Hello Justin:

Whew. :) I certainly don't plan to re-implement Twisted, since it already exists and it's ace; I want something at a higher level. My aim here is to make my existing application(s) even more modular so that functionality can be added and extended in a simple, common way. This principle has already provided excellent benefits in the past.

A good book on Event management is David Luckham's "The Power of Events: An Introduction to Complex Event Processing in Distributed Enterprise Systems." I think the higher level stuff revolves around the event pattern language (also known as the trigger language)- how one defines an event and the mechanisms for detecting events. I am developing a WS-BPEL processor. Not many people know about WS-BPEL. WS-BPEL is a language that has event handlers that are based on time and web service calls. To correctly implement the specification, I also have to deal with triggering activities based on patterns in a message or attributes of the SOAP header. My experiences so far.... For time based stuff, Twisted is pretty strong (in opposition - Stackless is weak). I use TaskLoopCall help implement time and alarm triggered stuff. For web services, I have been writing classes that represent end-point-references based on the WSA standard. For instance, a tasklet in my WS-BPEL processor tells (or subscribes to) my "event manager" that it is interested in a particular EPR (say a SOAP message with a "buy" operation). In turn, a scheduler suspends the tasklet. When my Twisted based Request Handler receives a http request, as a part of the response, the handler creates an EPR representing the client end and sends it to the event manager. If the "event manager" can match the incoming EPR, it will ask the scheduler to wake up the associated tasklet. So far, this works fairly well. For 80% of stuff, Twisted and Stackless work really well together. My EPR classes are still pretty rough. However in a month or two, they should be in better shape. I am not sure if anyone is really interested but I would be more than happy to put it out there. Cheers, Andrew __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com