drools flow - why after reloading some process previously completed workItems gets executed once again?
by gs76pl
hi,
i've a simple drools flow process with one workItem (its execute method
simply prints some text) and one human task. I'm using
drools-persistence-jpa to save my process status and load it when
process/server crashes.
What i've noticed is that:
1. after starting process my processinfo table gets updated with a new
process status (P1)
2. my workItem (W1) runs correctly and prints a text
3. a human task gets created
----- when i stop my server at this point and restart my server executing
below steps
1. load the session using
JPAKnowledgeService.loadStatefulKnowledgeSession(myPreviousSessionId,....)
2. start the process
At this point previously completed workItem (W1) gets executed once again
and the same human task gets created !!
I thought that perhaps the issue is with my transactionManager not
committing steps but since i'm using local transaction (commit happens after
any process step) its very unlikely.
Is it a bug that the same workItem gets executed or is it intentional and
it's up to the developer to check somewhere else whether specific step has
been already finished or not..?
--
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15 years, 5 months
Drools Guvnor - Websphere 7
by smileychappy
I'm trying to install and run Guvnor on Websphere 7.
When I try starting the app, I get the following exception
[4/5/11 11:02:26:793 EDT] 00000085 webapp E
com.ibm.ws.webcontainer.webapp.WebApp notifyServletContextCreated SRVE0283E:
Exception caught while initializing context: {0}
org.jboss.seam.InstantiationException:
Could not instantiate Seam component: repositoryConfiguration
at org.jboss.seam.Component.newInstance(Component.java:2066)
at org.jboss.seam.contexts.Contexts.startup(Contexts.java:304)
at org.jboss.seam.contexts.Contexts.startup(Contexts.java:278)
at
org.jboss.seam.contexts.ServletLifecycle.endInitialization(ServletLifecycle.java:112)
at org.jboss.seam.init.Initialization.init(Initialization.java:727)
at
org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:34)
at
com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1681)
at
com.ibm.ws.webcontainer.webapp.WebApp.commonInitializationFinish(WebApp.java:374)
at
com.ibm.ws.webcontainer.webapp.WebAppImpl.initialize(WebAppImpl.java:299)
at
com.ibm.ws.webcontainer.webapp.WebGroupImpl.addWebApplication(WebGroupImpl.java:100)
at
com.ibm.ws.webcontainer.VirtualHostImpl.addWebApplication(VirtualHostImpl.java:166)
at
com.ibm.ws.webcontainer.WSWebContainer.addWebApp(WSWebContainer.java:731)
at
com.ibm.ws.webcontainer.WSWebContainer.addWebApplication(WSWebContainer.java:616)
at
com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:376)
at
com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:668)
at
com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1122)
at
com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1315)
at
com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:623)
at
com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:940)
at
com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:725)
at
com.ibm.ws.runtime.component.ApplicationMgrImpl$1.run(ApplicationMgrImpl.java:1266)
at
com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:4599)
at
com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:4687)
at
com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:255)
at
com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplicationDynamically(ApplicationMgrImpl.java:1271)
at
com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2043)
at
com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:439)
at
com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123)
at
com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:382)
at
com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:653)
at
com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:615)
at
com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:1177)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:37)
at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:244)
at
javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1086)
at
javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:967)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:848)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:773)
at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1320)
at
com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118)
at
com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1213)
at
com.ibm.ws.management.commands.AdminServiceCommands$InvokeCmd.execute(AdminServiceCommands.java:251)
at com.ibm.ws.console.core.mbean.MBeanHelper.invoke(MBeanHelper.java:239)
at
com.ibm.ws.console.appdeployment.ApplicationDeploymentCollectionAction.execute(ApplicationDeploymentCollectionAction.java:564)
at org.apache.struts.action.RequestProcessor.processActionPerform(Unknown
Source)
at org.apache.struts.action.RequestProcessor.process(Unknown Source)
at org.apache.struts.action.ActionServlet.process(Unknown Source)
at org.apache.struts.action.ActionServlet.doPost(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1655)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1595)
at
com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:104)
at
com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:77)
at
com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:908)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:932)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:500)
at
com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:341)
at org.apache.struts.action.RequestProcessor.doForward(Unknown Source)
at org.apache.struts.tiles.TilesRequestProcessor.doForward(Unknown Source)
at org.apache.struts.action.RequestProcessor.processForwardConfig(Unknown
Source)
at
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(Unknown
Source)
at
com.ibm.isclite.container.controller.InformationController.processForwardConfig(InformationController.java:217)
at org.apache.struts.action.RequestProcessor.process(Unknown Source)
at org.apache.struts.action.ActionServlet.process(Unknown Source)
at org.apache.struts.action.ActionServlet.doPost(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1655)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1595)
at
com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:131)
at
com.ibm.ws.console.core.servlet.WSCUrlFilter.setUpCommandAssistence(WSCUrlFilter.java:927)
at
com.ibm.ws.console.core.servlet.WSCUrlFilter.continueStoringTaskState(WSCUrlFilter.java:494)
at
com.ibm.ws.console.core.servlet.WSCUrlFilter.doFilter(WSCUrlFilter.java:315)
at
com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:188)
at
com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:116)
at
com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:77)
at
com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:908)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:932)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:500)
at
com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
at
com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91)
at
com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:864)
at
com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1583)
at
com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:186)
at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)
at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)
at
com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
at
com.ibm.ws.ssl.channel.impl.SSLReadServiceContext$SSLReadCompletedCallback.complete(SSLReadServiceContext.java:1772)
at
com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at
com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at
com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at
com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1550)
Caused by: java.lang.RuntimeException: exception invoking: create
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:148)
at org.jboss.seam.Component.callComponentMethod(Component.java:2171)
at org.jboss.seam.Component.callCreateMethod(Component.java:2094)
at org.jboss.seam.Component.newInstance(Component.java:2054)
... 104 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
at
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
at
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
at
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)
at
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)
at
org.drools.guvnor.server.repository.RepositoryStartupService_$$_javassist_1.create(RepositoryStartupService_$$_javassist_1.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:138)
... 107 more
Caused by: java.lang.NoSuchMethodError:
javax/jcr/Repository.login(Ljavax/jcr/Credentials;)Ljavax/jcr/Session;
at
org.drools.guvnor.server.repository.RepositoryStartupService.newSession(RepositoryStartupService.java:151)
at
org.drools.guvnor.server.repository.RepositoryStartupService.create(RepositoryStartupService.java:72)
... 128 more
Am I missing some libraries or something in the process. Please let me know.
Thanks!
--
View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Guvnor-Websphe...
Sent from the Drools - User mailing list archive at Nabble.com.
15 years, 5 months
[Drools Flow] Stop a timer event
by JAMAL Moundir (EXT)
Hello,
I'm using Drools Flow 5, I have N Message events waiting for a signal to be started, I want to launch a Timer in the beginning of my WorkFlow, if one of the event is received, then I want to stop the Timer and execute my workflow, else I want to execute another branch of my workflow.
For example :
1- Start
- Launch the Timer of 30s
- Wait for a Message (external event)
2- Case 1 : External event received before 30s
- Execute SubProcess 1 and stop the Timer
Case 2 : Timer reached 30s
- Execute SubProecss 2 and ignore the external event
How can I stop the Timer when the case 1 is verified ? Can I do such as thing with Drools Flow ?
In my current implementation even when the case 1 is verified, after the 30s the subProcess2 is also executed !
Did someone implement such us thing
Thanks,
Regards
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Neither SOCIETE GENERALE nor any of its subsidiaries or affiliates shall be liable for the message if altered, changed or
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15 years, 5 months
Manuel's Analysis of JBRULES-2887 (NPE in AccumulateNode.java:967)
by Wolfgang Laun
Thanks a lot, and I've added your analysis as a comment to JBRULES-2887.
Wolfgang
2011/4/3 Manuel Ortiz <manuel.ortizramos(a)gmail.com>
> Hi Wolfgang:
>
> I write to you concerning JIRA
> https://issues.jboss.org/browse/JBRULES-2887, which the SampleAlarmRules
> scenario which was attached to this discussion was added in.
>
> I've executed several times the SampleAlarmRules scenario and found that
> the problem in that scenario is the existence of a JoinNode (Node 18) which
> feeds two nodes, a JoinNode (Node 20) and an AccumlateNode (Node 25, the one
> in which NPE occurs). I've seen that the child tuples of a join node are
> interconnected via pointers and that those connections must be updated every
> time a parent tuple of the join node is modified, via reAddLeft and
> reAddRight tuple methods. When a JoinNode feeds two or more nodes, the child
> tuples are interconnected in a ordered way that mixes tuples with different
> sinks.
>
> In the SampleAlarmRules scenario, when JoinNode18 is right modified, the
> CompositeLeftTupleSinkAdapter processes several child tuples, but only the
> last one is returned and reAddLeft'ed, hence breaking the child tuple
> relations which it seems necessary to keep rete coherence. After this right
> modify, the next left modify fails because a child tuple related to one node
> of the composite sink is used to check the next operation to do in another
> sink node different from the first one. This leads to a chain of incorrect
> assertions which ends in the AccumulateNode NPE.
>
> I've rewriten my rules in order to JoinNode18 feeds only AccumulateNode25
> thus avoiding the NPE and returning to my user role. However I am not sure
> if any CompositeSink starting at a JoinNode will have this or other problems
> when being left or right modified. I hope this information helps to solve
> this problem.
>
> Best regards,
>
> Manuel Ortiz.
>
>
> 2011/3/31 Wolfgang Laun <wolfgang.laun(a)gmail.com>
>
>>
>>
>> 2011/3/31 Manuel Ortiz <manuel.ortizramos(a)gmail.com>
>>
>>> Hi Wofgang:
>>>
>>> Thank youvery much for your response. I was replaying to Mauricio when
>>> your email has arrived. I hope the test case is useful.
>>>
>>>
>> Thanks. Files are attached to the JIRA and JIRA is now at "critical".
>> -W
>>
>>
>>> Best regards,
>>>
>>> Manuel Ortiz.
>>>
>>>
>>> 2011/3/31 Wolfgang Laun <wolfgang.laun(a)gmail.com>
>>>
>>>> Manuel,
>>>>
>>>> I have reported this (or a very similar) problem
>>>> https://issues.jboss.org/browse/JBRULES-2887 with a small example to
>>>> reproduce.
>>>>
>>>> The stack trace is not identical, so please try to reproduce this with a
>>>> small test case; it is bound to happen with a rule (Test Negativo Alarma
>>>> Acceso Portal Ubicacion UM) that modifies some fact that is used in an
>>>> "accumulate" phrase, (If this pattern is different from the one I gave, I'll
>>>> raise the issue priority to "critical".)
>>>>
>>>> Cheers
>>>> Wolfgang
>>>>
>>>>
>>>> 2011/3/30 Manuel Ortiz <manuel.ortizramos(a)gmail.com>
>>>>
>>>>> Hello all!
>>>>>
>>>>> I am new in Drools but day by day, test by test, I think I get a bit
>>>>> more knowledge of how the rule engine works from user point of view. I've
>>>>> been adding rules to an alarm system, increasing the complexity and
>>>>> functionality in several steps. Unfortunately in the last step I found the
>>>>> following NullPointerException inside the rule engine...
>>>>>
>>>>> java.lang.NullPointerException
>>>>> at
>>>>> org.drools.reteoo.AccumulateNode.getFirstMatch(AccumulateNode.java:967)
>>>>> at
>>>>> org.drools.reteoo.AccumulateNode.modifyLeftTuple(AccumulateNode.java:329)
>>>>> at
>>>>> org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateModifyChildLeftTuple(SingleLeftTupleSinkAdapter.java:239)
>>>>> at
>>>>> org.drools.reteoo.AccumulateNode.evaluateResultConstraints(AccumulateNode.java:640)
>>>>> at
>>>>> org.drools.reteoo.AccumulateNode.assertObject(AccumulateNode.java:270)
>>>>> at org.drools.reteoo.BetaNode.modifyObject(BetaNode.java:312)
>>>>> at
>>>>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:460)
>>>>> at
>>>>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:428)
>>>>> at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:160)
>>>>> at
>>>>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:460)
>>>>> at
>>>>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:428)
>>>>> at
>>>>> org.drools.reteoo.ObjectTypeNode.modifyObject(ObjectTypeNode.java:263)
>>>>> at
>>>>> org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:172)
>>>>> at
>>>>> org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1442)
>>>>> at
>>>>> org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1349)
>>>>> at
>>>>> org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:183)
>>>>> at
>>>>> org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:196)
>>>>> at
>>>>> es.simcasva.alarmas.rules.Rule_Test_Negativo_Alarma_Acceso_Portal_Ubicacion_UM_0.defaultConsequence(Rule_Test_Negativo_Alarma_Acceso_Portal_Ubicacion_UM_0.java:18)
>>>>> at
>>>>> es.simcasva.alarmas.rules.Rule_Test_Negativo_Alarma_Acceso_Portal_Ubicacion_UM_0DefaultConsequenceInvoker.evaluate(Rule_Test_Negativo_Alarma_Acceso_Portal_Ubicacion_UM_0DefaultConsequenceInvoker.java:44)
>>>>> at
>>>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:917)
>>>>> at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:856)
>>>>> at
>>>>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1071)
>>>>> at
>>>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:785)
>>>>> at
>>>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:751)
>>>>> at
>>>>> org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218)
>>>>>
>>>>> I've been trying to find the problem, and found a strange interaction
>>>>> between three rules that makes the null pointer to appear. The alarm system
>>>>> has many rules now and it is difficult to simplify the scenario, so I just
>>>>> would like to know what is the funcion of AccumulateNode object in order to
>>>>> have an idea of the NullPointerException possible cause.
>>>>>
>>>>> Can anyone help me?
>>>>>
>>>>> Thank you in advance for your time.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Manuel Ortiz.
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> rules-users mailing list
>>>>> rules-users(a)lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> rules-users(a)lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>>>
>>>
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users(a)lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users(a)lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
15 years, 5 months
KnowledgeAgent Issue
by Steven Williams
Hi all,
I am trying to use a Knowledge Agent in 5.1.1 with a change set with a few
different packages and resource types in it, and I am running into a problem
where it is not adding all the packages. Looking at the code I can see that
KnowledegeAgentImpl.createPackageFromResource has the following code when it
loads a resource:
if (kbuilder.getKnowledgePackages().iterator().hasNext()) {
return (KnowledgePackageImp)
kbuilder.getKnowledgePackages().iterator().next();
}
and KnowledgeBuilderImpl.getKnowledgePackages does the following:
Package[] pkgs = pkgBuilder.getPackages();
List<KnowledgePackage> list = new ArrayList<KnowledgePackage>( pkgs.length
);
and PackageBuilder.getPackages does the following:
for ( PackageRegistry pkgRegistry : this.pkgRegistryMap.values() ) {
Package pkg = pkgRegistry.getPackage();
// add package to array
}
pkgRegistryMap is implemented as a HashMap however so the order the packages
are returned in is not guaranteed. I seem to be hitting this problem.
This is a hard one to create a unit test for so I wanted to check that my
analysis is correct before raising a bug. Perhaps using a LinkedHashMap or
similar would fix it?
thanks
Steve
15 years, 5 months
Rule does not fire after 'Modify/Update' of a fact - Drools 5.1.1 !
by groovenarula
Hello all,
For some reason I have a rule that does not fire after a Modify/Update.
I have 2 facts - Product and Option. The relationship between them is that a
'Product' can have 0 - N 'Option'(s).
Based on that, I added a 'product' field to the 'Option' object. I'm
creating and inserting my facts
using the following code :
Product prod = new Product ("001","002", "A");
prod.setPrice(new BigDecimal("300.00"));
Option opt = new Option ("H1","",prod);
ksession.insert(prod);
ksession.insert(opt);
Now in my .DLR, I have the following rule :
rule "Set Options price"
salience 50
when
$prod : Product ( price != null )
$option : Option ( product == $prod )
then
System.out.println( "Getting Options " + $prod );
end
This gives me the correct output in the console :
Getting Options Product [category=001, grade=A, price=300.00, style=002]
The rule fired successfully.
I start running into problems when I try to update the 'price' field using a
rule, instead of through code.
So for example, if I have the following rule also defined in the same drl
file :
rule "Set price"
salience 500
when
$prod : Product ( category == "001", price == null )
then
$prod.setPrice ( new BigDecimal ( "300.00" ) );
update( $prod );
System.out.println( $prod );
end
And then change my code as follows (remove the setPrice call) :
Product prod = new Product ("001","002", "A");
Option opt = new Option ("H1","",prod);
ksession.insert(prod);
ksession.insert(opt);
I only get the following output :
Product [category=001, grade=A, price=300.00, style=002]
What am I missing here ? I thought the rule 'Set Price' should update the
product fact with
the new price and the rules would get re-evaluated. After the re-evaluation,
the LHS of 'Set Options Price' should now be true and it should have fired.
But it does not.
Am I mis-understanding something about activation here ? If I am, can
someone please help explain what the gap is and how to re-write the rules so
that I can achieve the above objective ?
Any help will be appreciated. I've spend several hours trying different
permutations and combinations and got no where.
Thanks
Gurvinder
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15 years, 5 months
Map Accessor not allowing using a $parameter, gets field extractor error
by AberAber
Using Drools 5.1.1
Is there anything I can do except to make a method/property in my original
class to do the .get into map for me? According to drools specs this should
work.
This gets the error:
rule "Find Lowest Score"
salience 100
when
$aobject : DataObject($index: extracted.indexString)
$node : Information($classScore : adjustedScores[$index])
then
System.out.println(" Class score " + $classScore);
end
Description Resource Path Location Type
BuildError: Unable to create Field Extractor for 'adjustedScores[$index]'
droolsLocal.drl /src/main/resources line 30 Drools Error
This works:
rule "Find Lowest Score"
salience 100
when
$aobject : DataObject($index: extracted.indexString)
$node : Information($classScore : adjustedScores["ASTRING"])
then
System.out.println(" Class score " + $classScore);
end
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15 years, 5 months
Speed up inserting of rules into knowledge base
by Piotr Jedrychowski
Hello.
I'm loading a big amount of rules during starting of JBoss (20000
rules). All rules (in string format) are available before JBoss startup
- they are stored into database. Rules are loaded one by one and it
takes about 90 minutes. I want to speed up this process. Is there
something like "bulk load" for inserting rules into knowledge base or
another smart way to fast loading a big amount of rules?
I'm using:
1) Drools 5.1
2) JBoss 4.2.3
My source code looks like this:
String rule = ...
Resource resource = ResourceFactory.newReaderResource(new
StringReader(rule));
KnowledgeBuilder knowledgeBuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
knowledgeBuilder.add(resource, ResourceType.DRL);
knowledgeBase.addKnowledgePackages(knowledgeBuilder.getKnowledgePackages());
Regards,
Piotr
15 years, 5 months
Spring + Drools + Console Application
by Anderson Neves
Hi everybody.
I am having a problem to instantiate a console application with Drools and
Sping. With Spring, I am able to instanciate a bean and print its value to
console, but with Spring + Drools I get this error:
Exception in thread "main"
org.springframework.beans.factory.BeanCreationException: Error creating bean
with name 'kbase': Invocation of init method failed; nested exception is
java.lang.RuntimeException: Unable to parser Reader
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:423)
at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
at
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at com.test.Test.main(Test.java:10)
Caused by: java.lang.RuntimeException: Unable to parser Reader
at org.drools.compiler.DrlParser.getParser(DrlParser.java:313)
at org.drools.compiler.DrlParser.parse(DrlParser.java:141)
at org.drools.compiler.DrlParser.parse(DrlParser.java:147)
at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:263)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:458)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:519)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
at
org.drools.container.spring.beans.KnowledgeBaseBeanFactory.afterPropertiesSet(KnowledgeBaseBeanFactory.java:103)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)
... 15 more
Caused by: java.lang.NullPointerException
at java.io.FilterInputStream.close(Unknown Source)
at
sun.net.www.protocol.jar.JarURLConnection$JarURLInputStream.close(Unknown
Source)
at sun.nio.cs.StreamDecoder.implClose(Unknown Source)
at sun.nio.cs.StreamDecoder.close(Unknown Source)
at java.io.InputStreamReader.close(Unknown Source)
at
org.antlr.runtime.ANTLRReaderStream.load(ANTLRReaderStream.java:92)
at
org.antlr.runtime.ANTLRInputStream.<init>(ANTLRInputStream.java:68)
at
org.antlr.runtime.ANTLRInputStream.<init>(ANTLRInputStream.java:52)
at
org.antlr.runtime.ANTLRInputStream.<init>(ANTLRInputStream.java:48)
at
org.antlr.runtime.ANTLRInputStream.<init>(ANTLRInputStream.java:40)
at org.drools.compiler.DrlParser.getParser(DrlParser.java:308)
... 24 more
I use eclipse, and running from the IDE Spring + Drools in a console
application works fine. This problem happens when I generate an executable
jar and try the "java -jar" command.
My main method is below
public static void main(String[] args) {
ClassPathXmlApplicationContext context = new
ClassPathXmlApplicationContext("appConfig.xml");
StatefulKnowledgeSession ksession = (StatefulKnowledgeSession)
context.getBean("ksession");
System.out.println(ksession);
}
And my applicationContext.xml is below
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:drools="http://drools.org/schema/drools-spring"
xmlns:camel="http://camel.apache.org/schema/spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://drools.org/schema/drools-spring
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-containe...
http://camel.apache.org/schema/spring
http://camel.apache.org/schema/spring/camel-spring.xsd">
<drools:kbase id="kbase">
<drools:resources>
<drools:resource source="classpath:knowledgebase-config.xml"
type="CHANGE_SET" />
</drools:resources>
</drools:kbase>
<drools:ksession id="ksession" type="stateful" kbase="kbase" />
</beans>
Any clue of what is cousing the problem? Thank you very much.
Regards,
Anderson
15 years, 5 months
Import repository in Guvnor
by Sébastien Raickman
Hi guys,
do someone have an example how to call the "org.drools.guvnor.Guvnor/backup"
(RepositoryBackupServlet) servlet for uploading a repository_export.xml?
Thanks in advance!
Seb
15 years, 5 months
