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Spring中事务代理方面的问题
     <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
          <property name="sessionFactory">
               <ref local="sessionFactory" />
          </property>
     </bean>
         
    <bean id="ordersDAOProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
         <property name="transactionManager">
              <ref bean="transactionManager" />
         </property>
         <property name="target">
              <ref local="ordersDAO" />
         </property>
         <property name="transactionAttributes">
              <props>
                   <prop key="insert*">PROPAGATION_REQUIRED</prop>
                   <prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
                   <prop key="is*">PROPAGATION_REQUIRED,readOnly</prop>
              </props>
         </property>
    </bean>
    
    <bean id="ordersDAO" class="com.gcoresoft.hibernate.OrdersDAO">
        <property name="sessionFactory">
            <ref local="sessionFactory" />
        </property>
    </bean>

    <bean name="/addOrder" class="com.gcoresoft.struts.action.OrderAction" singleton="false">
         <property name="ordersDAO">
              <ref local="ordersDAOProxy" />
         </property>
    </bean>
这个是传统的事务代理方式，下面的是目前开发中一种常用的事务代理方式(感谢Amigo姐姐)
 <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
      <property name="sessionFactory">
       <ref local="sessionFactory" />
      </property>
     </bean>

    <bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor">
        <!--  事务拦截器bean需要依赖注入一个事务管理器 -->
        <property name="transactionManager" ref="transactionManager" />
        <property name="transactionAttributes">
            <!--  下面定义事务传播属性-->
            <props>
                <prop key="insert*">PROPAGATION_REQUIRED</prop>
                   <prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
                   <prop key="is*">PROPAGATION_REQUIRED,readOnly</prop>
            </props>
        </property>
    </bean>

    <!-- 定义BeanNameAutoProxyCreator-->
    <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
        <!--  指定对满足哪些bean name的bean自动生成业务代理 -->
        <property name="beanNames">
            <!--  下面是所有需要自动创建事务代理的bean-->
            <list>
                <value>ordersDAO</value>
            </list>
            <!--  此处可增加其他需要自动创建事务代理的bean-->
        </property>
        <!--  下面定义BeanNameAutoProxyCreator所需的事务拦截器-->
        <property name="interceptorNames">
            <list>
                <!-- 此处可增加其他新的Interceptor -->
                <value>transactionInterceptor</value>
            </list>
        </property>
    </bean>

    <bean name="/addOrder" class="com.gcoresoft.struts.action.OrderAction" singleton="false">
     <property name="ordersDAO">
      <ref bean="ordersDAO" />
     </property>
    </bean>
不过，如果想使用代理，OrderDAO就必须是一个接口的实现，public class OrdersDAO extends HibernateDaoSupport implements IOrdersDAO ，然后在相应的OrderAction里面
    private IOrdersDAO ordersDAO;
    
    /**
     * @param ordersDAO
     */
    public void setOrdersDAO(IOrdersDAO ordersDAO)
    {
        this.ordersDAO=ordersDAO;
    }
这样才能使用事务代理，而不能直接将OrdersDAO作为传递参数的类型，因为那样程序会报错
Error creating bean with name '/addOrder' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Error setting property values; nested exception is PropertyAccessExceptionsException (1 errors)。

P.S:MyEclipse里面可以使用Hibernate Reverse Engineering来生成DAO，然后用Eclipse的Refactor来Extract Interface，这样就方便多了。呵呵！

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posted on 2007-05-10 22:27 TiGERTiAN 阅读(655) 评论(0)  编辑  收藏 所属分类: Java

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