Simple multi-threaded chat server with GUI. More...

Inheritance diagram for ChatServerFrame:

Collaboration diagram for ChatServerFrame:

Public Member Functions
	ChatServerFrame (String args[])
	Creates a new instance of the `ChatClientFrame`.
void	logMessage (String str)
	Logs message in log area.
void	logStatus (String str)
	Updates status message by setting window title.
Static Public Member Functions
static void	main (String args[])
	Main entry point.
Static Private Member Functions
static String	now ()
	Gets current time stamp.
Private Attributes
int	port = 2000
	TCP port that chat server listens for new connections.
JTextArea	logArea
Static Private Attributes
static final long	serialVersionUID = 7408497530711923022L
	Implements java.io.Serializable interface.

Detailed Description

Simple multi-threaded chat server with GUI.

Author:: Mikica B Kocic

Definition at line 20 of file ChatServerFrame.java.

Constructor & Destructor Documentation

ChatServerFrame.ChatServerFrame ( String args[] )

Creates a new instance of the ChatClientFrame.

Parameters:

args	the command line arguments passed to main

Definition at line 41 of file ChatServerFrame.java.

References logArea, and port.

Referenced by main().

    {
        super( "IP1-4.1.2: Yet Another Simple Chat Server" );
        
        setDefaultCloseOperation( WindowConstants.EXIT_ON_CLOSE );

        //////////////////////////////////////////////////////////////////////////////////
        
        /* Top level components
         */
        Font textFont = new Font( Font.MONOSPACED, Font.PLAIN, 14 );
        
        logArea = new JTextArea ();
        logArea.setFont( textFont );
        logArea.setBackground( new Color( 0, 0, 128 ) );
        logArea.setForeground( new Color( 220, 220, 192 ) );
        logArea.setLineWrap( true );
        logArea.setWrapStyleWord( true );
        logArea.setEditable( false );
        
        JScrollPane logPane = new JScrollPane ();
        logPane.setViewportView( logArea );

        add( logPane, BorderLayout.CENTER );
        
        /* Adjust window dimensions not to exceed screen dimensions ...
         */
        Dimension win = new Dimension( 1024, 600 );
        Dimension scsz = Toolkit.getDefaultToolkit().getScreenSize();
        win.width  = Math.min( win.width, scsz.width );
        win.height = Math.min( win.height, scsz.height - 40 );
        setSize( win );
        
        /* ... then center window on the screen.
         */
        setLocation( ( scsz.width - win.width )/2, ( scsz.height - 40 - win.height )/2 );
        
        /* Parse arguments: [ <port> ]
         */
        if ( args.length >= 1 ) {
            try {
                port = Integer.parseInt( args[ 0 ] );
            } catch ( NumberFormatException e ) {
                // TODO might report that we are using default port?
            }
        }
        
        /* Start receiving connections
         */
        ChatServer server = new ChatServer( port, this );
        server.start();
    }

Member Function Documentation

void ChatServerFrame.logMessage ( String str ) [virtual]

Logs message in log area.

Parameters:

str	actual message

Implements ChatServer.Context.

Definition at line 112 of file ChatServerFrame.java.

References logArea, and now().

    {
        synchronized( logArea )
        {
            logArea.append( now () + "  " + str + "\n" );
            logArea.setRows( logArea.getRows () + 1 );
            logArea.setCaretPosition( logArea.getText().length () );
        }
    }

void ChatServerFrame.logStatus ( String str ) [virtual]

Updates status message by setting window title.

Parameters:

str	new status message

Implements ChatServer.Context.

Definition at line 128 of file ChatServerFrame.java.

References logArea.

    {
        setTitle( "IP1-4.1.2 Chat Server " + str );

        /* Change background color to dark red if the socket is dead.
         */
        if ( str.contains( ", dead") ) {
            logArea.setBackground( new Color( 92, 0, 0 ) );
        }
    }

static void ChatServerFrame.main ( String args[] ) [static]

Main entry point.

Parameters:

args	the command line arguments

Definition at line 144 of file ChatServerFrame.java.

References ChatServerFrame().

    {
        final String[] copyOfArgs = args;
        
        java.awt.EventQueue.invokeLater( 
                new Runnable() {
                    public void run() {
                        new ChatServerFrame( copyOfArgs ).setVisible( true );
                    }
                }
            );
    }

static String ChatServerFrame.now ( ) [static, private]

Gets current time stamp.

Returns:: time in ISO format

Definition at line 99 of file ChatServerFrame.java.

Referenced by logMessage().

    {
        Calendar cal = Calendar.getInstance ();
        SimpleDateFormat sdf = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" );
        return sdf.format( cal.getTime() );
    }