/**
* Starts the listener thread that accepts incoming messages. The thread is started in daemon mode
* and thus it will not block application terminated. Nevertheless, the {@link #close()} method
* should be called to stop the listen thread gracefully and free associated ressources.
*
* @throws IOException
*/
public synchronized void listen() throws IOException {
if (listener != null) {
throw new SocketException("Port already listening");
}
ensureSocket();
listenerThread = new ListenThread();
listener =
SNMP4JSettings.getThreadFactory()
.createWorkerThread("DefaultUDPTransportMapping_" + getAddress(), listenerThread, true);
listener.run();
}
