How to start transaction on em retrieved from jndi?

[allanjun]

Hi all,

I'm using JBoss and exposing entity manager factory in globle jndi, so that any POJO can use it.

So, I have the following in persistence.xml

<property name="jboss.entity.manager.factory.jndi.name" value="java:/managerFactory"/>

Then in pojo I get the factory from Jndi lookup and create an em from it.

But when I try to persist something from the em, it says no transaction, and if I  use em.getTransaction().begin(), it says something like, it's a JTA em can't start transaction.

How do I persist from the entity manager that was retrieved from the Jndi then? A further question is, if there is an existing EJB tx available, is that possiable to get it propagated into this em?

Thx.

[swd847]

try entityManager.joinTransction()

[allanjun]

Thanks very much Stuart.

That's exactly what I wanted.