Managing an Entity Instance’s Lifecycle

You manage entity instances by invoking operations on the entity by means of an EntityManager instance. Entity instances are in one of four states: new, managed, detached, or removed.

• New entity instances have no persistent identity and are not yet associated with a persistence context.

• Managed entity instances have a persistent identity and are associated with a persistence context.

• Detached entity instances have a persistent identity and are not currently associated with a persistence context.

• Removed entity instances have a persistent identity, are associated with a persistent context, and are scheduled for removal from the data store.