A custom client endpoint config and its usage

CustomClientEndpointConfig.txt

WebSocketContainer webSocketContainer = ContainerProvider.getWebSocketContainer();
ClientEndpointConfig config = ClientEndpointConfig.Builder.create().decoders(StockTickDecoder.class).build();
Session session = webSocketContainer.connectToServer(StockTickerClient().class, config, 
                                                    new URI("ws://hotstocks.com/ticker"));