org.apache.flink.runtime.executiongraph.restart.RestartStrategyResolving Maven / Gradle / Ivy
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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,
* 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.runtime.executiongraph.restart;
import org.apache.flink.api.common.restartstrategy.RestartStrategies;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* Utility method for resolving {@link RestartStrategy}.
*/
public final class RestartStrategyResolving {
/**
* Resolves which {@link RestartStrategy} to use. It should be used only on the server side.
* The resolving strategy is as follows:
*
* - Strategy set within job graph.
* - Strategy set flink-conf.yaml on the server set, unless is set to {@link NoRestartStrategy} and checkpointing
* is enabled.
* - If no strategy was set on client and server side and checkpointing was enabled then
* {@link FixedDelayRestartStrategy} is used
*
*
* @param clientConfiguration restart configuration given within the job graph
* @param serverStrategyFactory default server side strategy factory
* @param isCheckpointingEnabled if checkpointing was enabled for the job
* @return resolved strategy
*/
public static RestartStrategy resolve(
RestartStrategies.RestartStrategyConfiguration clientConfiguration,
RestartStrategyFactory serverStrategyFactory,
boolean isCheckpointingEnabled) {
checkNotNull(serverStrategyFactory);
final RestartStrategy clientSideRestartStrategy =
RestartStrategyFactory.createRestartStrategy(clientConfiguration);
if (clientSideRestartStrategy != null) {
return clientSideRestartStrategy;
} else {
if (serverStrategyFactory instanceof NoOrFixedIfCheckpointingEnabledRestartStrategyFactory) {
return ((NoOrFixedIfCheckpointingEnabledRestartStrategyFactory) serverStrategyFactory)
.createRestartStrategy(isCheckpointingEnabled);
} else {
return serverStrategyFactory.createRestartStrategy();
}
}
}
private RestartStrategyResolving() {
}
}