threads failed");
}
Assert.assertTrue("Test threw an exception even though it was properly canceled.", success.get());
}
public static class MockFailingCoGroupStub extends CoGroupFunction {
private static final long serialVersionUID = 1L;
private int cnt = 0;
@Override
public void coGroup(Iterator<Record> records1,
Iterator<Record> records2, Collector<Record> out) throws RuntimeException
{
int val1Cnt = 0;
while (records1.hasNext()) {
val1Cnt++;
records1.next();
}
while (records2.hasNext()) {
Record record2 = records2.next();
if (val1Cnt == 0) {
if(++this.cnt>=10) {
throw new ExpectedTestException();
}
out.collect(record2);
} else {
for (int i=0; i<val1Cnt; i++) {
if(++this.cnt>=10) {
throw new ExpectedTestException();
}
out.collect(record2);
}
}
}
}
}
public static final class MockDelayingCoGroupStub extends CoGroupFunction {
private static final long serialVersionUID = 1L;
@Override
public void coGroup(Iterator<Record> records1,
Iterator<Record> records2, Collector<Record> out) {
while (records1.hasNext()) {
try {
Thread.sleep(100);
} catch (InterruptedException e) { }
records1.next();
}
while (records2.hasNext()) {
try {
Thread.sleep(100);
} catch (InterruptedException e) { }
records2.next();
}
}
}
}