Java EE 8 Cookbook

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Another important piece of code is the following:

@Statefulpublic class UserBean {    @PersistenceContext(unitName = "ch02-jta-pu",                         type = PersistenceContextType.EXTENDED)    private EntityManager em;    ...}

So, here we are defining our PersistenceContext as EXTENDED. It means that this persistence context is bound to the @Stateful bean until it is removed from the container.

The other option is TRANSACTION, which means the persistence context would live only by the time of transaction.