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clear session before execute criteria

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cometta

Post subject: clear session before execute criteria

Posted: Sat May 03, 2008 1:53 am

Beginner

Joined: Wed Oct 03, 2007 9:46 pm
Posts: 37

whenever calling criteria, i will clear the session first . the reason i doing this is to ensure whathever records i grab from database is the latest. is there any side effects of too frequent use of clear session?

Code:

Session sess = HibernateSessionFactory.currentSession();
            sess.clear();

            Criteria crit = sess.createCriteria(myClass.class,"class")

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FlukeFan

Post subject: clear session before execute criteria

Posted: Sat May 03, 2008 8:08 am

Senior

Joined: Thu Jun 21, 2007 8:03 am
Posts: 127
Location: UK

Hi,

Clearing the session each time means you won't be able to take advantage of the IdentityMap (sometimes referred to as the 1st level cache).

If there are pending changes that have been made through NHibernate, and the session flush-mode is automatic (the default), then NHibernate is intelligent enough to flush out pending changes before executing the query.

Alternatively you could use session.Flush() before the query to ensure any pending records are written.

Regards,
Richard

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