Fabio Spiga [http://community.jboss.org/people/Spiga] created the discussion

"Lazy loading of sub-process"

To view the discussion, visit: http://community.jboss.org/message/553601#553601

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Hi all,
I have a problem in getting a subprocess reference from the main process 
instance.
My code is the following:

ProcessInstance processInstance = 
executionService.startProcessInstanceByKey("RPG");
ExecutionImpl ex_pi = ((ExecutionImpl) 
processInstance).findActiveExecutionIn("integr_doc");
ProcessInstance sub_pi = ex_pi.getSubProcessInstance();    
assertNotNull(sub_pi);

where "integr_doc" is the name of a subprocess

The call to "getSubProcessInstance()" is succesful, but the object "sub_pi" 
throws an Exception if I try to read any property of it because it was lazy 
initialized and the session has been closed.

I get the following exception:

org.hibernate.LazyInitializationException <init>
GRAVE: could not initialize proxy - no Session
org.hibernate.LazyInitializationException: could not initialize proxy - no 
Session

In order to resolve this problem, I have found only one solution: modifying the 
"jbpm.execution.hbm.xml" in "jbpm.jar" by adding the attribute "lazy=false" to 
the foreign-key "FK_EXEC_SUBPI".
This is a very awful solution because I had to modify the original library!
If I put a copy of "jbpm.execution.hbm.xml" in the classpath (in order to not 
modify the original library), JBoss AS try to map jBPM entity beans before the 
related classes are loaded, so it fails to start.

Is there a way to get a subprocess instance more gracefully?

Thank you in advance and sorry for my long thread...

Fabio

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