COMP2240-Assignment2/Code/P1_War.java

import java.util.concurrent.*;

public class P1_War implements Runnable{
   
    Semaphore sem;
    private int id;                     //ID number of the WAR
    private boolean atDock;             //Is the WAR at the dock? True if at dock
    private int trackNum;               //Which track does the WAR operate in? 1 or 2?
    boolean finished = false;
    int[] tracks;
    
    /**
     * WAR (Wharehouse Assistance Robot) object
     * @param idInput ID number for the WAR
     * @param trackNumInput The track that the WAR is on
     * @param atDockInput   Is the WAR at the dock (True) or at Storage (False)
     */
    public P1_War(int idInput, int trackNumInput, boolean atDockInput, Semaphore intersection,int[] tracksInput) {
        id = idInput;
        atDock = atDockInput;
        trackNum = trackNumInput;
        this.sem=intersection;
        tracks = tracksInput;
    }

    public void run()
    {
        String loadedState;
        String destination;

        while(!finished)
        {
            // if(tracks[0]>=150    && tracks[1] >=150)
            // {
            //     finished=true;
            //     break;
            // }

            //if(!finished)
            {
                if(atDock)
                {
                    loadedState = " (Loaded) ";
                    destination = "Dock";
                }
                else
                {
                    loadedState = " (Unloaded) ";
                    destination = "Storage";
                }  

                if(!(tracks[0]>=150 && tracks[1] >=150))
                {
                    System.out.println("WAR-"+id+loadedState+"Waiting at the Intersection. Going towards "+destination+trackNum);
                }
               
                //aquire semaphore
                sem.acquireUninterruptibly();
                if(tracks[0]>=150 && tracks[1] >=150)
                {
                    finished=true;
                }
                if(!finished)
                {
                    for(int i = 1; i<=3; i++)
                    {
                        System.out.println("WAR-"+id+loadedState+"Crossing intersection Checkpoint "+i+".");
                        try {
                            Thread.sleep(2);
                        } catch (InterruptedException e) {
                            // Don't care
                            //e.printStackTrace();
                        }
                    }

                    System.out.println("WAR-"+id+loadedState+"Crossed the intersection.");
                    atDock=!atDock;
                    
                    if(trackNum == 1)
                    {
                        tracks[0]++;
                    }
                    else if (trackNum == 2)
                    {
                        tracks[1]++;
                    }
                    System.out.println("Total crossed in Track1 "+tracks[0]+" Track2 "+tracks[1]);
                }
                sem.release();
            }            
        }
    }
    
    //Getters
    public int getID()
    {
        return id;
    }

    public boolean getAtDock()
    {
        return atDock;
    }

    public int getTrackNum()
    {
        return trackNum;
    }

    //Setters
    public void setAtDock(boolean atDockInput)
    {
        atDock=atDockInput;
    }

    public void setFinished(boolean input)
    {
        finished = input;
    }

}