Keep in mind that rules are declarative, it is against the nature of a rule based expert system to force a rule to fire; youre kind of treating the rule like a function.

My best advice is....

1)Create a POJO called "Flag", store a String and Boolean inside of it.

2)On the RHS of the first rule, create the POJO and set the string to something like "rule-03-fired" and set the boolean to 'true'

3)In the rule you want to fire, add a pattern to check for a Flag Fact Template with String value 'rule-03-fired' and 'true'

Note, this is normally done in CLIPS/JESS as logical assertions, but Drools does not have this. However, i'm sure it's implemented the same on the back end.

2010/8/21 Michael Anstis <michael.anstis@gmail.com>
Look at the API; the overloaded method you use will only fire 2 rules.

You probably need fireAllRules();

2010/8/20 Sanjib Karmakar <sanjibk@skytechsolutions.co.in>

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]>

08/19/2010 07:45 PM

To
Sanjib Karmakar <[hidden email]>
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]> 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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