@Override
protected List<RequestHandler> createRequestHandlers()
    throws ServiceException {
    List<RequestHandler> handlers = super.createRequestHandlers();
    handlers.add(0, new VertxBootstrapHandler());
    handlers.add(new ServletUIInitHandler());
    return handlers;
}
 

@Override
public void sessionInit(SessionInitEvent event) throws ServiceException {
  event.getSession().addUIProvider(provider);
}