blockingrouter.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.common.exception.NetException;
import jmt.engine.QueueNet.*;

/**
 * This class implements a blocking router, i.e. a router which sends a job inside
 * a region with constraints (the "blocking region"). The destination node has been
 * already defined (the node each job has been redirected from), therefore no
 * routing strategy is required.
 * @author  Stefano Omini
 */
public class BlockingRouter extends OutputSection {

	/** Property Identifier: Routing strategy.*/
	public static final int PROPERTY_ID_ROUTING_STRATEGY = 0x0101;
	/** Property Identifier: Busy.*/
	public static final int PROPERTY_ID_BUSY = 0x0102;

    //if true, router is waiting for an ack of a job previously sent
    private boolean busy;

    //TODO: dopo le modifiche non serve pi