How to access Spring Data configured entity manager (factory) in custom implementation

Question

I\'m writing a custom implementation for a Spring Data JPA repository. So I have:

• MyEntityRepositoryCustom => interface with the custom methods

Answer 1

Since version Spring Data JPA 1.9.2 you have access to EntityManager through JpaContext, see: http://docs.spring.io/spring-data/jpa/docs/1.9.2.RELEASE/reference/html/#jpa.misc.jpa-context. Example:

@Component
public class RepositoryUtil
{
    @Autowired
    private JpaContext jpaContext;

    public void deatach(T entity)
    {
        jpaContext.getEntityManagerByManagedType(entity.getClass()).detach(entity);
    }
}

P.S. This approach will not work if you have more than one EntityManager candidate for some Class, see implementation of JpaContext#getEntityManagerByManagedType -> DefaultJpaContext#getEntityManagerByManagedType.