/*
* 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 java.util.concurrent.atomic.AtomicBoolean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.flink.api.common.functions.GenericCollectorMap;
import org.apache.flink.api.java.record.functions.MapFunction;
import org.apache.flink.runtime.operators.CollectorMapDriver;
import org.apache.flink.runtime.operators.testutils.DiscardingOutputCollector;
import org.apache.flink.runtime.operators.testutils.DriverTestBase;
import org.apache.flink.runtime.operators.testutils.ExpectedTestException;
import org.apache.flink.runtime.operators.testutils.InfiniteInputIterator;
import org.apache.flink.runtime.operators.testutils.TaskCancelThread;
import org.apache.flink.runtime.operators.testutils.UniformRecordGenerator;
import org.apache.flink.types.Record;
import org.apache.flink.util.Collector;
import org.junit.Assert;
import org.junit.Test;
@SuppressWarnings("deprecation")
public class MapTaskTest extends DriverTestBase<GenericCollectorMap<Record, Record>> {
private static final Logger LOG = LoggerFactory.getLogger(MapTaskTest.class);
private final CountingOutputCollector output = new CountingOutputCollector();
public MapTaskTest() {
super(0, 0);
}
@Test
public void testMapTask() {
final int keyCnt = 100;
final int valCnt = 20;
addInput(new UniformRecordGenerator(keyCnt, valCnt, false));
setOutput(this.output);
final CollectorMapDriver<Record, Record> testDriver = new CollectorMapDriver<Record, Record>();
try {
testDriver(testDriver, MockMapStub.class);
} catch (Exception e) {
LOG.debug("Exception while running the test driver.", e);
Assert.fail("Invoke method caused exception.");
}
Assert.assertEquals("Wrong result set size.", keyCnt*valCnt, this.output.getNumberOfRecords());
}
@Test
public void testFailingMapTask() {
final int keyCnt = 100;
final int valCnt = 20;
addInput(new UniformRecordGenerator(keyCnt, valCnt, false));
setOutput(new DiscardingOutputCollector<Record>());
final CollectorMapDriver<Record, Record> testTask = new CollectorMapDriver<Record, Record>();
try {
testDriver(testTask, MockFailingMapStub.class);
Assert.fail("Function exception was not forwarded.");
} catch (ExpectedTestException e) {
// good!
} catch (Exception e) {
e.printStackTrace();
Assert.fail("Exception in test.");
}
}
@Test
public void testCancelMapTask() {
addInput(new InfiniteInputIterator());
setOutput(new DiscardingOutputCollector<Record>());
final CollectorMapDriver<Record, Record> testTask = new CollectorMapDriver<Record, Record>();
final AtomicBoolean success = new AtomicBoolean(false);
final Thread taskRunner = new Thread() {
@Override
public void run() {
try {
testDriver(testTask, MockMapStub.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 MockMapStub extends MapFunction {
private static final long serialVersionUID = 1L;
@Override
public void map(Record record, Collector<Record> out) throws Exception {
out.collect(record);
}
}
public static class MockFailingMapStub extends MapFunction {
private static final long serialVersionUID = 1L;
private int cnt = 0;
@Override
public void map(Record record, Collector<Record> out) throws Exception {
if (++this.cnt >= 10) {
throw new ExpectedTestException();
}
out.collect(record);
}
}
}