11:58 p.m.
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
--
View this message in context:
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12:35 a.m.
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 <sanjibk(a)skytechsolutions.co.in> 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
--
View this message in context:
http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule...
Sent from the Drools - User mailing list archive at Nabble.com.
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2:43 a.m.
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]"
<ml-node+1225490-1260937792-82539(a)n3.nabble.com>
08/19/2010 07:45 PM
To
Sanjib Karmakar <sanjibk(a)skytechsolutions.co.in>
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
--
View this message in context:
http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule...
Sent from the Drools - User mailing list archive at Nabble.com.
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3:27 a.m.
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(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On
Behalf Of Sanjib Karmakar
Sent: 20 August 2010 08:44
To: rules-users(a)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
--
View this message in context:
http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule...
Sent from the Drools - User mailing list archive at Nabble.com.
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4:26 p.m.
Look at the API; the overloaded method you use will only fire 2 rules.
You probably need fireAllRules();
2010/8/20 Sanjib Karmakar <sanjibk(a)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]<http://user/SendEmail.jtp?type=node&node=1238924&i=0>
>*
08/19/2010 07:45 PM
To
Sanjib Karmakar <[hidden
email]<http://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]*<http://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
> --
> View this message in context: *
http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule...
*<http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule-call-another-Drools-Rule-tp1219190p1219190.html?by-user=t&by-user=t>
> Sent from the Drools - User mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> *[hidden
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9:53 p.m.
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(a)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(a)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]<http://user/SendEmail.jtp?type=node&node=1238924&i=0>
> >*
>
> 08/19/2010 07:45 PM
> To
> Sanjib Karmakar <[hidden
email]<http://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]*<http://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
> > --
> > View this message in context: *
>
http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule...
>
*<http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule-call-another-Drools-Rule-tp1219190p1219190.html?by-user=t&by-user=t>
> > Sent from the Drools - User mailing list archive at Nabble.com.
> > _______________________________________________
> > rules-users mailing list
> > *[hidden
email]*<http://user/SendEmail.jtp?type=node&node=1225490&i=1&by-user=t>
> >
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> >
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7:10 a.m.
Drools have logicalInsert, what do you mean with: drools doesn't have this? It behaves
differently than Jess and clips?
- CTO @ http://www.plugtree.com
- MyJourney @ http://salaboy.wordpress.com
- Co-Founder @ http://www.jbug.com.ar
- Mauricio "Salaboy" Salatino -
On 21/08/2010, at 23:53, Socrates Frangis <soc.frangis(a)gmail.com> wrote:
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(a)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(a)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
> --
> View this message in context:
http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule...
> Sent from the Drools - User mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> [hidden email]
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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8:05 p.m.
I apologize, should have chosen my words better...
Drools does have 'logical assertion' in the sense that a fact will be
inserted and automatically retracted when it's conditions are no longer
true.
I meant it in the sense of in JESS/CLIPS you can assert an non-structured
template to trigger another rule (as in this message board question where
the issue was how to cause a rule to fire when another rule fires)
JESS/CLIPS Example:
(deftemplate fire-my-special-rule) //Notice no structure of the template,
its just an object called 'fire-my-special-rule'
(defrule initial-rule
(blah...blah...patterns which make the first rule fire)
=>
(do some RHS actions)
(assert (fire-my-special-rule))
)
(defrule special-rule
(fire-my-special-rule) //here im just checking for the existance or truth
of 'fire-my-special-rule'
=>
(RHS ACTIONS)
)
What i was getting at was, in JESS/CLIPS you can achieve what this question
was asking by creating a deftemplate in the rule file that has no structure
and use it to trigger another rule. In Drools you can not do this exactly,
but if you created your own POJO 'flag' that stores a string and a boolean,
then you could store to the string "fire-my-special-rule" and set the
boolean to TRUE. In your Drool DRL rule, check to see if the flag pojo has
it's string value as "fire-my-special-rule" and boolean "true".
Sorry, going on tangent, but yes i misspoke when i said Drools did not have
Logical Assertions, it does. It just doesn't allow you to assert an
unstructured template as does other rule engines do (which would have
answered the original question in an easier / less hacked manner than my
Flag POJO suggestion)
2010/8/22 Salaboy <salaboy(a)gmail.com>
Drools have logicalInsert, what do you mean with: drools doesn't
have this?
It behaves differently than Jess and clips?
- CTO @ <http://www.plugtree.com>http://www.plugtree.com
- MyJourney @ <http://salaboy.wordpress.com>http://salaboy.wordpress.com
- Co-Founder @ <http://www.jbug.com.ar>http://www.jbug.com.ar
- Mauricio "Salaboy" Salatino -
On 21/08/2010, at 23:53, Socrates Frangis <soc.frangis(a)gmail.com> wrote:
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(a)gmail.com>
michael.anstis(a)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(a)skytechsolutions.co.in>
> sanjibk(a)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]<http://user/SendEmail.jtp?type=node&node=1238924&i=0>
>> >*
>>
>> 08/19/2010 07:45 PM
>> To
>> Sanjib Karmakar <[hidden
email]<http://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]*<http://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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1:01 a.m.
Some remarks to put things right, see below.
2010/8/23 Socrates Frangis <soc.frangis(a)gmail.com>
I meant it in the sense of in JESS/CLIPS you can assert an non-structured
template to trigger another rule (as in this message board question where
the issue was how to cause a rule to fire when another rule fires)
JESS/CLIPS Example:
(deftemplate fire-my-special-rule) //Notice no structure of the template,
its just an object called 'fire-my-special-rule'
(defrule initial-rule
(blah...blah...patterns which make the first rule fire)
=>
(do some RHS actions)
(assert (fire-my-special-rule))
)
(defrule special-rule
(fire-my-special-rule) //here im just checking for the existance or
truth of 'fire-my-special-rule'
=>
(RHS ACTIONS)
)
What i was getting at was, in JESS/CLIPS you can achieve what this question
was asking by creating a deftemplate in the rule file that has no structure
and use it to trigger another rule. In Drools you can not do this exactly,
But you *can* do this in Drools, using
declare fireMySpecialRule
x : int
end
in a .drl file to declare the trigger class, or you could even one of the
classes from Java, String or Integer or whatever.
Sorry, going on tangent, but yes i misspoke when i said Drools did
not have
Logical Assertions, it does. It just doesn't allow you to assert an
unstructured template as does other rule engines do
Since Jess' "ordered template" implies a field for its data, there's
not
much difference here. Drools simply uses Java objects throughout, while Jess
has its (legacy) deftemplates which have to be linked to POJOs with the
"shadow fact" mechanism.
(which would have answered the original question in an easier / less
hacked
manner than my Flag POJO suggestion)
But I don't think that setting up a LHS with a single trigger pattern as you
do in the rule "special-rule" and to insert a matching trigger fact just to
execute a few statements in the RHS of that rule is what the original poster
meant by "firing a rule". That would be utterly pointless and contrived.
Executing some statements is better done by defining a function and calling
it, both in Drools and Jess.
-W
12:40 a.m.
I think The Drools Way is to change something in the working memory to cause
the secondary rule to be fired.
On Wed, Aug 18, 2010 at 9:58 PM, Sanjib Karmakar <
sanjibk(a)skytechsolutions.co.in> 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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6:03 a.m.
Have a look at Drools Flow if this is what you really need to achieve.
Ordinarily the order in which the rules need apply is not essential as a
consequence is inferred from the facts in working memory.
Truth maintenance and the agenda support the inference mechanisms.
2010/8/19 Nick Heudecker <nheudecker(a)gmail.com>
I think The Drools Way is to change something in the working memory
to
cause the secondary rule to be fired.
On Wed, Aug 18, 2010 at 9:58 PM, Sanjib Karmakar <
sanjibk(a)skytechsolutions.co.in> 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
> --
> View this message in context:
>
http://drools-java-rules-engine.46999.n3.nabble.com/How-Can-a-Drools-Rule...
> Sent from the Drools - User mailing list archive at Nabble.com.
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10 comments
7 participants
participants (7)
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Michael Anstis -
Nick Heudecker -
Salaboy -
Sanjib Karmakar -
Socrates Frangis -
Swindells, Thomas -
Wolfgang Laun