A developer has created an application managed entity manager. Which statement is correct?

Question

Options

• AA new persistence context begins when the entity manager is created.
• BA new persistence context begins when a new JTA transaction begins.
• CA new persistence context begins when the entity manager is invoked in the context o\
• DA new persistence context begins when the entity manager is invoked in the context of a

• A
  73% (19)
• B
  15% (4)
• C
  8% (2)
• D
  4% (1)

Explanation

Application-Managed Entity Managers With an application-managed entity managerthe persistence context is not propagated to application components, and the lifecycle of EntityManager instances is managed by the Application-managed entity managers are used when applications need to access a persistence context that is not propagated with the JTA transaction across EntityManager instances in a particular persistence unit. In this case, each EntityManager creates a new, isolated persistence context. The EntityManager and its associated persistence context are created and destroyed explicitly by the application.

No community discussion yet for this question.