Re: [rules-users] execute particular rules programmatically and dynamically

Agreed, But if you really do want to you can setup an agenda filter so that only the activation for the rule you care about is fired - but I don't think there are many valid cases where this is needed/desirable/appropriate. Thomas From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Michael Anstis Sent: 31 March 2011 10:08 To: Rules Users List Subject: Re: [rules-users] execute particular rules programmatically and dynamically Why would you want to execute a single rule? The logic you'd write to determine which rule to fire should itself be part of the rules: So, for example, if you want to validate facts of type "Smurf" then write a rule that matches on "Smurf". When you insert a "Smurf" only the rules that match on this will become candidates for execution when you call fireAllRules. Perhaps use of a stateless session would simplify things so you need not worry about other facts in WM "polluting" the results you expect to see? More and more questions are posted here asking how to make individual rules execute; IMO the solution is to change your thinking about how Rules Engines work. If you give your use-case we might be able to advise a better approach. With kind regards, Mike 2011/3/31 Wolfgang Laun <wolfgang.laun@gmail.com<mailto:wolfgang.laun@gmail.com>> On 31 March 2011 07:58, Benson Fung <benson.redhat@gmail.com<mailto:benson.redhat@gmail.com>> wrote: Hi, If there are 10 rules in the drools rulebase, and right now I would like to execute one of the particular rule. Is there any approach/way to execute particular rule programmatically? No. The right hand side of a rule (code between "then" and "end") is executed whenever there is a set of fact objects in Working Memory satisfying the condition. If you insert such a set of facts and call fireAllRules(), then it will happen. I don't think agenda-group or activation-group can do that, right? Or is it possible to create an agenda programmatically ? No to both. -W Thanks _______________________________________________ rules-users mailing list rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users ________________________________ ************************************************************************************** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmaster(a)nds.com and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00 **************************************************************************************