[jboss-user] [jBPM] - one of the ways to integrate JPA/Spring with jBPM

[O S]

O S [http://community.jboss.org/people/gelos] created the discussion

"one of the ways to integrate JPA/Spring with jBPM"

To view the discussion, visit: http://community.jboss.org/message/539262#539262

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I tried to research this before on this forum and I don't think that there is a consensus on how to make jBPM to work seamlessly with JPA/Spring
We implemented an approach that works for us and I figured I will describe it here and see if there is any feedback from the community

thanks,
gelos

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- problem overview
  - when JPA/Spring is used the desire is to make jBPM to join JPA transactions seamlessly
  - the issue boils down to Hibernate sessions - how to inject sessions managed by Spring to jBPM
  - Spring manages EntityManagerFactory and EntityManager objects and a common approach (which we use) is to use @PersistenceContext() annotation in DAO objects and have Spring inject EntityManager instances (which are wrappers around Hibernate sessions) into DAOs
  - so we need to get a hold of EntityManager, get the underlying Hibernate session and provide it to jBPM when it asks for it

- solution overview
  - implement custom jBPM wire object for HibernateSession
  - in the object descriptor make a call to a bridge object that uses @PersistenceContext() and is managed by Spring and get Hibernate session from it every time jBPM needs it

see the attached files for details. code has comments in it

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