May I suggest you take a look at Tohu?
http://community.jboss.org/wiki/Tohu
It is a small framework to do, it seems, exactly what you
described. It is built on top of Drools, but even if you prefer to
write your own framework on top of Jess, it can probably give you
ideas for your own
Thank's Edson. Will check it out.
Drools seems to have come a long compared to when I last looked at it -
given that you have a foot in both camps, any wisdom and guidance would much
appreciated. My bias is towards Jess, perhaps since I got introduced to
rules engines with the excellent Jess book