从Spring Boot应用程序访问SessionFactory

Question

我试图访问Hibernate会话工厂,但在提到的行中收到以下错误.

No CurrentSessionContext configured!

码

@Service
@Transactional
public class GenericSearchImpl implements GenericSearch {

    @Autowired
    private EntityManagerFactory entityManagerFactory;

    @Override
    @SuppressWarnings("unchecked")
    public <T> List<T> search(final Class<T> type, final String[] criteriaList, final int page, final int perPage) {
        Session session = getSession();
        ...
    }

    public Session getSession() {
        final HibernateEntityManagerFactory emFactory = (HibernateEntityManagerFactory) entityManagerFactory;
        final SessionFactory sessionFactory = emFactory.getSessionFactory(); 
        return sessionFactory.getCurrentSession(); //ERROR No CurrentSessionContext configured!

          //This worked but I understand it to be BAD as spring should be managing open sessions.
          //        try {
          //            return sessionFactory.getCurrentSession();
          //        } catch (Exception e) {
          //            return sessionFactory.openSession();
          //        }
    }

    ...

}

知道为什么吗？

Answer 1

在属性文件中,

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

在配置类中

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

然后你可以自动装配

@Autowired
private SessionFactory sessionFactory;

我们这样做是因为Spring启动不会自动配置hibernate sessinoFactory.

更新:从Spring 4.3.12和Hibernate 5.2开始,上面的Hibernate API解决方案被折旧,转而使用通用JPA API解决方案EntityManagerFactory.

Session session = entityManager.unwrap(Session.class);

这是一些详细的示例文档,其中包含有关EntityManagerFactory的示例.

Answer 2

您可以使用 entityManagerFactory 解包方法而不是 HibernateJpaSessionFactoryBean 访问 SessionFactory

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

HibernateJpaSessionFactoryBean 在 Spring Boot 1.5.8 中被弃用