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[FLINK-9316][streaming] Expose operator's unique ID in DataStream pro…
…grams This allows to uniquely and stably across multiple job submissions identify operators. Previously two different operators that were executed by tasks that had the same name were indistinguishable.
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...-java/src/test/java/org/apache/flink/streaming/api/operators/GetOperatorUniqueIDTest.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:https://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.operators; | ||
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| import org.apache.flink.api.common.functions.AbstractRichFunction; | ||
| import org.apache.flink.api.common.functions.MapFunction; | ||
| import org.apache.flink.configuration.Configuration; | ||
| import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; | ||
| import org.apache.flink.util.TestLogger; | ||
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| import org.junit.Test; | ||
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| import static org.apache.flink.util.Preconditions.checkNotNull; | ||
| import static org.junit.Assert.assertEquals; | ||
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| /** | ||
| * Tests the uid translation to {@link org.apache.flink.runtime.jobgraph.OperatorID}. | ||
| */ | ||
| @SuppressWarnings("serial") | ||
| public class GetOperatorUniqueIDTest extends TestLogger { | ||
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| /** | ||
| * If expected values ever change double check that the change is not braking the contract of | ||
| * {@link StreamingRuntimeContext#getOperatorUniqueID()} being stable between job submissions. | ||
| */ | ||
| @Test | ||
| public void testGetOperatorUniqueID() throws Exception { | ||
| StreamExecutionEnvironment env = StreamExecutionEnvironment.createLocalEnvironment(); | ||
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| env.fromElements(1, 2, 3) | ||
| .map(new VerifyOperatorIDMapFunction("6c4f323f22da8fb6e34f80c61be7a689")).uid("42") | ||
| .map(new VerifyOperatorIDMapFunction("3e129e83691e7737fbf876b47452acbc")).uid("44"); | ||
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| env.execute(); | ||
| } | ||
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| private static class VerifyOperatorIDMapFunction extends AbstractRichFunction implements MapFunction<Integer, Integer> { | ||
| private static final long serialVersionUID = 6584823409744624276L; | ||
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| private final String expectedOperatorUniqueID; | ||
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| public VerifyOperatorIDMapFunction(String expectedOperatorUniqueID) { | ||
| this.expectedOperatorUniqueID = checkNotNull(expectedOperatorUniqueID); | ||
| } | ||
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| @Override | ||
| public void open(Configuration parameters) throws Exception { | ||
| super.open(parameters); | ||
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| assertEquals(expectedOperatorUniqueID, ((StreamingRuntimeContext) getRuntimeContext()).getOperatorUniqueID()); | ||
| } | ||
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| @Override | ||
| public Integer map(Integer value) throws Exception { | ||
| return value; | ||
| } | ||
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| } | ||
| } |
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