randomsource.java

一个用于排队系统仿真的开源软件,有非常形象的图象仿真过程!

/**    
  * Copyright (C) 2006, Laboratorio di Valutazione delle Prestazioni - Politecnico di Milano

  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 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 General Public License for more details.

  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
  
package jmt.engine.NodeSections;

import jmt.engine.NetStrategies.ServiceStrategy;
import jmt.engine.QueueNet.Job;
import jmt.engine.QueueNet.JobClass;
import jmt.engine.QueueNet.NetEvent;
import jmt.engine.QueueNet.NetMessage;
import jmt.engine.random.Parameter;

import java.util.LinkedList;
import java.util.ListIterator;

/**
 * This class implements a job source (generator): a job is created every
 * <i>t</i> simulation time units using a statisitcal distribution according
 * to its class.
 * @author Francesco Radaelli, Federico Granata
 *
 */
public class RandomSource extends InputSection {

	public static int PARAMETERS_EXCEPTION = 0x0001;

	/** Service distribution: one for each job class. */
//	protected Distribution distributions[];

	/** Distribution parameters: one for each job class. */
	protected Parameter parameters[];

	private boolean coolStart;//when is true the waitingjobs queue is void

	private LinkedList waitingJobs;     //TODO: se riusciamo a convertire in job info list