Spring-data-jpa storing blob

Question

What is \"best\" or canonical way to store entity with blob using spring-data-jpa?

@Entity
public class Entity {
  @Id
  private Long id;
  @Lob()
  private Blob         


        

Answer 1

I had a little problems to get current session factory like in answers above (got for example errors like: Could not obtain transaction-synchronized Session for current thread) . Finally (in Spring Boot application, currently 2.3.1.RELEASE version, Hibernate 5.4.1) i'm using approach like below and my problems has solved.

@Component
public class SomeService {

    /**
     * inject entity manager
     */
    @PersistenceContext 
    private EntityManager entityManager;

    @Transactional
    public void storeMethod(File file) {
       // ...
       FileInputStream in = new FileInputStream(file);

       Session session = entityManager.unwrap(Session.class);
       Blob blob = session.getLobHelper().createBlob(in, file.length());
       // ...
       entity.setData(blob);
       repo.save(entity);
    }
}