Upgrade from drools 5.4 to 6.0.0-Beta3 - Legacy API Adapter JAR
by MaverickDrools
Hi,
There is not enough documentation on drools v6.0.0-Beta3, but this is what
I'm trying to do.
Our system was designed with 5.3 but then we encountered the issue with
synchronization (https://issues.jboss.org/browse/JBRULES-3283), so we
upgraded to v 5.4.
Things worked fine until we multithreaded the client code due to which we
faced another issue (https://issues.jboss.org/browse/JBRULES-3675)
So finally now, I'm trying to upgrade to 6.0.0-Beta3 since both those issues
should've been fixed with 6.0.0-Alpha1. The problem I'm facing is, I do not
have enough documentation to look at to see how to convert those things. I
went through the slides etc that were posted on the mailing list for the
conferences, but I'm still unable to figure it out correctly..
So, can someone point me to a JUnit or something that I can look at to
figure this thing out?
static {
KieServices ks = KieServices.Factory.get();
KieRepository kr = ks.getRepository();
Resource res = ks.getResources().newFileSystemResource(
"src/main/resources/rules/abc.drl");
KieModule kModule = kr.addKieModule(res);
kc = ks.newKieContainer(kModule.getReleaseId());
}
throws an exception on kr.addKieModule(res) which says Error in opening zip
file.. I assume we are now expecting a jar instead of a plain drl file. Is
there a way to convert this drl into a jar that the 6.0 code can understand
(for compatibility purposes with the existing system)?
Another thought was to make use of the Legacy API Adapter JAR, but I
couldn't find any examples of the same. Can you point me to a code
sample/JUnit that could explain how this works?
Thanks
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11 years, 7 months
java.lang.NullPointerException when using a custom operator
by Hezi Stern
Hi all,
I have been working with Drools 5.2.0 on windows xp and I have a stable
project.
I upgraded to windows 8, drools 5.5.0 and upgraded to eclipse Juno (from
Helios).
I have now encountered a strange problem with my existing drools project. I
have a accustom operator called supersetof which now results in the
following error reported in the IDE in any file where the supersetOf is used
(LHS):
Error: java.lang.NullPointerException
After receving this error the drools parser does not work, hence this is the
only error I have.
I have tried to use the Drools 5.2.0 again (on the new windows 8 machine)
but I get the same problem so I guess it has to do with some IDE\eclispe
configuration or compatibility issue.
Obviously not the drools project code as I have not made any changes to the
working project.
I did make sure the custom operator is configured similar to the way it was
on my previous computer.
Any ideas? Is there a different configuration for Juno?
Thanks,
Hezi
11 years, 7 months
Guvnor enumerations
by Stephen Masters
Hi folks,
I don't suppose anything notable changed between 5.3 and 5.5 in the way Guvnor loads data enumerations?
I have a number of enumerations similar to the following:
'MyFact.currencies' : (new com.myapp.guvnor.enums.CurrencyEnum()).isoCodes()
But I see the exception in Guvnor:
Unable to load enumeration data.
[Error: unable to invoke method: isoCodes] [Near :{... 'MyFact.': ….}] ^ [Line: 1, Column: 1]
Error type: org.mvel2.PropertyAccessException
The jar is in the lib directory, there is a method called "isoCodes()", and when I run the main class inside it then the various enumerations are returned. And yes, it did (does) work absolutely fine in 5.3 with this same configuration.
Steve
11 years, 8 months
Planner with a list of planning variables
by Justin Case
Hello all,
can I use as planning variable a list of values?
Here's a test use case: planning a food recipe, where the recipe can have say maximally 5 ingredients (taken from the solution property, I guess). So far I could find in the examples and documentation, it's all about ONE planning variable in the solution, but here I'd need a LIST of such... is it actually doable this way?
I cannot do it the other way around, as an ingredient may be found in more recipes...
Many thanks,
JC
11 years, 8 months
Optaplanner: Unexpected global [scoreHolder]
by jonathan.labin
I am using Optaplanner 6.0.0-Beta2 and I am in some cases receiving the
following error during initial solution construction:
Exception in thread "main" java.lang.RuntimeException: Unexpected global
[scoreHolder]
at
org.drools.core.common.AbstractWorkingMemory.setGlobal(AbstractWorkingMemory.java:515)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.setGlobal(StatefulKnowledgeSessionImpl.java:360)
at
org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.resetKieSession(DroolsScoreDirector.java:83)
at
org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.setWorkingSolution(DroolsScoreDirector.java:74)
at
org.optaplanner.core.impl.solver.scope.DefaultSolverScope.setWorkingSolutionFromBestSolution(DefaultSolverScope.java:176)
at
org.optaplanner.core.impl.solver.DefaultSolver.solvingStarted(DefaultSolver.java:176)
at
org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:154)
I noticed this error in gist:
https://gist.github.com/ge0ffrey/5236604
If this is the same error, what are the current constraints that I need
adhere to in order to avoid this error?
Jon
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11 years, 10 months
Date equal comparison fails - don't understand why
by Saloojee, Karim
Hi
I am comparing SimpleAccount( dateAccountOpened == "5-Feb-2011")
where dateAccountOpened is "Sat Feb 05 00:00:00 GMT+02:00 2011" (if you
call toString()). The equal comparator fails (==) but the greater than
comparator passes (>) which I don't understand.
I feel I am missing something obvious here, but I have no idea what it
is.
rule "Test date equality"
when
$acc : SimpleAccount( dateAccountOpened == "5-Feb-2011")
then
System.out.println("Expected and found an account opened
on 5-Feb-2011: " + $acc);
end
rule "Some dates are more equal than others"
when
$acc : SimpleAccount( dateAccountOpened > "5-Feb-2011")
then
System.out.println("Unexpected match: " +
$acc.getDateAccountOpened());
end
Regards,
Karim
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11 years, 10 months
Transaction problems in high concurrency JBPM+Drools+Hibernate instalation
by Alberto R. Galdo
Hi guys,
We have an application built around long running JBPM processes with a
large user base and high concurrency ... early on we began to have issues
with transactions in JBPM and nowadays are watching lots of different
realizations of transaction managing problems that lead to dead human tasks
( state: ERROR ), errors running processes and so on ( different
exceptions follows ):
13:22:48,261 WARN [org.drools.persistence.jta.JtaTransactionManager]
(pool-11-thread-1) Unable to commit transaction:
javax.transaction.RollbackException: ARJUNA016053: Could not commit
transaction
Caused by: javax.persistence.PersistenceException: error during managed
flush
Caused by: javax.transaction.RollbackException: ARJUNA016053: Could not
commit transaction.
at
com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1177)
at
com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:117)
at
com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75)
at
org.jboss.tm.usertx.client.ServerVMClientUserTransaction.commit(ServerVMClientUserTransaction.java:167)
at
org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:179)
[drools-persistence-jpa-6.0.0-SNAPSHOT.jar:6.0.0-SNAPSHOT]
Caused by: javax.persistence.PersistenceException:
org.hibernate.HibernateException: Flush during cascade is dangerous
at
org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1361)
[hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]
at
org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1289)
[hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]
11:46:23,754 ERROR [stderr] (schedulerVT_Worker-8)
javax.persistence.PersistenceException: org.hibernate.HibernateException:
proxy handle is no longer valid
11:46:23,754 ERROR [stderr] (schedulerVT_Worker-8) at
org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1361)
11:46:23,755 ERROR [stderr] (schedulerVT_Worker-8) at
org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1289)
11:46:23,756 ERROR [stderr] (schedulerVT_Worker-8) at
org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:261)
11:46:23,756 ERROR [stderr] (schedulerVT_Worker-8) at
So, we're running this installation by the manual. Are using JBoss 7 as
application server, it's transaction manager, Hibernate 4.x as entity
manager, our connection pool delivers READ_COMMITED connections ( so does
hibernate ) ...
Is there anything else we should be doing to avoid this transactional
problems? Has anyone ever tested JBPM in such concurrent scenario? Any
experiences?
Alberto R. Galdo
argaldo(a)gmail.com
11 years, 10 months
Drools server and knowledge agent functionality
by Manuel Ortiz
Hello everybody:
I am taking a look at Drools Integration documentation to understand how
Drools server works and how can be used, and have a doubt concerning, let's
say... 'KnowledgeAgent capabilities'. Does Drools server support on the fly
rule updating as when using KnowledgeAgent to create KnowledgeBase objects?
If it does, where can be configured 'KnowledgeAgent related' properties such
as newInstance or resource scanner interval?
Thank you in advance for your time.
Kind regards,
Manuel Ortiz.
11 years, 11 months
Question about custom accumulation functions
by Bruno Freudensprung
Hi,
While testing my custom accumulation function I noticed an unexpected
behavior (th'ats of course a personal point of view).
It seems that Drools 5.1 calls accumulate(...) and getResult(...) as
many times as the number of accumulated facts (accumulate, getResult,
accumulate, getResult, etc...).
Is it supposed to work like this?
Best regards,
Bruno.
11 years, 11 months
