What configuration is supported by the local SessionFactory Bean?
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.
How do you create a SessionFactory?
However, there are times when a Hibernate SessionFactory is required, so here are three ways to create it.
- Build the SessionFactory with hiberante. cfg.
- Create the Hibernate SessionFactory without XML.
- Obtain a local SessionFactory bean from JPA’s EntityManager.
What is a SessionFactory?
The SessionFactory is a thread safe object and used by all the threads of an application. The SessionFactory is a heavyweight object; it is usually created during application start up and kept for later use. You would need one SessionFactory object per database using a separate configuration file.
What is the use of Hibernatetransactionmanager?
This transaction manager is appropriate for applications that use a single Hibernate SessionFactory for transactional data access, but it also supports direct DataSource access within a transaction (i.e. plain JDBC code working with the same DataSource).
Does Spring data JPA use hibernate?
This is the type of code Spring Data JPA helps to avoid. Spring Data JPA is really a set of dependencies that makes it easier to work with a JPA provider. Hibernate is one of several JPA providers. This means you can use Spring Data JPA without using Hibernate (if you really wanted to).
What is the use of @SpringBootApplication?
Spring Boot @SpringBootApplication annotation is used to mark a configuration class that declares one or more @Bean methods and also triggers auto-configuration and component scanning. It’s same as declaring a class with @Configuration, @EnableAutoConfiguration and @ComponentScan annotations.
How do I get SessionFactory objects?
The SessionFactory must be provided with JDBC connection properties in one of the following ways:
- Pass an instance of java. util.
- Place hibernate. properties in a root directory of the classpath.
- Set System properties using java -Dproperty=value.
- Include elements in hibernate. cfg.
Why do we use SessionFactory?
Instances of SessionFactory are thread-safe and typically shared throughout an application. As these objects are heavy weight because they contains the connection information, hibernate configuration information and mapping files,location path. So creating number of instances will make our application heavy weight.
What is the use of Jpatransactionmanager?
This transaction manager is appropriate for applications that use a single JPA EntityManagerFactory for transactional data access. JTA (usually through JtaTransactionManager ) is necessary for accessing multiple transactional resources within the same transaction.
What is @EnableTransactionManagement?
The @EnableTransactionManagement enables annotation-driven transaction management capability. It is used on @Configuration classes. 2. The @EnableTransactionManagement configures traditional, imperative transaction management or reactive transaction management.
What is difference between JPA and Spring data JPA?
Speaking precisely, Spring Data JPA is an add-on for JPA. It provides a framework that works with JPA and provides a complete abstraction over the Data Access Layer. Spring Data JPA brings in the concept of JPA Repositories, a set of Interfaces that defines query methods.
What is the use of @ComponentScan?
One of the most important annotations in spring is @ComponentScan which is used along with the @Configuration annotation to specify the packages that we want to be scanned. @ComponentScan without arguments tells Spring to scan the current package and all of its sub-packages.
What is the use of EnableAutoConfiguration?
The @EnableAutoConfiguration annotation enables Spring Boot to auto-configure the application context. Therefore, it automatically creates and registers beans based on both the included jar files in the classpath and the beans defined by us.
Is SessionFactory synchronized?
Output : The factory method is declared with a synchronised keyword. The two threads call the factory method of factory at the same time, which makes it possible for creating objects of hibernate SessionFactory.
How do I end SessionFactory session?
After each operation, closeSession() will close the session and set the threadLocal object to null. Finally call the closeSessionFactory() . Show activity on this post. SessionFactory: The job of SessionFactory is to handle all the sessions in the application.