春季交易不起作用？

Question

您好，我正在尝试使用事务开发 spring 和 hibernate 应用程序，我正在使用 spring 4.x 和 hibernate 4.x，这是我的代码 sn-p

applicationContext.xml

<tx:annotation-driven />
     <context:annotation-config />

     <context:component-scan base-package="com.xyx.service" />
     <context:component-scan base-package="com.xyz.dao" />


    <import resource="conf/spring/persistence.xml" />

servlet-context.xml

<context:component-scan base-package="com.xyx.webservice.components" />
     <mvc:annotation-driven />
 <bean id="jsonMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
    </bean>  

    <!--      Configure to plugin JSON as request and response in method handler -->
  <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="jsonMessageConverter"/>
            </list>
        </property>
    </bean> 

persistance.xml

<bean id="dataSource"
            class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver" />
            <property name="url" value="jdbc:mysql://localhost:3306/xyx" />
            <property name="username" value="root" />
            <property name="password" value="root" />
      </bean>

    <bean id="sessionFactory"           class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource">
            <ref bean="dataSource"/>
        </property>
        <property name="packagesToScan" value="com.xyz.model" />       
        <property name="hibernateProperties">
            <props>

                  <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                  <prop key="hibernate.show_sql">true</prop>           
                  <prop key="hibernate.cache.use_second_level_cache">false</prop>    
            </props>
        </property>

    </bean>

    <bean id = "transactionManager" class = "org.springframework.orm.hibernate4.HibernateTransactionManager"   p:sessionFactory-ref= "sessionFactory" > 
   </bean>



    </beans>

最后我的服务看起来像这样

@Transactional(propagation=Propagation.REQUIRED,rollbackFor=RuntimeException.class)
    public Object loadCategories(UserContactsInputVO inputVo) {

        User user= getUserObject(inputVo);


        userDAO.saveOrUpdateForTrancasction(user);
        System.out.println(user.getUserId());

        //getAudioFilesBasedOnCategories();
        try{
            return getAudioFilesBasedOnCategories();
        }catch (RuntimeException e) {
            e.printStackTrace();
        }
        return new CategoryResponseVo();
    }

和

@Transactional(propagation=Propagation.REQUIRED)
    public CategoryResponseVo  getAudioFilesBasedOnCategories()
    {

        try{
            if(true)
        throw new RuntimeException();

        }finally{

        }
        return vo;

    }

此处发生运行时异常，但数据库记录未回滚。

Answer 1

事务没有回滚的原因是因为 RuntimeException 没有传播到管理事务回滚代码的实际 Spring 代理。而它没有被传播的原因是你已经抓住了它并且没有重新抛出。

try{
            return getAudioFilesBasedOnCategories();
        }catch (RuntimeException e) {
            e.printStackTrace(); //**THIS IS WRONG**
        }

改为这样做

 try{
                return getAudioFilesBasedOnCategories();
            }catch (RuntimeException e) {
                //log the error
                  throw e; // throw back
            }

此外，您可能不需要在 RuntimeException 上提供 rollbackFor 属性，因为默认情况下，事务会回滚。