Hi all,
I have written a chat server with java.nio classes and I'd like to launch
it with JBoss as a service.
So I created a wrapper on it with a ServiceMBean which simply instantiates the
chat server.
public class ChatService extends ServiceMBeanSupport implements ChatServiceMBean
| {
|
|
| // The lifecycle
| protected void startService() throws Exception
| {
| new NbChatServer(9999);
|
| }
| .......
| }
The NbChatServer is a standard java.nio Server which listens for incoming
messages:
public NbChatServer( int port ) {
|
| this.port = port;
|
| new Thread( this ).start();
|
| }
|
| public void run() {
| try {
|
| ServerSocketChannel ssc = ServerSocketChannel.open();
|
| // Set it to non-blocking, so we can use select
| ssc.configureBlocking( false );
|
| // Get the Socket connected to this channel, and bind it
| // to the listening port
| ServerSocket ss = ssc.socket();
| InetSocketAddress isa = new InetSocketAddress( port );
| ss.bind( isa );
|
| // Create a new Selector for selecting
| Selector selector = Selector.open();
|
| // Register the ServerSocketChannel, so we can
| // listen for incoming connections
| ssc.register( selector, SelectionKey.OP_ACCEPT );
|
| System.out.println( "Server started on port "+port );
|
| while (true) {
| // See if we've had any activity -- either
| // an incoming connection, or incoming data on an
| // existing connection
|
|
| int num = selector.select();
| // EXECUTION HANGS HERE!!!
|
| // If we don't have any activity, loop around and wait
| // again
| if (num == 0) {
| continue;
| }
|
|
| Set keys = selector.selectedKeys();
| Iterator it = keys.iterator();
|
| .......
As you can see from the comments executions hangs after
int num = selector.select();
but launched as a plain Java applications it doesn't stops there........
why is it such when it's launched from a ServiceMBean ?
Anyway I can see that the port stays busy as if the server is up but it doesn't
receive any messages.......
is it forbidden to use java.nio api from a ServiceMBean ?
Hope I can get help........
Thanks & regards
Francesco
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