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ChatServer.java

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import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.InetSocketAddress;

import java.net.UnknownHostException;

import java.util.Set;

import org.java_websocket.WebSocket;

import org.java_websocket.handshake.ClientHandshake;

import org.java_websocket.server.WebSocketServer;

/**

* A simple WebSocketServer implementation. Keeps track of a "chatroom".

*/

public class ChatServer extends WebSocketServer {

public ChatServer( int port ) throws UnknownHostException {

super( new InetSocketAddress( port ) );

}

public ChatServer( InetSocketAddress address ) {

super( address );

}

@Override

public void onOpen( WebSocket conn, ClientHandshake handshake ) {

this.sendToAll( "new connection: " + handshake.getResourceDescriptor() );

System.out.println( conn + " entered the room!" );

}

@Override

public void onClose( WebSocket conn, int code, String reason, boolean remote ) {

this.sendToAll( conn + " has left the room!" );

System.out.println( conn + " has left the room!" );

}

@Override

public void onMessage( WebSocket conn, String message ) {

this.sendToAll( message );

System.out.println( conn + ": " + message );

}

public static void main( String[] args ) throws InterruptedException , IOException {

WebSocket.DEBUG = true;

int port = 8887; // 843 flash policy port

try {

port = Integer.parseInt( args[ 0 ] );

} catch ( Exception ex ) {

}

ChatServer s = new ChatServer( port );

s.start();

System.out.println( "ChatServer started on port: " + s.getPort() );

BufferedReader sysin = new BufferedReader( new InputStreamReader( System.in ) );

while ( true ) {

String in = sysin.readLine();

s.sendToAll( in );

}

}

@Override

public void onError( WebSocket conn, Exception ex ) {

ex.printStackTrace();

}

/**

* Sends <var>text</var> to all currently connected WebSocket clients.

*

* @param text

* The String to send across the network.

* @throws InterruptedException

* When socket related I/O errors occur.

*/

public void sendToAll( String text ) {

Set<WebSocket> con = connections();

synchronized ( con ) {

for( WebSocket c : con ) {

c.send( text );

}

}

}

}