[rules-users] NullPointerException when load file rules
Mauricio Salatino
salaboy at gmail.com
Tue Jan 10 13:02:30 EST 2012
:) It took me almost two days following bad leads.. We definitely need
to improve how those configurations are loaded by default.. and if
they are not there we should not have an NPE.
Cheers
2012/1/10 elMateo <soyelmateo at gmail.com>:
> Yes, mvel2 is a bundle in my framework and I add this file in META-INF.
>
> I find drools.packagebuilder.conf in droos-compiler, and I copy this to my
> META-INF dir.
>
> And it works!!!!!! Aleluya!!!!
>
>
> On Tue, Jan 10, 2012 at 6:50 PM, Mauricio Salatino <salaboy at gmail.com>
> wrote:
>>
>> Do you have the mvel2 bundle in your class path?
>> Did you add the file that I mention inside the META-INF dir inside your
>> app?
>>
>> Cheers.
>>
>> 2012/1/10 elMateo <soyelmateo at gmail.com>:
>> > Now, this is the trace: (it's different to the other)
>> >
>> > org.drools.RuntimeDroolsException: Unable to load dialect ':mvel:null'
>> > [stderr] at
>> >
>> > org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:283)
>> > [stderr] at
>> >
>> > org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:268)
>> > [stderr] at
>> >
>> > org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:181)
>> > [stderr] at
>> >
>> > org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:159)
>> > [stderr] at
>> > org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:210)
>> > [stderr] at
>> > org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:143)
>> > [stderr] at
>> >
>> > org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:34)
>> > [stderr] at
>> >
>> > org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:47)
>> > [stderr] at
>> > drools.ejemplos.DroolsTest.readKnowledgeBase(DroolsTest.java:94)
>> > [stderr] at drools.ejemplos.DroolsTest.execute(DroolsTest.java:68)
>> > [stderr] at drools.ejemplos.DroolsTest.<init>(DroolsTest.java:60)
>> > [stderr] at drools.ejemplos.Activator.start(Activator.java:14)
>> > [stderr] at
>> > org.knopflerfish.framework.BundleImpl.start0(BundleImpl.java:356)
>> > [stderr] at
>> > org.knopflerfish.framework.BundleThread.run(BundleThread.java:107)
>> > [stderr] Caused by: java.lang.NullPointerException
>> > [stderr] at
>> >
>> > org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:278)
>> > [stderr] ... 13 more
>> >
>> > On Tue, Jan 10, 2012 at 6:46 PM, Mauricio Salatino <salaboy at gmail.com>
>> > wrote:
>> >>
>> >> 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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>> >> >> >> _______________________________________________
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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 -
>> >> >>
>> >> >> _______________________________________________
>> >> >> rules-users mailing list
>> >> >> rules-users at lists.jboss.org
>> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
>> >> >
>> >> >
>> >> >
>> >> > _______________________________________________
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>> >> > 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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>> > 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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--
- 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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