Drools in jBPM
by fraction8
I have problem in using drools in simple jBPM application. Every thing works
fine while it is runs under JUNIT but when I export it to jBPM i got
exception
org.jboss.resteasy.spi.UnhandledException:
org.drools.RuntimeDroolsException: Unable to resolve class
'myclass.jbpm.vrk.Claim'
org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:319)
org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:230)
org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:206)
org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:360)
org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:173)
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:93)
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:68)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilter.java:59)
root cause
org.drools.RuntimeDroolsException: Unable to resolve class
'myclass.jbpm.vrk.Claim'
org.drools.base.ClassFieldAccessorCache.getClass(ClassFieldAccessorCache.java:269)
org.drools.base.ClassFieldAccessorCache.getReadAcessor(ClassFieldAccessorCache.java:241)
org.drools.base.ClassFieldAccessorStore.wire(ClassFieldAccessorStore.java:379)
org.drools.base.ClassFieldAccessorStore.merge(ClassFieldAccessorStore.java:270)
org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:466)
org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:379)
org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:121)
myclass.jbpm.drools.DroolsRulesManager.runDrlRule(Unknown Source)
My drl is very simple:
import myclass.jbpm.vrk.Claim;
rule "Rule 01"
when
$claim : Claim( $date : date, $elements : elements, $simpleClaim :
simpleClaim )
eval( $elements <= 10 )
then
$claim.setSimpleClaim( true );
System.out.println("It's a simple claim!: " + $date + ", elements: "
+ $elements + ", simple: " + $simpleClaim);
end
The only way to solve it is to write new ClassLoader and pass it to
KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null,
myNewClassLoader);
, or this error is caused by something else?
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16 years, 2 months
Re: [rules-users] Drools Planner - Scheduling question work orders
by Geoffrey De Smet
I've answered this to the user mailing list, please post any follow ups
there
http://www.jboss.org/drools/lists.html
schumacv schreef:
> Hi Geoffrey,
>
> I currently working on a project to schedule several work orders in a closed time frame on different objects. I know that this is very similar to the ITC2007 examination example, but I have big problem with the only big difference.
>
Do you mean work orders for machine queues as in "work queue planning"?
> My problem is, that the work orders I have to schedule don't have the same duration. So it can be, that the duration differs from a couple of minutes to several hours. I saw in your example, that you have worked with a list of periods, in which the exams can take place. So maybe you might have an idea or a hint for me, how I could solve this problem. Thank you in advance.
>
One way that works well on vehicle routing and work queue planning is to
make smarter moves.
Take a look at the Move implementation in the smart version of the
TravelingTournament example.
Basically, the idea is to make a non-caching
SqueezeWorkOrderBetweenTwoOtherWorkOrdersMoveFactory
that creates SqueezeWorkOrderBetweenTwoOtherWorkOrdersMove.
Where the work order is taken away, the following work orders are pulled
forward,
where the work order is added, the following work orders are pushed into
the future.
> Kind regards,
>
> Volker Schumacher
>
>
With kind regards,
Geoffrey De Smet
16 years, 2 months
Problem with legacy rules- Conditional operators
by Henrique Neves do Nascimento
Hi,
I have this case in my rules:
rule "teste ID menor que zero ou null "
dialect "mvel"
#activation-group "grupo1"
when C100($id : id < 0 || id == null)
then
System.out.println("O valor de id eh: " + $id);
end
This kind of expression "($id : id < 0 || id == null)" works fine using
drools 4.0.7, but when i tried to update my project to use drools 5.0.1, it
breaks.
As it seems, the second part of the OR statement "id == null" overwrites the
first part "id < 0", making my tests fail.
I know the alternatives to solve this expression, but i would need to search
and change more than 1500 legacy rules in my project.
Do you guys have any kind of information about this??
Regards,
Henrique
16 years, 2 months
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16 years, 2 months
suprises when using auto-focus with salience or lock-on-active
by oknuutti
While evaluating Drools 5.1.0 M1, I came across two issues which strike me
somewhat undesirable. Maybe there's good reasons why they exist; perhaps I'm
missing something?
First:
If I have two agenda groups, each with a rule that has auto-focus set to
true and different saliences, the group which will get the focus first seems
to be determined by the order in which the auto-focused rules appear in the
drl-file, not by their salience.
// example snippet:
rule "rule1"
salience 0
agenda-group "group1"
auto-focus true
when
then
System.out.println("rule1 fired");
end
rule "rule2"
salience -100
agenda-group "group2"
auto-focus true
when
then
System.out.println("rule2 fired");
end
// output of the example:
rule2 fired
rule1 fired
If I change the salience of rule2 to 100 the result is still the same. It
seems reasonable to me that the salience would be taken into account also in
this situation.
Second:
This issue is with auto-focus and lock-on-active. If I add "lock-on-active
true" to rule2 and also a third rule:
// continuing the earlier example:
rule "rule3"
agenda-group "group2"
when
then
System.out.println("rule3 fired");
end
then I get the following puzzling output:
rule3 fired
rule1 fired
It seems that auto-focus activates the agenda group first and then tries to
activate rule2 but the activation is discarded by lock-on-active. I feel
that this is a bit too strong loop prevention. I would rather see rule2
fired once, with no consecutive activations in the case that it would have
some conditions that were changed by rule3.
Any comments?
Olli
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16 years, 2 months
New type of Score and solving time very hight
by dmzpippo-drools＠yahoo.it
Hi Geoffrey,
I'm developing the algorithm for Vehicle Routing Problem with Time Windows (written by Gendreau Herz and Laporte). To do it I need a new type of scoring and I have developed DOUBLE_SCORE (double hard and double soft).
If you wont I can send you this code.
I write you because have a problem with solving time....
I'm testing this algorithm on Solomon's data set (100 nodes and 10-20 vehicle) but the execution time of solver is very hight and often after one day not end....(termination criteria is steps number).
There are twelve rules and the number of moves is #nodes*#Vehicle^2 but with relativeSelection may decrease and I'm using Taboo Search.
I wont to ask you if for your experience the drools-solver can solve a problem of this dimension.
regards
Marco Caminiti
16 years, 2 months
Re: [rules-users] firing rules multiple times
by Greg Barton
If you insert a new object into the session that matches the rule it will fire again automatically. (Either call fireAllRules when you want the rules to fire or use fireUntilHalt.)
GreG
On Dec 24, 2009, at 10:16, HonorGod <jagadeesh.motamarri(a)barclayscapital.com> wrote:
I need to load 2 rule files in the session once and fire them over 1000 times
without reloading the rules every time. But the objects inserted into the
session are different all the 1000 times.
I am newbie and just looking for quick implements for a POC.
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16 years, 2 months
Re: [rules-users] Drools flow web console (5.1.M1) deployment in JBoss
by Rafal Rusin
Hello,
I have similar problem while listing processes in gwt-console - 'Could
not initialize stateful knowledge session'.
I tried to go through manual to set up drools flow with humantasks. I
basicly went through
https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/t...
.
But I get this exception (listing human tasks works well):
org.jboss.resteasy.spi.UnhandledException: java.lang.RuntimeException:
Could not initialize stateful knowledge session:
java.lang.reflect.InvocationTargetException
at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:319)
at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:230)
at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:206)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:360)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:173)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:93)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:68)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilter.java:59)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.RuntimeException: Could not initialize stateful
knowledge session: java.lang.reflect.InvocationTargetException
at org.drools.integration.console.DroolsFlowCommandDelegate.newStatefulKnowledgeSession(DroolsFlowCommandDelegate.java:69)
at org.drools.integration.console.DroolsFlowCommandDelegate.getSession(DroolsFlowCommandDelegate.java:77)
at org.drools.integration.console.DroolsFlowCommandDelegate.<init>(DroolsFlowCommandDelegate.java:36)
at org.drools.integration.console.DroolsFlowProcessManagement.<init>(DroolsFlowProcessManagement.java:20)
at org.drools.integration.console.DroolsFlowManagementFactory.createProcessManagement(DroolsFlowManagementFactory.java:11)
at org.jboss.bpm.console.server.ProcessMgmtFacade.getProcessManagement(ProcessMgmtFacade.java:83)
at org.jboss.bpm.console.server.ProcessMgmtFacade.getDefinitionsJSON(ProcessMgmtFacade.java:107)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:117)
at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:260)
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:232)
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:166)
at org.jboss.resteasy.core.DispatcherUtilities.getJaxrsResponse(DispatcherUtilities.java:142)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)
... 28 more
Caused by: java.lang.IllegalStateException:
java.lang.reflect.InvocationTargetException
at org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.buildCommanService(JPAKnowledgeServiceProviderImpl.java:97)
at org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:72)
at org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102)
at org.drools.integration.console.DroolsFlowCommandDelegate.newStatefulKnowledgeSession(DroolsFlowCommandDelegate.java:51)
... 44 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.buildCommanService(JPAKnowledgeServiceProviderImpl.java:85)
... 47 more
Caused by: java.lang.RuntimeException: Could not find session data for id 1
at org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:191)
... 52 more
Detailed logs are in attachment.
I compiled 'default' package containing example flow in guvernor, but
this didn't help.
I think that guvnor.war doesn't use testDS1 datasource, so I suppose
it writes SessionInfo object somewhere else. Do you think I could
reconfigure jackrabbit to use testDS1 datasource? Does that make
sense?
I used http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk@30785
version from Sun Dec 20 18:50:08 2009. I deployed things on JBoss
5.1.0.GA.
Do you have some ideas why this doesn't work?
Regards,
--
Rafał Rusin
http://rrusin.blogspot.com
http://www.touk.pl
http://top.touk.pl
16 years, 2 months
