jbpmContext.getGraphSession() returns null

[naeem.jamil]

Can any one help me in this regard?
My java code is given below.
JbpmContext jbpmContext = JbpmConfiguration.getInstance().createJbpmContext();

GraphSession gs = jbpmContext.getGraphSession();

System shows gs is null. Please if any one know why it returns gs null? please send me any suggestions on this?

[bradsdavis]

I am not sure about your configuration, but the internals of getGraphSession as as follows:

 public GraphSession getGraphSession()
 {
 PersistenceService persistenceService = getPersistenceService();
 return (persistenceService != null ? persistenceService.getGraphSession() : null);
 }

I would imagine your root cause is because getPersistenceService is returning null.

Check to make sure you have something like the following in your jbpm configuration file.

<service name="persistence" factory="org.jbpm.persistence.jta.JtaDbPersistenceServiceFactory" />