[rules-users] Working Memory and agenda-group
Mike Key
mikey at zenbitz.com
Fri Dec 30 12:08:08 EST 2011
Thanks everyone for the responses. Maciej I did in fact try declaring the
class within a package and saw similar oddities. Thanks for the excellent
assistance.
Wolfgang, I have filed JIRA JBRULES-3322 for this issue.
https://issues.jboss.org/browse/JBRULES-3322
Thanks again for the assistance everyone.
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
>>>>>
>>>>
>>>>
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>>>
>>
>
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