servicetunnel.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.QueueNet.NetMessage;
import jmt.engine.QueueNet.NetNode;
import jmt.engine.QueueNet.NodeSection;

/**
 * This class implements a "tunnel" service section. Every message
 * sent from the input section is forwarded to the output section and every
 * message sent the from output section is backwarded to the intput section.
 * @author Francesco Radaelli
 */
public class ServiceTunnel extends ServiceSection {

	/** Creates a new instance of ServiceTunnel.
	 */
	public ServiceTunnel() {
		super();

        //NEW
        //@author Stefano Omini
        //log = NetSystem.getLog();
        //end NEW
	}




    //NEW
    //@author Stefano Omini
    /** Creates a new instance of ServiceTunnel.
	 */
	public ServiceTunnel(boolean auto) {
		super(auto);
    }


    public void NodeLinked(NetNode node) {
        //if (jobsList == null)
		//	jobsList = new JobInfoList(getJobClasses().size(), true);

    }
    //end NEW


	protected int process(NetMessage message) throws jmt.common.exception.NetException {

        if (isMyOwnerNode(message.getSource())) {
			if (message.getSourceSection() == NodeSection.INPUT) {
				sendForward(message.getEvent(), message.getData(), 0.0);

				//log.write(NetLog.LEVEL_DEBUG, message.getJob(), this, NetLog.JOB_OUT);
			}
			if (message.getSourceSection() == NodeSection.OUTPUT) {
				sendBackward(message.getEvent(), message.getData(), 0.0);

                //log.write(NetLog.LEVEL_ALL, message.getJob(), this, NetLog.ACK_JOB);
			}
			return MSG_PROCESSED;
		} else
			return MSG_NOT_PROCESSED;
	}
}