CallbackHelperFactory.attach(container);
TaskDispatcherFactory.attach(container);
// Make some changes to the ServletContext so {@link DwrWebContextFilter}
// can find the Container etc.
WebContextBuilder webContextBuilder = container.getBean(WebContextBuilder.class);
ServletContext servletContext = servletConfig.getServletContext();
servletContext.setAttribute(Container.class.getName(), container);
servletContext.setAttribute(WebContextBuilder.class.getName(), webContextBuilder);
servletContext.setAttribute(ServletConfig.class.getName(), servletConfig);