src/edu/berkeley/fleet/ships/TokenFifo.java

   1 package edu.berkeley.fleet.ships;
   2 import edu.berkeley.fleet.*;
   3
   4 import java.util.*;
   5 import java.io.*;
   6
   7 public class TokenFifo extends Ship {
   8
   9     private int count = 0;
  10
  11     TokenOutbox out     = new TokenOutbox(this, "out");
  12     TokenInbox  in      = new TokenInbox(this, "in");
  13
  14     public TokenFifo(Fleet fleet, String name) {
  15         super(fleet, name);
  16     }
  17
  18     public void service() {
  19         if (in.tokenReadyForShip()) {
  20             count++;
  21             in.removeTokenForShip();
  22             return;
  23         }
  24         if (count > 0 && out.readyForTokenFromShip()) {
  25             count--;
  26             out.addTokenFromShip();
  27         }
  28     }
  29
  30 }