[rules-users] Problem with JPA session persistence in Drools Flow (5.0.1)
SBalakrishnan
Sanjay.Balakrishnan at fnis.com
Thu Sep 10 18:03:13 EDT 2009
Kris,
Did the updated test case help ? Were you able to reproduce the issue?
Thanks
Sanjay
SBalakrishnan wrote:
>
> Kris,
>
> Thanks again. Sorry my earlier test case was missing some items.
> Updated test case provided below.
>
> Thanks
> Sanjay
>
> /*----------Start Test Case ------------*/
>
>
> Updated Test Case:-
>
> a) Run org.drools.examples.process.order.OrderExample.java
>
> b) Click on the create button (with default options).
>
> Note :- Look up the the session id from the database
>
> c) From the eclipse plugin complete one human task (Verify Order).
>
> d) Stop the Order example .
>
> e) Update the method createWorkingMemory() in
> org.drools.examples.process.order.OrderExample.java,
> to load the last session id in the invocation of
> JPAKnowledgeService.loadStatefulKnowledgeSession.
>
>
>
> f) Run order Order example .
>
> Note:-Should see exception from loadStatefulKnowledgeSession.
> Was getting this error in H2 and Oracle.
>
> /*----------End Test Case ------------*/
>
>
> SBalakrishnan wrote:
>>
>> Thanks for the quick response Kris and appreciate your help.
>>
>> It would be great if we can get more information on the activity by the
>> community member for the fail safe approach for the handlers.
>>
>>
>> Yes, I am using a modified
>> org.drools.examples.process.order.OrderExample.java class.
>> Using a modified drl file RuleSetExample.rf (Only two human tasks).
>> I am attaching the sample project.
>>
>> Thanks
>> Sanjay
>>
>>
>>
>> Test Case:-
>>
>> a) Run org.drools.examples.process.order.OrderExample.java
>> b) Click on the create button (with default options).
>>
>>
>> The main methods being called are:-
>> a) private void createWorkingMemory()
>>
>> intial setup and load of session happens here.
>>
>> b)createOrder()
>>
>> ksession.insert(),ksession.startProcess
>>
>>
>>
>> Kris Verlaenen wrote:
>>>
>>> That NPE seems to be an error in the marshaling of the session. Do you
>>> have a simple test case that you can send me so we can use that to
>>> reproduce this issue (I noticed you are extending the order example, but
>>> you seem to have introduced a few new classes and probably some rules as
>>> well)?
>>>
>>> Regarding the session marshaling, it persists its entire internal state.
>>> So that includes all running process instances, all data in the working
>>> memory (although that is configurable through a strategy) and the
>>> internal state (agenda etc.). This does not include the knowledge base
>>> or external components, like for example work item handlers.
>>>
>>> The current human task handler implementation does indeed not support
>>> restoring after failure, as the event listeners are not re-registered.
>>> A more fail-safe implementation, for example registering the necessary
>>> listeners upon initialization or using a fail-safe protocol like JMS
>>> should be used for that. If I remember correctly, a community member is
>>> already looking into that.
>>>
>>> Kris
>>>
>>> Quoting SBalakrishnan <Sanjay.Balakrishnan at fnis.com>:
>>>
>>>>
>>>> Hi,
>>>>
>>>>
>>>> Looks like this issue and related problems
>>>> have become a show stopper for us.
>>>>
>>>>
>>>>
>>>> The UseCase we are trying to address is recreating inflight Human
>>>> Tasks
>>>> after the engine has been stopped (could be a shutdown or server
>>>> error scenario).
>>>>
>>>> It was noticed that if we do not insert any global variables in the
>>>> session
>>>> ,then we do not see the earlier reported Null pointer exception and
>>>> the
>>>> session load from
>>>> the previous session id goes through.
>>>> (Code snippet below)
>>>>
>>>>
>>>> But then I come to the next question, what type of information does
>>>> the
>>>> session
>>>> carry over (could not find information on it) . Is it only global
>>>> variables
>>>> ?
>>>>
>>>>
>>>> Also what happens to the informaton tied to the registered handlers.
>>>> In this case all the task event registrations in the human task
>>>> handler(CommandBasedWSHumanTaskHandler)
>>>> are lost.As a result it is noticed that it leads to tasks getting
>>>> completed
>>>> on the
>>>> MinaTaskServer, but the Process Flow not knowing about it and leading
>>>> to
>>>> workItems
>>>> remaining open (orphan items).
>>>>
>>>> Please do let us know if you have run into this issue or if you have
>>>> other inputs.
>>>>
>>>>
>>>> Thanks in advance
>>>> Sanjay
>>>>
>>>> /*Commented code to bypass first issue:-*/
>>>>
>>>> Order order = new Order();
>>>> order.setOrderId("Order-" + ++orderCounter);
>>>> order.setCustomerId(customerIdTextField.getText());
>>>> ItemInfo itemInfo = (ItemInfo) itemComboBox.getSelectedItem();
>>>> order.addOrderItem(itemInfo.getItemId(), new
>>>> Integer(amountTextField.getText()), itemInfo.getPrice());
>>>>
>>>> AppData testAppData = new AppData();
>>>> testAppData.setRelationShipPricing("Pricing");
>>>>
>>>> //Commented global variable insert
>>>> //Commented ksession.insert(testAppData);
>>>>
>>>> Map<String, Object> parameters = new HashMap<String, Object>();
>>>> parameters.put("order", order);
>>>> parameters.put("email", emailTextField.getText());
>>>> WorkflowProcessInstance testProcess = (WorkflowProcessInstance)
>>>> ksession.startProcess("RuleSetExample", parameters);
>>>> ksession.fireAllRules();
>>>> this._processId= testProcess.getId();
>>>>
>>>> /*Commented code to bypass first issue:-*/
>>>>
>>>>
>>>> SBalakrishnan wrote:
>>>> >
>>>> > Kris,
>>>> >
>>>> > Did download the artifacts (drools-5.1.0.SNAPSHOT-bin.zip)
>>>> > from the above location but ran into the same issue reported
>>>> earlier.
>>>> >
>>>> >
>>>> /*------------------------------------------------------------------*/
>>>> >
>>>> > java.lang.RuntimeException: Unable to load session snapshot
>>>> > at
>>>> >
>>>>
>>> org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:112)
>>>> > at
>>>> >
>>>>
>>> org.drools.persistence.session.JPASessionMarshallingHelper.<init>(JPASessionMarshallingHelper.java:46)
>>>> > at
>>>> >
>>>>
>>> org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:194)
>>>> > at
>>>> >
>>>>
>>> org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:75)
>>>> > at
>>>> >
>>>>
>>> org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102)
>>>> > at
>>>> >
>>>>
>>> org.drools.examples.process.order.OrderExample.createWorkingMemory(OrderExample.java:279)
>>>> > at
>>>> >
>>>>
>>> org.drools.examples.process.order.OrderExample.<init>(OrderExample.java:107)
>>>> > at
>>>> >
>>>> org.drools.examples.process.order.OrderExample.main(OrderExample.java:88)
>>>> > Caused by: java.lang.NullPointerException
>>>> > at
>>>> >
>>>>
>>> org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:496)
>>>> > at
>>>> >
>>>>
>>> org.drools.marshalling.impl.InputMarshaller.readLeftTuples(InputMarshaller.java:426)
>>>> > at
>>>> >
>>>>
>>> org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:349)
>>>> > at
>>>> >
>>>>
>>> org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:207)
>>>> > at
>>>> >
>>>>
>>> org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:75)
>>>> > at
>>>> >
>>>>
>>> org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:104)
>>>> >
>>>> >
>>>> /*------------------------------------------------------------------*/
>>>> >
>>>> >
>>>> > I am creating a JPA session and starting a process
>>>> > with a human task and then stopping the engine without completing
>>>> > the human task .Then trying to load from the earlier session.
>>>> >
>>>> > Am I missing any calls before exit.
>>>> >
>>>> > Appreciate your help,thanks in advance
>>>> >
>>>> > Sanjay
>>>> >
>>>> >
>>>> > Kris Verlaenen wrote:
>>>> >>
>>>> >> We're planning to do a M1 near the end of the month, and a final a
>>>> few
>>>> >> weeks later.
>>>> >>
>>>> >> Kris
>>>> >>
>>>> >> Quoting SBalakrishnan <Sanjay.Balakrishnan at fnis.com>:
>>>> >>
>>>> >>>
>>>> >>> Thanks Kris
>>>> >>>
>>>> >>> Will download from the below link and check.
>>>> >>>
>>>> >>> Quick question, do you know when the official 5.1 release will
>>>> be
>>>> >>> available
>>>> >>> ?
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>>
>>>> >>> Kris Verlaenen wrote:
>>>> >>> >
>>>> >>> > The fix for this issue has been added to trunk about a month
>>>> ago
>>>> >>> already
>>>> >>> > I think, have you already tried with the 5.1.0 SNAPSHOT
>>>> release?
>>>> >>> Does
>>>> >>> > this solve your issue?
>>>> >>> >
>>>> >>> > You can get the snapshot at
>>>> >>> >
>>>> >>>
>>>> https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/
>>>> >>> >
>>>> >>> > Kris
>>>> >>> >
>>>> >>> > Quoting SBalakrishnan <Sanjay.Balakrishnan at fnis.com>:
>>>> >>> >
>>>> >>> >>
>>>> >>> >> Looks like I am running into the same/similar issue while
>>>> >>> recreating
>>>> >>> >> from a
>>>> >>> >> session_id.
>>>> >>> >> Exception pasted below.
>>>> >>> >>
>>>> >>> >> Any idea whether it will be addressed in the coming release ?
>>>> >>> >>
>>>> >>> >>
>>>> >>> >> Thanks in advance..
>>>> >>> >>
>>>> >>> >>
>>>> >>> >> /*--------------------------------------------*/
>>>> >>> >>
>>>> >>> >> Hibernate: select sessioninf0_.id as id0_0_,
>>>> sessioninf0_.dirty
>>>> >>> as
>>>> >>> >> dirty0_0_, sessioninf0_.lastModificationDate as
>>>> lastModi3_0_0_,
>>>> >>> >> sessioninf0_.rulesByteArray as rulesByt4_0_0_,
>>>> >>> sessioninf0_.startDate
>>>> >>> >> as
>>>> >>> >> startDate0_0_ from SessionInfo sessioninf0_ where
>>>> >>> sessioninf0_.id=?
>>>> >>> >> java.lang.RuntimeException: Unable to load session snapshot
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:112)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.persistence.session.JPASessionMarshallingHelper.<init>(JPASessionMarshallingHelper.java:46)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:171)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.loadStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:75)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.persistence.jpa.JPAKnowledgeService.loadStatefulKnowledgeSession(JPAKnowledgeService.java:102)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.examples.process.order.OrderExample.createWorkingMemory(OrderExample.java:257)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.examples.process.order.OrderExample.<init>(OrderExample.java:99)
>>>> >>> >> at
>>>> >>> >>
>>>> >>>
>>>> org.drools.examples.process.order.OrderExample.main(OrderExample.java:80)
>>>> >>> >> Caused by: java.lang.NullPointerException
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:496)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.marshalling.impl.InputMarshaller.readLeftTuples(InputMarshaller.java:426)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.marshalling.impl.InputMarshaller.readFactHandles(InputMarshaller.java:349)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.marshalling.impl.InputMarshaller.readSession(InputMarshaller.java:207)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.marshalling.impl.DefaultMarshaller.unmarshall(DefaultMarshaller.java:75)
>>>> >>> >> at
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> org.drools.persistence.session.JPASessionMarshallingHelper.loadSnapshot(JPASessionMarshallingHelper.java:104)
>>>> >>> >> /*--------------------------------------------*/
>>>> >>> >>
>>>> >>> >>
>>>> >>> >> Mauricio Salatino wrote:
>>>> >>> >> >
>>>> >>> >> > Ok, I will try to take a look at it.. this week..
>>>> >>> >> > I will let you know if I can fix it
>>>> >>> >> >
>>>> >>> >> > 2009/7/28 DroolsUser <rafiuddin.mk at gmail.com>:
>>>> >>> >> >> Mark / salaboy, I am also facing same problem while
>>>> recreate
>>>> >>> the
>>>> >>> >> session
>>>> >>> >> >> from database. Can you advice any alternative, so that I
>>>> can
>>>> >>> go
>>>> >>> >> forward
>>>> >>> >> >> till
>>>> >>> >> >> the next release. Moreover when is the new release is
>>>> .......
>>>> >>> Do
>>>> >>> >> new
>>>> >>> >> >> release
>>>> >>> >> >> will targeting this kind problem? Please suggest any
>>>> >>> alternative
>>>> >>> >> to
>>>> >>> >> >> recreate
>>>> >>> >> >> the session from db. Thanks in advance......
>>>> >>> >> >>
>>>> >>> >> >> gairey wrote:
>>>> >>> >> >> Mark, Done: https://jira.jboss.org/jira/browse/JBRULES-2199
>>>> -
>>>> >>> >> thanks for
>>>> >>> >> >> the
>>>> >>> >> >> quick response. Regards, Alan Mark Proctor Sent by:
>>>> >>> >> >> rules-users-bounces at lists.jboss.org 08/07/2009 13:49
>>>> Please
>>>> >>> >> respond to
>>>> >>> >> >> Rules
>>>> >>> >> >> Users List To Rules Users List cc Subject Re:
>>>> [rules-users]
>>>> >>> >> Problem with
>>>> >>> >> >> JPA
>>>> >>> >> >> session persistence in Drools Flow (5.0.1) Can you open a
>>>> JIRA
>>>> >>> for
>>>> >>> >> this,
>>>> >>> >> >> and
>>>> >>> >> >> we'll make sure it's done in the next few weeks:
>>>> >>> >> >> https://jira.jboss.org/jira/browse/JBRULES thanks Mark
>>>> >>> >> >> Alan.Gairey at tessella.com wrote: I'm currently using Drools
>>>> >>> Flow
>>>> >>> >> with JPA
>>>> >>> >> >> session persistence enabled as described in section 5.1 of
>>>> the
>>>> >>> >> User
>>>> >>> >> >> Guide.
>>>> >>> >> >> As a process executes, session information is saved to the
>>>> H2
>>>> >>> >> database
>>>> >>> >> >> correctly. The problem comes if a process only executes
>>>> part
>>>> >>> way
>>>> >>> >> through,
>>>> >>> >> >> and I then try to finish the process by recreating a
>>>> session
>>>> >>> using
>>>> >>> >> the
>>>> >>> >> >> code:
>>>> >>> >> >> // recreate the session from database using the sessionId
>>>> >>> ksession
>>>> >>> >> =
>>>> >>> >> >> JPAKnowledgeService.loadStatefulKnowledgeSession(
>>>> sessionId,
>>>> >>> >> kbase, null,
>>>> >>> >> >> env ); This gives me a NullPointerException. Having looked
>>>> >>> into
>>>> >>> >> the
>>>> >>> >> >> Drools
>>>> >>> >> >> Flow source code, I think the problem is in the class
>>>> >>> >> >>
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> drools-persistence-jpa\src\main\java\org\drools\persistence\session\SingleSessionCommandService.java.
>>>> >>> >> >> The 4th constructor of this class is called as part of the
>>>> >>> loading
>>>> >>> >> of a
>>>> >>> >> >> knowledge session from the H2 database; this in turn leads
>>>> to
>>>> >>> the
>>>> >>> >> >> afterCompletion method of the inner class
>>>> SynchronizationImpl
>>>> >>> >> being
>>>> >>> >> >> called.
>>>> >>> >> >> The final two lines of this method are:
>>>> >>> >> ((JPAProcessInstanceManager)
>>>> >>> >> >> ((ReteooWorkingMemory)
>>>> >>> >> >>
>>>> session).getProcessInstanceManager()).clearProcessInstances();
>>>> >>> >> >> ((JPAWorkItemManager) ((ReteooWorkingMemory)
>>>> >>> >> >> session).getWorkItemManager()).clearWorkItems(); However,
>>>> when
>>>> >>> >> called via
>>>> >>> >> >> the route described above, the session member variable of
>>>> >>> >> >> SingleSessionCommandService has not been set, thus causing
>>>> the
>>>> >>> >> >> NullPointerException. (Interestingly, running the unit
>>>> tests
>>>> >>> for
>>>> >>> >> >> drools-persistence-jpa does result in the
>>>> NullPointerException
>>>> >>> >> being
>>>> >>> >> >> thrown
>>>> >>> >> >> multiple times, although the tests are still listed as
>>>> having
>>>> >>> >> passed.) I
>>>> >>> >> >> believe enclosing the above two lines as follows will fix
>>>> the
>>>> >>> >> problem: if
>>>> >>> >> >> (session != null) { ((JPAProcessInstanceManager)
>>>> >>> >> ((ReteooWorkingMemory)
>>>> >>> >> >>
>>>> session).getProcessInstanceManager()).clearProcessInstances();
>>>> >>> >> >> ((JPAWorkItemManager) ((ReteooWorkingMemory)
>>>> >>> >> >> session).getWorkItemManager()).clearWorkItems(); } Also,
>>>> in
>>>> >>> the
>>>> >>> >> 4th
>>>> >>> >> >> constructor of SingleSessionCommandService, after the
>>>> session
>>>> >>> has
>>>> >>> >> been
>>>> >>> >> >> set,
>>>> >>> >> >> the following line needs to be added to ensure the session
>>>> id
>>>> >>> is
>>>> >>> >> the same
>>>> >>> >> >> as
>>>> >>> >> >> the session info id: ((ReteooStatefulSession)
>>>> >>> >> this.session).setId(
>>>> >>> >> >> this.sessionInfo.getId() ); (This line is present at the
>>>> end
>>>> >>> of
>>>> >>> >> the 3rd
>>>> >>> >> >> constructor.) It would be great if this fix could make it
>>>> into
>>>> >>> the
>>>> >>> >> Drools
>>>> >>> >> >> 5.1 release. Thanks.
>>>> >>> >> _______________________________________________
>>>> >>> >> >> rules-users mailing list rules-users at lists.jboss.org
>>>> >>> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
>>>> >>> >> >> _______________________________________________
>>>> rules-users
>>>> >>> >> mailing list
>>>> >>> >> >> rules-users at lists.jboss.org
>>>> >>> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
>>>> >>> >> >> _______________________________________________
>>>> rules-users
>>>> >>> >> mailing list
>>>> >>> >> >> rules-users at lists.jboss.org
>>>> >>> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
>>>> >>> >> >>
>>>> >>> >> >> ________________________________
>>>> >>> >> >> View this message in context: Re: Problem with JPA session
>>>> >>> >> persistence in
>>>> >>> >> >> Drools Flow (5.0.1)
>>>> >>> >> >> Sent from the drools - user mailing list archive at
>>>> >>> Nabble.com.
>>>> >>> >> >>
>>>> >>> >> >> _______________________________________________
>>>> >>> >> >> rules-users mailing list
>>>> >>> >> >> rules-users at lists.jboss.org
>>>> >>> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
>>>> >>> >> >>
>>>> >>> >> >>
>>>> >>> >> >
>>>> >>> >> >
>>>> >>> >> >
>>>> >>> >> > --
>>>> >>> >> > - http://salaboy.wordpress.com
>>>> >>> >> > - http://www.jbug.com.ar
>>>> >>> >> > - Salatino "Salaboy" Mauricio -
>>>> >>> >> > _______________________________________________
>>>> >>> >> > rules-users mailing list
>>>> >>> >> > rules-users at lists.jboss.org
>>>> >>> >> > https://lists.jboss.org/mailman/listinfo/rules-users
>>>> >>> >> >
>>>> >>> >> >
>>>> >>> >>
>>>> >>> >> --
>>>> >>> >> View this message in context:
>>>> >>> >>
>>>> >>> >
>>>> >>>
>>>> >>
>>>>
>>> http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow-%285.0.1%29-tp24377236p24909794.html
>>>> >>> >> Sent from the drools - user mailing list archive at
>>>> Nabble.com.
>>>> >>> >>
>>>> >>> >> _______________________________________________
>>>> >>> >> rules-users mailing list
>>>> >>> >> rules-users at lists.jboss.org
>>>> >>> >> https://lists.jboss.org/mailman/listinfo/rules-users
>>>> >>> >>
>>>> >>> >
>>>> >>> >
>>>> >>> >
>>>> >>> >
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>>>> >>> >
>>>> >>> >
>>>> >>>
>>>> >>> --
>>>> >>> View this message in context:
>>>> >>>
>>>> >>
>>>>
>>> http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow-%285.0.1%29-tp24377236p24957542.html
>>>> >>> Sent from the drools - user mailing list archive at Nabble.com.
>>>> >>>
>>>> >>> _______________________________________________
>>>> >>> rules-users mailing list
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>>>> >>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>> >>>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
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>>>> >
>>>> >
>>>>
>>>> --
>>>> View this message in context:
>>>>
>>> http://www.nabble.com/Problem-with-JPA-session-persistence-in-Drools-Flow-%285.0.1%29-tp24377236p25287940.html
>>>> Sent from the drools - user mailing list archive at Nabble.com.
>>>>
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>>>
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>> http://www.nabble.com/file/p25296442/SnapShotDroolsExample.zip
>> SnapShotDroolsExample.zip
>>
>
>
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