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iBATIS
最近弄一个框架，使用spring3.0.5+mybatis3.0.5，需要访问多库，要应用分布式事务JTA，这是用atomikos 3.70版本，并把配置做一下记录。


配置多个数据源
  <!-- 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.UserTransactionServiceFactory com.atomikos.icatch.console_file_name = tm.out com.atomikos.icatch.log_base_name = tmlog com.atomikos.icatch.tm_unique_name = com.atomikos.spring.jdbc.tm com.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){ }  参考文章 http://www.iteye.com/topic/122700