Hi,
It says that the $param is null so $param.name() cannot be called
regards
Nicolas
2010/2/10 Glenn Macgregor <gmacgre...@pocketkings.ie>
> Hi All,
>
>
>
> I have a simple CEP test case which I am working through. I am currently
> getting a NullPointerException in the Consequence and have no idea why.
>
>
>
> *Rule:
> **rule* "Param Update Event Rule"
>
> *when*
>
> $pue : ParameterUpdateEvent(name == "testParam2", $param :
> param) *from* entry-point "ParamUpdateStream"
>
> *then*
>
> #System.out.println("Param '" + $pue.getName() + "' has been
> updated to " + $pue.getValue());
>
> System.out.println("HERE!!! " + $param + " " + $param.name());
>
> *End*
>
> * *
>
> *Exception & Debug:*
>
> OBJECT ASSERTED
> value:ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@1265109factid:
> 2
>
> OBJECT RETRACTED
> value:ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@1265109factid:
> 2
>
> OBJECT ASSERTED
> value:ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@5e8d7dfactid:
> 3
>
> OBJECT RETRACTED
> value:ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@5e8d7dfactid:
> 3
>
> ACTIVATION CREATED rule:Param Update Event Rule activationId:Param Update
> Event Rule [4, 0] declarations:
> $pue=ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@19b4748(4);
> $param=ie.pocketkings.systemsmanagement.alerting.parame...@2431b9(4)
>
> Exception in thread "Thread-3" BEFORE ACTIVATION FIRED rule:Param Update
> Event Rule activationId:Param Update Event Rule [4, 0] declarations:
> $pue=ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@19b4748(4);
> $param=ie.pocketkings.systemsmanagement.alerting.parame...@2431b9(4)
>
> OBJECT RETRACTED
> value:ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@19b4748factid:
> 4
>
> OBJECT ASSERTED
> value:ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@19b4748factid:
> -1
>
> *org.drools.runtime.rule.ConsequenceException*: *
> java.lang.NullPointerException*
>
> at
> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(
> *DefaultConsequenceExceptionHandler.java:23*)
>
> at org.drools.common.DefaultAgenda.fireActivation(*
> DefaultAgenda.java:943*)
>
> at org.drools.common.DefaultAgenda.fireNextItem(*
> DefaultAgenda.java:885*)
>
> at org.drools.common.DefaultAgenda.fireUntilHalt(*
> DefaultAgenda.java:1065*)
>
> at org.drools.common.AbstractWorkingMemory.fireUntilHalt(*
> AbstractWorkingMemory.java:701*)
>
> at org.drools.common.AbstractWorkingMemory.fireUntilHalt(*
> AbstractWorkingMemory.java:678*)
>
> at org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(*
> StatefulKnowledgeSessionImpl.java:195*)
>
> at ie.PocketKings.SystemsManagement.Alerting.SessionRunner.run(*
> SessionRunner.java:13*)
>
> at java.lang.Thread.run(Unknown Source)
>
> Caused by: *java.lang.NullPointerException*
>
> at
> org.drools.base.ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent6011238$getParam.getValue(Unknown
> Source)
>
> at org.drools.base.ClassFieldReader.getValue(*
> ClassFieldReader.java:91*)
>
> at org.drools.rule.Declaration.getValue(*Declaration.java:244*)
>
> at
> ie.PocketKings.SystemsManagement.Alerting.Rule_Param_Update_Event_Rule_0ConsequenceInvoker.evaluate(
> *Rule_Param_Update_Event_Rule_0ConsequenceInvoker.java:16*)
>
> at org.drools.common.DefaultAgenda.fireActivation(*
> DefaultAgenda.java:934*)
>
> ... 7 more
>
> OBJECT ASSERTED
> value:ie.pocketkings.systemsmanagement.alerting.parameterupdateev...@19fdbcbfactid:
> 5
>
>
>
>
>
> Could it be that my Event object is getting destroyed before the
> consequence is run, is that what “OBJECT RETRACKED” means in this case?
>
>
>
> Thanks
>
>
>
> Glenn
>
>
>
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