Re: [rules-users] Apply role to whole class hierarchy

2012-07-30 Thread Joerg Henne
After some debugging I was able to shed some light on what causes the
problem, even if I don't fully understand it. The problem is produced by the
event base class, which is declared with @role(event), i.e. (VSCPEvent)
living in a different package than the ButtonEvent. If I move then into the
same package, everything works just fine.
The two package instances are merged in PackageBuilder.mergePackage(...),
but the RuleBuilder still seems to operate on two separate instances, one
with the declarations and Package.isEvent(...) returning true for the
ButtonEvent and the other without them. Unfortunately, as I know too little
about the workings of the various builders, I can't provide you with a
ready-made idea of how to fix the problem.

See https://issues.jboss.org/browse/JBRULES-3587

Thanks
Joerg



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Re: [rules-users] Apply role to whole class hierarchy

2012-07-27 Thread Joerg Henne
Thanks for your help, Edson!

We are using drools 5.4.0.Final via maven. 

Maybe I am missing something, so here's a quick overview of what we do. We
have a model class ButtonEvent which is derived like this: 
ButtonEvent -> ZonedEvent -> VSCPEvent

Then there's a rulebase with something like this:

import test.vscp.VSCPEvent;
import test.vscp.information.ButtonEvent;

declare VSCPEvent
@role( event )
@timestamp( timestamp )
@expires( 1h )
end
declare ButtonEvent
@role( event )
@timestamp( timestamp )
@expires( 1h )
end

rule "Button long pressed"
when
b : ButtonEvent( action == Action.PRESSED )
not( ButtonEvent( action == Action.RELEASED, this after[0s,1s] b ) )
then
...
end

What I would have expected is that the second 'declare' statement to be
unnecessary. However, if I take it away, this is what I get:

java.lang.ClassCastException: org.drools.common.DefaultFactHandle
at
org.drools.base.evaluators.AfterEvaluatorDefinition$AfterEvaluator.evaluateCachedRight(AfterEvaluatorDefinition.java:316)
at
org.drools.rule.constraint.EvaluatorConstraint.isAllowedCachedRight(EvaluatorConstraint.java:80)
at
org.drools.common.SingleBetaConstraints.isAllowedCachedRight(SingleBetaConstraints.java:139)
at org.drools.reteoo.NotNode.assertObject(NotNode.java:133)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:141)
at
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
at 
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
at 
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:337)
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:298)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:888)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847)
at
org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269)
...

Thanks
Joerg





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[rules-users] Apply role to whole class hierarchy

2012-07-26 Thread Joerg Henne
Hi all,

we are processing events through a Fusion rule base. To be recognized as
such, model classes must be declared as @role(event). We are using a rather
extensive hierarchy of events, all derived from a single abstract class.
Unfortunately, it doesn't seem to be possible to declare just this base
class as an event and have the 'event' role for the others derived from
that.
Is there a way around having to declare each and every single event class
separately?

Thanks
Joerg



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