jasima.core.expExecution.FutureWrapper Maven / Gradle / Ivy

/*******************************************************************************
 * This file is part of jasima, v1.3, the Java simulator for manufacturing and 
 * logistics.
 *  
 * Copyright (c) 2015 		jasima solutions UG
 * Copyright (c) 2010-2015 Torsten Hildebrandt and jasima contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 *******************************************************************************/
package jasima.core.expExecution;

import jasima.core.experiment.Experiment;
import jasima.core.util.Util;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * Thin wrapper around a {@link Future}, implementing {@link ExperimentFuture}.
 * 
 * @author Torsten Hildebrandt
 * @version 
 *          "$Id: FutureWrapper.java 753 2015-07-27 15:29:49Z [email protected] $"
 */
public class FutureWrapper implements ExperimentFuture {

	private final Experiment experiment;
	private final Future> future;
	private final long time;

	public FutureWrapper(Experiment e, Future> future) {
		super();
		this.experiment = e;
		this.future = future;
		this.time = System.currentTimeMillis();
	}

	@Override
	public boolean cancel(boolean mayInterruptIfRunning) {
		return future.cancel(mayInterruptIfRunning);
	}

	@Override
	public boolean isCancelled() {
		return future.isCancelled();
	}

	@Override
	public boolean isDone() {
		return future.isDone();
	}

	@Override
	public Map get() throws InterruptedException {
		try {
			return internalGet(-1l, null);
		} catch (TimeoutException e) {
			throw new AssertionError();
		}
	}

	@Override
	public Map get(long timeout, TimeUnit unit)
			throws InterruptedException, TimeoutException {
		return internalGet(timeout, unit);
	}

	protected Map internalGet(long timeout, TimeUnit unit)
			throws InterruptedException, TimeoutException {
		Map res;
		try {
			res = timeout < 0 ? future.get() : future.get(timeout, unit);
		} catch (ExecutionException ex) {
			Throwable cause = ex.getCause();

			// create "artificial" results map
			res = new HashMap();

			// estimate runtime by the time between creation of this future and
			// current time
			res.put(Experiment.RUNTIME,
					(System.currentTimeMillis() - time) / 1000.0d);

			// put error indications in result map
			res.put(Experiment.EXP_ABORTED, 1);
			res.put(Experiment.EXCEPTION_MESSAGE, cause.getMessage());
			res.put(Experiment.EXCEPTION, Util.exceptionToString(cause));
		}

		return res;
	}

	@Override
	public Experiment getExperiment() {
		return experiment;
	}

}