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Obtaining a PersistenceContext in Java EE

 
Joe Harry
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Guys,

What is the deal with obtaining a PersistenceContext using @PersistencContext annotation and what difference or a performance overhead it is when I say the following,



 
Amandeep Singh
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the first one is managed by the application and the second one by container.

So you can conclude the container managed persistence context is more efficient in it's operation's.
 
Joe Harry
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But even in the line,



it is the contaner that performs the DI. So dosn't that mean that it is managed by the container?
 
Ralph Jaus
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In this case the entity manager factory is managed by the container, but not the entity manager itself.

As a remark concerning performance aspects: I was once told on glassfish forum that creating an entity manager is a lightweight operation.
 
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