[rules-users] execute particular rules programmatically and dynamically

[Steven Williams]

I have actually used this method for the one valid case I have thought of -
unit testing rules.

Steve


2011/4/1 Swindells, Thomas <TSwindells at nds.com>

>  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 at lists.jboss.org [mailto:
> rules-users-bounces at 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 at gmail.com>
>
>
>
> On 31 March 2011 07:58, Benson Fung <benson.redhat at 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 at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at 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 at 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
>
> **************************************************************************************
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20110401/ea6caa17/attachment.html