[rules-users] Planner has trouble creating a configurer: how to debug
Geoffrey De Smet
ge0ffrey.spam at gmail.com
Mon Jan 30 03:15:48 EST 2012
Yes, this should work as the javabean spec allows it and both Drools
Expert and Planner support it:
public boolean isFixed() {...}
but IIRC a wrapper Boolean shouldn't:
public Boolean isFixed() {...}
Op 30-01-12 08:33, Michael Anstis schreef:
>
> Drools, and hence I assume Planner, *should* handle boolean "is"
> accessor. Can you provide more details?
>
> sent on the move
>
> On 30 Jan 2012 07:05, "aitchnyu" <jesvinj at technovia.co.in
> <mailto:jesvinj at technovia.co.in>> wrote:
>
> I have news for you!
>
> I had an obvious and (bad surprise) buggy mismatch.
>
> The obvious mismatch was: setBlockList and getBlocklist (small 'l'
> in the
> getter).
>
> The other mismatch was isFixed and setFixed. *Drools hates the
> 'is'* because
> (as I guessed) of it's introspector mechanism. It worked only when
> I renamed
> it to getFixed. Your bugfix would have harmed instead of helped,
> as it would
> have let that error pass silently.
>
> Please open an issue to address this.
>
> Wish I wasnt religious to name boolean getters with 'is'. I will
> notify of
> further problems once the problem gets back on track.
>
>
> ge0ffrey wrote
> >
> > Hi,
> >
> > The NullPointerException should definitely not happen, you
> should get a
> > decent error message describing what's wrong.
> > It's fixed in 5.4.0.Beta1.
> >
> > It looks like you're running into:
> > https://issues.jboss.org/browse/JBRULES-3247
> > Upgrade to planner 5.4.0.Beta1
> > or add a getter for that setter.
> >
> > Op 28-01-12 06:17, aitchnyu schreef:
> >> I tried to create a solver from XML configuration. But the
> entire process
> >> returns a *cryptic error message *that makes no sense.
> >>
> >> How do I fix this? And how can I make sense of this to actually
> solve
> >> similar problems like this?
> >>
> >> Please excuse me if I made any bad karma. This is my first post
> on this
> >> (and
> >> any) mailing list.
> >>
> >> jesvin at Jesvin-Technovia:~/dev/drools/sudoku$ java App
> >> Exception in thread "main" java.lang.NullPointerException
> >> at
> >>
> org.drools.planner.core.domain.solution.SolutionDescriptor.processPropertyAnnotations(SolutionDescriptor.java:69)
> >> at
> >>
> org.drools.planner.core.domain.solution.SolutionDescriptor.<init>(SolutionDescriptor.java:61)
> >> at
> >>
> org.drools.planner.config.solver.SolverConfig.buildSolutionDescriptor(SolverConfig.java:197)
> >> at
> >>
> org.drools.planner.config.solver.SolverConfig.buildSolver(SolverConfig.java:167)
> >> at
> >>
> org.drools.planner.config.XmlSolverConfigurer.buildSolver(XmlSolverConfigurer.java:103)
> >> at App.createSolver(App.java:62)
> >> at App.main(App.java:40)
> >>
> >> The function that throws it is listed here. The line is of
> course `return
> >> configurer.buildSolver();`.
> >>
> >> private static Solver createSolver(){
> >> XmlSolverConfigurer configurer = new XmlSolverConfigurer();
> >> File file = new File("solver.xml");
> >> FileInputStream fin = null;
> >> try{
> >> fin = new FileInputStream(file);
> >> }
> >> catch(IOException e){
> >> System.out.println("Unable to read drl");
> >> }
> >> configurer.configure(fin);
> >>
> >>
> //configurer.configure("/home/jesvin/dev/drools/sudoku/solver.xml");
> >> return configurer.buildSolver();
> >> }
> >>
> >> The content of the XML:
> >>
> >> <?xml version="1.0" encoding="UTF-8"?>
> >> <solver>
> >> <environmentMode>DEBUG</environmentMode>
> >>
> >> <solutionClass>domain.Sudoku</solutionClass>
> >> <planningEntityClass>domain.Digit</planningEntityClass>
> >> <scoreDrl>score.drl</scoreDrl>
> >> <scoreDefinition>
> >> <scoreDefinitionType>SIMPLE</scoreDefinitionType>
> >> </scoreDefinition>
> >>
> >> <termination>
> >> <scoreAttained>0</scoreAttained>
> >> </termination>
> >>
> >> <constructionHeuristic>
> >> <constructionHeuristicType>FIRST_FIT</constructionHeuristicType>
> >>
> >>
> >> <moveFactoryClass>solution.RowChangeMoveFactory</moveFactoryClass>
> >> </selector>
> >> <acceptor>
> >> <completeSolutionTabuSize>1000</completeSolutionTabuSize>
> >> </acceptor>
> >> <forager>
> >>
> >> </forager>
> >> </localSearch>
> >> </solver>
> >>
> >> --
> >> View this message in context:
> >>
> http://drools.46999.n3.nabble.com/Planner-has-trouble-creating-a-configurer-how-to-debug-tp3695307p3695307.html
> >> Sent from the Drools: User forum mailing list archive at
> Nabble.com.
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users at .jboss
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
> > --
> > With kind regards,
> > Geoffrey De Smet
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at .jboss
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Planner-has-trouble-creating-a-configurer-how-to-debug-tp3695307p3699291.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org <mailto:rules-users at lists.jboss.org>
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
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--
With kind regards,
Geoffrey De Smet
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