为什么在使用AspectJ模式事务时没有事务？

Question

我有这样的服务层：

@Service
@Transactional
public class TransactionService {

    @Autowired
    private TransactionDao dao;


    @Transactional(propagation = Propagation.REQUIRED)
    public void A() {
        ...
        B();
    }
    @Transactional(propagation = Propagation.REQUIRED_NEW)
    public void B() {
        dao.save()
    }

}

使用此配置：

<property name="jpaVendorAdapter">
    <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<tx:annotation-driven transaction-manager="transactionManager" />
<property name="jpaProperties">
    <props>
        <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
        <prop key="hibernate.show_sql">${show.sql}</prop>
        <prop key="hibernate.hbm2ddl.auto">${hbm2ddl.auto}</prop>
    </props>
</property>

一切正常！ 由于我具有基于代理的事务，因此不会在方法B（）中创建新事务！ 但是，一笔交易创建得很好！ 一切都是合乎逻辑的！

但是呢？

<tx:annotation-driven transaction-manager="transactionManager" mode="aspectj" />

这应该可以解决我的问题，必须创建新交易！ 但我有这样的错误：

SEVERE: Servlet.service() for servlet [ name ] in context with path [/name-services] threw exception [Request processing failed; nested exception is javax.persistence.TransactionRequiredException: No transactional EntityManager available] with root cause
javax.persistence.TransactionRequiredException: No transactional EntityManager available
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:273)