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Home » Eclipse Projects » EclipseLink » Resolve PersistenceUnit unitName at runtime
Resolve PersistenceUnit unitName at runtime [message #1657163] Sat, 07 March 2015 21:34 Go to next message
Bill Damage is currently offline Bill DamageFriend
Messages: 5
Registered: February 2015
Junior Member
I currently use

@PersistenceUnit(unitName="foo")
private EntityManagerFactory emf;

And em = emf.createEntityManager(); to get the em instance. Now I need to pass that unitName as a runtime param - how do I go about this please?
Re: Resolve PersistenceUnit unitName at runtime [message #1660946 is a reply to message #1657163] Mon, 09 March 2015 12:06 Go to previous messageGo to next message
Petros Splinakis is currently offline Petros SplinakisFriend
Messages: 12
Registered: September 2014
Junior Member
You may use javax.persistence.Persistence class to retrieve the EntityManagerFactory for the persistence unit you need.
Re: Resolve PersistenceUnit unitName at runtime [message #1671021 is a reply to message #1660946] Fri, 13 March 2015 12:32 Go to previous message
Bill Damage is currently offline Bill DamageFriend
Messages: 5
Registered: February 2015
Junior Member
Thanks!
Used this after removing the @PersistenceUnit annotation and its fine:
emf = Persistence.createEntityManagerFactory("db");
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