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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.taskmanager;

import org.apache.flink.api.common.JobID;
import org.apache.flink.runtime.concurrent.FutureUtils;
import org.apache.flink.runtime.execution.ExecutionState;
import org.apache.flink.runtime.instance.ActorGateway;
import org.apache.flink.runtime.io.network.netty.PartitionProducerStateChecker;
import org.apache.flink.runtime.io.network.partition.ResultPartitionID;
import org.apache.flink.runtime.jobgraph.IntermediateDataSetID;
import org.apache.flink.runtime.messages.JobManagerMessages;
import org.apache.flink.util.Preconditions;

import java.util.concurrent.CompletableFuture;

import scala.concurrent.duration.FiniteDuration;
import scala.reflect.ClassTag$;

/**
 * This implementation uses {@link ActorGateway} to trigger the partition state check at the job
 * manager.
 */
public class ActorGatewayPartitionProducerStateChecker implements PartitionProducerStateChecker {

	private final ActorGateway jobManager;
	private final FiniteDuration timeout;

	public ActorGatewayPartitionProducerStateChecker(ActorGateway jobManager, FiniteDuration timeout) {
		this.jobManager = Preconditions.checkNotNull(jobManager);
		this.timeout = Preconditions.checkNotNull(timeout);
	}

	@Override
	public CompletableFuture requestPartitionProducerState(
			JobID jobId,
			IntermediateDataSetID intermediateDataSetId,
			ResultPartitionID resultPartitionId) {

		JobManagerMessages.RequestPartitionProducerState msg = new JobManagerMessages.RequestPartitionProducerState(
			jobId,
			intermediateDataSetId, resultPartitionId
		);

		scala.concurrent.Future futureResponse = jobManager
			.ask(msg, timeout)
			.mapTo(ClassTag$.MODULE$.apply(ExecutionState.class));

		return FutureUtils.toJava(futureResponse);
	}

}