spring+mybatis+atomikos 实现JTA事务

看到了一篇介绍mybatis实现JTA事务的文章，觉得很有必要缓存一下，留作参考，辛苦原作者，转载地址如下：

http://my.oschina.net/baowenke/blog/99814

atomikos支持一个分布式事务，结合spring，可以很好的满足一个应用访问多个库的需要。

atomikos 结合spring做配置也很简单

1.配置datasource

<!-- 第一个数据库 -->    <bean id="dataSource" class="com.atomikos.jdbc.SimpleDataSourceBean"        init-method="init" destroy-method="close">        <property name="uniqueResourceName" value="mysql/main" />        <property name="xaDataSourceClassName"            value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource" />        <property name="xaDataSourceProperties"            value="URL=${jdbc.url.a};user=${jdbc.username.a};password=${jdbc.password.a}" />        <property name="exclusiveConnectionMode" value="true" />        <property name="connectionPoolSize" value="10" />        <property name="validatingQuery">            <value>SELECT 1</value>        </property>    </bean>    <!-- 第二个数据库 -->    <bean id="dataSourceB" class="com.atomikos.jdbc.SimpleDataSourceBean"        init-method="init" destroy-method="close">        <property name="uniqueResourceName" value="mysql/news" />        <property name="xaDataSourceClassName"            value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource" />        <property name="xaDataSourceProperties"            value="URL=${jdbc.url.b};user=${jdbc.username.b};password=${jdbc.password.b}" />        <property name="exclusiveConnectionMode" value="true" />        <property name="connectionPoolSize" value="10" />        <property name="validatingQuery">            <value>SELECT 1</value>        </property>    </bean>

配置mybatis的SessionFactory

<bean id="sqlSessionFactoryB" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="configLocation" value="classpath:mybatis/mybatis-config-b.xml" />        <property name="dataSource" ref="dataSourceB" />    </bean>     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="configLocation" value="classpath:mybatis/mybatis-config.xml" />        <property name="dataSource" ref="dataSource" />    </bean>

这里使用的是SessionFactory，不是org.springframework.orm.ibatis.SqlMapClientFactoryBean，在mybatis3中用SqlMapClientFactoryBean汇报com.ibatis.common.xml.NodeletException 异常。

configLocation 对应的mybatis配置，跟平时配置一样。

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration>    <typeAliases>        <typeAlias alias="User"  type="com.lantii.domain.User"/>    </typeAliases>    <mappers>        <mapper resource="com/lantii/dao/UserMapper.xml" />    </mappers></configuration>

事务这块用spring管理atomikos

<bean id="atomikosTransactionManager" class="com.atomikos.icatch.jta.UserTransactionManager"        init-method="init" destroy-method="close">        <property name="forceShutdown">            <value>true</value>        </property>    </bean>     <bean id="atomikosUserTransaction" class="com.atomikos.icatch.jta.UserTransactionImp">        <property name="transactionTimeout" value="300" />    </bean>     <bean id="springTransactionManager"        class="org.springframework.transaction.jta.JtaTransactionManager">        <property name="transactionManager">            <ref bean="atomikosTransactionManager" />        </property>        <property name="userTransaction">            <ref bean="atomikosUserTransaction" />        </property>    </bean>     <aop:aspectj-autoproxy />     <aop:config  proxy-target-class="true">        <aop:advisor pointcut="execution(* *com.lantii.service..*(..))"            advice-ref="txAdvice" />    </aop:config>     <tx:advice id="txAdvice" transaction-manager="springTransactionManager">        <tx:attributes>            <tx:method name="get*"  propagation="REQUIRED"  read-only="true" />            <tx:method name="find*"  propagation="REQUIRED"  read-only="true" />            <tx:method name="has*"  propagation="REQUIRED"  read-only="true" />            <tx:method name="locate*"  propagation="REQUIRED"  read-only="true" />            <tx:method name="*"  propagation="REQUIRED" rollback-for="Exception"  />        </tx:attributes>    </tx:advice>

Mapper的管理及注入

<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">        <property name="sqlSessionFactory" ref="sqlSessionFactory" />        <property name="mapperInterface" value="com.lantii.dao.UserMapper" />    </bean>         <bean id="roleMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">        <property name="sqlSessionFactory" ref="sqlSessionFactoryB" />        <property name="mapperInterface" value="com.lantii.dao.RoleMapper" />    </bean>     <bean id="userService" class="com.lantii.service.UserServiceImpl">        <property name="userMapper" ref="userMapper" />        <property name="roleMapper" ref="roleMapper" />    </bean>

atomikos的配置jta.properties，该文件放在应用classpath下面

com.atomikos.icatch.service=com.atomikos.icatch.standalone.UserTransactionServiceFactorycom.atomikos.icatch.console_file_name = tm.outcom.atomikos.icatch.log_base_name = tmlogcom.atomikos.icatch.tm_unique_name = com.atomikos.spring.jdbc.tmcom.atomikos.icatch.console_log_level=WARN

这几基本配置完毕，需要jar包

atomikos-util.jar

transactions.jar

transactions-jta.jar

transactions-jdbc-deprecated.jar

mybatis.jar

mybatis-spring.jar

cglib.2.2.2.jar

spring的jar包

在Service中，调用事务的方法不能try。。。catch事务的方法，否者不能回滚

如下带面就会出现不会滚问题

try{    userMapper.addUser(user);    roleMapper.addRole(role);}catch(Exception){        }

当然也可以不用mybatis，个人喜欢用Spring JdbcTemplate