WhiteBoard.WbServerImpl Class Reference

Inheritance diagram for WhiteBoard.WbServerImpl:

Collaboration diagram for WhiteBoard.WbServerImpl:

Public Member Functions
void	addClient (WbClient wc, String brdnm) throws java.rmi.RemoteException
void	addLine (LineCoords ln, String brdnm) throws java.rmi.RemoteException
void	delClient (WbClient wc, String brdnm) throws java.rmi.RemoteException
void	sendAllLines (WbClient wc, String brdnm) throws java.rmi.RemoteException
	WbServerImpl (String[] args) throws Exception

Static Public Member Functions
static void	main (String args[])

Private Member Functions
ABoard	findAboard (String brdnm)
void	pleaseDie ()
void	sendAllLines (WbClient wc, ABoard ab)

Private Attributes
String	myURL
Vector< ABoard >	vBoards

Detailed Description

Definition at line 22 of file WbServerImpl.java.

Constructor & Destructor Documentation

WhiteBoard.WbServerImpl.WbServerImpl

(

String[]

args

)

throws Exception

Definition at line 29 of file WbServerImpl.java.

References WhiteBoard.WbServerImpl.myURL, and WhiteBoard.WbServerImpl.vBoards.

Referenced by WhiteBoard.WbServerImpl.main().

                                                         {
    // args = [serverID, serverMcnm]
    vBoards = new Vector <ABoard> ();
    myURL = Invoke.makeURL('S', args[0]);
    Naming.rebind(myURL, this); // rmi register ourselves
    Invoke.myPrint("WbServerImpl", myURL + " started");
    }

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Member Function Documentation

void WhiteBoard.WbServerImpl.addClient	(	WbClient	wc,
		String	brdnm
	)		throws java.rmi.RemoteException

Implements WhiteBoard.WbServer.

Definition at line 72 of file WbServerImpl.java.

References WhiteBoard.WbServerImpl.findAboard(), and WhiteBoard.WbServerImpl.sendAllLines().

                                       {
    ABoard ab = findAboard(brdnm);
    if (ab == null) {
        ab = new ABoard(brdnm);
        vBoards.addElement(ab);
    } else {
        sendAllLines(wc, ab); // new client on an old board
    }
    ab.vClients.addElement(wc);
    }

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void WhiteBoard.WbServerImpl.addLine	(	LineCoords	ln,
		String	brdnm
	)		throws java.rmi.RemoteException

Implements WhiteBoard.WbServer.

Definition at line 98 of file WbServerImpl.java.

References WhiteBoard.WbServerImpl.findAboard().

                                       {
    ABoard ab = findAboard(brdnm);
    if (ab == null) return;

    ab.vLines.addElement(ln);

    // Broadcast to all the clients on this board
    for (Enumeration e = ab.vClients.elements(); e.hasMoreElements();) {
        WbClient wc = (WbClient) e.nextElement();
        try {wc.updateBoard(ln);}
        catch (Exception x) {x.printStackTrace();}
    }  
    }

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void WhiteBoard.WbServerImpl.delClient	(	WbClient	wc,
		String	brdnm
	)		throws java.rmi.RemoteException

Implements WhiteBoard.WbServer.

Definition at line 84 of file WbServerImpl.java.

References WhiteBoard.WbServerImpl.findAboard(), WhiteBoard.WbServerImpl.pleaseDie(), and WhiteBoard.WbServerImpl.vBoards.

                                       {
    ABoard ab = findAboard(brdnm);
    if (ab == null) return;
         
    ab.vClients.removeElement(wc);

    // If this is the last client in board, delete board  
    if (ab.vClients.size() == 0) vBoards.removeElement(ab);

    // If this was the last board, terminate this server
    if (vBoards.size() == 0) pleaseDie();
    }

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ABoard WhiteBoard.WbServerImpl.findAboard ( String  brdnm )

private

Definition at line 50 of file WbServerImpl.java.

References WhiteBoard.WbServerImpl.vBoards.

Referenced by WhiteBoard.WbServerImpl.addClient(), WhiteBoard.WbServerImpl.addLine(), WhiteBoard.WbServerImpl.delClient(), and WhiteBoard.WbServerImpl.sendAllLines().

                                            {
    for (Enumeration e = vBoards.elements(); e.hasMoreElements();) {
        ABoard b = (ABoard) e.nextElement();
        if (brdnm.equals(b.boardName))
        return b;
    }
    return null;
    }

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static void WhiteBoard.WbServerImpl.main ( String  args[] )

static

Definition at line 113 of file WbServerImpl.java.

References WhiteBoard.WbServerImpl.WbServerImpl().

                                           {
    try { WbServerImpl wsi = new WbServerImpl(args);}
    catch (Exception e) {e.printStackTrace();}
    }

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void WhiteBoard.WbServerImpl.pleaseDie ( )

private

Definition at line 37 of file WbServerImpl.java.

References WhiteBoard.WbServerImpl.myURL.

Referenced by WhiteBoard.WbServerImpl.delClient().

                             {
    int delay = 5000;   // in msec, delayed death
    Timer timer = new Timer();
    timer.schedule( new TimerTask(){
        public void run() {
            try {Naming.unbind(myURL);}
            catch (Exception e) {e.printStackTrace();}
            Invoke.myPrint("WbServerImpl", myURL + " exits");
            System.exit(0);
        }
        }, delay);
    }

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void WhiteBoard.WbServerImpl.sendAllLines	(	WbClient	wc,
		String	brdnm
	)		throws java.rmi.RemoteException

Implements WhiteBoard.WbServer.

Definition at line 59 of file WbServerImpl.java.

References WhiteBoard.WbServerImpl.findAboard().

Referenced by WhiteBoard.WbServerImpl.addClient().

                                       {
    ABoard ab = findAboard(brdnm);
    sendAllLines(wc, ab);
    }

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void WhiteBoard.WbServerImpl.sendAllLines ( WbClient  wc, ABoard  ab  )

private

Definition at line 65 of file WbServerImpl.java.

                                                      {
    for (Enumeration e = ab.vLines.elements(); e.hasMoreElements(); ) {
        try {wc.updateBoard((LineCoords) e.nextElement());}
        catch (Exception x) {x.printStackTrace();}
    }
    }

Member Data Documentation

String WhiteBoard.WbServerImpl.myURL

private

Definition at line 27 of file WbServerImpl.java.

Referenced by WhiteBoard.WbServerImpl.pleaseDie(), and WhiteBoard.WbServerImpl.WbServerImpl().

Vector<ABoard> WhiteBoard.WbServerImpl.vBoards

private

Definition at line 26 of file WbServerImpl.java.

Referenced by WhiteBoard.WbServerImpl.delClient(), WhiteBoard.WbServerImpl.findAboard(), and WhiteBoard.WbServerImpl.WbServerImpl().

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The documentation for this class was generated from the following file:

• WbServerImpl.java