Is hibernate SessionFactory thread safe?

Is hibernate SessionFactory thread safe?

The SessionFactory is a thread safe object and used by all the threads of an application. ... 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.

Can we have multiple SessionFactory in hibernate?

hibernate” package. Session factory is long live multithreaded object. Usually one session factory should be created for one database. When you have multiple databases in your application you should create multiple SessionFactory object.

What is SessionFactory in hibernate?

SessionFactory is an Interface which is present in org. hibernate package and it is used to create Session Object. It is immutable and thread-safe in nature. buildSessionFactory() method gathers the meta-data which is in the cfg Object.

What is session in hibernate with example?

Hibernate - Sessions. A Session is used to get a physical connection with a database. The Session object is lightweight and designed to be instantiated each time an interaction is needed with the database. Persistent objects are saved and retrieved through a Session object.

When should I use hibernate and JDBC?

Hibernate is mostly considered for complex apps. JDBC is a much better option, if: If an app is using a simple database that does not require to migrate, or. If the application needs data to be stored in database tables that won't require object-mapping to 2 or 2+ table versions.

How do I get SessionFactory to hibernate?

If you use Hibernate >= 4.3 and JPA >= 2.0 then you can accces the Session from the EntityManager through T EntityManagar#unwrap(Class cls) . From the Session you can obtain the SessionFactory .

How do I get SessionFactory to Hibernate?

If you use Hibernate >= 4.3 and JPA >= 2.0 then you can accces the Session from the EntityManager through T EntityManagar#unwrap(Class cls) . From the Session you can obtain the SessionFactory .

What is difference between EntityManagerFactory and SessionFactory?

Using EntityManagerFactory approach allows us to use callback method annotations like @PrePersist, @PostPersist,@PreUpdate with no extra configuration. Using similar callbacks while using SessionFactory will require extra efforts. Related Hibernate docs can be found here and here.

Can I reuse the session in Hibernate?

Obviously, you can. A hibernate session is more or less a database connection and a cache for database objects. And you can have multiple successive transactions in a single database connection. ... Whether you should or not is a matter of reusing objects from session.

What are the methods of the hibernate SessionFactory?

• The Hibernate Session provides methods such as save, delete and update, all of which are used to perform CRUD -based operations on the database to which the SessionFactory connects. Most applications create a Hibernate SessionFactory singleton that’s cached for the lifecycle of the app because the object is resource-intensive to create.

Why is there no currentsessioncontext in hibernate?

• Exception in thread "main" org.hibernate.HibernateException: No CurrentSessionContext configured! As the object of the session belongs to a hibernate context, we don’t have to close it. The session object gets closed, once the sessionFactory gets closed. Session objects of hibernate are never thread safe.

Is it safe to use Session object in hibernate?

• Session objects of hibernate are never thread safe. This is why we shouldn’t use it in a multi-threaded environment but can be used in a single-threaded environment. Also, it is relatively faster to open a new session. Return the associated Transaction object, by beginning the unit.

Which is the companion class of the hibernate class?

• Hibernate is JBoss’s implementation of the JPA and most applications don’t directly interact with the Hibernate classes. The SessionFactory’s JPA companion class is the EntityManagerFactory, and it’s recommended that modern applications interact with the JPAs as much as possible.