[rules-users] Listen event in different package
Hello
I am a beginner in Drools 5.1.1 and try to listen a event in a packageX
inserted by a rule in another packageY.
I have following 2 drl file :
---inserter.drl----
package packageY
import internal.event.*;
declare EventItem
@role (event)
end
rule "insert EventItem"
when
...
then
EventItem ei = new EventItem(...);
insert(ei);
end
----------------
---listener.drl---
package packageX
import internal.event.*;
rule "listen EventItem temporal constraint"
when
ei: EventItem()
oi: OtherItem(this after ei)
then
System.out.println("Hello word");
end
----------------
EventItem and OtherItem are defined in 'internal.event' package.
If I run with a StatefulKnowledgeSession configured in 'pseudo clock',
I have following stack trace:
java.lang.ClassCastException: org.drools.common.DefaultFactHandle
cannot be cast to org.drools.common.EventFactHandle
at
org.drools.base.evaluators.AfterEvaluatorDefinition$AfterEvaluator.evaluateCachedRight(AfterEvaluatorDefinition.java:322)
at
org.drools.rule.VariableRestriction.isAllowedCachedRight(VariableRestriction.java:117)
at
org.drools.rule.VariableConstraint.isAllowedCachedRight(VariableConstraint.java:121)
at
org.drools.common.SingleBetaConstraints.isAllowedCachedRight(SingleBetaConstraints.java:151)
at org.drools.reteoo.JoinNode.assertObject(JoinNode.java:125)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:190)
at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:145)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1174)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1123)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:917)
at
org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:251)
...
Moving listener.drl in packageY, all works.
I don't know if it is already open a related issue, perhaps the :
https://issues.jboss.org/browse/JBRULES-2774
Thanks for your attention.
Regards.
Marco Malziotti
Tecnologie nelle Reti e nei Sistemi T.R.S. S.p.A.
Integration Test Engineer
Tel. + 39 06.87281.407
Fax. + 39 06.87281.550
E-mail: marco.malziotti(a)trs.it
Tecnologie nelle Reti e nei Sistemi T.R.S. SpA
Via della Bufalotta, 378 - 00139 Roma
Tel +39.06.87.28.1.1 - Fax +39.06.87.28.1.550
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