关于用spring的JtaTransactionManager，配置分布式事务

摘自（http://www.blogjava.net/landor2004/archive/2010/01/09/308827.html）

如果容器支持jta，那么spring配置起来非常简单，因为spring提供了JtaTransactionManager，在这里面提供了几乎所有的服务器的jta的jndi名字，比如

* "java:comp/UserTransaction" for Resin 2.x, Oracle OC4J (Orion), JOnAS (JOTM), BEA WebLogic
* "java:comp/TransactionManager" for Resin 3.x
* "java:appserver/TransactionManager" for GlassFish
* "java:pm/TransactionManager" for Borland Enterprise Server and Sun Application Server (Sun ONE 7 and later)
* "java:/TransactionManager" for JBoss Application Server

由于大部分服务器获取jta的方式都不尽相同，spring还针对不同的服务器提供了不同的jta实现，例如：
WebLogicJtaTransactionManager
WebSphereUowTransactionManager
OC4JJtaTransactionManager
具体内容参加：
http://static.springsource.org/spring/docs/2.5.x/api/org/springframework/transaction/jta/JtaTransactionManager.html

不管是jdbc、hibernate还是ibatis，都可以通过JtaTransactionManager来配置分布式事务
下面简单贴出部分配置代码：
hibernate：
<beans>
<jee:jndi-lookup id="myDataSource1" jndi-name="dsjndi1" />
<jee:jndi-lookup id="myDataSource2" jndi-name="dsjndi2" />

<bean id="mySessionFactory1"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource">
<ref bean="myDataSource1" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hiberante.format_sql">true</prop>
</props>
</property>
<property name="annotatedClasses">
<list>
<value>com.landor.test.entity.User</value>
</list>
</property>
<property name="annotatedPackages">
<list>
<value>com.landor.test.entity</value>
</list>
</property>
</bean>
<bean id="mySessionFactory2"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource">
<ref bean="myDataSource2" />
</property>

</bean>

<bean id="myTxManager" class="org.springframework.transaction.jta.JtaTransactionManager"/>

<tx:advice id="txAdvice" transaction-manager="myTxManager">
<tx:attributes>
<tx:method name="select*" read-only="true" propagation="REQUIRED"/>
<tx:method name="find*" read-only="true" propagation="REQUIRED"/>
<tx:method name="save*" propagation="REQUIRED" isolation="REPEATABLE_READ"/>
<tx:method name="update*" propagation="REQUIRED" isolation="REPEATABLE_READ"/>
<tx:method name="add*" propagation="REQUIRED" isolation="REPEATABLE_READ" />
<tx:method name="delete*" propagation="REQUIRED" isolation="REPEATABLE_READ"/>
</tx:attributes>
</tx:advice>

</beans>
ibatis：
ibatis与hibernate是一样的，只需要将hibernate的sessionFactory部分更换一下
......
<bean id="sqlMap1Client"
class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
<property name="dataSource" ref="myDataSource1" />
<property name="configLocation" value="xxx/SqlMapConfig.xml" />
</bean>
<bean id="sqlMap2Client"
class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
<property name="dataSource" ref="OssDS" />
<property name="configLocation" value="xxx/SqlMapConfig.xml" />
</bean>
......

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