Thanks Kris for your input. It would be great if you could share us on sample code snippet how to acheive this ObjectMarshallingStrategy for ProcessInstances .
Also confirm us by using this approach the process is avialable for drools rule constraints to take decisions. Thanks Prem On Thu, Oct 8, 2009 at 4:07 PM, Kris Verlaenen < [email protected]> wrote: > This is indeed a special case. Process instances are already stored as > part of the session runtime state, so no need to store them again as > part of the working memory. You need to register a custom > ObjectMarshallingStrategy for ProcessInstances in the working memory > that simply retrieves them from the session state. > > Kris > > Quoting PremKumar s <[email protected]>: > > > Hi, > > > > > > > > I am evaluating the drools expert with drool flow using > > TimeManagement > > System. I am inserting the process instance into working memory of > > drools > > [session.insert(workflowProcessInstance)] So that the rules can use > > the > > process instance as part of Rule constraints to enable the rules to > > make > > more sophisticated decisions based on the state of the current > > process > > instance. > > > > > > > > Rule snippet > > > > > > > > rule "Submit Time" ruleflow-group "Submit Time" > > dialect "java" > > when > > > > processInstance:WorkflowProcessInstance() > > > > tkRequest:TKRequest () > > tkRequestDAO:TKRequestDAO() > > then > > > > // check the current processInstance state as > > Active > > then do that > > > > //Do custom operation, status change, > > persistence > > update > > > > end > > > > > > > > The approach is works fine with using > > KnowledgeBuilder.newStatefulKnowledgeSession() that is no > > persistence. But > > once i have enabled the Persistence using > > JPAKnowledgeService.newStatefulKnowledgeSession(know, null, > > getEnvironment()) it throws stack over flow error due the > > workflowProcessInstance is not serialized while trying to persist the > > newly > > added workflowProcessInstance to working memory. > > > > > > > > Once i have commented the > > session.insert(workflowProcessInstance) > > the stack overflow error is gone but none of my rules are not > > executed. > > > > > > > > Can some one provide guidance on how to pass this > > workflowProcessInstance to > > rule constriant with persistence JPAKnowledgeSession enabled. > > > > > > > > Thanks > > > > Prem > > > > > > > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm >
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