[undertow-dev] Notifications from proxy

Hi, I'm trying to use embedded Undertow as a proxy in front of some REST services. I can get it all working, but I'm not getting enough information from the proxy, specifically I'd like some way to know: * When the proxy client tries to connect to an internal endpoint. * When the proxy client fails to connect to an internal endpoint. * The details (definitely headers, but possibly also body) going to the internal endpoint. * The details (definitely headers, but possibly also body) coming from the internal endpoint. At the moment I can't see any easily hookable way to get notifications about these things. I've copied and hacked the LoadBalancingProxyClient so I can add hooks to discover the internal endpoints and failures, but it looks like I'd have to duplicate quite a bit more to get hold of the details of the messages going to/from the internal endpoint. Have I missed anything? Is there a nice hook that will give me access to the exchange at these points? Thanks Jim