Question

是否可以创建利用通过@Transactional创建的现有事务的本机查询？这里的大多数问题似乎都是关于进行本机查询。此外，来自Spring + Hibernate Transaction -- Native SQL rollback failure的答案也表示可能无法做到。

我测试隔离的方法是运行一些删除并添加一个断点来调查数据库。

这是我到目前为止所尝试的内容：

@Transactional(value = "someManager")
public class SpringJpaSomeDao implements SomeDao {

@PersistenceContext(unitName = "someUnit")
@Qualifier("entityManagerFactorySome")
private EntityManager em;


@Resource
@Qualifier("someManager")
private PlatformTransactionManager transactionManager;

@Override
@Transactional(value = "someManager", propagation = Propagation.SUPPORTS)
public void runNative(String sql){
    TransactionTemplate transactionTemplate = new TransactionTemplate(transactionManager);
    transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_SUPPORTS);
    transactionTemplate.execute(new TransactionCallbackWithoutResult() {

        @Override

        protected void doInTransactionWithoutResult(TransactionStatus status) {

            em.createNativeQuery(sql).executeUpdate();

        }

    });





}

persistence.xml的某些部分

<persistence-unit name="someUnit" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <non-jta-data-source>java:comp/env/jdbc/someDS</non-jta-data-source>
    <!-- some classes here -->
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
        <!-- some dialect -->
    </properties>
</persistence-unit>

从某个控制器调用代码，该控制器还具有@Transactional注释，用于删除Dao。

@Transactional(value = "someManager", propagation = Propagation.SUPPORTS)
public void deleteEntireDatabase() {

    List<String> deletions = new ArrayList<>();
    deletions.add("DELETE FROM something;");


    for (String currentDeletion : deletions) {
        someDao.runNative(currentDeletion);
    }


}

@Override
@Transactional(value = "someManager", propagation = Propagation.REQUIRES_NEW, rollbackFor = {Exception.class})
public void deleteAndFill(JobExecutionProgress progress) {
    deleteEntireDatabase();
    // more code
}

摘自spring-dao.xml：

<tx:annotation-driven  />

<bean id="entityManagerFactorySome" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="dataSource" ref="someDataSource" />
    <property name="persistenceUnitName" value="someUnit" />
    <property name="jpaProperties">
        <props>
            <!-- some dialect -->
        </props>
    </property>
</bean>

<bean id="someDao" class="xyz.model.controller.SpringJpaSomeDao"/>

<bean id="someManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactorySome" />
    <qualifier value="someManager"></qualifier>
</bean>


<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

当然，我还尝试了一些变体，例如不同的传播，并使用从其他地方获得的entityManager：

    EntityManagerFactory emf = ((JpaTransactionManager) transactionManager).getEntityManagerFactory();

    EntityManager em2 = EntityManagerFactoryUtils.getTransactionalEntityManager(emf);

现在，如果其他一切都失败了，我会做的是手动交易管理。

这是适用于您的某个应用程序的内容还是未知是否可能是设置问题？

Answer 1

实际上，事实证明，评论中提到的alter table语句似乎是问题所在。不确定重置auto_increment如何清空表，但似乎就是这种情况。

春天＆amp; Hibernate - 使本机查询在与@Transactional

1 个答案: