Why sessionfactory is used in hibernate

SessionFactory is an interface. SessionFactory can be created by providing Configuration object, which will contain all DB related property details pulled from either hibernate. SessionFactory is a factory for Session objects. We can create one SessionFactory implementation per database in any application. If your application is referring to multiple databases, then you need to create one SessionFactory per database.

The SessionFactory is a heavyweight object; it is usually created during application start up and kept for later use. The SessionFactory is a thread safe object and used by all the threads of an application. I'm Nataraja Gootooru, programmer by profession and passionate about technologies. In any application, one can create an implementation of one sessionFactory per each database. If the application refers to multiple such databases, then one needs to create a SessionFactory per each database.

This is considered as a heavy weight object. During application startup, this is created and is kept for usage. It is a thread-safe object used by the threads of the application. Exception in thread "main" org. The session object gets closed, once the sessionFactory gets closed. Session objects of hibernate are never thread safe.

Also, it is relatively faster to open a new session. Example for Hibernate SessionFactory is given below : package com. SessionFactory; import org. HibernateUtility; import org. R Programming. React Native.

Python Design Patterns. Python Pillow. Python Turtle. Verbal Ability. Interview Questions. Company Questions. Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System. Once the session factory is closed, this session object gets closed.

Hibernate Session objects are not thread safe, so we should not use it in multi-threaded environment. Hibernate SessionFactory openSession method always opens a new session.

We should close this session object once we are done with all the database operations. We should open a new session for each request in multi-threaded environment.

For web application frameworks, we can choose to open a new session for each request or for each session based on the requirement. There is another overloaded method where we can pass java. Connection object to get a stateless session object from hibernate. Collections are also ignored by a stateless session.

However, stateless session can be a good fit in certain situations. Your explanation put me into curiosity that how in multithreading, getCurrentSeasson method will create problem.