/*
* 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.beam.runners.core.construction;
import static org.junit.Assert.assertEquals;
import java.io.Serializable;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.testing.TestPipeline;
import org.apache.beam.sdk.transforms.Create;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.DoFn.BoundedPerElement;
import org.apache.beam.sdk.transforms.DoFn.UnboundedPerElement;
import org.apache.beam.sdk.transforms.ParDo;
import org.apache.beam.sdk.transforms.splittabledofn.HasDefaultTracker;
import org.apache.beam.sdk.transforms.splittabledofn.RestrictionTracker;
import org.apache.beam.sdk.values.PCollection;
import org.apache.beam.sdk.values.TupleTag;
import org.apache.beam.sdk.values.TupleTagList;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link SplittableParDo}. */
@RunWith(JUnit4.class)
public class SplittableParDoTest {
// ----------------- Tests for whether the transform sets boundedness correctly --------------
private static class SomeRestriction
implements Serializable, HasDefaultTracker<SomeRestriction, SomeRestrictionTracker> {
@Override
public SomeRestrictionTracker newTracker() {
return new SomeRestrictionTracker(this);
}
}
private static class SomeRestrictionTracker implements RestrictionTracker<SomeRestriction> {
private final SomeRestriction someRestriction;
public SomeRestrictionTracker(SomeRestriction someRestriction) {
this.someRestriction = someRestriction;
}
@Override
public SomeRestriction currentRestriction() {
return someRestriction;
}
@Override
public SomeRestriction checkpoint() {
return someRestriction;
}
@Override
public void checkDone() {}
}
@BoundedPerElement
private static class BoundedFakeFn extends DoFn<Integer, String> {
@ProcessElement
public void processElement(ProcessContext context, SomeRestrictionTracker tracker) {}
@GetInitialRestriction
public SomeRestriction getInitialRestriction(Integer element) {
return null;
}
}
@UnboundedPerElement
private static class UnboundedFakeFn extends DoFn<Integer, String> {
@ProcessElement
public void processElement(ProcessContext context, SomeRestrictionTracker tracker) {}
@GetInitialRestriction
public SomeRestriction getInitialRestriction(Integer element) {
return null;
}
}
private static PCollection<Integer> makeUnboundedCollection(Pipeline pipeline) {
return pipeline
.apply("unbounded", Create.of(1, 2, 3))
.setIsBoundedInternal(PCollection.IsBounded.UNBOUNDED);
}
private static PCollection<Integer> makeBoundedCollection(Pipeline pipeline) {
return pipeline
.apply("bounded", Create.of(1, 2, 3))
.setIsBoundedInternal(PCollection.IsBounded.BOUNDED);
}
private static final TupleTag<String> MAIN_OUTPUT_TAG = new TupleTag<String>() {};
private ParDo.MultiOutput<Integer, String> makeParDo(DoFn<Integer, String> fn) {
return ParDo.of(fn).withOutputTags(MAIN_OUTPUT_TAG, TupleTagList.empty());
}
@Rule
public TestPipeline pipeline = TestPipeline.create();
@Test
public void testBoundednessForBoundedFn() {
pipeline.enableAbandonedNodeEnforcement(false);
DoFn<Integer, String> boundedFn = new BoundedFakeFn();
assertEquals(
"Applying a bounded SDF to a bounded collection produces a bounded collection",
PCollection.IsBounded.BOUNDED,
makeBoundedCollection(pipeline)
.apply("bounded to bounded", new SplittableParDo<>(makeParDo(boundedFn)))
.get(MAIN_OUTPUT_TAG)
.isBounded());
assertEquals(
"Applying a bounded SDF to an unbounded collection produces an unbounded collection",
PCollection.IsBounded.UNBOUNDED,
makeUnboundedCollection(pipeline)
.apply("bounded to unbounded", new SplittableParDo<>(makeParDo(boundedFn)))
.get(MAIN_OUTPUT_TAG)
.isBounded());
}
@Test
public void testBoundednessForUnboundedFn() {
pipeline.enableAbandonedNodeEnforcement(false);
DoFn<Integer, String> unboundedFn = new UnboundedFakeFn();
assertEquals(
"Applying an unbounded SDF to a bounded collection produces a bounded collection",
PCollection.IsBounded.UNBOUNDED,
makeBoundedCollection(pipeline)
.apply("unbounded to bounded", new SplittableParDo<>(makeParDo(unboundedFn)))
.get(MAIN_OUTPUT_TAG)
.isBounded());
assertEquals(
"Applying an unbounded SDF to an unbounded collection produces an unbounded collection",
PCollection.IsBounded.UNBOUNDED,
makeUnboundedCollection(pipeline)
.apply("unbounded to unbounded", new SplittableParDo<>(makeParDo(unboundedFn)))
.get(MAIN_OUTPUT_TAG)
.isBounded());
}
}