Queries work, persist does not work, in a Servlet

[smokingapipe]

Strange strange problem:

I have a Servlet. Within this Servlet I get a hold of a EntityManager like this:

Inside of init:

entityManagerFactory = Persistence.createEntityManagerFactory(persistenceContextName);

And then in the doPost() method, I get an actual EntityManager using the obvious entityManagerFactory method.

Strange thing, every time I try to persist an object using this EntityManager, nothing happens. No error, nothing, but nothing is persisted. But I can do queries with it and get the expected results!

Is there any explanation for this? This is all in JBoss 4.0.5.

Thanks

[smokingapipe]

Ha, I figured this out. I need to do

EntityTransaction transaction = entityManager.getTransaction();
transaction.begin();
entityManager.persist(...);
transaction.commit();
entityManager.close();

Is that the right way to do it? It works!