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    Terry.Li-彬

    虛其心,可解天下之問;專其心,可治天下之學;靜其心,可悟天下之理;恒其心,可成天下之業。

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    前段時間對Spring的事務配置做了比較深入的研究,在此之間對Spring的事務配置雖說也配置過,但是一直沒有一個清楚的認識。通過這次的學習發覺Spring的事務配置只要把思路理清,還是比較好掌握的。

        總結如下:

        Spring配置文件中關于事務配置總是由三個組成部分,分別是DataSource、TransactionManager和代理機制這三部分,無論哪種配置方式,一般變化的只是代理機制這部分。

        DataSource、TransactionManager這兩部分只是會根據數據訪問方式有所變化,比如使用Hibernate進行數據訪問 時,DataSource實際為SessionFactory,TransactionManager的實現為 HibernateTransactionManager。

        具體如下圖:

    Spring事務配置 (2)

        根據代理機制的不同,總結了五種Spring事務的配置方式,配置文件如下:

        第一種方式:每個Bean都有一個代理

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi
    ="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context
    ="http://www.springframework.org/schema/context"
        xmlns:aop
    ="http://www.springframework.org/schema/aop"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
               http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
               http://www.springframework.org/schema/context
               http://www.springframework.org/schema/context/spring-context-2.5.xsd
               http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
    >

       
    <bean id="sessionFactory" 
                class
    ="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
           
    <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
           
    <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
       
    </bean> 

       
    <!-- 定義事務管理器(聲明式的事務) --> 
       
    <bean id="transactionManager"
            class
    ="org.springframework.orm.hibernate3.HibernateTransactionManager">
           
    <property name="sessionFactory" ref="sessionFactory" />
       
    </bean>
       
       
    <!-- 配置DAO -->
       
    <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl">
           
    <property name="sessionFactory" ref="sessionFactory" />
       
    </bean>
       
       
    <bean id="userDao" 
            class
    ="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> 
              
    <!-- 配置事務管理器 --> 
              
    <property name="transactionManager" ref="transactionManager" />    
           
    <property name="target" ref="userDaoTarget" /> 
            
    <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" />
           
    <!-- 配置事務屬性 --> 
           
    <property name="transactionAttributes"> 
               
    <props> 
                   
    <prop key="*">PROPAGATION_REQUIRED</prop>
               
    </props> 
           
    </property> 
       
    </bean> 
    </beans>

        第二種方式:所有Bean共享一個代理基類

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi
    ="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context
    ="http://www.springframework.org/schema/context"
        xmlns:aop
    ="http://www.springframework.org/schema/aop"
        xsi:schemaLocation
    ="http://www.springframework.org/schema/beans
               http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
               http://www.springframework.org/schema/context
               http://www.springframework.org/schema/context/spring-context-2.5.xsd
               http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
    >

       
    <bean id="sessionFactory" 
                class
    ="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
           
    <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
           
    <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
       
    </bean> 

       
    <!-- 定義事務管理器(聲明式的事務) --> 
       
    <bean id="transactionManager"
            class
    ="org.springframework.orm.hibernate3.HibernateTransactionManager">
           
    <property name="sessionFactory" ref="sessionFactory" />
       
    </bean>
       
       
    <bean id="transactionBase" 
                class
    ="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" 
                lazy-init
    ="true" abstract="true"> 
           
    <!-- 配置事務管理器 --> 
           
    <property name="transactionManager" ref="transactionManager" /> 
           
    <!-- 配置事務屬性 --> 
           
    <property name="transactionAttributes"> 
               
    <props> 
                   
    <prop key="*">PROPAGATION_REQUIRED</prop> 
               
    </props> 
           
    </property> 
       
    </bean>   
      
       
    <!-- 配置DAO -->
       
    <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl">
           
    <property name="sessionFactory" ref="sessionFactory" />
       
    </bean>
       
       
    <bean id="userDao" parent="transactionBase" > 
           
    <property name="target" ref="userDaoTarget" />  
       
    </bean>
    </beans>

    第三種方式:使用攔截器

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi
    ="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context
    ="http://www.springframework.org/schema/context"
        xmlns:aop
    ="http://www.springframework.org/schema/aop"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
               http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
               http://www.springframework.org/schema/context
               http://www.springframework.org/schema/context/spring-context-2.5.xsd
               http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
    >

       
    <bean id="sessionFactory" 
                class
    ="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
           
    <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
           
    <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
       
    </bean> 

       
    <!-- 定義事務管理器(聲明式的事務) --> 
       
    <bean id="transactionManager"
            class
    ="org.springframework.orm.hibernate3.HibernateTransactionManager">
           
    <property name="sessionFactory" ref="sessionFactory" />
       
    </bean> 
      
       
    <bean id="transactionInterceptor" 
            class
    ="org.springframework.transaction.interceptor.TransactionInterceptor"> 
           
    <property name="transactionManager" ref="transactionManager" /> 
           
    <!-- 配置事務屬性 --> 
           
    <property name="transactionAttributes"> 
               
    <props> 
                   
    <prop key="*">PROPAGATION_REQUIRED</prop> 
               
    </props> 
           
    </property> 
       
    </bean>
         
       
    <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"> 
           
    <property name="beanNames"> 
               
    <list> 
                   
    <value>*Dao</value>
                </list> 
           
    </property> 
           
    <property name="interceptorNames"> 
               
    <list> 
                   
    <value>transactionInterceptor</value> 
               
    </list> 
           
    </property> 
       
    </bean> 
     
       
    <!-- 配置DAO -->
       
    <bean id="userDao" class="com.bluesky.spring.dao.UserDaoImpl">
           
    <property name="sessionFactory" ref="sessionFactory" />
       
    </bean>
    </beans>

    第四種方式:使用tx標簽配置的攔截器

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi
    ="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context
    ="http://www.springframework.org/schema/context"
        xmlns:aop
    ="http://www.springframework.org/schema/aop"
        xmlns:tx
    ="http://www.springframework.org/schema/tx"
        xsi:schemaLocation
    ="http://www.springframework.org/schema/beans
               http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
               http://www.springframework.org/schema/context
               http://www.springframework.org/schema/context/spring-context-2.5.xsd
               http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
               http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"
    >

       
    <context:annotation-config />
       
    <context:component-scan base-package="com.bluesky" />

       
    <bean id="sessionFactory" 
                class
    ="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
           
    <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
           
    <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
       
    </bean> 

       
    <!-- 定義事務管理器(聲明式的事務) --> 
       
    <bean id="transactionManager"
            class
    ="org.springframework.orm.hibernate3.HibernateTransactionManager">
           
    <property name="sessionFactory" ref="sessionFactory" />
       
    </bean>

       
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
           
    <tx:attributes>
               
    <tx:method name="*" propagation="REQUIRED" />
           
    </tx:attributes>
       
    </tx:advice>
       
       
    <aop:config>
           
    <aop:pointcut id="interceptorPointCuts"
                expression
    ="execution(* com.bluesky.spring.dao.*.*(..))" />
           
    <aop:advisor advice-ref="txAdvice"
                pointcut-ref
    ="interceptorPointCuts" />       
       
    </aop:config>     
    </beans>

    第五種方式:全注解

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi
    ="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context
    ="http://www.springframework.org/schema/context"
        xmlns:aop
    ="http://www.springframework.org/schema/aop"
        xmlns:tx
    ="http://www.springframework.org/schema/tx"
        xsi:schemaLocation
    ="http://www.springframework.org/schema/beans
               http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
               http://www.springframework.org/schema/context
               http://www.springframework.org/schema/context/spring-context-2.5.xsd
               http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
               http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"
    >

       
    <context:annotation-config />
       
    <context:component-scan base-package="com.bluesky" />

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

       
    <bean id="sessionFactory" 
                class
    ="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
           
    <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
           
    <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
       
    </bean> 

       
    <!-- 定義事務管理器(聲明式的事務) --> 
       
    <bean id="transactionManager"
            class
    ="org.springframework.orm.hibernate3.HibernateTransactionManager">
           
    <property name="sessionFactory" ref="sessionFactory" />
       
    </bean>
       
    </beans>

    此時在DAO上需加上@Transactional注解,如下:

    package com.bluesky.spring.dao;

    import java.util.List;

    import org.hibernate.SessionFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
    import org.springframework.stereotype.Component;

    import com.bluesky.spring.domain.User;

    @Transactional
    @Component(
    "userDao")
    public class UserDaoImpl extends HibernateDaoSupport implements UserDao {

       
    public List<User> listUsers() {
           
    return this.getSession().createQuery("from User").list();
        }
       
       
    }
    posted on 2009-04-07 09:29 禮物 閱讀(2053) 評論(0)  編輯  收藏 所屬分類: spring
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