@Override
public ListenableFuture<WebSocketSession> doHandshakeInternal(WebSocketHandler wsHandler,
HttpHeaders headers, final URI uri, List<String> protocols,
List<WebSocketExtension> extensions, Map<String, Object> attributes) {
final ClientUpgradeRequest request = new ClientUpgradeRequest();
request.setSubProtocols(protocols);
for (WebSocketExtension e : extensions) {
request.addExtensions(new WebSocketToJettyExtensionConfigAdapter(e));
}
for (String header : headers.keySet()) {
request.setHeader(header, headers.get(header));
}
Principal user = getUser();
final JettyWebSocketSession wsSession = new JettyWebSocketSession(attributes, user);
final JettyWebSocketHandlerAdapter listener = new JettyWebSocketHandlerAdapter(wsHandler, wsSession);