[rules-users] How to get handle to stateful session in rule RHS ?
Hi all, I need to retract events from StatefulKnowledgeSession in rule's consequences section. How do I get a handle to the session in rule's RHS ? When I get this session handle I will try to use its retract method: void retract(FactHandle handle) (which is derived from WorkingMemoryEntryPoint interface) to remove the event which caused the rule to fire. thanks, Esko -- Esko Hujanen http://www.ebsolut.fi -- View this message in context: http://drools.46999.n3.nabble.com/How-to-get-handle-to-stateful-session-in-rule-RHS-tp3332730p3332730.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to get handle to stateful session in rule RHS ?
Usually you don't need this; a plain retract( $boundToEventFact ); is sufficient. -W On 13 September 2011 16:16, eskomk esko.huja...@ebsolut.fi wrote: Hi all, I need to retract events from StatefulKnowledgeSession in rule's consequences section. How do I get a handle to the session in rule's RHS ? When I get this session handle I will try to use its retract method: void retract(FactHandle handle) (which is derived from WorkingMemoryEntryPoint interface) to remove the event which caused the rule to fire. thanks, Esko -- Esko Hujanen http://www.ebsolut.fi -- View this message in context: http://drools.46999.n3.nabble.com/How-to-get-handle-to-stateful-session-in-rule-RHS-tp3332730p3332730.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to get handle to stateful session in rule RHS ?
Subsection The Right Hand Side (then) of the Expert manual explains some details about the implicit variables. E.g.: kcontext.getKnowledgeRuntime() -W On 13 September 2011 16:16, eskomk esko.huja...@ebsolut.fi wrote: Hi all, I need to retract events from StatefulKnowledgeSession in rule's consequences section. How do I get a handle to the session in rule's RHS ? When I get this session handle I will try to use its retract method: void retract(FactHandle handle) (which is derived from WorkingMemoryEntryPoint interface) to remove the event which caused the rule to fire. thanks, Esko -- Esko Hujanen http://www.ebsolut.fi -- View this message in context: http://drools.46999.n3.nabble.com/How-to-get-handle-to-stateful-session-in-rule-RHS-tp3332730p3332730.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to get handle to stateful session in rule RHS ?
Hi laune / W Thanks, the plain retract seems to do the trick. and thanks also for pointing me to right direction, I must dig in more in the doc ;) cheers, Esko -- Esko Hujanen http://www.ebsolut.fi -- View this message in context: http://drools.46999.n3.nabble.com/How-to-get-handle-to-stateful-session-in-rule-RHS-tp3332730p3332887.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Call a Drools application
Are the drools libs also in the classpath of your application when you run it externally as they appear to be when you run in eclipse? -- View this message in context: http://drools.46999.n3.nabble.com/Call-a-Drools-application-tp3332048p138.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Call a Drools application
Whether they are in the classpath is a choice made by the developer of your application. Whether they need to be in the classpath is another question, to which I would answer yes. Chapter 3. Installation and Setup of droolsjbpm-introduction-docs.pdf in the binaries folder of the download gives more details. With kind regards, Mike On 13 September 2011 17:33, John jfull...@progeny.net wrote: Are the drools libs also in the classpath of your application when you run it externally as they appear to be when you run in eclipse? -- View this message in context: http://drools.46999.n3.nabble.com/Call-a-Drools-application-tp3332048p138.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Problem evaluating with Enum
I have encountered the following problem using enums in drools.
I have an enum defined called ETimeConstraint, something of the sort:
public enum ETimeConstraint {
NO_CONSTRAINT,
TODAY,
TOMORROW,
;
}
Now I wish to filter sentences which reside in the working memory based on a
time constraint which is of this enum type.
I created the following test rule
rule My Test
when
$sentences: ArrayList()
from collect (IPhoneSentences.Sentence(
descriptor contains ETimeConstraint
))
then
//something
end
this does not work meaning no sentence are selected although I know that
there are sentences in the working memory.
but when I add ETimeConstraint.name it does:
rule My Test
when
$sentences: ArrayList()
from collect (IPhoneSentences.Sentence(
descriptor contains ETimeConstraint.name
))
then
//something
end
I can stick to this workaround but it becomes very problematic to work this
way. Furthermore once I wish to define a variable for example defining
$timeConstraint :
rule My Test
when
$cm: Condition(
$timeConstraint:
contextIntention,
)
$sentences: ArrayList()
from collect (IPhoneSentences.Sentence(
descriptor contains $timeConstraint
))
then
//something
end
this will not work because I can't put $timeConstraint.name
any suggestions?
I am running:
- Drools 5.2.0
- Eclipse Helios
- JBoss 5.1.0
Thanks
Hezi
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Re: [rules-users] Memory leak in 5.2/5.3
we are seeing similar memory leak with 5.2.0.Cr1 version of drools.
are there any other alternatives such as using a different version of jbpm
jar if that is the cause of the problem?
we are currently using the jbpm-flow-5.1.0.Cr1.jar.
If not,
is there a method that removes all the facts from the ksession so that it
can be reused?
for ex, the existing code (simplified) is as follows:
ksession = knowledgeBase.newStatefulKnowledgeSession();
for (Object obj : objList)
{
ksession.insert(obj);
}
ksession.startProcess(ruleFlowProcessName);
ksession.fireAllRules();
do some response processing here
ksession.dispose();
Thomas,
Can you please elaborate on what you did to clean out the facts from the
memory ?
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Re: [rules-users] Problem evaluating with Enum
If the attribute IPhoneSentences.Sentence.descriptor is a
CollectionETimeConstraint then this makes perfect sense. The elements are
instances of ETimeConstraint (what your second rule tests for) not instances of
the enum class definition ETimeConstraint. (what your first rule tests
for...maybe...) However, I'm wondering why the first version of the My Test
rule compiles at all. It doesn't when I try it.
--- On Tue, 9/13/11, Hezi Stern he...@delegatecom.com wrote:
From: Hezi Stern he...@delegatecom.com
Subject: [rules-users] Problem evaluating with Enum
To: rules-users@lists.jboss.org
Date: Tuesday, September 13, 2011, 3:54 PM
I have encountered the following problem using enums in drools. I have an enum
defined called ETimeConstraint, something of the sort: public enum
ETimeConstraint { NO_CONSTRAINT, TODAY,TOMORROW,;} Now I wish to
filter sentences which reside in the working memory based on a time constraint
which is of this enum type.I created the following test rule rule My Test
when
$sentences: ArrayList() from collect
(IPhoneSentences.Sentence(
descriptor contains ETimeConstraint
)) then //somethingend
this does not work meaning no sentence are selected although I know that there
are sentences in the working memory. but when I add ETimeConstraint.name it
does: rule My Test when
$sentences: ArrayList()
from collect (IPhoneSentences.Sentence(
descriptor contains ETimeConstraint.name
))
then
//somethingend I can stick to this workaround but it becomes very problematic
to work this way. Furthermore once I wish to define a variable for example
defining $timeConstraint : rule My Test
when
$cm: Condition(
$timeConstraint: contextIntention,
)
$sentences: ArrayList() from collect
(IPhoneSentences.Sentence(
descriptor
contains $timeConstraint
)) then //somethingend this will not work
because I can’t put $timeConstraint.name any suggestions? I am
running:- Drools 5.2.0- Eclipse Helios - JBoss 5.1.0
ThanksHezi
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Re: [rules-users] Problem evaluating with Enum
ETimeConstraint is a (Java) identifier, for the enum type. There is no
way this can be contains-ed in any collection.
ETimeConstraint.name isn't any proper way of accessing anything in
connection with enum type ETimeConstraint.
Correct would be
descriptor contains ETimeConstraint.TODAY
and, provided that contextIntention is of type ETimeConstraint, so is
$cm: Condition( $timeConstraint: contextIntention )
$sentences: ArrayList() from
collect (IPhoneSentences.Sentence(descriptor contains $timeConstraint
Notice that a ListObject descriptor could contain
ETimeConstraint.TODAY.name()
which is a String value.
-W
2011/9/13 Hezi Stern he...@delegatecom.com:
I have encountered the following problem using enums in drools.
I have an enum defined called ETimeConstraint, something of the sort:
public enum ETimeConstraint {
NO_CONSTRAINT,
TODAY,
TOMORROW,
;
}
Now I wish to filter sentences which reside in the working memory based on a
time constraint which is of this enum type.
I created the following test rule
rule My Test
when
$sentences: ArrayList()
from collect (IPhoneSentences.Sentence(
descriptor contains ETimeConstraint
))
then
//something
end
this does not work meaning no sentence are selected although I know that
there are sentences in the working memory.
but when I add ETimeConstraint.name it does:
rule My Test
when
$sentences: ArrayList()
from collect (IPhoneSentences.Sentence(
descriptor contains ETimeConstraint.name
))
then
//something
end
I can stick to this workaround but it becomes very problematic to work this
way. Furthermore once I wish to define a variable for example defining
$timeConstraint :
rule My Test
when
$cm: Condition(
$timeConstraint:
contextIntention,
)
$sentences: ArrayList()
from collect (IPhoneSentences.Sentence(
descriptor contains $timeConstraint
))
then
//something
end
this will not work because I can’t put $timeConstraint.name
any suggestions?
I am running:
- Drools 5.2.0
- Eclipse Helios
- JBoss 5.1.0
Thanks
Hezi
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Re: [rules-users] Problem evaluating with Enum
If the purpose of your constraint would be to test whether some CollectionObject *contains any object of a certain type*, then, sorry: there is no such thing in Drools, not out of the box. You could write a function, use some (static) Java method, or implement a constraint operator containsInstanceOf which would have a java.lang.Class object as its second argument. -W ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
