分布式事务在企业应用中一般使用EJB或是通过Spring使用J2EE Application Server中的事务管理器。
如果你想在J2SE应用使用分布式事务,一般会选择atomikos或jotm.
以下是在spring中配置jotm的例子,数据源使用xapool.
spring(2.5.6): http://static.springsource.org/spring/docs/2.0.x/reference/transaction.html
jotm(2.2.1): http://forge.ow2.org/projects/jotm/
xapool(1.5.0): http://forge.ow2.org/projects/xapool
在Spring中配置要注意以下几个问题。
1。默认只对RuntimeException和Error进行回滚。
在事务属性中配置需要额外回滚的自定义checked exception,在以下配置中搜索 rollback-for.
2。 应该是在business方法上或是更高层次加上事务AOP,而不是在DAO这层。
<?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:security="http://www.ubs.com/schema/security" 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/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 http://www.ubs.com/schema/security http://www.ubs.com/schema/security.xsd"> <bean id="jotm" class="org.springframework.transaction.jta.JotmFactoryBean" destroy-method="shutdown" /> <bean id="dsMaster" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource"> <property name="dataSource"> <bean class="org.enhydra.jdbc.standard.StandardXADataSource"> <property name="transactionManager"> <ref local="jotm" /> </property> <property name="driverName"> <value>com.mysql.jdbc.Driver</value> </property> <property name="url"> <value>jdbc:mysql://localhost:3306/test1</value> </property> </bean> </property> <property name="user"> <value>root</value> </property> <property name="password"> <value>Linux</value> </property> </bean> <bean id="dsSlave" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource"> <property name="dataSource"> <bean class="org.enhydra.jdbc.standard.StandardXADataSource"> <property name="transactionManager"> <ref local="jotm" /> </property> <property name="driverName"> <value>com.mysql.jdbc.Driver</value> </property> <property name="url"> <value>jdbc:mysql://localhost:3307/test2</value> </property> </bean> </property> <property name="user"> <value>root</value> </property> <property name="password"> <value>Linux</value> </property> </bean> <bean id="txManager" class="org.springframework.transaction.jta.JtaTransactionManager"> <property name="userTransaction"> <ref local="jotm" /> </property> </bean> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="get*" read-only="true" /> <tx:method name="*" rollback-for="SQLException,CustomException"/> </tx:attributes> </tx:advice> <aop:config> <aop:pointcut id="bizOperation" expression="execution(* test.mysql.xa.Business.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="bizOperation" /> </aop:config> <bean id="business" class="test.mysql.xa.Business"> <property name="masterDAO" ref="masterDAO"/> <property name="slaveDAO" ref="slaveDAO"/> </bean> <bean id="masterDAO" class="test.mysql.xa.dao.MasterDAO"> <property name="datasource" ref="dsMaster"/> </bean> <bean id="slaveDAO" class="test.mysql.xa.dao.SlaveDAO"> <property name="datasource" ref="dsSlave"/> </bean> </beans>