Answer Posted / pranay bhawsar

The SessionFactory is created from a Configuration object, and as its name implies it is a factory for Session
objects.
 
The SessionFactory is an expensive object to create. It, like the Configuration object, is usually created during
application start up. However, unlike the Configuration object, It should be created once and kept for later
use.

The SessionFactory object is used by all the threads of an application. It is a thread safe object. One
SessionFactory object is created per database. Multiple SessionFactory objects (each requiring a separate
Configuration) are created when connecting to multiple databases. The SessionFactory can also provide
caching of persistent objects.

The main use of session factory object is to get the session object for the application.

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