org.apache.flink.runtime.checkpoint.CheckpointCoordinatorDeActivator Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of flink-runtime_2.10 Show documentation

There is a newer version: 1.3.3

/*
 * 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.runtime.checkpoint;

import org.apache.flink.runtime.akka.FlinkUntypedActor;
import org.apache.flink.runtime.jobgraph.JobStatus;
import org.apache.flink.runtime.messages.ExecutionGraphMessages;
import org.apache.flink.util.Preconditions;

import java.util.UUID;

/**
 * This actor listens to changes in the JobStatus and activates or deactivates the periodic
 * checkpoint scheduler.
 */
public class CheckpointCoordinatorDeActivator extends FlinkUntypedActor {

	private final CheckpointCoordinator coordinator;
	private final UUID leaderSessionID;
	
	public CheckpointCoordinatorDeActivator(
			CheckpointCoordinator coordinator,
			UUID leaderSessionID) {

		LOG.info("Create CheckpointCoordinatorDeActivator");

		this.coordinator = Preconditions.checkNotNull(coordinator, "The checkpointCoordinator must not be null.");
		this.leaderSessionID = leaderSessionID;
	}

	@Override
	public void handleMessage(Object message) throws Exception {
		if (message instanceof ExecutionGraphMessages.JobStatusChanged) {
			JobStatus status = ((ExecutionGraphMessages.JobStatusChanged) message).newJobStatus();
			
			if (status == JobStatus.RUNNING) {
				// start the checkpoint scheduler
				coordinator.startCheckpointScheduler();
			} else {
				// anything else should stop the trigger for now
				coordinator.stopCheckpointScheduler();
			}
		}
		
		// we ignore all other messages
	}

	@Override
	public UUID getLeaderSessionID() {
		return leaderSessionID;
	}
}