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92
...a/src/test/java/org/apache/flink/streaming/api/datastream/ConsecutiveSplitSelectTest.java
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| /* | ||
| * 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.streaming.api.datastream; | ||
|
|
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| import org.apache.flink.streaming.api.collector.selector.OutputSelector; | ||
| import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; | ||
| import org.apache.flink.streaming.api.functions.sink.DiscardingSink; | ||
|
|
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| import org.apache.commons.collections.IteratorUtils; | ||
| import org.junit.Assert; | ||
| import org.junit.Test; | ||
|
|
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
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| /** | ||
| * Test the {@link OutputSelector} for consecutive split and select. | ||
| */ | ||
| public class ConsecutiveSplitSelectTest { | ||
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| @Test | ||
| public void testConsecutiveSplitSelect() { | ||
| StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); | ||
| DataStream<String> dataStream = env.fromElements("a1", "a2"); | ||
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| SplitStream<String> splitStream1 = dataStream.split(new OutputSelector<String>() { | ||
| @Override public Iterable<String> select(String value) { | ||
| List<String> output = new ArrayList<>(1); | ||
| if (value.equals("a1")) { | ||
| output.add("name1"); | ||
| } else { | ||
| output.add("name2"); | ||
| } | ||
| return output; | ||
| } | ||
| }); | ||
| SplitStream<String> splitStream2 = splitStream1.select("name1").split(new OutputSelector<String>() { | ||
| @Override public Iterable<String> select(String value) { | ||
| List<String> output = new ArrayList<>(1); | ||
| if (value.equals("a1")) { | ||
| output.add("name4"); | ||
| } else { | ||
| output.add("name5"); | ||
| } | ||
| return output; | ||
| } | ||
| }); | ||
| splitStream1.addSink(new DiscardingSink<>()); | ||
| splitStream2.addSink(new DiscardingSink<>()); | ||
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| List<OutputSelector<?>> outputSelectors = env.getStreamGraph().getStreamNode(1).getOutputSelectors(); | ||
| OutputSelector<String> outputSelector1 = (OutputSelector<String>) outputSelectors.get(0); | ||
| OutputSelector<String> outputSelector2 = (OutputSelector<String>) outputSelectors.get(1); | ||
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| List<String> actualResult = IteratorUtils.toList(outputSelector1.select("a1").iterator()); | ||
| List<String> expectedResult = new ArrayList<>(); | ||
| expectedResult.add("name1"); | ||
| validateAndCleanUpTwoList(actualResult, expectedResult); | ||
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| actualResult = IteratorUtils.toList(outputSelector2.select("a1").iterator()); | ||
| expectedResult.add("name4"); | ||
| validateAndCleanUpTwoList(actualResult, expectedResult); | ||
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| actualResult = IteratorUtils.toList(outputSelector1.select("a2").iterator()); | ||
| expectedResult.add("name2"); | ||
| validateAndCleanUpTwoList(actualResult, expectedResult); | ||
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| actualResult = IteratorUtils.toList(outputSelector2.select("a2").iterator()); | ||
| validateAndCleanUpTwoList(actualResult, expectedResult); | ||
| } | ||
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| private void validateAndCleanUpTwoList(List<String> actualResult, List<String> expectedResult) { | ||
| Assert.assertArrayEquals(actualResult.toArray(), expectedResult.toArray()); | ||
| actualResult.clear(); | ||
| expectedResult.clear(); | ||
| } | ||
| } |
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