Why HibernateSession.flush()

Reference:

http://docs.jboss.org/hibernate/core/3.3/reference/en/html/objectstate.html#objectstate-flushing

Default behavior:

Flushing the session forces Hibernate to synchronize the in-memory state of the session with the database but does not commit the changes to database.

Usage:

• To force database validation (database constraints) and handle the error no need to wait until commit
• To check duplicate (Force the row to be inserted)
• To get an assigned id
• To update the size of session