Is that possible to create a non-persisted ProcessInstance i

[kenees]

The question is that I want to create a new ProcessInstance inside an outer ProcessInstance, actually this creation (new) operation is done in the ActionHandler of the outer ProcessInstance, the key is that the outer one is a persisted one, but I don't want the inner one to be persisted. So I got the following exception when I try to close the jbpmContext:

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)

The code is as below:
The outer one:

JbpmContext jbpmContext = JbpmConfingurationFactory.jbpmConfiguration
 .createJbpmContext();
 try {
 ...
 ProcessInstance processInstance = new ProcessInstance(retrievedPd);
 jbpmContext.save(processInstance);
 }
 } finally {
 jbpmContext.close(); //where I get the exception
 }

One ActionHandler of the outer one which expect to create a new ProcessInstance:

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);
 ....

Can anybody tell me why I got this error, is there any possible workaround?

[boercher]

Have you tried to remove the offending object(s) from the Hibernate session? I don't know if it is possible to access it in the right moment but I would try

jbpmContext.getSession().evict(processInstance)

(or the like)

BTW: Doesn't it help to omit the call to jbpmContext.save() ?

Volker

[kenees]

"boercher" wrote:
Have you tried to remove the offending object(s) from the Hibernate session? I don't know if it is possible to access it in the right moment but I would try

jbpmContext.getSession().evict(processInstance)

(or the like)

BTW: Doesn't it help to omit the call to jbpmContext.save() ?

Volker

Hi Volker, I will try it, but it sounds like a hack? It seems I can and JBPM provides the ability to specify what process instances should be saved and what shouldn't.

[kenees]

Hi Volker

Unfortunately, your hack doesn't work, I got a more serious exception:

17:41:04,598 ERROR [AssertionFailure] an assertion failure occured (this may indicate a bug in Hiber
nate, but is more likely due to unsafe use of the session)
org.hibernate.AssertionFailure: possible nonthreadsafe access to session
 at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:64)
 at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
 at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
 at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
 at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingE
ventListener.java:298)
 at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:
27)