On 06/10/2007, at 1:13 AM, Eric Lazarus wrote:
I could use bean shell scripts. I could use the java version of python, I suppose. I was hoping that there is a biz rule language that I could use and that, ideally, someone has seen work well with Cayenne objects. Ideally I would like something open source/free and/or very cheap. We have budget constraints.
I have a very similar requirement for which I was researching options recently. Some things I found were:
http://www.jessrules.com/jess http://www.manageability.org/blog/stuff/rule_engines/viewNothing Cayenne specific. Also, I'd add Jira to that list as an example to look at (which I think is based on the OfBiz engine). It contains a quite nice workflow concept.
In our application we have developed a concept of 'saved find'. This is essentially a serialised form of a Cayenne query expression. You could use EJBQL (http://cayenne.apache.org/doc/ejbqlquery.html) but we chose to do it slightly differently since we don't want users to write the queries by hand but instead create them in a GUI (which looks a bit like many email applications' rules editor).
If you think there is any potential to collaborate on this, please contact me off list. I'm happy to share what we've got so far. My requirements are for a reasonably simple GUI based rule designer rather than an infinitely flexible XML or language based approach.
Cheers Ari Maniatis --------------------------> Aristedes Maniatis phone +61 2 9660 9700 PGP fingerprint 08 57 20 4B 80 69 59 E2 A9 BF 2D 48 C2 20 0C C8
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