[eclipselink-users] Small clarification needed on server session usage

[Rohit Banga <rohit.banga@xxxxxxxxxx>]

Hi All

Based on the wiki we have the following facts:

1. A database session should typically be used with a two tier application.


2. For three tier applications we should get a server session from EntityManagerFactory and then for each subsequent request we should acquire a client session and then if required a unit of work from the client session; subsequently releasing the client session. This allows us to reuse connections pooled by the server session.

But what happens when we use a third party datasource. The connection pool is not owned by the server session. so each acquireClientSession() will request a connection from the datasource. In this case does it really matter whether we use a database session or a server session?

As a side note, in some of the previous posts I have read that an EntityManager is not thread safe. What about server session? Is it thread safe?


Thanks
Rohit Banga