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[FLINK-5163] Port the StatefulSequenceSource to the new state abstrac…
…tions.
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234 changes: 234 additions & 0 deletions
234
...va/src/test/java/org/apache/flink/streaming/api/functions/StatefulSequenceSourceTest.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,4 +1,238 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.flink.streaming.api.functions; | ||
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| import org.apache.flink.core.testutils.OneShotLatch; | ||
| import org.apache.flink.streaming.api.functions.source.SourceFunction; | ||
| import org.apache.flink.streaming.api.functions.source.StatefulSequenceSource; | ||
| import org.apache.flink.streaming.api.operators.StreamSource; | ||
| import org.apache.flink.streaming.api.watermark.Watermark; | ||
| import org.apache.flink.streaming.runtime.tasks.OperatorStateHandles; | ||
| import org.apache.flink.streaming.util.AbstractStreamOperatorTestHarness; | ||
| import org.junit.Assert; | ||
| import org.junit.Test; | ||
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| import java.util.ArrayList; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
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| public class StatefulSequenceSourceTest { | ||
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| @Test | ||
| public void testCheckpointRestore() throws Exception { | ||
| final int initElement = 0; | ||
| final int maxElement = 100; | ||
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| final Set<Long> expectedOutput = new HashSet<>(); | ||
| for (long i = initElement; i <= maxElement; i++) { | ||
| expectedOutput.add(i); | ||
| } | ||
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| final ConcurrentHashMap<String, List<Long>> outputCollector = new ConcurrentHashMap<>(); | ||
| final OneShotLatch latchToTrigger1 = new OneShotLatch(); | ||
| final OneShotLatch latchToWait1 = new OneShotLatch(); | ||
| final OneShotLatch latchToTrigger2 = new OneShotLatch(); | ||
| final OneShotLatch latchToWait2 = new OneShotLatch(); | ||
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| final StatefulSequenceSource source1 = new StatefulSequenceSource(initElement, maxElement); | ||
| StreamSource<Long, StatefulSequenceSource> src1 = new StreamSource<>(source1); | ||
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| final AbstractStreamOperatorTestHarness<Long> testHarness1 = | ||
| new AbstractStreamOperatorTestHarness<>(src1, 2, 2, 0); | ||
| testHarness1.open(); | ||
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| final StatefulSequenceSource source2 = new StatefulSequenceSource(initElement, maxElement); | ||
| StreamSource<Long, StatefulSequenceSource> src2 = new StreamSource<>(source2); | ||
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| final AbstractStreamOperatorTestHarness<Long> testHarness2 = | ||
| new AbstractStreamOperatorTestHarness<>(src2, 2, 2, 1); | ||
| testHarness2.open(); | ||
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| final Throwable[] error = new Throwable[3]; | ||
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| // run the source asynchronously | ||
| Thread runner1 = new Thread() { | ||
| @Override | ||
| public void run() { | ||
| try { | ||
| source1.run(new BlockingSourceContext("1", latchToTrigger1, latchToWait1, outputCollector, 21)); | ||
| } | ||
| catch (Throwable t) { | ||
| t.printStackTrace(); | ||
| error[0] = t; | ||
| } | ||
| } | ||
| }; | ||
|
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| // run the source asynchronously | ||
| Thread runner2 = new Thread() { | ||
| @Override | ||
| public void run() { | ||
| try { | ||
| source2.run(new BlockingSourceContext("2", latchToTrigger2, latchToWait2, outputCollector, 32)); | ||
| } | ||
| catch (Throwable t) { | ||
| t.printStackTrace(); | ||
| error[1] = t; | ||
| } | ||
| } | ||
| }; | ||
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| runner1.start(); | ||
| runner2.start(); | ||
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| if (!latchToTrigger1.isTriggered()) { | ||
| latchToTrigger1.await(); | ||
| } | ||
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| if (!latchToTrigger2.isTriggered()) { | ||
| latchToTrigger2.await(); | ||
| } | ||
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| OperatorStateHandles snapshot = AbstractStreamOperatorTestHarness.repackageState( | ||
| testHarness1.snapshot(0L, 0L), | ||
| testHarness2.snapshot(0L, 0L) | ||
| ); | ||
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| final StatefulSequenceSource source3 = new StatefulSequenceSource(initElement, maxElement); | ||
| StreamSource<Long, StatefulSequenceSource> src3 = new StreamSource<>(source3); | ||
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| final AbstractStreamOperatorTestHarness<Long> testHarness3 = | ||
| new AbstractStreamOperatorTestHarness<>(src3, 2, 1, 0); | ||
| testHarness3.setup(); | ||
| testHarness3.initializeState(snapshot); | ||
| testHarness3.open(); | ||
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| final OneShotLatch latchToTrigger3 = new OneShotLatch(); | ||
| final OneShotLatch latchToWait3 = new OneShotLatch(); | ||
| latchToWait3.trigger(); | ||
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| // run the source asynchronously | ||
| Thread runner3 = new Thread() { | ||
| @Override | ||
| public void run() { | ||
| try { | ||
| source3.run(new BlockingSourceContext("3", latchToTrigger3, latchToWait3, outputCollector, 3)); | ||
| } | ||
| catch (Throwable t) { | ||
| t.printStackTrace(); | ||
| error[2] = t; | ||
| } | ||
| } | ||
| }; | ||
| runner3.start(); | ||
| runner3.join(); | ||
|
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| Assert.assertEquals(3, outputCollector.size()); // we have 3 tasks. | ||
|
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| // test for at-most-once | ||
| Set<Long> dedupRes = new HashSet<>(Math.abs(maxElement - initElement) + 1); | ||
| for (Map.Entry<String, List<Long>> elementsPerTask: outputCollector.entrySet()) { | ||
| String key = elementsPerTask.getKey(); | ||
| List<Long> elements = outputCollector.get(key); | ||
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| // this tests the correctness of the latches in the test | ||
| Assert.assertTrue(elements.size() > 0); | ||
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| for (Long elem : elements) { | ||
| if (!dedupRes.add(elem)) { | ||
| Assert.fail("Duplicate entry: " + elem); | ||
| } | ||
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| if (!expectedOutput.contains(elem)) { | ||
| Assert.fail("Unexpected element: " + elem); | ||
| } | ||
| } | ||
| } | ||
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| // test for exactly-once | ||
| Assert.assertEquals(Math.abs(initElement - maxElement) + 1, dedupRes.size()); | ||
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| latchToWait1.trigger(); | ||
| latchToWait2.trigger(); | ||
| } | ||
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| private static class BlockingSourceContext implements SourceFunction.SourceContext<Long> { | ||
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| private final String name; | ||
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| private final Object lock; | ||
| private final OneShotLatch latchToTrigger; | ||
| private final OneShotLatch latchToWait; | ||
| private final ConcurrentHashMap<String, List<Long>> collector; | ||
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| private final int threshold; | ||
| private int counter = 0; | ||
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| private final List<Long> localOutput; | ||
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| public BlockingSourceContext(String name, OneShotLatch latchToTrigger, OneShotLatch latchToWait, | ||
| ConcurrentHashMap<String, List<Long>> output, int elemToFire) { | ||
| this.name = name; | ||
| this.lock = new Object(); | ||
| this.latchToTrigger = latchToTrigger; | ||
| this.latchToWait = latchToWait; | ||
| this.collector = output; | ||
| this.threshold = elemToFire; | ||
|
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| this.localOutput = new ArrayList<>(); | ||
| List<Long> prev = collector.put(name, localOutput); | ||
| if (prev != null) { | ||
| Assert.fail(); | ||
| } | ||
| } | ||
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| @Override | ||
| public void collectWithTimestamp(Long element, long timestamp) { | ||
| collect(element); | ||
| } | ||
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| @Override | ||
| public void collect(Long element) { | ||
| localOutput.add(element); | ||
| if (++counter == threshold) { | ||
| latchToTrigger.trigger(); | ||
| try { | ||
| if (!latchToWait.isTriggered()) { | ||
| latchToWait.await(); | ||
| } | ||
| } catch (InterruptedException e) { | ||
| e.printStackTrace(); | ||
| } | ||
| } | ||
| } | ||
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| @Override | ||
| public void emitWatermark(Watermark mark) { | ||
| } | ||
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| @Override | ||
| public Object getCheckpointLock() { | ||
| return lock; | ||
| } | ||
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| @Override | ||
| public void close() { | ||
| } | ||
| } | ||
| } |