[rules-users] Drools Community Clinic Feb 4th 5PM GMT

[David Sinclair]

here is the documentation

http://downloads.jboss.com/drools/docs/4.0.4.17825.GA/html_single/index.html#d0e2978

On Fri, Jan 23, 2009 at 12:50 PM, Dan Seaver <dan.seaver at ge.com> wrote:

>
> Sounds like a very good idea. If you go forward with this, I'd love to see
> your method for solving the following type of problem:
>
> I need to update a particular object without causing the rule to re-fire.
>
> Say I have two classes, Stack and Board. I need to choose the Stack to put
> each Board, so one of these sorting rulles would look like this:
>
> when
>   board : Board (thickness == 1)
>   stack : Stack (location == "A")
> then
>   board.setStack(stack);
>   update(board);
> end
>
> The problem is the update statement puts the rule back in the Agenda to be
> fired again, thus an infinite loop. My solution in general has been to use
> a
> Collection to track boards that have been processed, but it seems to be
> alot
> of overhead. I'm not pleased by my solution.
>
> when
>   board : Board (thickness == 1)
>   stack : Stack (location == "A")
>   processed : NamedCollection(name == "BoardsSorted", collection not
> contains board)
> then
>   board.setStack(stack);
>   update(board);
>   processed.add(board);
>   update(processed);
> end
>
> Also, the NamedCollection needs to be created, which I'm doing within the
> ruleset, which adds a somewhat meaningless to Business Analysts rule.
> Though
> I could create the NamedCollection in Java and add it to WorkingMemory
> prior
> to firing the rules, I'd like the rulesets to take care of themselves.
>
> My actual problem set is laced with many solutions that need to update
> objects. Even if the object is not directly related to the rule criteria, a
> map to the object needs to be created in the RHS so the LHS has a reference
> to the object being updated, thus posing the same problem as above.
>
> Your insights would be greatly appreciated.
>
>
> Mark Proctor wrote:
> >
> > I'm going to try an informal experiment for the 4th of February at 5PM
> > GMT (Date/Time subject to change), we will run an online Drools Clinic
> > in the form of a Webinar. So the idea here isn't of a 60 minute
> > presentation, but really more of a 60 minute interactive Q&A where we
> > will use the desktop to assist in some explanations talking through code
> > or examples. What do people think?
> >
> > Ideally we would have a set of pre-determined questions, with some adhoc
> > ones on the day too. Feel free to start listing your Qs here. I want to
> > avoid "What's  WorkingMemory" type questions, but other than that,
> > anything is game. Also if anyone has anything cool they would like to
> > discuss about how they have used Drools, or just general interesting AI
> > ideas, then that's fine too - happy for this just to turn into a fun
> > geek chat too.
> >
> > Mark
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/Drools-Community-Clinic-Feb-4th-5PM-GMT-tp21623144p21629458.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
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