Re: [rules-users] Inheritance-Like Design Question

To add constraints to a fact matched by the parent rule, use "from" : rule "parent" when $var : MyFact( ... ) then end rule "child" extends "parent" when MyFact(...) from $var then end Regarding your other question, Drools allows you to automatically disable/enable parent rule, cancel rules in a rule group after another rule fires, etc. but what you want to do is not available declaratively. You will need to add constraints for that in a similar way to Pavel's suggestion. []s Edson 2010/3/9 Moe Alkhafaji <moe.alkhafaji(a)medcpu.com&gt; > Thanks Pavel. I was hoping for more of a transparent functionality > supported by Drools than have my users add those control method calls. I am > trying to make their rules as "control logic" blind as possible. But, I > guess they would have to do that. > > > Also, any idea on re-using an object from the parent rule? What is the > syntax for using an object declared in the parent rule? Thanks. > > > On Tue, Mar 9, 2010 at 11:25 AM, Pavel Tavoda <pavel.tavoda(a)gmail.com&gt;wrote: > >> Aha, misunderstanding. Yes you can't use activation group if you want >> execute more children rules. However you can use fact (Status) to >> avoid evaluating parent rule. My suggestion: >> >> Rule DEFAULT >> salience -100 >> if A and ! Status(done) then DEFAULT end >> >> Rule A >> if A and B then SOMETHINGB; update(Status(done)) end >> >> Rule B >> if A or B then SOMETHINGB; update(Status(done)) end >> >> Rule C >> if A or C then SOMETHINGC; update(Status(done)) end >> >> At beginning insert Status with e.g. "ready". It's possible to use >> instead of update also insert but because you can fire more children >> rules it will be waste of memory. >> >> Hope this help >> >> Pavel >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > > > -- > Moe Alkhafaji > Chief Technology Officer, MedCPU > Phone: (630) 290-1113 > Email: cto(a)medcpu.com > > This message contains information which may be confidential. Unless you > are the addressee, you may not use, copy or disclose to anyone the message > or any information contained in this message. If you have received this > email in error, please notify cto(a)medcpu.com and please delete the > message immediately. In order for the contents of this message to be binding > on behalf of MedCPU it must be confirmed in writing by an authorized > signatory of MedCPU. Our company accepts no liability for the content of > this email unless it is so confirmed. The views or opinions presented herein > do not necessarily represent those of the company. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users