[rules-users] Planner has trouble creating a configurer: how to debug

[aitchnyu]

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
> 


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