[jetty-users] Null HttpChannel.getCurrentHttpChannel() in ServletHandler

[Matt Deimel <mdeimel@xxxxxxxxx>]

I'm attempting to make SiteMesh3 an asynchronous filter so that it will work with Jetty's asynchronous ProxyServlet.Transparent proxy. Everything appears to work until the SiteMesh filter hands off to Jetty - specifically in ServletHandler.doFilter(). The NullPointerException happens on the first line of that method (line 1628 for jetty-proxy 9.2.1.v20140609). When I debug into it I see that the request is *not* an instance of Request, and HttpChannel.getCurrentHttpChannel() is null, which is why it throws a NPE when trying to call getRequest(). 

My question is this - is there any way for me to initialize or setup HttpChannel, or is that completely outside of what I should be doing when I use the Jetty proxy? Thanks so much for your help. 

        @Override
        public void doFilter(ServletRequest request, ServletResponse response)
            throws IOException, ServletException
        {
            final Request baseRequest=(request instanceof Request)?((Request)request):HttpChannel.getCurrentHttpChannel().getRequest();