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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.deployment;

import org.apache.flink.runtime.executiongraph.IntermediateResult;
import org.apache.flink.runtime.io.network.ConnectionID;
import org.apache.flink.runtime.taskmanager.TaskManagerLocation;

/**
 * Tracks the location of internal result partition, that is, the result partitions served by taskmanager.
 */
public class InternalResultPartitionLocationTracker implements ResultPartitionLocationTracker {
	@Override
	public ResultPartitionLocation getResultPartitionLocation(
		TaskManagerLocation producerLocation,
		TaskManagerLocation consumerLocation,
		IntermediateResult intermediateResult) {
		if (consumerLocation.getResourceID().equals(producerLocation.getResourceID())) {
			// in the same taskmanager
			return ResultPartitionLocation.createLocal();
		} else {
			// use the taskmanager ip and data port
			ConnectionID connectionId = new ConnectionID(producerLocation, intermediateResult.getConnectionIndex());

			return ResultPartitionLocation.createRemote(connectionId);
		}
	}
}