java - Hibernate 在选择之前不会刷新持久化上下文

Question

我正在尝试使用 spring 事务支持来使用 hibernate。我已将 session 工厂配置为 bean(见下文)并创建了一个 DAO 类。我还使用 spring 测试支持 - 使用 @Transactional 注释运行测试类， (据我所知)应该允许我在单个事务中调用多个 dao 操作。我读到 hibernate 应该在提交之后或执行选择之前刷新其持久性上下文。我对后者抱有希望。但我的大部分测试失败，因为(根据日志)hibernate 在插入之后和选择之前没有刷新它的持久性上下文。

这是 Spring 配置的 Spring 部分:

@Configuration
@PropertySource("/db.properties")
@EnableTransactionManagement
@ComponentScan(basePackages = "repository")
public class DataAccessConfiguration {

 @Bean
    public SessionFactory sessionFactory() throws IOException {
        LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
        sessionFactoryBean.setDataSource(pool());
        sessionFactoryBean.setPackagesToScan("domain");
        sessionFactoryBean.setHibernateProperties(hibernateProperties());
        sessionFactoryBean.afterPropertiesSet();
        return sessionFactoryBean.getObject();
    }

    private Properties hibernateProperties() {
        Properties hibernateProp = new Properties();
        hibernateProp.put("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
        hibernateProp.put("hibernate.format_sql", true);
        hibernateProp.put("hibernate.use_sql_comments", true);
        hibernateProp.put("hibernate.show_sql", true);
        hibernateProp.put("hibernate.max_fetch_depth", 3);
        hibernateProp.put("hibernate.jdbc.batch_size", 10);
        hibernateProp.put("hibernate.jdbc.fetch_size", 50);
        hibernateProp.put("hibernate.hbm2ddl.auto", "update");
        return hibernateProp;
    }

    @Bean
    @Profile("hibernate")
    public PlatformTransactionManager transactionManager() throws IOException {
        HibernateTransactionManager manager = new HibernateTransactionManager(sessionFactory());
        manager.setDataSource(pool());

        return manager;
    }

    @Bean
    @Profile("jdbc")
    PlatformTransactionManager jdbcTransactionManager(){
        DataSourceTransactionManager manager = new DataSourceTransactionManager();
        manager.setDataSource(pool());

        return manager;
    }
}

我正在使用两个平台事务管理器——一个用于 jdbc，另一个用于 hibernate。我尝试删除 jdbc 管理器，只留下 hibernate(不起作用)。

这是 dao 类:

@Repository
@Profile("hibernate")
public class UserDaoHibernate implements UserDao {

    private final SessionFactory sessionFactory;

    public UserDaoHibernate(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    @Override
    public void insert(User user) {
        sessionFactory.getCurrentSession().save(user);
    }

    @Override
    public void addRole(User user, Role role) {
        NativeQuery addRoleQuery = sessionFactory.getCurrentSession()
                .createNativeQuery("INSERT INTO roles(user_name, user_role) VALUES(:user_name,:user_role)");
        addRoleQuery.setParameter("user_name",user.getUsername());
        addRoleQuery.setParameter("user_role", role.toString().toUpperCase());
        addRoleQuery.executeUpdate();
    }

    @Override
    public boolean hasRole(User user, Role role) {
        NativeQuery hasRoleQuery = sessionFactory.getCurrentSession()
                .createSQLQuery("SELECT * FROM roles WHERE user_name = :user_name AND user_role = :user_role");
        hasRoleQuery.setParameter("user_name", user.getUsername());
        hasRoleQuery.setParameter("user_role", role.toString().toUpperCase());
        return hasRoleQuery.getResultList().size() == 1;
    }

}

测试类失败的测试代码在这里:

@ContextConfiguration(classes = {DataAccessConfiguration.class})
@Rollback
@ExtendWith(SpringExtension.class)
@ActiveProfiles("hibernate")
@Transactional
public class UserDaoTest {

    @Autowired
    private UserDao sut;

    private User user = new User("NEW_USERNAME123", "NEW_PASSWORD123", LocalDate.now().minusYears(20),
            "FIRST_NAME", "LAST_NAME");

    @Test
    public void shouldAddNewRoleToUser(){
        sut.insert(user);
        assertFalse(sut.hasRole(user,Role.MEMBER));

        sut.addRole(user, Role.MEMBER);

        assertTrue(sut.hasRole(user,Role.MEMBER));
    }

}

这是我运行测试方法后得到的输出(不包括交易注释):

Hibernate: 
    select
        nextval ('USER_ID_SEQUENCE')
Hibernate: 
    /* dynamic native SQL query */ SELECT
        * 
    FROM
        roles 
    WHERE
        user_name = ? 
        AND user_role = ?
Hibernate: 
    /* dynamic native SQL query */ INSERT 
    INTO
        roles
        (user_name, user_role) 
    VALUES
        (?,?)
Nov 13, 2019 3:05:31 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 0, SQLState: 23503
Nov 13, 2019 3:05:31 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: ERROR: insert or update on table "roles" violates foreign key constraint "fk_roles_user_id"
  Detail: Key (user_name)=(NEW_USERNAME123) is not present in table "users_table".

当我以编程方式提交 session 时 sessionFactory.getCurrentSession().getTransaction().commit();在插入结束时一切正常。

Answer 1

尝试将插入方法设置为@Transactional或使用sessionFactory.getCurrentSession().flush()