Facade pattern SessionFactory in Hibernate framework

SessionFactory is an implementation of Facade pattern in Hibernate framework. It is one of the core interfaces of Hibernate, responsible for creating Session objects, managing Hibernate configuration, and connecting to the database. By using SessionFactory, it is possible to encapsulate the Hibernate framework and provide a simple and easy-to-use interface for applications to use. The complete source code of SessionFactory is as follows: public interface SessionFactory { //Get the Session object in the current thread Session getCurrentSession() throws HibernateException; //Open a new Session object Session openSession() throws HibernateException; //Close SessionFactory void close() throws HibernateException; //Obtain the configuration of this SessionFactory SessionFactoryOptions getSessionFactoryOptions(); //Obtain statistical information for this SessionFactory Statistics getStatistics(); //Obtain the FilterFilterDefinitionRegistry for this SessionFactory FilterDefinition getFilterDefinition(String filterName) throws HibernateException; //Determine if the filter is included boolean containsFetchProfileDefinition(String name); //Get FetchProfileDefinition FetchProfile getFetchProfile(String name) throws HibernateException; //Get all FetchProfileDefinitions Map<String, FetchProfile> getFetchProfiles(); //Obtain the provider of this SessionFactory ServiceRegistryImplementor getServiceRegistry(); } Summary: The role of Facade pattern is to provide an interface to simplify complex systems, hide the internal complexity, and make the client more convenient to use the system. As the Facade pattern in Hibernate framework, SessionFactory encapsulates the creation of complex Session objects and the connection management with databases. By providing simple interfaces for applications, developers can focus more on the development of business logic rather than the specific implementation details of the underlying. This can improve development efficiency while also improving the maintainability and scalability of the system.