[rules-users] How Can a Drools Rule call another Drools Rule?

[Swindells, Thomas]

Why are you trying to call a specific rule? It doesn't really make sense to talk about calling a rule to begin with and probably shows that you are still thinking imperatively not declaratively.
Rules do not get called. Rules have conditions which determine when they can be activated. Activated rules are then sorted into a priority queue and each in turn has its consequence applied, updating the priority queue as necessary.

If you explain your use case in a bit more detail we may be able to help you structure a more appropriate solution,

Thomas

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Sanjib Karmakar
Sent: 20 August 2010 08:44
To: rules-users at lists.jboss.org
Subject: Re: [rules-users] How Can a Drools Rule call another Drools Rule?


Sir

Thank you very much for your reply.
In fact what I wanted to execute the specific rule out of say 10 rules.

I have tried
ksession.fireAllRules(2);
Then only first 2 rules get executed.

Please let me know if there is any way-out to call specific rules out of bunch of rules.
It would be extremely helpful if you please share a code snippet regarding this.

Regards
Sanjib Karmakar
SkyTech Solutions Pvt. Ltd

Please consider the environment before printing this email.

"Wolfgang Laun-2 [via Drools - Java Rules Engine]" <[hidden email]</user/SendEmail.jtp?type=node&node=1238924&i=0>>

08/19/2010 07:45 PM

To

Sanjib Karmakar <[hidden email]</user/SendEmail.jtp?type=node&node=1238924&i=1>>

cc

Subject

Re: How Can a Drools Rule call another Drools Rule?







Rules are never "called". Changes in WM create (and also delete)
"activations": tuples consisting of a rule and the fact objects
matching the left hand side patterns. From this set of activations,
rule right hand sides are executed according to salience (and other
criteria).

Perhaps if you describe the actual problem...?

-W


On 19 August 2010 06:58, Sanjib Karmakar <[hidden email]</user/SendEmail.jtp?type=node&node=1225490&i=0&by-user=t>> wrote:

>
> Hi friends
>
> I would like to execute a rule say Rule-1 from inside another rule say
> Rule-2.
> In project I am using xml and not drl, and I am using Drools 5.0
>
> Please let me know how to call a rule from another rule.
>
> Thanks
> Sanjib
> --
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