[jboss-user] [EJB 3.0] - What is the best way to re-attach a detached entity?

[SmokingAPipe]

I have an object called customer.  I'm using Seam, and an EntityManager is injected, and a customer object is successful injected.  I try to merge the customer back like this:

entityManager.merge(customer);

but that does not work, because after that, I do:

if(! entityManager.contains(customer)) log.severe("Oh no it did not work");

Of course, it logs that the entityManager does not contain the customer.

What is the best way to re-attach a detached entity?

Should I do:

customer = entityManager.find(Customer.class, customer.getId());

?

That seems like it would re-attach, but surely there is some method within EntityManager to re-attach a detached entity without doing a find on it?


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