@Override
public Session connectToServer(final Endpoint endpointInstance, final ClientEndpointConfig cec, final URI path) throws DeploymentException, IOException {
//in theory we should not be able to connect until the deployment is complete, but the definition of when a deployment is complete is a bit nebulous.
WebSocketClientNegotiation clientNegotiation = new ClientNegotiation(cec.getPreferredSubprotocols(), toExtensionList(cec.getExtensions()), cec);
IoFuture<WebSocketChannel> session = WebSocketClient.connect(xnioWorker, bufferPool, OptionMap.EMPTY, path, WebSocketVersion.V13, clientNegotiation);
WebSocketChannel channel = session.get();
EndpointSessionHandler sessionHandler = new EndpointSessionHandler(this);
final List<Extension> extensions = new ArrayList<Extension>();
final Map<String, Extension> extMap = new HashMap<String, Extension>();
for(Extension ext : cec.getExtensions()) {
extMap.put(ext.getName(), ext);
}
for(WebSocketExtension e : clientNegotiation.getSelectedExtensions()) {
Extension ext = extMap.get(e.getName());
if(ext == null) {
throw JsrWebSocketMessages.MESSAGES.extensionWasNotPresentInClientHandshake(e.getName(), clientNegotiation.getSupportedExtensions());
}
extensions.add(ExtensionImpl.create(e));
}
EncodingFactory encodingFactory = EncodingFactory.createFactory(classIntrospecter, cec.getDecoders(), cec.getEncoders());
UndertowSession undertowSession = new UndertowSession(channel, path, Collections.<String, String>emptyMap(), Collections.<String, List<String>>emptyMap(), sessionHandler, null, new ImmediateInstanceHandle<Endpoint>(endpointInstance), cec, path.getQuery(), encodingFactory.createEncoding(cec), new HashSet<Session>(), clientNegotiation.getSelectedSubProtocol(), extensions);
endpointInstance.onOpen(undertowSession, cec);
channel.resumeReceives();
return undertowSession;
}