12:13 p.m.
This is a regression bug. InitialFact should not be shadowed. Can you
please open a JIRA for that?
Thank you
Edson
2007/8/15, Anh Vuong <anhtvuong(a)yahoo.com>:
Thanks for your help, Edson.
collect works in my simple test now, but not when I integrate with my
code. Is there an easy way to debug LHS to see if collect stmt is
evaluated? I notice IllegalAccessError
since my app will load a selected list of jars upfront, so my questions
are:
1) Can this error break collect?
2) How can I fix this error still using our own classLoader?
Here is the stack trace:
2007 Aug 15, 09:08:13:193 Exception IllegalAccessError
java.lang.IllegalAccessError: class
org.drools.reteoo.InitialFactImplShadowProxy cannot access its superclass
org.drools.reteoo.Init
ialFactImpl
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at org.drools.rule.MapBackedClassLoader.fastFindClass(
MapBackedClassLoader.java:60)
at org.drools.rule.MapBackedClassLoader.loadClass(
MapBackedClassLoader.java:79)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.drools.reteoo.Rete$ObjectTypeConf.loadOrGenerateProxy(
Rete.java:379)
at org.drools.reteoo.Rete$ObjectTypeConf.defineShadowProxyData(
Rete.java:344)
at org.drools.reteoo.Rete$ObjectTypeConf.<init>(Rete.java:320)
at org.drools.reteoo.Rete.assertObject(Rete.java:145)
at org.drools.reteoo.ReteooRuleBase.assertObject(
ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute
(ReteooWorkingMemory.java:163)
at org.drools.common.AbstractWorkingMemory.executeQueuedActions(
AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:623)
Thanks,
-av
*Edson Tirelli <tirelli(a)post.com>* wrote:
No single simple answer here. You need to check what would better fit
your use case.
The thing is: it is not possible to limit the number of matches to a
collect statement... all matching instances WILL match it and be collected.
No really "clean" way I can think about, but a few possible options
(haven't executed them, but shall work):
1. Simply execute the actions multiple times in the consequence:
when
eventList : LinkedList( $size : size >= 5 ) from collect( Event(text
matches ".*rule5.*" ))
*then
for( int i = 0; i < $size/5; i++ )
*
System.out.println("rule5 is fired " + eventList.size ());
end
2. Flag used facts:
when
eventList : LinkedList( size >= 5 ) from collect( Event(text matches
".*rule5.*", processed == false ))
*then
* System.out.println("rule5 is fired " + eventList.size());
* for( int i = 0; i < 5; i++ ) {
Event e = **(Event) eventList.get ( i );**
e.setProcessed( true );
update( e );
*
}
end
2. Retract used facts:
when
eventList : LinkedList( size >= 5 ) from collect( Event(text matches
".*rule5.*" ))
*then
* System.out.println("rule5 is fired " + eventList.size());
* for( int i = 0; i < 5; i++ ) {
Event e = **(Event) eventList.get( i );* *
retract( e );
*
}
end
Hope it helps.
Edson
2007/8/10, Anh Vuong <anhtvuong(a)yahoo.com>:
>
> Hi,
> I'd like to use keyword collect to do my filtering but its behaviour
> confused me, please advise. I greatly appreciate your help.
>
> Problem 1:
>
> when
> eventList : LinkedList(size == 5)
> from collect( Event(text matches
> ".*rule5.*" ))
> *then* System.out.println(
> "rule5 is fired " + eventList.size());
> I still do not see any log msg after adding 5+ events. Is something
> wrong with my rule?
>
> Problem 2:
>
> when
> event: Event(text matches ".*rule5.*" ))
> eventList : LinkedList(size == 5)
> from collect( Event(text == event.text)
> *then * System.out.println(
> "rule5 is fired " + eventList.size());
> After adding 5 events, I see 5 log msg instead of one as I'd expect.
> If I add more events, I will see more log. How do I tell LHS to reset
> the count from 0.
> Basically, I want to take 1 event out of 5 similar events (suppressing
> filtering). So if there are 10 similar events, my RHS should activate 2
> times, not 10 times.
>
> Thanks,
> -av
>
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--
Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @
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Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com