@Override
        public void configureWebSocketTransport(final WebSocketTransportRegistration registration) {
            registration.addDecoratorFactory(new WebSocketHandlerDecoratorFactory() {
                @Override
                public WebSocketHandler decorate(final WebSocketHandler handler) {
                    WebSocketHandlerDecorator w = new WebSocketHandlerDecorator(handler) {


                        @Override
                        public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
                            session.close(CloseStatus.NOT_ACCEPTABLE);
                            super.handleMessage(session, message);
                        }

                        @Override
                        public void afterConnectionEstablished(final WebSocketSession session) throws Exception {
                            super.afterConnectionEstablished(session);
                        }
                    };



                    return w;
                }
            });
        }