[rules-users] drools design question

[Michael Anstis]

Don't forget Facts are matched as they are inserted into WorkingMemory too.

fireallRules() only executes the resulting activations on the agenda - that
as Thomas states can be controlled by a number of means.

On 17 March 2011 14:04, Swindells, Thomas <TSwindells at nds.com> wrote:

> Actually what you want is that only the rules from the DRLs that you want
> are activated and their consequences run (a subtle but important
> distinction). Put another way it doesn't matter how many rules are in the
> knowledge base and evaluated as long as only the rules you want are matched.
>
> There are two main approaches you could do to control this. The first is to
> use agenda groups with rules in different DRLs being in different agenda
> groups, this then lets you control which groups consequences are run and in
> what order to.
>
> Another approach is to introduce some additional facts into the working
> memory - "EnabledRuleGroup(String groupName)". The first condition in each
> rule would then be the statement "exists EnabledRuleGroup(name
> =="myDlrFilenameXYZ")
> Then only rules matching the statement would be evaluated.
>
> There are probably other variations around this too - things like agenda
> filters to filter out the activations you don't want.
>
> Thomas
>
>
>
> > -----Original Message-----
> > From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
> > bounces at lists.jboss.org] On Behalf Of marunam
> > Sent: 17 March 2011 13:31
> > To: rules-users at lists.jboss.org
> > Subject: Re: [rules-users] drools design question
> >
> > Thanks everyone for your inputs
> >
> > Yes, so the confusion that I have is, with loading multiple drls. If I
> > load
> > all the drls in memory(may be 100s), does it mean that when I say
> > fireallRules, it is going to run the rules from all the drls?? That is
> > what
> > I don't want.
> >
> > For a particular session at runtime, I may need to run drls from just
> > some
> > specific drls and not all the drls. How can I tackle this If I load all
> > the
> > drls?
> >
> > Thank you
> >
> > --
> > View this message in context: http://drools-java-rules-
> > engine.46999.n3.nabble.com/drools-design-question-
> > tp2691182p2693429.html
> > Sent from the Drools - User mailing list archive at Nabble.com.
> > _______________________________________________
> > 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/20110317/cb25cba9/attachment.html