Spring TransactionRequiredException异常

Question

这是我的存储库配置:

@Configuration
public class RepositoryConfing {
    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(DataSource dataSource, JpaVendorAdapter jpaVendorAdapter){
        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setDataSource(dataSource);
        entityManagerFactoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        entityManagerFactoryBean.setPackagesToScan("com.imdb.model");
        return entityManagerFactoryBean;
    }

    @Bean
    public BasicDataSource dataSource(){
        BasicDataSource ds = new BasicDataSource();
        ds.setDriverClassName("org.postgresql.Driver");
        ds.setUrl("jdbc:postgresql://localhost:5432/imdb");
        ds.setUsername("***");
        ds.setPassword("***");
        ds.setInitialSize(5);
        return ds;
    }

    @Bean
    public JpaVendorAdapter jpaVendorAdapter(){
        HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
        adapter.setDatabase(Database.POSTGRESQL);
        adapter.setShowSql(true);
        adapter.setGenerateDdl(false);
        adapter.setDatabasePlatform("org.hibernate.dialect.PostgreSQLDialect");
        return adapter;
    }
}

当我调用merge方法时,我得到一个例外:javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'merge' call

可能是我RepositoryConfig缺少一些额外的配置？

编辑:我的新存储库配置:

@Configuration
@EnableTransactionManagement
public class RepositoryConfing {
    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(DataSource dataSource, JpaVendorAdapter jpaVendorAdapter){
        LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
        entityManagerFactoryBean.setDataSource(dataSource);
        entityManagerFactoryBean.setJpaVendorAdapter(jpaVendorAdapter);
        entityManagerFactoryBean.setPackagesToScan("com.imdb.model");
        return entityManagerFactoryBean;
    }

    @Bean
    public BasicDataSource dataSource(){
        BasicDataSource ds = new BasicDataSource();
        ds.setDriverClassName("org.postgresql.Driver");
        ds.setUrl("jdbc:postgresql://localhost:5432/imdb");
        ds.setUsername("***");
        ds.setPassword("***");
        ds.setInitialSize(5);
        return ds;
    }

    @Bean
    public JpaVendorAdapter jpaVendorAdapter(){
        HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
        adapter.setDatabase(Database.POSTGRESQL);
        adapter.setShowSql(true);
        adapter.setGenerateDdl(false);
        adapter.setDatabasePlatform("org.hibernate.dialect.PostgreSQLDialect");
        return adapter;
    }

    @Bean
    public PlatformTransactionManager txManager() {
        return new DataSourceTransactionManager(dataSource());
    }
}

现在它失败了StackOverflow.可能DataSourceTransactionManager不适合JPA？

Answer 1

@Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
    return new JpaTransactionManager(entityManagerFactory);
}

• 您的txManager方法应重命名为transactionManager.
• 你需要一个JpaTransactionManager而不是一个DataSourceTransactionManager

编辑

为了与JPA进行全功能交易,您需要:

• 使用@EnableTransactionManagement您的配置文件
• 宣布一个 EntityManagerFactoryBean
• 声明使用先前声明创建的JpaTransactionManager(必须命名的bean transactionManager)EntityManagerFactoryBean
• 注射(有@PersistenceContext或@Autowired)一个EntityManager在你的@Repository(必须是一个Spring bean)
• 从a调用您的存储库@Service并使用anotated 的公共方法@Transactional

当然这是简化的,我假设您使用的是java配置,注释和自动组件扫描.