jasima.shopSim.core.MaintenanceSource 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.shopSim.core;

/**
 * This class can be used to model scheduled maintenance. Maintenance intervals
 * and duration are modeled using the {@code timeBetweenFailures} and
 * {@code timeToRepair} settings. The difference to {@link DowntimeSource} is
 * that {@code timeBetweenFailures} uses the beginning of the last
 * maintenance as the reference, whereas {@link DowntimeSource} uses the
 * end of the last downtime.
 * 
 * A simple example: consider a machine that is going to be down every 24 hours
 * for a duration of 1 hour, i.e., it is available for processing for 23 hours.
 * Using {@code MaintenanceSource}, this is modeled setting
 * {@code timeBetweenFailures} to 24 hours and using a {@code timeToRepair} of 1
 * hour.
 * 
 * @see DowntimeSource
 * @author Torsten Hildebrandt, 2014-04-16
 * @version 
 *          "$Id: MaintenanceSource.java 753 2015-07-27 15:29:49Z [email protected] $"
 */
public class MaintenanceSource extends DowntimeSource {

	private double lastDeactivate;

	public MaintenanceSource(IndividualMachine machine) {
		super(machine);
	}

	@Override
	public void init() {
		super.init();
		lastDeactivate = getMachine().workStation.shop().simTime();
	}

	@Override
	protected double calcDeactivateTime(JobShop shop) {
		lastDeactivate = lastDeactivate + getTimeBetweenFailures().nextDbl();
		return lastDeactivate;
	}

}