jasima.shopSim.prioRules.setup.FFCFS 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.prioRules.setup;
import jasima.shopSim.core.Job;
import jasima.shopSim.core.PR;
import jasima.shopSim.core.PrioRuleTarget;
import jasima.shopSim.core.PriorityQueue;
/**
* This class implements the Family First Come First Served rule, developed by
* Flynn (1987), which assigns highest priority to all jobs that belong to the
* family which includes the job that arrived first to the queue, see also
* Pickardt and Branke (2012).
*
* This rule should be used with another rule to distinguish jobs of the
* selected family.
*
* @author Christoph Pickardt, 2011-11-15
* @version "$Id: FFCFS.java 753 2015-07-27 15:29:49Z [email protected] $"
*/
public class FFCFS extends PR {
private static final long serialVersionUID = -9158038750813584890L;
@Override
public double calcPrio(PrioRuleTarget j) {
return -(earliestFamilyArrival(j));
}
public double earliestFamilyArrival(PrioRuleTarget j) {
final int family = j.getCurrentOperation().setupState;
final PriorityQueue q = j.getCurrMachine().queue;
assert q.size() > 0;
double at = Double.POSITIVE_INFINITY;
for (int i = 0; i < q.size(); i++) {
Job job = q.get(i);
if (job.getCurrentOperation().setupState == family
&& job.getArriveTime() < at) {
at = job.getArriveTime();
}
}
assert at != Double.POSITIVE_INFINITY;
return at;
}
}