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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.executiongraph;

import org.apache.flink.runtime.accumulators.StringifiedAccumulatorResult;
import org.apache.flink.runtime.execution.ExecutionState;
import org.apache.flink.runtime.taskmanager.TaskManagerLocation;
import org.apache.flink.util.ExceptionUtils;

import java.io.Serializable;

public class ArchivedExecution implements AccessExecution, Serializable {
	private static final long serialVersionUID = 4817108757483345173L;
	// --------------------------------------------------------------------------------------------

	private final ExecutionAttemptID attemptId;

	private final long[] stateTimestamps;

	private final int attemptNumber;

	private final ExecutionState state;

	private final String failureCause;          // once assigned, never changes

	private final TaskManagerLocation assignedResourceLocation; // for the archived execution

	/* Continuously updated map of user-defined accumulators */
	private final StringifiedAccumulatorResult[] userAccumulators;

	private final int parallelSubtaskIndex;

	private final IOMetrics ioMetrics;

	public ArchivedExecution(Execution execution) {
		this.userAccumulators = execution.getUserAccumulatorsStringified();
		this.attemptId = execution.getAttemptId();
		this.attemptNumber = execution.getAttemptNumber();
		this.stateTimestamps = execution.getStateTimestamps();
		this.parallelSubtaskIndex = execution.getVertex().getParallelSubtaskIndex();
		this.state = execution.getState();
		this.failureCause = ExceptionUtils.stringifyException(execution.getFailureCause());
		this.assignedResourceLocation = execution.getAssignedResourceLocation();
		this.ioMetrics = execution.getIOMetrics();
	}

	public ArchivedExecution(
			StringifiedAccumulatorResult[] userAccumulators, IOMetrics ioMetrics,
			ExecutionAttemptID attemptId, int attemptNumber, ExecutionState state, String failureCause,
			TaskManagerLocation assignedResourceLocation, int parallelSubtaskIndex, long[] stateTimestamps) {
		this.userAccumulators = userAccumulators;
		this.ioMetrics = ioMetrics;
		this.failureCause = failureCause;
		this.assignedResourceLocation = assignedResourceLocation;
		this.attemptNumber = attemptNumber;
		this.attemptId = attemptId;
		this.state = state;
		this.stateTimestamps = stateTimestamps;
		this.parallelSubtaskIndex = parallelSubtaskIndex;
	}

	// --------------------------------------------------------------------------------------------
	//   Accessors
	// --------------------------------------------------------------------------------------------

	@Override
	public ExecutionAttemptID getAttemptId() {
		return attemptId;
	}

	@Override
	public int getAttemptNumber() {
		return attemptNumber;
	}

	@Override
	public long[] getStateTimestamps() {
		return stateTimestamps;
	}

	@Override
	public ExecutionState getState() {
		return state;
	}

	@Override
	public TaskManagerLocation getAssignedResourceLocation() {
		return assignedResourceLocation;
	}

	@Override
	public String getFailureCauseAsString() {
		return failureCause;
	}

	@Override
	public long getStateTimestamp(ExecutionState state) {
		return this.stateTimestamps[state.ordinal()];
	}

	@Override
	public StringifiedAccumulatorResult[] getUserAccumulatorsStringified() {
		return userAccumulators;
	}


	@Override
	public int getParallelSubtaskIndex() {
		return parallelSubtaskIndex;
	}

	@Override
	public IOMetrics getIOMetrics() {
		return ioMetrics;
	}
}