/** * Closes the socket and stops the listener thread. * * @throws IOException */ public void close() throws IOException { boolean interrupted = false; WorkerTask l = listener; if (l != null) { l.terminate(); l.interrupt(); if (socketTimeout > 0) { try { l.join(); } catch (InterruptedException ex) { interrupted = true; logger.warn(ex); } } listener = null; } DatagramSocket closingSocket = socket; if ((closingSocket != null) && (!closingSocket.isClosed())) { closingSocket.close(); } socket = null; if (interrupted) { Thread.currentThread().interrupt(); } }