final CountDownLatch messageLatch = new CountDownLatch(1);
final CountDownLatch onOpenLatch = new CountDownLatch(1);
try {
final ClientManager client = createClient();
Session session = client.connectToServer(new Endpoint() {
@Override
public void onOpen(Session session, EndpointConfig EndpointConfig) {
session.addMessageHandler(new MessageHandler.Whole<String>() {
@Override
public void onMessage(String message) {