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Resolve PersistenceUnit unitName at runtime [message #1657163]

Sat, 07 March 2015 21:34

Bill Damage

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?

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Re: Resolve PersistenceUnit unitName at runtime [message #1660946 is a reply to message #1657163]

Mon, 09 March 2015 12:06

Petros Splinakis

Messages: 12
Registered: September 2014

Junior Member

You may use javax.persistence.Persistence class to retrieve the EntityManagerFactory for the persistence unit you need.

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Re: Resolve PersistenceUnit unitName at runtime [message #1671021 is a reply to message #1660946]

Fri, 13 March 2015 12:32

Bill Damage

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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