Ovidiu Predescu wrote: >Hi, > >Over the past two weeks I've completely overhauled the control flow >layer in Cocoon. Prompted by Jason's pointer to JavaScript's ability >to save its state, I've contacted Christopher Oliver, the original >author of that work. We was very kind and did an amazing work in >taking his original work and evolving it to implement continuations >a-la Scheme in JavaScript! Thank you very much for this work, >Christopher! > >Because of his work, I've decided to drop my initial, Scheme only, >implementation of the control flow layer for Cocoon. This code relied >on an implementation of the sitemap which was coded entirely in >Scheme. This made it harder for hooking up control flow engines >implemented in different languages with first class continuations >support. It also required me to spend quite some time to re-implement >the full semantic of the sitemap in Scheme, which was not my original >intent. > >The current approach abstracts out the interpreted language, and the >corresponding interpreter for the control flow. It also makes use of >Sylvain's excellent interpreted sitemap engine. This implementation >simply extends the semantics of the current Cocoon sitemap with two >new features: the ability to specify script files containing control >flow code, and the ability to invoke functions in such a control flow >script. > >The current work focuses exclusively on the support for JavaScript, >but in the very near future it will have support for Scheme. All the >code is checked in the scratchpad area in the schecoon/ directory, so >you can check it out and comment on it. > >I still have to write an example and documentation for the new >feature, and how it is supposed to fit within the current Cocoon. But >I think at this time the current code is fairly complete, and it can >be used to implement some test applications. There are some issues >though; I'll talk about them in a later email. > >This is the status of the work as of today. I'll be off to JavaOne for >the next week, and I'll be checking email now and then. However don't >expect long replies or anything substantial from me in this time, as >I'll probably be busy during the day, and perhaps during the night as >well (looks like parties and BOFs are every day ;-). > >Best regards, > Great work, and thank again to Christopher for his work, which will make the flow layer accessible to almost every web developper out there !
I'd like also to give you an update of my part of the work, which is implement "internal redirects" in Cocoon (e.g. redirect to "cocoon://my-page.html"), to allow the flow engine to send a page back using the existing features of the sitemap. I digged all the related class and finally would where to hook it up cleanly : in the Redirector. It should be ready next week, so Ovidiu can integrate it when coming back from JavaOne. Christopher, is your work part of the official Rhino code base ? And if not, is there a chance it can make its way inside it ? Sylvain -- Sylvain Wallez Anyware Technologies Apache Cocoon http://www.anyware-tech.com mailto:[EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
