Hi Ben, Yes, tapestry-cometd is my creation… have you actually given it a go? Is there something you need it to do that it can't? I'm interested to hear your use case and if there's something that tapestry-cometd can't do, I can help you out.
I'll give you a bit of a history lesson on how it evolved… As a previous committer to DWR, I initially started out integrating tapestry with DWR's reverse ajax. After speaking with DWR's lead developer, he informed me that DWR's push was not bullet proof and that he himself preferred cometd. So, I switched to cometd. I then found that cometd didn't work on some older servlet containers but that Atmosphere has cometd integration. So, I switched to atmosphere-cometd. So, tapestry-cometd currently sits on top of the AtmosphereServlet. One of the things that I dislike about CometD is that there is no "core" javascript implementation. Instead, you must either choose the jQuery or Dojo client libraries. I chose jquery and tapestry-cometd actually requires tapestry-jquery (I hate this!). If I had my time again, I would probably have written a straight tapestry-atmosphere integration. This seems to be the way forward since there is a core javascript implementation which does not require jquery / dojo or another "foundation" framework. It seems that most of the other java web frameworks out there have atmosphere integration so I think it's a safe bet. That being said, a rewrite on top of atmosphere would act in a very similar way to tapestry-cometd. 1. Put a PushTarget on a page 2. Give it a "topic" and an "event" 3. Publish a message to the "topic" 4. Return a "block" from the event (or execute some javascript) 5. Push the result to the PushTarget Howard has hinted that he'd like to add push to tapestry but I haven't heard much lately. I've recently become a tapestry committer and I may even provide this module myself in the fuure. As with the other tapestry comitters, I have a day job and a social life to juggle with contributing to open source. For the moment your options are to use tapestry-cometd or to use tapestry and atmosphere side by side.
