I have an EJB where I am saving an object to the database In an example I have seen once this data is saved EntityManager persist there is a call to EntityManager flush Why do I need to do this The object I am saving is not attached and not used later in the method In fact once saved the method returns and I would expect the resources to be released The example code does this on a remove call as well if somecondition entityManager persist unAttachedEntity else attachedEntityObject setId unAttachedEntity getId entityManager flush

What does EntityManager.flush do and why do I need to use it?

The Solution to What does EntityManager.flush do and why do I need to use it? is

A call to EntityManager.flush(); will force the data to be persist in the database immediately as EntityManager.persist() will not (depending on how the EntityManager is configured : FlushModeType (AUTO or COMMIT) by default it's set to AUTO and a flush will be done automatically by if it's set to COMMIT the persitence of the data to the underlying database will be delayed when the transaction is commited).

~ Answered on 2013-07-17 15:21:35

What does EntityManager.flush do and why do I need to use it?

The Solution to What does EntityManager.flush do and why do I need to use it? is

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