[rules-users] NullPointerException when load file rules

Mauricio Salatino salaboy at gmail.com
Tue Jan 10 12:46:28 EST 2012 

If it works we can prove that most of the OSGI containers works in the
same way :)

2012/1/10 elMateo <soyelmateo at gmail.com>:
> Hi Mauricio,
>
> I'm going to test this.
>
> Thank you so much!!
>
> On Tue, Jan 10, 2012 at 6:35 PM, Mauricio Salatino <salaboy at gmail.com>
> wrote:
>>
>> Oh.. I see what is happening here.. the Default dialects and session
>> configurations are not being loaded by your OSGI environment :)
>> It took me a while to find that out so I hope this comment helps you
>> to save some valuable time.
>> Solution: you need to add inside your project that is loading the
>> rules the following file:
>> META-INF/drools.packagebuilder.conf
>>
>> That contains the following content:
>> drools.dialect.default = java
>> drools.dialect.java =
>> org.drools.rule.builder.dialect.java.JavaDialectConfiguration
>> drools.dialect.java.compiler = ECLIPSE
>>
>> drools.dialect.mvel =
>> org.drools.rule.builder.dialect.mvel.MVELDialectConfiguration
>> drools.dialect.mvel.strict = true
>> drools.dialect.mvel.langLevel = 4
>>
>> drools.accumulate.function.average =
>> org.drools.base.accumulators.AverageAccumulateFunction
>> drools.accumulate.function.max =
>> org.drools.base.accumulators.MaxAccumulateFunction
>> drools.accumulate.function.min =
>> org.drools.base.accumulators.MinAccumulateFunction
>> drools.accumulate.function.count =
>> org.drools.base.accumulators.CountAccumulateFunction
>> drools.accumulate.function.sum =
>> org.drools.base.accumulators.SumAccumulateFunction
>> drools.accumulate.function.collectList =
>> org.drools.base.accumulators.CollectListAccumulateFunction
>> drools.accumulate.function.collectSet =
>> org.drools.base.accumulators.CollectSetAccumulateFunction
>>
>> drools.evaluator.coincides =
>> org.drools.base.evaluators.CoincidesEvaluatorDefinition
>> drools.evaluator.before =
>> org.drools.base.evaluators.BeforeEvaluatorDefinition
>> drools.evaluator.after =
>> org.drools.base.evaluators.AfterEvaluatorDefinition
>> drools.evaluator.meets =
>> org.drools.base.evaluators.MeetsEvaluatorDefinition
>> drools.evaluator.metby =
>> org.drools.base.evaluators.MetByEvaluatorDefinition
>> drools.evaluator.overlaps =
>> org.drools.base.evaluators.OverlapsEvaluatorDefinition
>> drools.evaluator.overlappedby =
>> org.drools.base.evaluators.OverlappedByEvaluatorDefinition
>> drools.evaluator.during =
>> org.drools.base.evaluators.DuringEvaluatorDefinition
>> drools.evaluator.includes =
>> org.drools.base.evaluators.IncludesEvaluatorDefinition
>> drools.evaluator.starts =
>> org.drools.base.evaluators.StartsEvaluatorDefinition
>> drools.evaluator.startedby =
>> org.drools.base.evaluators.StartedByEvaluatorDefinition
>> drools.evaluator.finishes =
>> org.drools.base.evaluators.FinishesEvaluatorDefinition
>> drools.evaluator.finishedby =
>> org.drools.base.evaluators.FinishedByEvaluatorDefinition
>> drools.evaluator.equality =
>> org.drools.base.evaluators.EqualityEvaluatorsDefinition
>> drools.evaluator.comparable =
>> org.drools.base.evaluators.ComparableEvaluatorsDefinition
>> drools.evaluator.set = org.drools.base.evaluators.SetEvaluatorsDefinition
>> drools.evaluator.matches =
>> org.drools.base.evaluators.MatchesEvaluatorsDefinition
>> drools.evaluator.soundslike =
>> org.drools.base.evaluators.SoundslikeEvaluatorsDefinition
>>
>> That is provided by drools-compiler.jar or drools-core.jar (I don't
>> have the code here) but it's not being picked up by the OSGI
>> container.
>>
>> Cheers
>>
>>
>> 2012/1/10 elMateo <soyelmateo at gmail.com>:
>> > I'm using Drools 5.4.0 Beta 1 and my DRL is the Hello World of Drools :)
>> > (all my application is the Hello World of Drools, because I'm trying to
>> > do a
>> > OSGi bundle with this application).
>> >
>> > In my OSGi framework is running drools.core, drools.compiler and
>> > knowledge-api, and others bundles.
>> >
>> > Thanks for reply me.
>> >
>> > On Tue, Jan 10, 2012 at 6:15 PM, Swindells, Thomas <TSwindells at nds.com>
>> > wrote:
>> >>
>> >> Looking at the stack trace, if you are on the same version as drools as
>> >> me
>> >> it looks like it is this line
>> >> this.rule.setDialect( getDialect().getId() );
>> >>
>> >> The most likely reason is your DRL isn't valid - perhaps where you are
>> >> specifying the dialect, or it could be your
>> >> Dependencies aren't right or something.
>> >> Which version of drools are you using. Have you tried reducing your DRL
>> >> file to the minimum that generates the error - then post that DRL if
>> >> you
>> >> need further help.
>> >>
>> >> Thomas
>> >>
>> >> > -----Original Message-----
>> >> > From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
>> >> > bounces at lists.jboss.org] On Behalf Of jjmartinez
>> >> > Sent: 10 January 2012 17:05
>> >> > To: rules-users at lists.jboss.org
>> >> > Subject: Re: [rules-users] NullPointerException when load file rules
>> >> >
>> >> > Anybody can help me? I don't know why my application show these
>> >> > errors.
>> >> >
>> >> > Thanks in advance!
>> >> >
>> >> > java.lang.NullPointerException
>> >>        at
>> >>
>> >> org.drools.rule.builder.RuleBuildContext.<init>(RuleBuildContext.java:88)
>> >>        at
>> >> org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1149)
>> >>        at
>> >> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:636)
>> >>        at
>> >>
>> >> org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:266)
>> >>        at
>> >>
>> >> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:458)
>> >>        at
>> >>
>> >> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
>> >>        at
>> >> drools.ejemplos.DroolsTest.readKnowledgeBase(DroolsTest.java:85)
>> >>        at drools.ejemplos.DroolsTest.execute(DroolsTest.java:64)
>> >>        at drools.ejemplos.DroolsTest.<init>(DroolsTest.java:56)
>> >>        at drools.ejemplos.Activator.start(Activator.java:14)
>> >>        at
>> >> org.knopflerfish.framework.BundleImpl.start0(BundleImpl.java:356)
>> >>        at
>> >> org.knopflerfish.framework.BundleThread.run(BundleThread.java:107)
>> >>
>> >>
>> >>
>> >>
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>>
>>
>>
>> --
>>  - 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 -
>>
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>
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-- 
 - 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 -

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