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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.core.io.InputSplit;
import org.apache.flink.runtime.executiongraph.ExecutionAttemptID;
import org.apache.flink.runtime.instance.ActorGateway;
import org.apache.flink.runtime.jobgraph.JobVertexID;
import org.apache.flink.runtime.jobgraph.OperatorID;
import org.apache.flink.runtime.jobgraph.tasks.InputSplitProvider;
import org.apache.flink.runtime.jobgraph.tasks.InputSplitProviderException;
import org.apache.flink.runtime.messages.JobManagerMessages;
import org.apache.flink.util.InstantiationUtil;
import org.apache.flink.util.Preconditions;

import scala.concurrent.Await;
import scala.concurrent.Future;
import scala.concurrent.duration.FiniteDuration;

import java.util.List;
import java.util.Map;

/**
 * Implementation using {@link ActorGateway} to forward the messages.
 */
public class TaskInputSplitProvider implements InputSplitProvider {

	private final ActorGateway jobManager;

	private final JobID jobID;

	private final JobVertexID vertexID;

	private final ExecutionAttemptID executionID;

	private final FiniteDuration timeout;

	public TaskInputSplitProvider(
		ActorGateway jobManager,
		JobID jobID,
		JobVertexID vertexID,
		ExecutionAttemptID executionID,
		FiniteDuration timeout) {

		this.jobManager = Preconditions.checkNotNull(jobManager);
		this.jobID = Preconditions.checkNotNull(jobID);
		this.vertexID = Preconditions.checkNotNull(vertexID);
		this.executionID = Preconditions.checkNotNull(executionID);
		this.timeout = Preconditions.checkNotNull(timeout);
	}

	@Override
	public InputSplit getNextInputSplit(OperatorID operatorID, ClassLoader userCodeClassLoader) throws InputSplitProviderException {
		Preconditions.checkNotNull(operatorID);
		Preconditions.checkNotNull(userCodeClassLoader);

		final Future