[rules-users] NullPointerException when load file rules

Tue Jan 10 12:43:34 EST 2012

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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