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* 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,
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* See the License for the specific language governing permissions and
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package org.apache.beam.runners.direct;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import com.google.common.collect.Iterables;
import java.util.Collection;
import java.util.Collections;
import org.apache.beam.runners.direct.TestStreamEvaluatorFactory.DirectTestStreamFactory.DirectTestStream;
import org.apache.beam.runners.direct.TestStreamEvaluatorFactory.TestClock;
import org.apache.beam.runners.direct.TestStreamEvaluatorFactory.TestStreamIndex;
import org.apache.beam.sdk.coders.VarIntCoder;
import org.apache.beam.sdk.runners.AppliedPTransform;
import org.apache.beam.sdk.testing.TestPipeline;
import org.apache.beam.sdk.testing.TestStream;
import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
import org.apache.beam.sdk.util.WindowedValue;
import org.apache.beam.sdk.values.PCollection;
import org.apache.beam.sdk.values.TimestampedValue;
import org.hamcrest.Matchers;
import org.joda.time.Duration;
import org.joda.time.Instant;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link TestStreamEvaluatorFactory}. */
@RunWith(JUnit4.class)
public class TestStreamEvaluatorFactoryTest {
private TestStreamEvaluatorFactory factory;
private BundleFactory bundleFactory;
private EvaluationContext context;
@Rule
public TestPipeline p = TestPipeline.create().enableAbandonedNodeEnforcement(false);
private DirectRunner runner;
@Before
public void setup() {
context = mock(EvaluationContext.class);
runner = DirectRunner.fromOptions(TestPipeline.testingPipelineOptions());
factory = new TestStreamEvaluatorFactory(context);
bundleFactory = ImmutableListBundleFactory.create();
}
/** Demonstrates that returned evaluators produce elements in sequence. */
@Test
public void producesElementsInSequence() throws Exception {
TestStream<Integer> testStream = TestStream.create(VarIntCoder.of())
.addElements(1, 2, 3)
.advanceWatermarkTo(new Instant(0))
.addElements(TimestampedValue.atMinimumTimestamp(4),
TimestampedValue.atMinimumTimestamp(5),
TimestampedValue.atMinimumTimestamp(6))
.advanceProcessingTime(Duration.standardMinutes(10))
.advanceWatermarkToInfinity();
PCollection<Integer> streamVals =
p.apply(new DirectTestStream<Integer>(runner, testStream));
TestClock clock = new TestClock();
when(context.getClock()).thenReturn(clock);
when(context.createRootBundle()).thenReturn(bundleFactory.createRootBundle());
when(context.createBundle(streamVals))
.thenReturn(bundleFactory.createBundle(streamVals), bundleFactory.createBundle(streamVals));
AppliedPTransform<?, ?, ?> streamProducer = DirectGraphs.getProducer(streamVals);
Collection<CommittedBundle<?>> initialInputs =
new TestStreamEvaluatorFactory.InputProvider(context)
.getInitialInputs(streamProducer, 1);
@SuppressWarnings("unchecked")
CommittedBundle<TestStreamIndex<Integer>> initialBundle =
(CommittedBundle<TestStreamIndex<Integer>>) Iterables.getOnlyElement(initialInputs);
TransformEvaluator<TestStreamIndex<Integer>> firstEvaluator =
factory.forApplication(streamProducer, initialBundle);
firstEvaluator.processElement(Iterables.getOnlyElement(initialBundle.getElements()));
TransformResult<TestStreamIndex<Integer>> firstResult = firstEvaluator.finishBundle();
WindowedValue<TestStreamIndex<Integer>> firstResidual =
(WindowedValue<TestStreamIndex<Integer>>)
Iterables.getOnlyElement(firstResult.getUnprocessedElements());
assertThat(firstResidual.getValue().getIndex(), equalTo(1));
assertThat(firstResidual.getTimestamp(), equalTo(BoundedWindow.TIMESTAMP_MIN_VALUE));
CommittedBundle<TestStreamIndex<Integer>> secondBundle =
initialBundle.withElements(Collections.singleton(firstResidual));
TransformEvaluator<TestStreamIndex<Integer>> secondEvaluator =
factory.forApplication(streamProducer, secondBundle);
secondEvaluator.processElement(firstResidual);
TransformResult<TestStreamIndex<Integer>> secondResult = secondEvaluator.finishBundle();
WindowedValue<TestStreamIndex<Integer>> secondResidual =
(WindowedValue<TestStreamIndex<Integer>>)
Iterables.getOnlyElement(secondResult.getUnprocessedElements());
assertThat(secondResidual.getValue().getIndex(), equalTo(2));
assertThat(secondResidual.getTimestamp(), equalTo(new Instant(0)));
CommittedBundle<TestStreamIndex<Integer>> thirdBundle =
secondBundle.withElements(Collections.singleton(secondResidual));
TransformEvaluator<TestStreamIndex<Integer>> thirdEvaluator =
factory.forApplication(streamProducer, thirdBundle);
thirdEvaluator.processElement(secondResidual);
TransformResult<TestStreamIndex<Integer>> thirdResult = thirdEvaluator.finishBundle();
WindowedValue<TestStreamIndex<Integer>> thirdResidual =
(WindowedValue<TestStreamIndex<Integer>>)
Iterables.getOnlyElement(thirdResult.getUnprocessedElements());
assertThat(thirdResidual.getValue().getIndex(), equalTo(3));
assertThat(thirdResidual.getTimestamp(), equalTo(new Instant(0)));
Instant start = clock.now();
CommittedBundle<TestStreamIndex<Integer>> fourthBundle =
thirdBundle.withElements(Collections.singleton(thirdResidual));
TransformEvaluator<TestStreamIndex<Integer>> fourthEvaluator =
factory.forApplication(streamProducer, fourthBundle);
fourthEvaluator.processElement(thirdResidual);
TransformResult<TestStreamIndex<Integer>> fourthResult = fourthEvaluator.finishBundle();
assertThat(clock.now(), equalTo(start.plus(Duration.standardMinutes(10))));
WindowedValue<TestStreamIndex<Integer>> fourthResidual =
(WindowedValue<TestStreamIndex<Integer>>)
Iterables.getOnlyElement(fourthResult.getUnprocessedElements());
assertThat(fourthResidual.getValue().getIndex(), equalTo(4));
assertThat(fourthResidual.getTimestamp(), equalTo(new Instant(0)));
CommittedBundle<TestStreamIndex<Integer>> fifthBundle =
thirdBundle.withElements(Collections.singleton(fourthResidual));
TransformEvaluator<TestStreamIndex<Integer>> fifthEvaluator =
factory.forApplication(streamProducer, fifthBundle);
fifthEvaluator.processElement(fourthResidual);
TransformResult<TestStreamIndex<Integer>> fifthResult = fifthEvaluator.finishBundle();
assertThat(
Iterables.getOnlyElement(firstResult.getOutputBundles())
.commit(Instant.now())
.getElements(),
Matchers.<WindowedValue<?>>containsInAnyOrder(
WindowedValue.valueInGlobalWindow(1),
WindowedValue.valueInGlobalWindow(2),
WindowedValue.valueInGlobalWindow(3)));
assertThat(
Iterables.getOnlyElement(thirdResult.getOutputBundles())
.commit(Instant.now())
.getElements(),
Matchers.<WindowedValue<?>>containsInAnyOrder(
WindowedValue.valueInGlobalWindow(4),
WindowedValue.valueInGlobalWindow(5),
WindowedValue.valueInGlobalWindow(6)));
assertThat(fifthResult.getOutputBundles(), Matchers.emptyIterable());
assertThat(fifthResult.getWatermarkHold(), equalTo(BoundedWindow.TIMESTAMP_MAX_VALUE));
assertThat(fifthResult.getUnprocessedElements(), Matchers.emptyIterable());
}
}