| /* |
| * 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.apache.beam.sdk.transforms.DoFn.ProcessContinuation.stop; |
| import static org.junit.Assert.assertEquals; |
| |
| import java.io.Serializable; |
| import org.apache.beam.sdk.Pipeline; |
| import org.apache.beam.sdk.runners.AppliedPTransform; |
| 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.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.PCollectionTuple; |
| 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 extends RestrictionTracker<SomeRestriction, Void> { |
| private final SomeRestriction someRestriction; |
| |
| public SomeRestrictionTracker(SomeRestriction someRestriction) { |
| this.someRestriction = someRestriction; |
| } |
| |
| @Override |
| public boolean tryClaim(Void position) { |
| return false; |
| } |
| |
| @Override |
| public SomeRestriction currentRestriction() { |
| return someRestriction; |
| } |
| |
| @Override |
| public SomeRestriction checkpoint() { |
| return someRestriction; |
| } |
| |
| @Override |
| public void checkDone() {} |
| } |
| |
| private static class BoundedFakeFn extends DoFn<Integer, String> { |
| @ProcessElement |
| public void processElement( |
| ProcessContext context, RestrictionTracker<SomeRestriction, Void> tracker) {} |
| |
| @GetInitialRestriction |
| public SomeRestriction getInitialRestriction(Integer element) { |
| return null; |
| } |
| } |
| |
| private static class UnboundedFakeFn extends DoFn<Integer, String> { |
| @ProcessElement |
| public ProcessContinuation processElement( |
| ProcessContext context, RestrictionTracker<SomeRestriction, Void> tracker) { |
| return stop(); |
| } |
| |
| @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 PCollection<String> applySplittableParDo( |
| String name, PCollection<Integer> input, DoFn<Integer, String> fn) { |
| ParDo.MultiOutput<Integer, String> multiOutput = |
| ParDo.of(fn).withOutputTags(MAIN_OUTPUT_TAG, TupleTagList.empty()); |
| PCollectionTuple output = multiOutput.expand(input); |
| output.get(MAIN_OUTPUT_TAG).setName("main"); |
| AppliedPTransform<PCollection<Integer>, PCollectionTuple, ?> transform = |
| AppliedPTransform.of("ParDo", input.expand(), output.expand(), multiOutput, pipeline); |
| return input.apply(name, SplittableParDo.forAppliedParDo(transform)).get(MAIN_OUTPUT_TAG); |
| } |
| |
| @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, |
| applySplittableParDo("bounded to bounded", makeBoundedCollection(pipeline), boundedFn) |
| .isBounded()); |
| assertEquals( |
| "Applying a bounded SDF to an unbounded collection produces an unbounded collection", |
| PCollection.IsBounded.UNBOUNDED, |
| applySplittableParDo("bounded to unbounded", makeUnboundedCollection(pipeline), boundedFn) |
| .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, |
| applySplittableParDo("unbounded to bounded", makeBoundedCollection(pipeline), unboundedFn) |
| .isBounded()); |
| assertEquals( |
| "Applying an unbounded SDF to an unbounded collection produces an unbounded collection", |
| PCollection.IsBounded.UNBOUNDED, |
| applySplittableParDo( |
| "unbounded to unbounded", makeUnboundedCollection(pipeline), unboundedFn) |
| .isBounded()); |
| } |
| } |