Creating an entity manager
The session bean works with the JPA entities to access the ITSOBANK database. We require an entity manager bound to the persistent context.
| Add these definitions to the EJBBankBean class: |
@PersistenceContext (unitName="RAD75JPA",
type=PersistenceContextType.TRANSACTION)
private EntityManager entityMgr;
The @PersistenceContext annotation defines the persistence context unit with transactional behavior. The unit name matches the name in the persistence.xml file in the RAD75JPA project:
<persistence-unit name="RAD75JPA">
The EntityManager instance is used to execute JPA methods to retrieve, insert, update, delete, and query instances.
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| Organize imports (select the javax.persistence package). |
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ibm.com/redbooks |