[rules-users] Error in MVEL execution (optimization?)

[Mark Proctor]

Can't determine the problem from your posting. Maybe make a self 
contained unit test, like in MiscTest, so we can see the problem.
https://github.com/droolsjbpm/drools/blob/master/drools-compiler/src/test/java/org/drools/integrationtests/MiscTest.java

Mark
On 05/01/2012 00:07, ronalbury wrote:
> I hardly got any viewers (and no responses) when I posted this just as "MVEL
> Optimization" ... so I have changed the subject and re-posted (my apologies
> if I just broke protocol).
>
>
> I'm not sure how to explain this, other than it appears that MVEL is trying
> to optimize the When conditions in my rules.
>
> I have a utility class, Test, with a number of methods on it (including null
> protected versions of Drools "in" and "matches").  Note that the valueInList
> method can return null (e.g. if the product code is null), and the
> getAgeAsInt method can also return null (if the age is null).  I don't like
> having to test if the result of the method is true, but I kept running into
> null pointer errors in the Drools expression evaluation code and had to
> adopt this convention.
>
> Here are two example rules (one in Java dialect and one in MVEL dialect).  I
> realize that a list of one is a degenerate case for using 'inList', but it
> should still work.
>
> rule "Term 15Plus Max Age - Washington"
>          dialect "java"
>          when
>                  $ea : EasyApp(
>                          Test.valueInList($ea.getEaProductCode(),
> "L15P")==true
>                      &&  Test.valueInList($ea.getEaIssueState(), "WA")==true
>                      &&  $ea.getPriIns_xmPerson().getAgeAsInt()>  65
>                      )
>          then
>                  $ea.addError(drools.getRule().getName());
> end
>
> rule "Term 20 Max Age - New Jersey"
>          when
>                  $ea : EasyApp(
>                          Test.valueInList(eaProductCode, "L20")==true
>                      &&  Test.valueInList(eaIssueState, "NJ")==true
>                      &&  priIns_xmPerson.ageAsInt>  64
>                      )	
>          then
>                  $ea.addError(drools.getRule().getName());
> end
>
> I have approximately 30 different rules similar to those above.  When I have
> the rules written in MVEL, it appears to be only be evaluating one rule per
> EasyApp injection (I have a log message when ever valueInList is called),
> and I get bogus results.  However, when I shift to java dialect then it
> appears that the methods are called for each rule I have defined (as I would
> have expected).
>
> Can anyone tell me if I am doing something wrong, and explain why Drools is
> behaving as it is?
>
> Thanks
>
> --
> View this message in context: http://drools.46999.n3.nabble.com/Error-in-MVEL-execution-optimization-tp3633440p3633440.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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