www.pudn.com > JAVIS-0.3.zip > Queue.java

package animation;

import java.awt.*;
import animation.VisualElement;
//import math.Vector;
import java.util.Vector;

/**
    This class handles queues on the network.  Each queue corrseponds to a
    different node and will be displayed on the correct node.

    @author Steven Vischer
    @version 1.0
*/

public class Queue extends VisualElement {

    int m_src;
    int m_dest;
    int nodeX;  // x and y coordinates of the corresponding node
    int nodeY;  // for this queue
    Vector queuedPackets;

    public Queue() {
        nodeX=0;
        nodeY=0;
        queuedPackets=new Vector();
    }

    public int getSource() {
      return m_src;
    }

    public int getDest() {
      return m_dest;
    }

    public int getEndX() {
        int endx=nodeX+6;
        return endx;
    }

    public int getEndY() {
        int endy=nodeY-10-(8*(queuedPackets.size()-1));
        return endy;
    }
    /**
        Method called to add a packet to the queue.

        @param queuedPackets the Vector of packets currently in the queue.
    */
    public void enqueue(Packet p) {
      p.setStatus(Packet.PACKET_QUEUED);
      queuedPackets.addElement(p);
    }

    /**
        Method called to remove a packet from the queue.
    */
    public void dequeue(Packet p) {
      p.setStatus(Packet.PACKET_FREE);
      if(queuedPackets.size()>0) {
        for(int i=0; i0) {
        for(int i=0; i0) {
            g.setColor(Color.red);
            int coordX=nodeX+6;
            int coordY=nodeY-10;
            for(int i=0; i