Java How to Program Fourth Edition - DCC

1028 Networking Chapter 17
39 new ReceivingThread( this, clientSocket ).start();
40
41 // print connection information
42 System.out.println( "Connection received from: " +
43 clientSocket.getInetAddress() );
44
45 } // end while
46
47 } // end try
48
49 // handle exception creating server and connecting clients
50 catch ( IOException ioException ) {
51 ioException.printStackTrace();
52 }
53
54 } // end method startServer
55
56 // when new message is received, broadcast message to clients
57 public void messageReceived( String from, String message )
58 {
59 // create String containing entire message
60 String completeMessage = from + MESSAGE_SEPARATOR + message;
61
62 // create and start MulticastSendingThread to broadcast
63 // new messages to all clients
64 new MulticastSendingThread(
65 completeMessage.getBytes() ).start();
66 }
67
68 // start the server
69 public static void main ( String args[] )
70 {
71 new DeitelMessengerServer().startServer();
72 }
73 }
Server listening on port 5000 ...
Connection received from: SEANSANTRY/XXX.XXX.XXX.XXX
Connection received from: PJD/XXX.XXX.XXX.XXX
Fig. Fig. 17.11 17.11 DeitelMessengerServer application for managing a chat room
(part 2 of 2).
Lines 32–45 listen continuously for new client connections. Line 35 invokes method
accept of class ServerSocket to wait for and accept a new client connection. Line 39
creates and starts a new ReceivingThread for the client. Class ReceivingThread
(Fig. 17.14) is a Thread subclass that listens for new incoming messages from a particular
client. The first argument to the ReceivingThread constructor is a Message-
Listener (Fig. 17.13), to which messages from the client should be delivered. Class
DeitelMessengerServer implements interface MessageListener (line 15) and
therefore can pass the this reference to the ReceivingThread constructor.