[rules-users] Shadow fact problem?
Edson Tirelli
tirelli at post.com
Thu Mar 15 08:07:36 EDT 2007
Michael,
Sorry, I missed your previous message... why are you moving the check
into the consequence? As you already realized, that is not a good
solution...
Did you tried your original rule in trunk? Bug is still there?
[]s
Edson
Anstis, Michael (M.) wrote:
>Sorry to push Edson,
>
>The performance degradation from having the "parental check" in the RHS
>versus the LHS is (expectedly) terrific. We have thousands of
>"attributes" relating to different parent objects and having the rule
>activate for every combination is causing performance problems. Moving
>the RHS into a LHS "eval" would be no better either.
>
>On a different matter, I have successfully installed the source with
>Maven (thanks Mark) and can debug trunk in Eclipse at home!
>
>With kind regards,
>
>Mike
>
>-----Original Message-----
>From: Anstis, Michael (M.)
>Sent: 14 March 2007 12:28
>To: 'Rules Users List'
>Subject: RE: [rules-users] Shadow fact problem?
>
>OK, Edson, I will try to check it out (I'm having problems accessing
>subversion from work so will try from home).
>
>Whilst trying to implement a workaround though I may have discovered
>another problem (which might have been fixed too):-
>
>rule "A"
>when
> MaterialEntry ( $m : material )
> $a2 : Attribute( name ==
>Constants.ATTRIBUTES_MATERIAL_LOCK_PRESSURE, $mlp : number, parent == $m
>)
> $a3 : Attribute( name ==
>Constants.ATTRIBUTES_MATERIAL_LOCK_PRESSURE_MODIFIER, $lpm : number,
>parent == $m )
>then
> System.out.println("Rule A"); //<-- Never fires
>end
>
>rule "B"
>when
> MaterialEntry ( $m : material )
> $a2 : Attribute( name ==
>Constants.ATTRIBUTES_MATERIAL_LOCK_PRESSURE, $mlp : number )
> $a3 : Attribute( name ==
>Constants.ATTRIBUTES_MATERIAL_LOCK_PRESSURE_MODIFIER, $lpm : number )
>Then
> if($a2.getParent() == $m && $a3.getParent() == $m) {
> System.out.println("Rule B"); //<-- Fires
> }
>end
>
>If the check for "parent" being equal across $m, $a2 and $a3 is in the
>LHS the rule doesn't activate. However if check is in the RHS the rule
>is OK.
>
>Any thoughts or views (Edson)?
>
>Thanks,
>
>Mike
>
>-----Original Message-----
>From: rules-users-bounces at lists.jboss.org
>[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Edson Tirelli
>Sent: 13 March 2007 22:57
>To: Rules Users List
>Subject: Re: [rules-users] Shadow fact problem?
>
>
> Mike,
>
> Yes, that is a "shadow fact unwanted side-effect" (nice name for a
>bug hm? :) ), but I remember fixing something similar as part of another
>
>ticket I was working on. Is it possible for you to verify if the problem
>
>is happening in trunk?
> If it is still hapenning, let me know and I will fix it.
>
> Thank you,
> Edson
>
>Anstis, Michael (M.) wrote:
>
>
>
>>Hi,
>>
>>I am running 3.1-M1 and have (by way of example) two simple rules; A
>>and B as follows:-
>>
>> *rule* "A"
>> *when*
>> $a1 : Attribute ( name == Constants.ATTRIBUTES_A, $pa :
>> number )
>> $a2 : Attribute ( name == Constants.ATTRIBUTES_B, $nc :
>> number )
>> $p : Process ( attributesList* contains* $a1,
>> attributesList* contains* $a2 )
>> *then*
>> * double* txy = doSomeMaths($pa, $nc, $p);
>> Attribute a =* new* Attribute(Constants.ATTRIBUTES_C,
>>
>>
>txy);
>
>
>> $p.addAttribute(a);
>> * assertLogical*(a);
>> * modify*($p);
>> System.out.println("Rule 'A' fired");
>> *end*
>>
>> *rule* "B"
>> *when*
>> $a1 : Attribute ( name == Constants.ATTRIBUTES_C, $txy :
>> number)
>> $p : Process( attributesList* contains* $a1 )
>> // <-- Line causing rule not to activate
>>
>> *then*
>> * double* m = doSomeMoreMaths($txy, $p);
>> System.out.println("Rule 'B' fired");
>> *end*
>>
>>Process exposes an ArrayList of Attribute objects (each having a
>>name\value pair).
>>
>>When the content of the ArrayList held by Process is added to (Rule
>>'A') the next rule (Rule 'B') is not being activated.
>>
>>Can anybody provide any insight into how best a workaround can be
>>engineered?
>>
>>With kind regards,
>>
>>Mike
>>
>>-----------------------------------------------------------------------
>>
>>
>-
>
>
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>>rules-users mailing list
>>rules-users at lists.jboss.org
>>https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>
>>
>
>
>
>
--
Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3124-6000
Mobile: +55 11 9218-4151
JBoss, a division of Red Hat @ www.jboss.com
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