[20160419] Spring Transaction 配置
[20160419] Spring Transaction 配置
Pandaroid 发表于2年前
[20160419] Spring Transaction 配置
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Spring Transaction 配置

整理自 roroyangivan的专栏《Spring Transaction》

以我更易于理解的方式整理 roroyangivan 的专栏文章,帮助自己学习,同时希望也能帮到更多人,谢谢。

1. 综述

Spring 配置文件中,事务配置,三个组成部分:

  1. 数据源:DataSource
  2. 事务管理器:TransactionManager
  3. 代理机制:Proxy

配置方式变化,一般只是代理机制变化;数据访问方式变化,DataSource、TransactionManager 相应变化。参见下图:

配置方式、代理机制变化;数据访问方式,DataSource、TransactionManager 变化

根据代理机制不同,五种 Spring Transaction 的配置方式:

  1. 每个 Bean 都有一个代理
  2. 所有 Bean 共享一个代理基类
  3. 使用拦截器
  4. 使用 tx 标签配置的拦截器
  5. 全注解

个人比较喜欢 第 4 种第 5 种

2. 分类阐述

2.1 每个 Bean 都有一个代理

<?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">

	<!-- 数据源:DataSource -->
    <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>  

    <!-- 定义事务管理器(声明式的事务):TransactionManager -->  
    <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>
    
    <!-- 代理机制:Proxy。每个 Bean 都有一个代理:userDaoTarget 的代理 -->
    <bean id="userDao" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">  
        <!-- 配置事务管理器 -->  
        <property name="transactionManager" ref="transactionManager" />     
        <property name="target" ref="userDaoTarget" />  
        <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" />
        <!-- 配置事务属性 -->  
        <property name="transactionAttributes">  
            <props>  
                <prop key="*">PROPAGATION_REQUIRED</prop>
            </props>  
        </property>  
    </bean>  
</beans>

2.2 所有 Bean 共享一个代理基类

<?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>  

    <!-- 定义事务管理器(声明式的事务) -->  
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    
    <!-- 所有 Bean 共享的代理基类 -->
    <bean id="transactionBase"  
            class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"  
            lazy-init="true" abstract="true">  
        <!-- 配置事务管理器 -->  
        <property name="transactionManager" ref="transactionManager" />  
        <!-- 配置事务属性 -->  
        <property name="transactionAttributes">  
            <props>  
                <prop key="*">PROPAGATION_REQUIRED</prop>  
            </props>  
        </property>  
    </bean>    
   
    <!-- Start: 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>
    
    <bean id="msgDaoTarget" class="com.bluesky.spring.dao.MsgDaoImpl">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <bean id="msgDao" parent="transactionBase" >  
        <property name="target" ref="msgDaoTarget" />   
    </bean>
    <!-- End  : 配置DAO -->
</beans>

2.3 使用拦截器

<?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>  

    <!-- 定义事务管理器(声明式的事务) -->  
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean> 
   
    <!-- 事务拦截器 -->
    <bean id="transactionInterceptor"  
        class="org.springframework.transaction.interceptor.TransactionInterceptor">  
        <property name="transactionManager" ref="transactionManager" />  
        <!-- 配置事务属性 -->  
        <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>

2.4 使用 tx 标签配置的拦截器

<?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>  

    <!-- 定义事务管理器(声明式的事务) -->  
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <!-- 使用 tx 标签配置的拦截器 -->
    <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>

2.5 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>  

    <!-- 定义事务管理器(声明式的事务) -->  
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    
</beans>

此时在 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();
    }
    
}
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