دورة حياة الكيان

في هذا الدرس

name the four states and the moves between them.

الموضوعات المخطط لها

• Transient: new object, not known to JPA.
• Managed: tracked by the persistence context; changes are saved at flush.
• Detached: was managed, but the context closed (usually after the transaction).
• Removed: marked for deletion at flush.
• persist makes transient managed; merge copies a detached state into a managed instance; remove schedules deletion.