[jboss-user] [jBPM] - Is SessionID & ProcessID required to complete WorkItem ?

vikas jadon [http://community.jboss.org/people/vikasjadon] created the discussion "Is SessionID & ProcessID required to complete WorkItem ?" To view the discussion, visit: http://community.jboss.org/message/602740#602740 -------------------------------------------------------------- I have question about  ProcessID and SessionID and there usage. I will continue to ask after explaining the confusion areas. This is with respect to webapplication, used by multiple users and deployed in clustered env. EntityManagerFactory emf =  Persistence.createEntityManagerFactory( "org.drools.persistence.jpa" );    env = KnowledgeBaseFactory.newEnvironment();    env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf ); // create a new knowledge session that uses JPA to store the runtime state. Is this session for the server or I can create per user ? What is best? // i understand creation session per user will be costly ksession =   JPAKnowledgeService.newStatefulKnowledgeSession( kBase, null, env ); sessionID = ksession.getId();  // i can persist this,  ksession.getWorkItemManager().registerWorkItemHandler("handle",my_handler_obj); ksession.getWorkItemManager().registerWorkItemHandler("handle2",my_handler2_obj); //starting the process, I think this is for each user pi1 =(WorkflowProcessInstance) ksession.startProcess("com.sample.bpmn.wfPOC",parameterMap); // i can get process id of the process started, so i am in the first workItem now. processID = pi1.getId(); // i can persist this too. // i have a method in my handler for getting the workItemId. i persisted this workItemId workItemId = my_handler_obj.getWorkItemId(); At some time later I would like to complete the workItem, understanding the server is restarted // I can use JPAKnowledgeService.loadStatefulKnowledgeSession(persisted_sessionID, kBase, null, env); but following also works ksession =   JPAKnowledgeService.newStatefulKnowledgeSession( kBase, null, env ); sessionID = ksession.getId();  // it is different session ksession.getWorkItemManager().registerWorkItemHandler("handle",my_handler_obj); ksession.getWorkItemManager().registerWorkItemHandler("handle2",my_handler2_obj); // I can complete workItem which was left earlier, ksession.getWorkItemManager().completeWorkItem(workItemId, null); *My questions:* ** 1. What is the use of sessionID, since i can complete workItem without sessionID? is if useful in this scenerio ? (I can load the session) 2. What is the use of processID since i can complete workItem without processID?? is it useful in this scenerio ? (i can start the process with process id) 3. Is only workItemID sufficient to complete a workItem in realtime? or am i missing something 4. How the knowledge session will work in case of clustered env across the JVM's using the load balancer. Any help is highly appreciated. thanks Vikas -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/602740#602740] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]