2:56 p.m.
Hi again ...
I would like to insert a new generated object into the knowledge base.
It seems that
insert (new Watcher())
is working. But
Watcher watcher = new Watcher();
insert (watcher);
isn't working?
Why?
Thank you for any explanations. :)
Tina
3 p.m.
can you explain what isn't working? can you share the error with us??
where are you doing the insert?in the RHS?
On Thu, Aug 12, 2010 at 4:56 PM, Tina Vießmann <tviessmann(a)stud.hs-bremen.de
wrote:
Hi again ...
I would like to insert a new generated object into the knowledge base.
It seems that
insert (new Watcher())
is working. But
Watcher watcher = new Watcher();
insert (watcher);
isn't working?
Why?
Thank you for any explanations. :)
Tina
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rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
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- MyJourney @ http://salaboy.wordpress.com
- Co-Founder @ http://www.jbug.com.ar
- Salatino "Salaboy" Mauricio -
5:31 p.m.
I've forgot to attach the error message. I'm sorry.
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
org.drools.myexample.KnowledgeBaseManager.activate(KnowledgeBaseManager.java:75)
at org.drools.myexample.Main.main(Main.java:51)
Caused by: java.lang.NullPointerException
at
org.drools.base.evaluators.AfterEvaluatorDefinition$AfterEvaluator.evaluateCachedLeft(AfterEvaluatorDefinition.java:346)
at
org.drools.rule.VariableRestriction.isAllowedCachedLeft(VariableRestriction.java:109)
at
org.drools.rule.VariableConstraint.isAllowedCachedLeft(VariableConstraint.java:106)
at
org.drools.common.TripleBetaConstraints.isAllowedCachedLeft(TripleBetaConstraints.java:205)
at org.drools.reteoo.JoinNode.assertLeftTuple(JoinNode.java:114)
at
org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:117)
at
org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:78)
at
org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:142)
at
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:360)
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:344)
at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:185)
at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:146)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1046)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1001)
at
org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:114)
at
org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:108)
at
org.drools.myexample.rules.Rule_Insert_Watcher_Into_Knowledge_Base_0.consequence(Rule_Insert_Watcher_Into_Knowledge_Base_0.java:16)
at
org.drools.myexample.rules.Rule_Insert_Watcher_Into_Knowledge_Base_0ConsequenceInvoker.evaluate(Rule_Insert_Watcher_Into_Knowledge_Base_0ConsequenceInvoker.java:18)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:934)
... 7 more
13.08.2010 00:26:47 org.apache.activemq.ActiveMQMessageConsumer dispatch
Exception while processing message: java.lang.NullPointerException
java.lang.NullPointerException
at
org.drools.base.extractors.BaseObjectClassFieldReader.getLongValue(BaseObjectClassFieldReader.java:136)
at
org.drools.base.ClassFieldReader.getLongValue(ClassFieldReader.java:171)
at
org.drools.base.evaluators.AfterEvaluatorDefinition$AfterEvaluator.evaluateCachedRight(AfterEvaluatorDefinition.java:323)
at
org.drools.rule.VariableRestriction.isAllowedCachedRight(VariableRestriction.java:116)
at
org.drools.rule.VariableConstraint.isAllowedCachedRight(VariableConstraint.java:112)
at
org.drools.common.TripleBetaConstraints.isAllowedCachedRight(TripleBetaConstraints.java:216)
at org.drools.reteoo.JoinNode.assertObject(JoinNode.java:172)
at
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:360)
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:344)
at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:185)
at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:146)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1046)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1001)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:788)
at
org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:216)
at
org.drools.myexample.KnowledgeBaseManager.addEvent(KnowledgeBaseManager.java:55)
at org.drools.myexample.Main.insertEvent(Main.java:65)
at
org.drools.myexample.jms.PublisherListener.onMessage(PublisherListener.java:40)
at
org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1204)
at
org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131)
at
org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202)
at
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:122)
at
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:43)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Am 12.08.2010 22:00, schrieb Mauricio Salatino:
can you explain what isn't working? can you share the error with
us??
where are you doing the insert?in the RHS?
On Thu, Aug 12, 2010 at 4:56 PM, Tina Vießmann
<tviessmann(a)stud.hs-bremen.de <mailto:tviessmann@stud.hs-bremen.de>>
wrote:
Hi again ...
I would like to insert a new generated object into the knowledge base.
It seems that
insert (new Watcher())
is working. But
Watcher watcher = new Watcher();
insert (watcher);
isn't working?
Why?
Thank you for any explanations. :)
Tina
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org>
https://lists.jboss.org/mailman/listinfo/rules-users
--
- CTO @ http://www.plugtree.com
- MyJourney @ http://salaboy.wordpress.com
- Co-Founder @ http://www.jbug.com.ar
- Salatino "Salaboy" Mauricio -
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
6:14 p.m.
Hi Tina,
Can you provide a test case?
Edson
2010/8/12 Tina Vießmann <tviessmann(a)stud.hs-bremen.de>
Hi again ...
I would like to insert a new generated object into the knowledge base.
It seems that
insert (new Watcher())
is working. But
Watcher watcher = new Watcher();
insert (watcher);
isn't working?
Why?
Thank you for any explanations. :)
Tina
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
--
Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
5:34 a.m.
Hi Edson,
I can't provide a test case. But I've figured out what the exception are
about. It's not about the code I've posted before. It's about the
exceptions that the java.util.Set.add() method throws. I've attached the
concerned code at the end.
That means for me I have to manage the exception handling. I've tried to
google the topic. The best I came up with is a mailing list entry:
http://drools-java-rules-engine.46999.n3.nabble.com/Exception-handling-po...
Would that be the correct solution? If yes, how do I implement the
handler? I would be thankful for a code example.
The code that the exception references is:
declare Watcher
@role ( event )
triggeringValue : Value
numberOfContainedValues : int
valueSet : Set // Set<Value>
end
// ....
function Watcher generateWatcherEvent(Value firstValue) {
Watcher watcher = new Watcher();
watcher.setNumberOfContainedValues(1);
watcher.setTriggeringValue(firstValue);
// add value to set
Set set = watcher.getValueSet();
set.add(firstValue);
watcher.setValueSet(set);
return watcher;
}
Thanks for your help! :)
Tina
Am 13.08.2010 01:14, schrieb Edson Tirelli:
Hi Tina,
Can you provide a test case?
Edson
2010/8/12 Tina Vießmann <tviessmann(a)stud.hs-bremen.de
<mailto:tviessmann@stud.hs-bremen.de>>
Hi again ...
I would like to insert a new generated object into the knowledge base.
It seems that
insert (new Watcher())
is working. But
Watcher watcher = new Watcher();
insert (watcher);
isn't working?
Why?
Thank you for any explanations. :)
Tina
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org>
https://lists.jboss.org/mailman/listinfo/rules-users
--
Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com <http://www.jboss.com>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
7 a.m.
This is not an issue of exception handling.
If you use "declare" you'll have to initialize all collection-typed fields
properly
before you can call any methods, e.g.
Set set = new HashSet<?>()
watcher.setValueSet( set );
set.add(...)
-W
2010/8/13 Tina Vießmann <tviessmann(a)stud.hs-bremen.de>
Hi Edson,
I can't provide a test case. But I've figured out what the exception are
about. It's not about the code I've posted before. It's about the exceptions
that the java.util.Set.add() method throws. I've attached the concerned code
at the end.
That means for me I have to manage the exception handling. I've tried to
google the topic. The best I came up with is a mailing list entry:
http://drools-java-rules-engine.46999.n3.nabble.com/Exception-handling-po...
Would that be the correct solution? If yes, how do I implement the handler?
I would be thankful for a code example.
The code that the exception references is:
declare Watcher
@role ( event )
triggeringValue : Value
numberOfContainedValues : int
valueSet : Set // Set<Value>
end
// ....
function Watcher generateWatcherEvent(Value firstValue) {
Watcher watcher = new Watcher();
watcher.setNumberOfContainedValues(1);
watcher.setTriggeringValue(firstValue);
// add value to set
Set set = watcher.getValueSet();
set.add(firstValue);
watcher.setValueSet(set);
return watcher;
}
Thanks for your help! :)
Tina
Am 13.08.2010 01:14, schrieb Edson Tirelli:
Hi Tina,
Can you provide a test case?
Edson
2010/8/12 Tina Vießmann <tviessmann(a)stud.hs-bremen.de>
> Hi again ...
>
> I would like to insert a new generated object into the knowledge base.
> It seems that
> insert (new Watcher())
> is working. But
> Watcher watcher = new Watcher();
> insert (watcher);
> isn't working?
>
> Why?
>
> Thank you for any explanations. :)
>
> Tina
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
--
Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
_______________________________________________
rules-users mailing
listrules-users@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
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7:20 a.m.
Thank you so much, Wolfgang. :)
I'm so sorry. I don't know why I'm kind of forgetting all of Java while
using Drools.
[Topic solved]
Tina
This is not an issue of exception handling.
If you use "declare" you'll have to initialize all collection-typed
fields properly
before you can call any methods, e.g.
Set set = new HashSet<?>()
watcher.setValueSet( set );
set.add(...)
-W
2010/8/13 Tina Vießmann <tviessmann(a)stud.hs-bremen.de
<mailto:tviessmann@stud.hs-bremen.de>>
Hi Edson,
I can't provide a test case. But I've figured out what the
exception are about. It's not about the code I've posted before.
It's about the exceptions that the java.util.Set.add() method
throws. I've attached the concerned code at the end.
That means for me I have to manage the exception handling. I've
tried to google the topic. The best I came up with is a mailing
list entry:
http://drools-java-rules-engine.46999.n3.nabble.com/Exception-handling-po...
Would that be the correct solution? If yes, how do I implement the
handler? I would be thankful for a code example.
The code that the exception references is:
declare Watcher
@role ( event )
triggeringValue : Value
numberOfContainedValues : int
valueSet : Set // Set<Value>
end
// ....
function Watcher generateWatcherEvent(Value firstValue) {
Watcher watcher = new Watcher();
watcher.setNumberOfContainedValues(1);
watcher.setTriggeringValue(firstValue);
// add value to set
Set set = watcher.getValueSet();
set.add(firstValue);
watcher.setValueSet(set);
return watcher;
}
Thanks for your help! :)
Tina
Am 13.08.2010 01:14, schrieb Edson Tirelli:
> Hi Tina,
>
> Can you provide a test case?
>
> Edson
>
> 2010/8/12 Tina Vießmann <tviessmann(a)stud.hs-bremen.de
> <mailto:tviessmann@stud.hs-bremen.de>>
>
> Hi again ...
>
> I would like to insert a new generated object into the
> knowledge base.
> It seems that
> insert (new Watcher())
> is working. But
> Watcher watcher = new Watcher();
> insert (watcher);
> isn't working?
>
> Why?
>
> Thank you for any explanations. :)
>
> Tina
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org>
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
>
> --
> Edson Tirelli
> JBoss Drools Core Development
> JBoss by Red Hat @ www.jboss.com <http://www.jboss.com>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org>
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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https://lists.jboss.org/mailman/listinfo/rules-users
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5219
days inactive
5220
days old
6 comments
4 participants
participants (4)
-
Edson Tirelli -
Mauricio Salatino -
Tina Vießmann -
Wolfgang Laun