12:52 p.m.
Hi Nicolas,
Thanks for the response. The strange thing is I do not get this error when I run inside
the debugger with the same facts. This made me believe it is a timing issue. I am using
the latest stable drools - 5.0.1
Thanks
Glenn
________________________________
From: rules-users-bounces(a)lists.jboss.org
To: Rules Users List
Sent: Wed Feb 10 18:18:57 2010
Subject: Re: [rules-users] CEP Error
Hi,
It says that the $param is null so $param.name<http://param.name>() cannot be
called
regards
Nicolas
2010/2/10 Glenn Macgregor
<gmacgregor@pocketkings.ie<mailto:gmacgregor@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<http://param.name>());
End
Exception & Debug:
OBJECT ASSERTED
value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109 factId: 2
OBJECT RETRACTED
value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109 factId: 2
OBJECT ASSERTED
value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7d factId: 3
OBJECT RETRACTED
value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7d factId: 3
ACTIVATION CREATED rule:Param Update Event Rule activationId:Param Update Event Rule [4,
0] declarations:
$pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4);
$param=ie.PocketKings.SystemsManagement.Alerting.Parameter@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.ParameterUpdateEvent@19b4748(4);
$param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4)
OBJECT RETRACTED
value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748 factId: 4
OBJECT ASSERTED
value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748 factId: -1
org.drools.runtime.rule.ConsequenceException: java.lang.NullPointerException
at
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:943)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:885)
at org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1065)
at
org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:701)
at
org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:678)
at
org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(StatefulKnowledgeSessionImpl.java:195)
at
ie.PocketKings.SystemsManagement.Alerting.SessionRunner.run(SessionRunner.java:13)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at
org.drools.base.ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent6011238$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.ParameterUpdateEvent@19fdbcb factId: 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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rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org>
https://lists.jboss.org/mailman/listinfo/rules-users
1:40 p.m.
New subject: CEP Error
Hi Glenn,
If I remember well, calling a method with no parameter gives that error, it
is a MVEL pb.
You should try with latest trunk version where it is supposed to be fixed.
Regards
Nicolas
2010/2/10 Glenn Macgregor <gmacgregor(a)pocketkings.ie>
Hi Nicolas,
Thanks for the response. The strange thing is I do not get this error when
I run inside the debugger with the same facts. This made me believe it is a
timing issue. I am using the latest stable drools - 5.0.1
Thanks
Glenn
------------------------------
*From*: rules-users-bounces(a)lists.jboss.org
*To*: Rules Users List
*Sent*: Wed Feb 10 18:18:57 2010
*Subject*: Re: [rules-users] CEP Error
Hi,
It says that the $param is null so $param.name() cannot be called
regards
Nicolas
2010/2/10 Glenn Macgregor <gmacgregor(a)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.ParameterUpdateEvent@1265109factId:
2
>
> OBJECT RETRACTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109factId:
2
>
> OBJECT ASSERTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7dfactId: 3
>
> OBJECT RETRACTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7dfactId: 3
>
> ACTIVATION CREATED rule:Param Update Event Rule activationId:Param Update
> Event Rule [4, 0] declarations:
> $pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4);
> $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@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.ParameterUpdateEvent@19b4748(4);
> $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4)
>
> OBJECT RETRACTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748factId:
4
>
> OBJECT ASSERTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748factId:
-1
>
> *org.drools.runtime.rule.ConsequenceException*: *
> java.lang.NullPointerException*
>
> at
> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(
> *DefaultConsequenceExceptionHandler.java:23*)
>
> at org.drools.common.DefaultAgenda.fireActivation(*
> DefaultAgenda.java:943*)
>
> at org.drools.common.DefaultAgenda.fireNextItem(*
> DefaultAgenda.java:885*)
>
> at org.drools.common.DefaultAgenda.fireUntilHalt(*
> DefaultAgenda.java:1065*)
>
> at org.drools.common.AbstractWorkingMemory.fireUntilHalt(*
> AbstractWorkingMemory.java:701*)
>
> at org.drools.common.AbstractWorkingMemory.fireUntilHalt(*
> AbstractWorkingMemory.java:678*)
>
> at org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(*
> StatefulKnowledgeSessionImpl.java:195*)
>
> at ie.PocketKings.SystemsManagement.Alerting.SessionRunner.run(*
> SessionRunner.java:13*)
>
> at java.lang.Thread.run(Unknown Source)
>
> Caused by: *java.lang.NullPointerException*
>
> at
>
org.drools.base.ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent6011238$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.ParameterUpdateEvent@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
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
1:41 p.m.
New subject: CEP Error
Hi again,
if you want to show the attribute name just do $param.name, there is no need
for ()
If it is a method, put a dummy parameter
Regards
Nicolas
2010/2/10 Glenn Macgregor <gmacgregor(a)pocketkings.ie>
Hi Nicolas,
Thanks for the response. The strange thing is I do not get this error when
I run inside the debugger with the same facts. This made me believe it is a
timing issue. I am using the latest stable drools - 5.0.1
Thanks
Glenn
------------------------------
*From*: rules-users-bounces(a)lists.jboss.org
*To*: Rules Users List
*Sent*: Wed Feb 10 18:18:57 2010
*Subject*: Re: [rules-users] CEP Error
Hi,
It says that the $param is null so $param.name() cannot be called
regards
Nicolas
2010/2/10 Glenn Macgregor <gmacgregor(a)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.ParameterUpdateEvent@1265109factId:
2
>
> OBJECT RETRACTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109factId:
2
>
> OBJECT ASSERTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7dfactId: 3
>
> OBJECT RETRACTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7dfactId: 3
>
> ACTIVATION CREATED rule:Param Update Event Rule activationId:Param Update
> Event Rule [4, 0] declarations:
> $pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4);
> $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@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.ParameterUpdateEvent@19b4748(4);
> $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4)
>
> OBJECT RETRACTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748factId:
4
>
> OBJECT ASSERTED
> value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748factId:
-1
>
> *org.drools.runtime.rule.ConsequenceException*: *
> java.lang.NullPointerException*
>
> at
> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(
> *DefaultConsequenceExceptionHandler.java:23*)
>
> at org.drools.common.DefaultAgenda.fireActivation(*
> DefaultAgenda.java:943*)
>
> at org.drools.common.DefaultAgenda.fireNextItem(*
> DefaultAgenda.java:885*)
>
> at org.drools.common.DefaultAgenda.fireUntilHalt(*
> DefaultAgenda.java:1065*)
>
> at org.drools.common.AbstractWorkingMemory.fireUntilHalt(*
> AbstractWorkingMemory.java:701*)
>
> at org.drools.common.AbstractWorkingMemory.fireUntilHalt(*
> AbstractWorkingMemory.java:678*)
>
> at org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(*
> StatefulKnowledgeSessionImpl.java:195*)
>
> at ie.PocketKings.SystemsManagement.Alerting.SessionRunner.run(*
> SessionRunner.java:13*)
>
> at java.lang.Thread.run(Unknown Source)
>
> Caused by: *java.lang.NullPointerException*
>
> at
>
org.drools.base.ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent6011238$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.ParameterUpdateEvent@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
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
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5403
days inactive
5403
days old
2 comments
2 participants
participants (2)
-
Glenn Macgregor -
Nicolas Héron