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* Licensed to the Apache Software Foundation (ASF) under one
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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.flink.test.state.operator.restore.unkeyed;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.test.state.operator.restore.ExecutionMode;
import static org.apache.flink.test.state.operator.restore.unkeyed.NonKeyedJob.createFirstStatefulMap;
import static org.apache.flink.test.state.operator.restore.unkeyed.NonKeyedJob.createSecondStatefulMap;
import static org.apache.flink.test.state.operator.restore.unkeyed.NonKeyedJob.createSource;
import static org.apache.flink.test.state.operator.restore.unkeyed.NonKeyedJob.createStatelessMap;
import static org.apache.flink.test.state.operator.restore.unkeyed.NonKeyedJob.createThirdStatefulMap;
/**
* Verifies that the state of all operators is restored if a topology change breaks up a chain.
*/
public class ChainBreakTest extends AbstractNonKeyedOperatorRestoreTestBase {
@Override
public void createRestoredJob(StreamExecutionEnvironment env) {
/**
* Original job: Source -> StatefulMap1 -> CHAIN(StatefulMap2 -> Map -> StatefulMap3)
* Modified job: Source -> StatefulMap1 -> CHAIN(StatefulMap2 -> Map) -> StatefulMap3
*/
DataStream<Integer> source = createSource(env, ExecutionMode.RESTORE);
SingleOutputStreamOperator<Integer> first = createFirstStatefulMap(ExecutionMode.RESTORE, source);
first.startNewChain();
SingleOutputStreamOperator<Integer> second = createSecondStatefulMap(ExecutionMode.RESTORE, first);
second.startNewChain();
SingleOutputStreamOperator<Integer> stateless = createStatelessMap(second);
SingleOutputStreamOperator<Integer> third = createThirdStatefulMap(ExecutionMode.RESTORE, stateless);
third.startNewChain();
}
}