[rules-users] Working Memory and agenda-group
Maciej Gowin
maciej.abacus.gowin at gmail.com
Thu Dec 29 20:12:25 EST 2011
I agree - my mistake, Because of tests I've forgotten to delete 'X'... So
it's not the case... Sorry...
But did another try and when I've used
rule "Check Object A and Set Default"
dialect "mvel"
It was not working correctly. Then I moved to:
rule "Check Object A and Set Default"
dialect "java"
and it works fine. So it is ok if we will change Mike's 'NOT WORKING'
example to:
--------------------------------------------------
package com.sample
import com.sample.ObjectA
import org.drools.WorkingMemory
function void insertDefault(WorkingMemory workingMemory) {
SomeDefault someDefault = new SomeDefault();
someDefault.setMinValueA(100);
someDefault.setMinValueB(20.0);
someDefault.setMaxValueB(20000.0);
workingMemory.insert(someDefault);
}
declare SomeDefault
minValueA : Integer
minValueB : Double
maxValueB : Double
end
rule "Check Object A and Set Default"
dialect "java"
agenda-group "Foo"
salience 100
when
$a : ObjectA()
then
insertDefault(drools.getWorkingMemory());
end
rule "Use the defaults"
dialect "mvel"
agenda-group "Foo"
salience 90
when
$default : SomeDefault()
then
System.out.println("Default minA=" + $default.minValueA)
end
--------------------------------------------------
Any ideas why?
2011/12/30 Mauricio Salatino <salaboy at gmail.com>
> One is SomeDefault and the other one is SomeDefaultX.
> The Declared type, as far as I remember overrides the to string with
> the representation that you are seeing there:
> SomeDefault( minValueA=100, minValueB=20.0, maxValueB=20000.0 )
> What is SomeDefaultX??
> Cheers
> 2011/12/29 Maciej Gowin <maciej.abacus.gowin at gmail.com>:
> > I did some debbuging with 'declare SomeDefault'. This is what I found:
> >
> > CASE1: RHS = drools.getWorkingMemory().insert(new SomeDefaultX())
> > Working memory objects:
> > Object[fact
> > 0:2:2082419441:2082419441:2:DEFAULT:com.sample.SomeDefaultX at 7c1f32f1]
> > Object[fact 0:1:140683595:140683595:1:DEFAULT:com.sample.ObjectA at 862a94b
> ]
> >
> > CASE2: RHS = insertDefault(drools.getWorkingMemory())
> > Working memory objects:
> > Object[fact 0:2:176338845:1:2:DEFAULT:SomeDefault( minValueA=100,
> > minValueB=20.0, maxValueB=20000.0 )]
> > Object[fact
> 0:1:1125048577:1125048577:1:DEFAULT:com.sample.ObjectA at 430ee101]
> >
> > Please note the difference between DEFAULT:com.sample.SomeDefault and
> > DEFAULT:SomeDefault.
> > So when inserting an object to WorkingMemory inside function
> insertDefault
> > which is declared in DRL file
> > something strange is going on... It seems like it is a bug. It is worth
> > mentioning that I get following result
> > inside insertDefault:
> > System.out.println(SomeDefault.class.getName());
> > ---> com.sample.SomeDefault
> >
> > Hope it will help :)
> >
> >
> >
> >
> > 2011/12/30 Maciej Gowin <maciej.abacus.gowin at gmail.com>
> >>
> >> Of course it's only my guess. I'm not an expert. Please correct me if
> I'm
> >> wrong :)
> >>
> >>
> >> 2011/12/30 Maciej Gowin <maciej.abacus.gowin at gmail.com>
> >>>
> >>> It's not the different WorkingMemory. It's all about class name
> >>> confusion. It looks like the class type does not match.
> >>> Please try to create SomeDefault in standard way, not with 'declare'
> >>> statement. It works ok.
> >>>
> >>>
> >>> 2011/12/30 Mike Key <mikey at zenbitz.com>
> >>>>
> >>>> I guess that is exactly my confusion :) Why would it be that doing
> the
> >>>> exact same thing, one inserting into working memory from a function
> and the
> >>>> other simply doing it within the RHS of the rule cause downstream
> rules not
> >>>> to fire in the function call case? The rules are both in the same
> >>>> agenda-group, both the function example and the insert from the RHS
> of the
> >>>> rule example are simply inserting a new fact into working memory.
> >>>>
> >>>> It makes it seem like the function call is somehow inserting into a
> >>>> *different* working memory, which I'm sure is not the case, but the
> >>>> downstream rule does not fire none-the-less.
> >>>>
> >>>> Thanks for any clarity.
> >>>>
> >>>>
> >>>> On Thu, Dec 29, 2011 at 3:59 PM, Mauricio Salatino <salaboy at gmail.com
> >
> >>>> wrote:
> >>>>>
> >>>>> Agenda-groups segment the agenda and not the working memory :)
> >>>>> Probably that is part of your confusion.
> >>>>>
> >>>>>
> >>>>> 2011/12/29 Mike Key <mikey at zenbitz.com>:
> >>>>> > I am a fairly new Drools user and am trying to understand how
> working
> >>>>> > memory
> >>>>> > is segmented when using agenda groups. I have an agenda-group that
> >>>>> > has
> >>>>> > focus set immediately from the session as follows with a few
> objects
> >>>>> > being
> >>>>> > inserted:
> >>>>> >
> >>>>> > ksession.insert(objectA);
> >>>>> > ksession.insert(objectB);
> >>>>> > ksession.getAgenda().getAgendaGroup("Foo").setFocus();
> >>>>> >
> >>>>> > I have 2 rules simplified down to illustrate my confusion. The
> first
> >>>>> > rule
> >>>>> > simply sets some default values evaluated in the second rule if
> >>>>> > objectA
> >>>>> > exists. In the example that works I set the defaults in the RHS
> >>>>> > explicitly.
> >>>>> > However I want to use these defaults from different agenda-groups,
> >>>>> > so when
> >>>>> > I put them in a function, the second rule never fires, the
> activation
> >>>>> > is
> >>>>> > created for the first rule but never the second. Can someone tell
> me
> >>>>> > why
> >>>>> > the use of a function seems to alter the truth of the rule?
> >>>>> >
> >>>>> > THIS WORKS:
> >>>>> >
> >>>>> > declare SomeDefault
> >>>>> > minValueA : Integer
> >>>>> > minValueB : Double
> >>>>> > maxValueB : Double
> >>>>> > end
> >>>>> >
> >>>>> > rule "Check Object A and Set Default"
> >>>>> > agenda-group "Foo"
> >>>>> > salience 100
> >>>>> > when
> >>>>> > $a : ObjectA()
> >>>>> > then
> >>>>> > default = new SomeDefault()
> >>>>> > default.minValueA = 100
> >>>>> > default.minValueB = 20.0
> >>>>> > default.maxValueB = 20000.0
> >>>>> > insert(default)
> >>>>> > end
> >>>>> >
> >>>>> > rule "Use the defaults"
> >>>>> > agenda-group "Foo"
> >>>>> > salience 100
> >>>>> > when
> >>>>> > $default : SomeDefault()
> >>>>> > then
> >>>>> > System.out.println("Default minA=" + $default.minValueA)
> >>>>> > end
> >>>>> >
> >>>>> > THIS DOES NOT WORK:
> >>>>> >
> >>>>> > declare SomeDefault
> >>>>> > minValueA : Integer
> >>>>> > minValueB : Double
> >>>>> > maxValueB : Double
> >>>>> > end
> >>>>> >
> >>>>> > rule "Check Object A and Set Default"
> >>>>> > agenda-group "Foo"
> >>>>> > salience 100
> >>>>> > when
> >>>>> > $a : ObjectA()
> >>>>> > then
> >>>>> > insertDefault(drools.getWorkingMemory())
> >>>>> > end
> >>>>> >
> >>>>> > rule "Use the defaults"
> >>>>> > agenda-group "Foo"
> >>>>> > salience 90
> >>>>> > when
> >>>>> > $default : SomeDefault()
> >>>>> > then
> >>>>> > System.out.println("Default minA=" + $default.minValueA)
> >>>>> > end
> >>>>> >
> >>>>> > function void insertDefault(WorkingMemory workingMemory) {
> >>>>> > SomeDefault default = new SomeDefault();
> >>>>> > default.setMinValueA(100);
> >>>>> > default.setMinValueB(20.0);
> >>>>> > default.setMaxValueB(20000.0);
> >>>>> > workingMemory.insert(default);
> >>>>> > }
> >>>>> >
> >>>>> > In the latter (non-working) example the first rule activates and
> then
> >>>>> > drools
> >>>>> > returns, it never even attempts to try to fire the second rule.
> >>>>> > However in
> >>>>> > the working example BOTH rules fire as I would expect. I am
> guessing
> >>>>> > this
> >>>>> > is a simple misunderstanding on my part. Any assistance in
> >>>>> > understanding
> >>>>> > why this nuance doesn't seem to work would be greatly appreciated.
> >>>>> >
> >>>>> > Thanks.
> >>>>> >
> >>>>> > MiKey
> >>>>> >
> >>>>> > _______________________________________________
> >>>>> > rules-users mailing list
> >>>>> > rules-users at lists.jboss.org
> >>>>> > https://lists.jboss.org/mailman/listinfo/rules-users
> >>>>> >
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> - CTO @ http://www.plugtree.com
> >>>>> - MyJourney @ http://salaboy.wordpress.com
> >>>>> - Co-Founder @ http://www.jugargentina.org
> >>>>> - Co-Founder @ http://www.jbug.com.ar
> >>>>>
> >>>>> - Salatino "Salaboy" Mauricio -
> >>>>>
> >>>>> _______________________________________________
> >>>>> 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
> >>>>
> >>>
> >>
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
>
>
> --
> - CTO @ http://www.plugtree.com
> - MyJourney @ http://salaboy.wordpress.com
> - Co-Founder @ http://www.jugargentina.org
> - Co-Founder @ http://www.jbug.com.ar
>
> - Salatino "Salaboy" Mauricio -
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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