[rules-users] NullPointerException when load file rules
Mauricio Salatino
salaboy at gmail.com
Tue Jan 10 12:50:21 EST 2012
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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>> >>
>> >>
>> >>
>> >> --
>> >> - 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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>> >> 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 -
>>
>> _______________________________________________
>> 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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--
- 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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