[jboss-user] [JBoss jBPM] - using jbpm in EJB bean for testing. please help

[yxyang]

Hi, 
I am new to JBPM. 

what is the error messsage mean? "object references an unsaved transient instance".

I have the following code:

  | public void ejbCreate() throws CreateException {
  | 		log.debug("ejbCreate() is called");
  | 		JbpmConfiguration config = null;
  | 		try {
  | 			InitialContext ic = new InitialContext();
  | 			config = (JbpmConfiguration) ic
  | 					.lookup("java:/jbpm/JbpmConfiguration");
  | 			JbpmContext context = config.createJbpmContext();
  | 			  log.debug("config="+config);
  | 
  | 			 ProcessDefinition processDefinition = ProcessDefinition.parseXmlString(
  | 					    "<process-definition>" +
  | 					    "  <start-state>" +
  | 					    "    <transition to='s' />" +
  | 					    "  </start-state>" +
  | 					    "  <state name='s'>" +
  | 					    "    <transition to='end' />" +
  | 					    "  </state>" +
  | 					    "  <end-state name='end' />" +
  | 					    "</process-definition>"
  | 					  );
  | 					  
  | 					  // The next line creates one execution of the process definition.
  | 					  // After construction, the process execution has one main path
  | 					  // of execution (=the root token) that is positioned in the
  | 					  // start-state.
  | 					  ProcessInstance processInstance = 
  | 					      new ProcessInstance(processDefinition);			
  | 					  Token token = processInstance.getRootToken();
  | 					  
  | 					  // Also after construction, the main path of execution is positioned
  | 					  // in the start-state of the process definition.
  | 					  log.debug(""+processDefinition.getStartState().equals(token.getNode()));
  | 					  
  | 					  token.signal();
  | 					  log.debug(""+processDefinition.getNode("s").equals(token.getNode()));
  | 					  token.signal();
  | 					  log.debug(""+processDefinition.getNode("end").equals(token.getNode()));
  | 		} catch (NamingException ne) {
  | 			log
  | 					.error(
  | 							"JbpmConfiguration was not found using JNDI.  Is the SAR setup and deployed?",
  | 							ne);
  | 			throw new CreateException(
  | 					"Cannot find JbpmConfiguration.  Make sure jbpm.sar is configured correctly.");
  | 			// config = JbpmConfiguration.parseResource(SERVICE_CONFIG);
  | 			// try {
  | 			// InitialContext ic = new InitialContext();
  | 			// ic.bind(SERVICE_JNDI, config);
  | 			// } catch (NamingException ne2) {
  | 			// log.error("Unable to bind JbpmConfiguration for services", ne2);
  | 			// throw new CreateException(
  | 			// "Could not bind JbpmConfiguration for services");
  | 			// }
  | 		}
  | 	}
  | 

In addition, i have a servlet to create the instance of this session bean.
But the following error happened:

anonymous wrote : 
  | 16:14:13,981 DEBUG [JbpmServiceManagerBean] true
  | 16:14:13,982 DEBUG [GraphElement] event 'before-signal' on 'State(s)' for 'Token(/)'
  | 16:14:13,982 DEBUG [GraphElement] event 'node-leave' on 'State(s)' for 'Token(/)'
  | 16:14:13,983 DEBUG [GraphElement] event 'transition' on 'Transition(8ab10c)' for 'Token(/)'
  | 16:14:13,983 DEBUG [GraphElement] event 'node-enter' on 'EndState(end)' for 'Token(/)'
  | 16:14:13,984 DEBUG [GraphElement] event 'process-end' on 'ProcessDefinition(6da7d4)' for 'Token(/)'
  | 16:14:13,985 DEBUG [DbPersistenceServiceFactory] creating persistence service
  | 16:14:13,985 DEBUG [DbPersistenceService] creating hibernate session
  | 16:14:13,986 DEBUG [DbPersistenceService] beginning hibernate transaction
  | 16:14:13,996 ERROR [SchedulerSession] org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: org.jbpm.graph.exe.ProcessInstance
  | 16:14:13,998 ERROR [LogInterceptor] EJBException in method: public abstract com.ternary.wirelessthermometer.JbpmServiceManagerLocal com.ternary.wirelessthermometer.JbpmServiceManagerLocalHome.create() throws javax.ejb.CreateException, causedBy:
  | javax.ejb.EJBException: null; CausedByException is:
  | 
  | 

Please help!

yang
Why tr

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