@Override
            public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain) throws IOException, ServletException {
                request.setAttribute(Globals.ASYNC_SUPPORTED_ATTR, true);
                chain.doFilter(request, response);
            }
This is {@link CasEmbeddedContainerTomcatFiltersConfiguration}.

@author Misagh Moayyed
@since 5.0.0
webapp/cas-server-webapp-init-tomcat/src/main/java/org/apereo/cas/config/CasEmbeddedContainerTomcatFiltersConfiguration.java