/**
* Sends a leave message to the multicast group and leaves it. The <CODE>DiscoveryResponder</CODE>
* leaves its multicast group. This method has no effect if the <CODE>DiscoveryResponder</CODE> is
* <CODE>OFFLINE</CODE> or <CODE>STOPPING</CODE> or <CODE>STARTING</CODE>.
*/
public void stop() {
if (state == ONLINE) {
changeState(STOPPING);
// ------------------------
// Stop corresponding thread
// ------------------------
responder.stopRequested = true;
synchronized (responder.interrupted) {
if (!responder.interrupted.booleanValue()) {
responderThread.interrupt();
}
}
// Fix for cases when the interrupt does not work (Windows NT)
try {
MulticastSocket ms = new MulticastSocket(multicastPort);
// NPCTE fix for bugId 4499338, esc 0, 04 Sept 2001
if (usrInet != null) {
ms.setInterface(usrInet);
if (logger.finerOn()) {
logger.finer("stop ", "use the interface " + usrInet);
}
}
// end of NPCTE fix for bugId 4499338
InetAddress group = InetAddress.getByName(multicastGroup);
ms.joinGroup(group);
ms.send(new DatagramPacket(new byte[1], 1, group, multicastPort));
ms.leaveGroup(group);
} catch (Exception e) {
if (logger.finerOn()) {
logger.finer(
"stop ",
"Unexpected exception occurred trying to send empty message " + e.getMessage());
}
}
// ------------------------
// free 'remained' allocated resource
// ------------------------
responder = null;
System.runFinalization();
// ----------------
// Update state
// ----------------
// changeState(OFFLINE) ;
} else {
if (logger.finerOn()) {
logger.finer("stop ", "Responder is not ONLINE");
}
}
}
