spring+atomikos 实现的分布式事务

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spring +JTA + atomikos 实现分布式事务
***1 同一个web服务器,多个数据库,使用atomikos
2 跨越多个web服务器的事务,如果远程调用支持事务传播,使用JTA,如果不支持事务传播,尽量转化为一个web服务器的情况*
参考的网上一篇文章
配置了2个数据源,在一个service方法中同时向2个数据库中的表分别插入数据。
1、准备数据

create database user;CREATE TABLE `user` (  `id` int(11) DEFAULT NULL,  `name` varchar(100) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8;create database log;CREATE TABLE `log` (  `id` int(11) DEFAULT NULL,  `content` varchar(5) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8;

ApplicationContext.xml配置文件中的内容:

<?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: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.xsd                      http://www.springframework.org/schema/tx                      http://www.springframework.org/schema/tx/spring-tx.xsd                      http://www.springframework.org/schema/aop                      http://www.springframework.org/schema/aop/spring-aop.xsd">    <!-- 数据库1 -->    <bean id="db1" class="com.atomikos.jdbc.SimpleDataSourceBean" init-method="init" destroy-method="close">           <property name="uniqueResourceName">               <value>mysql/main</value>           </property>           <property name="xaDataSourceClassName">               <value>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</value>           </property>           <property name="xaDataSourceProperties">               <value>URL=jdbc:mysql://localhost:3306/user?useUnicode=true&amp;characterEncoding=utf-8;user=root;password=root</value>           </property>           <property name="exclusiveConnectionMode">               <value>true</value>           </property>           <property name="connectionPoolSize">               <value>3</value>           </property>           <property name="validatingQuery">               <value>SELECT 1</value>           </property>       </bean>           <!-- 数据库2 -->    <bean id="db2" class="com.atomikos.jdbc.SimpleDataSourceBean" init-method="init" destroy-method="close">           <property name="uniqueResourceName">               <value>mysql/secondary</value>           </property>           <property name="xaDataSourceClassName">                  <value>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</value>           </property>        <property name="xaDataSourceProperties">               <value>URL=jdbc:mysql://localhost:3306/log?useUnicode=true&amp;characterEncoding=utf-8;user=root;password=root</value>           </property>        <property name="exclusiveConnectionMode">               <value>true</value>           </property>        <property name="connectionPoolSize">               <value>3</value>           </property>        <property name="validatingQuery">            <value>SELECT 1</value>           </property>       </bean>         <bean id="userTransactionManager" init-method="init" destroy-method="close"        class="com.atomikos.icatch.jta.UserTransactionManager">           <property name="forceShutdown" value="true" />       </bean>    <bean id="userTransactionImp" class="com.atomikos.icatch.jta.UserTransactionImp">           <property name="transactionTimeout" value="300"/>        </bean>    <bean id="jtaTransactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">           <property name="transactionManager" ref="userTransactionManager" />        <property name="userTransaction" ref="userTransactionImp" />        <property name="allowCustomIsolationLevels" value="true"/>     </bean>    <!-- 配置事务传播特性 -->    <tx:advice id="txAdvice" transaction-manager="jtaTransactionManager">        <tx:attributes>           <tx:method name="save*" propagation="REQUIRED" rollback-for="Exception"/>           <tx:method name="add*" propagation="REQUIRED" rollback-for="Exception"/>           <tx:method name="create*" propagation="REQUIRED" rollback-for="Exception"/>           <tx:method name="insert*" propagation="REQUIRED" rollback-for="Exception"/>           <tx:method name="del*" propagation="REQUIRED" rollback-for="Exception"/>           <tx:method name="update*" propagation="REQUIRED" rollback-for="Exception"/>           <tx:method name="*" read-only="true"/>       </tx:attributes>    </tx:advice>    <!-- 事务管理 -->    <aop:config proxy-target-class="true">        <aop:advisor pointcut="execution(* com.zdp.service..*.*(..))" advice-ref="txAdvice"/>    </aop:config>    <bean id="userDao" class="com.zdp.dao.UserDao">        <property name="dataSource" ref="db1" />    </bean>    <bean id="logDao" class="com.zdp.dao.LogDao">        <property name="dataSource" ref="db2" />    </bean>    <bean id="userService" class="com.zdp.service.UserService">        <property name="userDao" ref="userDao" />        <property name="logDao" ref="logDao" />                </bean></beans>  

配置文件中的SimpleDataSourceBean类的介绍:
http://blog.csdn.net/guchuanlong/article/details/12600337

2 下载附件中的内容,下载地址:http://download.csdn.net/download/zdp072/7950391
导入eclipse中,运行UserTest类中的testSave()方法,成功后2个表中都插入了数据。
模拟异常情况,因为log表的content字段长度是5,如果插入的数据长度超过5,就会异常,模拟一下这种情况,当发生异常时,2个表中都不会插入数据,即事务要么全部成功,要么全部不成功,测试通过,你自己可以试试。(备注:这个例子是网上找的,感谢这个同学)

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