[jboss-user] [jBPM Users] - [JBPM 4] Process variable

[czujnik]

=== Environment ==============================
- jBPM Version : 4
- Database : Oracle 10g XE
- JDK : 1.5
- Container : standalone App
- Configuration : standard JBPM 4, changed jbpm.hibernate.cfg.xml, added line for Hibernate entity mapping class:
 <mapping resource="pl/test/jbpm/entity/Persisted.hbm.xml" />

=== Process ==================================
Process from example: Comments

=== API ===================================
ExecutionService executionService = procEngine.getExecutionService();
		
		Map<String, Object> variables = new HashMap<String, Object>();
		Persisted p = new Persisted();
		p.setName("Variable");
		p.setValue("Value");
		
		SessionFactory sf = procEngine.get(SessionFactory.class);
		Session sess = sf.openSession();
		sess.beginTransaction();
		sess.save(p);
		sess.flush();
		sess.getTransaction().commit();
		
		variables.put("content", "java");
		           
		ProcessInstance processInstance = executionService.startProcessInstanceByKey("TaskVariables", variables);
		executionService.setVariable(processInstance.getId(), "persistence", p);

=== Stacktrace ==============================
Exception in thread "main" org.hibernate.HibernateException: instance not of expected entity type: org.jbpm.pvm.internal.type.variable.UnpersistableVariable is not a: org.jbpm.pvm.internal.type.Variable
	at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassEntityPersister(AbstractEntityPersister.java:3663)
	at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1374)
	at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:203)
	at org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:535)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:103)
	at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
	at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:534)
	at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:526)
	at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:241)
	at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:291)
	at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:239)
	at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:192)
	at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:319)
	at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:265)
	at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:242)
	at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:192)
	at org.hibernate.engine.Cascade.cascade(Cascade.java:153)
	at org.hibernate.event.def.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:154)
	at org.hibernate.event.def.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:145)
	at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:88)
	at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:49)
	at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
	at org.jbpm.pvm.internal.tx.HibernateSessionResource.prepare(HibernateSessionResource.java:54)
	at org.jbpm.pvm.internal.tx.StandardTransaction.commit(StandardTransaction.java:106)
	at org.jbpm.pvm.internal.tx.StandardTransaction.complete(StandardTransaction.java:65)
	at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:61)
	at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:54)
	at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
	at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.setVariable(ExecutionServiceImpl.java:145)
	at pl.test.jbpm.Main.main(Main.java:63)

=== Debug logs ==============================
[ScopeInstanceImpl] create variable 'persistence-id' in 'execution[TaskVariables.342]' with value 'pl.test.jbpm.entity.Persisted at 970c0e'

=== Problem description =========================
Persistent is a hibernate entity class (configured using XML). The problem is when i'm trying to set hibernate entity as process variable i got exception as above :(
I have no problem to store simple variable as String or Long or even as Serializable class, but for my application i have to store variable as whole entity (in table in DB). 
Can You help me with my problem? Did i missed some configuration? Maybe anyone can point complete example of store process variable in DB table ?

Thanks 
Czujnik

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