The work in this section can be split into several sections.

• Enhancing your persistable classes
• Generating the tables for the database schema when you are using a new schema
• With JDO you need to create a PersistenceManagerFactory to connect to a datastore
• With JDO you need to create a PersistenceManager to provide the interface to persisting/accessing objects
• With JPA you need to create an EntityManagerFactory to connect to a datastore
• With JPA you need to create an EntityManager to provide the interface to persisting/accessing objects
• Controlling transactions
• Accessing persisted object via queries (JDO), using JDOQL (JDO), SQL (JDO), JPQL (JPA), SQL (JPA)
• Refining the persistence process to improve performance, maybe using caching
• Logging of the persistence process