Spring Boot - Handle to Hibernate SessionFactory

Question

Does anyone know how to get a handle the Hibernate SessionFactory that is created by Spring Boot?

Answer 1

You can accomplish this with:

SessionFactory sessionFactory =      entityManagerFactory.unwrap(SessionFactory.class); 

where entityManagerFactory is an JPA EntityManagerFactory.

package net.andreaskluth.hibernatesample;  import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory;  import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component;  @Component public class SomeService {    private SessionFactory hibernateFactory;    @Autowired   public SomeService(EntityManagerFactory factory) {     if(factory.unwrap(SessionFactory.class) == null){       throw new NullPointerException("factory is not a hibernate factory");     }     this.hibernateFactory = factory.unwrap(SessionFactory.class);   }  } 

Answer 2

The simplest and least verbose way to autowire your Hibernate SessionFactory is:

This is the solution for Spring Boot 1.x with Hibernate 4:

application.properties:

spring.jpa.properties.hibernate.current_session_context_class= org.springframework.orm.hibernate4.SpringSessionContext 

Configuration class:

@Bean public HibernateJpaSessionFactoryBean sessionFactory() {     return new HibernateJpaSessionFactoryBean(); } 

Then you can autowire the SessionFactory in your services as usual:

@Autowired private SessionFactory sessionFactory; 

As of Spring Boot 1.5 with Hibernate 5, this is now the preferred way:

application.properties:

spring.jpa.properties.hibernate.current_session_context_class= org.springframework.orm.hibernate5.SpringSessionContext 

Configuration class:

@EnableAutoConfiguration ... ... @Bean public HibernateJpaSessionFactoryBean sessionFactory(EntityManagerFactory emf) {     HibernateJpaSessionFactoryBean fact = new HibernateJpaSessionFactoryBean();     fact.setEntityManagerFactory(emf);     return fact; }