what is the purpose and activity of SessionFactory in
hibernate?
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Answer / 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.
| Is This Answer Correct ? | 71 Yes | 11 No |
Answer / srikanth
To Create Session object to use hibernate in an
application SessionFactory is required.
When buildSessionFactory()method is called hibernate
decides about various sql statements,that has to be used to
access various tables and creates SeessionFactory object.
This operation is expensive and it should be used only once.
| Is This Answer Correct ? | 54 Yes | 20 No |
Answer / yograj pandey
SessionFactory is Hibernate's concept of a single datastore
and is threadsafe so that many threads can access it
concurrently and request for sessions and immutable cache of
compiled mappings for a single database. A SessionFactory is
usually only built once at startup. SessionFactory should be
wrapped in some kind of singleton so that it can be easily
accessed in an application code.
SessionFactory sessionFactory = new
Configuration().configure().buildSessionfactory();
| Is This Answer Correct ? | 28 Yes | 6 No |
Answer / ram nidadavolu
Application obtains session instances from Session Factory.
Only single SessionFactory for the whole application.
SessionFactory caches generate SQL statements and other
mapping metadata that Hibernate uses at runtime.
Cached data that has been read in one unit of work and may
be reused in a future unit of work.
SessionFactory sessionFactory =
Configuration.buildSessionFactory();
| Is This Answer Correct ? | 29 Yes | 20 No |
Answer / jadab
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.
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / rajan
To Create Session object to use hibernate in an
application SessionFactory is required.
When buildSessionFactory()method is called hibernate
decides about various sql statements,that has to be used to
access various tables and creates SeessionFactory object.
This operation is expensive and it should be used only once.
| Is This Answer Correct ? | 8 Yes | 7 No |
Answer / soumya ranjan
The main contract here is the creation of Session instances. Usually an application has a single SessionFactory instance and threads servicing client requests obtain Session instances from this factory.
The internal state of a SessionFactory is immutable. Once it is created this internal state is set. This internal state includes all of the metadata about Object/Relational Mapping.
Implementors must be threadsafe.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / pvc
Configure() is used for the parsing the xml file.It will
used the DOM Parser for parsing
| Is This Answer Correct ? | 5 Yes | 8 No |
Answer / ankur
Configuration object is used to create a SessionFactory object which inturn configures Hibernate for the application using the supplied configuration file and allows for a Session object to be instantiated. The SessionFactory is a thread safe object and used by all the threads of an application.
The SessionFactory is is heavyweight object so usually it is created during application start up and kept for later use. You would need one SessionFactory object per database using a separate configuration file. So if you are using multiple databases then you would have to create multiple SessionFactory objects.
| Is This Answer Correct ? | 2 Yes | 5 No |
Answer / madhan kumar
Session factory is used to access the various tables.it is
expensive and it should be used only once.
| Is This Answer Correct ? | 3 Yes | 7 No |
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