[jboss-user] [JBoss jBPM] - Hibernate Error when persist the outer ProcessInstance.

[kenees]

Hi guys

I'm using JBPM 3.3.0.GA, I have a use case that want to create a new ProcessInstance (name as A) inside an actionHandler of an outer one, the code in the action handler would like this:

  | @Override
  | 	public void execute(ExecutionContext executionContext) throws Exception {
  | 		// get operation context from workflow
  | 		OperationContext context = (OperationContext) executionContext
  | 				.getContextInstance().getTransientVariable(
  | 						Operation.OPERATION_CONTEXT);
  | 		// create discovery operation
  | 		WorkflowOperation discoveryOperation = new WorkflowOperation(context);
  | 		// create discovery related workflow
  | 		ProcessDefinition processDefinition = ProcessDefinition.parseXmlString(definition);
  | 		ProcessInstance processInstance = 
  | 	        new ProcessInstance(processDefinition);
  | 		discoveryOperation.setProcessInstance(processInstance);
  | 
  | 		new JBossCacheServiceFactory().getCacheService(
  | 				CacheRegionConstants.TASK).put(context.getOperationId(),
  | 				discoveryOperation);
  | 		if (logger.isDebugEnabled()) {
  | 			logger.debug("Discovery Operation with Workflow created successfully.");
  | 		}
  | 	}
  | 

For this inner processInstance I didn't do anything like call the save method to make it persisted, and this is also what i expected, because i want to put it in the cache, and the following code show how i created the outer processInstance:


  | public static final void createProcess(OperationContext context) {
  | 		JbpmContext jbpmContext = JbpmConfingurationFactory.jbpmConfiguration
  | 				.createJbpmContext();
  | 		try {
  | 			ProcessDefinition retrievedPd = jbpmContext.getGraphSession()
  | 					.findLatestProcessDefinition(context.getWorkflowName());
  | 			if (retrievedPd == null) {
  | 				logger.error("Can not find Process Definition with name: " + context.getWorkflowName());
  | 				throw new DMException("Can not find Process Definition with name: " + context.getWorkflowName());
  | 			}
  | 			ProcessInstance processInstance = new ProcessInstance(retrievedPd);
  | 			processInstance.setKey(context.getTaskId());
  | 			processInstance.getContextInstance().setTransientVariable(Operation.OPERATION_CONTEXT, context);
  | 			// ready to signal work flow
  | 			processInstance.signal();
  | 			jbpmContext.save(processInstance);
  | 			if (logger.isDebugEnabled()) {
  | 				logger.debug("---------------- create processinstance -----------------");
  | 				logger.debug("---------------- complete [" + context.getTaskId() + "] -----------------");
  | 			}
  | 		} finally {
  | 			jbpmContext.close();
  | 		}
  | 	}
  | 

You see i call the save method and try to make the outer processInstance persisted, so I expect the outer processInstance should be persisted successfully but the inner one shouldn't, because i explicitily call the save method for the outer one not for the inner one, this make sense to me and i think it's a correct logic, but when i close the jbpmContext, i got the following error:
 
  | 10:36:36,392 ERROR [DbPersistenceService] hibernate commit failed
  | org.hibernate.TransientObjectException: object references an unsaved transient instance - save the t
  | ransient instance before flushing: org.jbpm.graph.def.Node
  |         at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:219)
  |         at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397)
  |         at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:242)
  |         at org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:597)
  |         at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.
  | java:3128)
  |         at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEven
  | tListener.java:479)
  |         at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEnt
  | ityEventListener.java:204)
  |         at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityE
  | ventListener.java:127)
  |         at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEvent
  | Listener.java:196)
  |         at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(Abstrac
  | tFlushingEventListener.java:76)
  |         at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:
  | 26)
  |         at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
  |         at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
  |         at org.hibernate.transaction.JTATransaction.commit(JTATransaction.java:135)
  |         at org.jbpm.persistence.db.DbPersistenceService.commit(DbPersistenceService.java:262)
  |         at org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:218)
  |         at org.jbpm.svc.Services.close(Services.java:236)
  |         at org.jbpm.JbpmContext.close(JbpmContext.java:136)
  | 
  | 

So, please tell me, did i miss something? Thank you very very much.

P.S. I post a similar topic yesterday, but it's not as clear as this one, so i post this new one.

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