org.apache.flink.runtime.io.network.partition.JobMasterPartitionTrackerImpl Maven / Gradle / Ivy

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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.runtime.io.network.partition;

import org.apache.flink.runtime.clusterframework.types.ResourceID;
import org.apache.flink.util.Preconditions;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Implementation of {@link JobMasterPartitionTracker}.
 */
public class JobMasterPartitionTrackerImpl implements JobMasterPartitionTracker {

	final Map> trackedPartitionsPerResource = new ConcurrentHashMap<>();
	final Map partitionInfos = new ConcurrentHashMap<>();

	@Override
	public void startTrackingPartition(ResourceID resourceID, ResultPartitionID resultPartitionID) {
		Preconditions.checkNotNull(resourceID);
		Preconditions.checkNotNull(resultPartitionID);

		partitionInfos.put(resultPartitionID, new PartitionInfo(resourceID, false));

		trackedPartitionsPerResource.compute(resourceID, (ignored, partitionIds) -> {
			if (partitionIds == null) {
				partitionIds = new HashSet<>();
			}
			partitionIds.add(resultPartitionID);
			return partitionIds;
		});
	}

	@Override
	public void stopTrackingPartition(ResultPartitionID resultPartitionID) {
		Preconditions.checkNotNull(resultPartitionID);

		final PartitionInfo partitionInfo = partitionInfos.remove(resultPartitionID);
		if (partitionInfo != null) {
			trackedPartitionsPerResource.computeIfPresent(
				partitionInfo.getResourceID(), (ignored, trackedResultPartitionIds) -> {
					trackedResultPartitionIds.remove(resultPartitionID);
					return trackedResultPartitionIds.isEmpty()
						? null
						: trackedResultPartitionIds;
				});
		}
	}

	@Override
	public Collection getTrackedPartitions(ResourceID resourceID) {
		Preconditions.checkNotNull(resourceID);

		return trackedPartitionsPerResource.getOrDefault(resourceID, Collections.emptySet());
	}

	@Override
	public boolean isPartitionFailed(ResultPartitionID resultPartitionID) {
		Preconditions.checkNotNull(resultPartitionID);

		PartitionInfo partitionInfo = partitionInfos.get(resultPartitionID);
		if (partitionInfo != null && partitionInfo.isFailed()) {
			return true;
		}
		return false;
	}

	@Override
	public void markPartitionFailed(ResultPartitionID resultPartitionID) {
		Preconditions.checkNotNull(resultPartitionID);

		PartitionInfo partitionInfo = partitionInfos.get(resultPartitionID);
		if (partitionInfo != null) {
			partitionInfo.markFailed();
		}
	}

	private static class PartitionInfo {

		private final ResourceID resourceID;
		private boolean isFailed;

		PartitionInfo(ResourceID resourceID, boolean isFailed) {
			this.resourceID = resourceID;
			this.isFailed = isFailed;
		}

		public ResourceID getResourceID() {
			return resourceID;
		}

		public boolean isFailed() {
			return isFailed;
		}

		public void markFailed() {
			this.isFailed = true;
		}
	}
}