What is the use of LocalSessionFactoryBean?

Class LocalSessionFactoryBean. FactoryBean that creates a Hibernate SessionFactory . This is the usual way to set up a shared Hibernate SessionFactory in a Spring application context; the SessionFactory can then be passed to Hibernate-based data access objects via dependency injection.

What configuration does LocalSessionFactoryBean support?

Configuration settings can either be read from a Hibernate XML file, specified as “configLocation”, or completely via this class. A typical local configuration consists of one or more “mappingResources”, various “hibernateProperties” (not strictly necessary), and a “dataSource” that the SessionFactory should use.

What is local SessionFactory Bean?

This Hibernate-specific LocalSessionFactoryBean can be an immediate alternative to LocalContainerEntityManagerFactoryBean for common JPA purposes: In particular with Hibernate 5.3/5.4, the Hibernate SessionFactory will natively expose the JPA EntityManagerFactory interface as well, and Hibernate BeanContainer …

Which one of the listed properties is configured under the LocalSessionFactoryBean?

LocalSessionFactoryBean uses three properties: datasource, mappingResources, and hibernateProperties. These properties are as follows: datasource refers to a JDBC DataSource object that is already defined as another bean inside the container.

What is DriverManagerDataSource in spring?

Class DriverManagerDataSource. Simple implementation of the standard JDBC DataSource interface, configuring the plain old JDBC DriverManager via bean properties, and returning a new Connection from every getConnection call. NOTE: This class is not an actual connection pool; it does not actually pool Connections.

What is the use of HibernateTransactionManager?

HibernateTransactionManager allows bulk update and bulk insert and ensures data integrity. HibernateTransactionManager is configured in application.

What are the different Spring frameworks?

The Spring framework consists of seven modules which are shown in the above Figure. These modules are Spring Core, Spring AOP, Spring Web MVC, Spring DAO, Spring ORM, Spring context, and Spring Web flow.

What is Java-based configuration?

Java-based configuration option enables you to write most of your Spring configuration without XML but with the help of few Java-based annotations explained in this chapter.

What is the use of LocalContainerEntityManagerFactoryBean?

LocalContainerEntityManagerFactoryBean produces a container-managed EntityManagerFactory. The JPA specification defines two kinds of entity managers: Application-managed—Entity managers are created when an application directly requests one from an entity manager factory.

How could you externalize constants from a spring configuration file?

You can use properties files, YAML files, environment variables and command-line arguments to externalize configuration. Property values can be injected directly into your beans using the @Value annotation, accessed via Spring’s Environment abstraction or bound to structured objects.

What is the use of DriverManagerDataSource?

NOTE: DriverManagerDataSource is primarily intended for accessing pre-registered JDBC drivers. If you need to register a new driver, consider using SimpleDriverDataSource instead. Alternatively, consider initializing the JDBC driver yourself before instantiating this DataSource.

What is the difference between BasicDataSource and DriverManagerDataSource?

If each request is a DB call, DriverManagerDataSource cannot perform well. So we have to go for some other datasource which gives you Connection pooling mechanism….DriverManagerDataSource Vs BasicDataSource.

Test Case	DriverManagerDataSource(time taken to load the page )	BasicDataSource(time taken to load the page )
hit the page	128 seconds	37 seconds

What is localsessionfactorybean in Spring Boot?

The Spring container recognizes that LocalSessionFactoryBean implements the FactoryBean interface, and thus treats this bean specially: An instance of LocalSessionFactoryBean is instantiated, but instead of being directly returned, instead the getObject () method is invoked.

What is @BEAN annotation in Salesforce?

@Bean. @Bean is a method-level annotation and a direct analog of the XML element. The annotation supports most of the attributes offered by , such as: init-method, destroy-method, autowiring, lazy-init, dependency-check, depends-on and scope.

How do I declare a bean in javaconfig?

To declare a bean, simply annotate a method with the @Bean annotation. When JavaConfig encounters such a method, it will execute that method and register the return value as a bean within a BeanFactory.

What is the use of factorybean in spring spring?

Spring provides many implementations of the FactoryBean interface. Usually these classes are used to support integrations with other frameworks. Take for example org.springframework.orm.hibernate3.LocalSessionFactoryBean.