What is SessionFactory in Hibernate?

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.

Is Hibernate template deprecated?

Hence, for newly started projects, consider adopting the standard Hibernate style of coding against SessionFactory. The remaining operations on this HibernateTemplate are deprecated in the meantime and primarily exist as a migration helper for older Hibernate 3. x/4. x data access code in existing applications.

Which interface is implemented by Hibernate template?

HibernateCallback interface
HibernateTemplate is typically used to implement data access or business logic services. The central method is execute(), that supports the Hibernate code that implements HibernateCallback interface. Define HibernateTemplate.

How do I create a SessionFactory in Hibernate?

The SessionFactory must be provided with JDBC connection properties in one of the following ways:

  1. Pass an instance of java. util.
  2. Place hibernate. properties in a root directory of the classpath.
  3. Set System properties using java -Dproperty=value.
  4. Include elements in hibernate. cfg.

What is Session and SessionFactory?

SessionFactory is a factory class for Session objects. It is available for the whole application while a Session is only available for particular transaction. Session is short-lived while SessionFactory objects are long-lived. SessionFactory provides a second level cache and Session provides a first level cache.

How do you create a SessionFactory object?

To create a SessionFactory we can define the configuration in hibernate. properties , hibernate. cfg. xml or create it programmatically.

What is deprecated in Hibernate?

No, there is no way that Hibernate is deprecated. There is the JPA which is a persistence specification and Hibernate implements it. Also Hibernate has its own advanced features that JPA does not have and that’s why Hibernate is the main source of new features that are added to the JPA standard.

What is HibernateDaoSupport in spring?

public abstract class HibernateDaoSupport extends DaoSupport. Convenient super class for Hibernate-based data access objects. Requires a SessionFactory to be set, providing a HibernateTemplate based on it to subclasses through the getHibernateTemplate() method.

What is SessionFactory spring boot?

Spring Boot + Hibernate 5 + Mysql Example. The dao class will have sessionFactory injected which will be used to create hibernate session and connect to database. We will be using mysql database.

Which Hibernate object is injected into Dao class?

Hibernate SessionFactory
Instead, the Hibernate SessionFactory is injected directly in the DAO, and will have the role of the main Hibernate API, through the contextual Session it exposes: this.

Which object is used to create SessionFactory objects hibernate?

Configuration object
Configuration object is used to create a SessionFactory object.

What is SessionFactory in spring?

The SessionFactory interface serves as factory for TopLink Sessions, allowing for dependency injection on thread-safe TopLink-based DAOs. Note that this interface does not depend on any other Spring interfaces or classes, to allow for keeping TopLink-based DAOs as independent as possible.

What is Session object in hibernate?

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. The session objects should not be kept open for a long time because they are not usually thread safe and they should be created and destroyed them as needed.

What is Hibernate session?

The Hibernate session is a cache. It caches entities read from the database, and it also caches changes you’ve made to entities it contains, as well as added and removed entities, until the session is flushed (i.e. all the pending changes are written to the database). A session is said dirty when some changes have not been flushed yet.

Is Hibernate session object is thread-safe?

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.

What is hibernate configuration?

Hibernate – Configuration. Hibernate requires to know in advance — where to find the mapping information that defines how your Java classes relate to the database tables. Hibernate also requires a set of configuration settings related to database and other related parameters.