spring+hibernate+JTA 分布式事务的例子 .

对于横跨多个Hibernate SessionFacotry的分布式事务，只需简单地将 JtaTransactionManager 同多个 LocalSessionFactoryBean 的定义结合起来作为事务策略。你的每一个DAO通过bean属性得到各自的 SessionFactory 引用。如果所有的底层JDBC数据源都是支持事务的容器，那么只要业务对象使用了 JtaTransactionManager 作为事务策略，它就可以横跨多个DAO和多个session factories来划分事务，而不需要做任何特殊处理。

<beans><bean id="myDataSource1" class="org.springframework.jndi.JndiObjectFactoryBean"><property name="jndiName" value="java:comp/env/jdbc/myds1"/></bean><bean id="myDataSource2" class="org.springframework.jndi.JndiObjectFactoryBean"><property name="jndiName" value="java:comp/env/jdbc/myds2"/></bean><bean id="mySessionFactory1" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="dataSource" ref="myDataSource1"/><property name="mappingResources"><list><value>product.hbm.xml</value></list></property><property name="hibernateProperties"><value>
        hibernate.dialect=org.hibernate.dialect.MySQLDialect
        hibernate.show_sql=true</value></property></bean><bean id="mySessionFactory2" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="dataSource" ref="myDataSource2"/><property name="mappingResources"><list><value>inventory.hbm.xml</value></list></property><property name="hibernateProperties"><value>
        hibernate.dialect=org.hibernate.dialect.OracleDialect</value></property></bean><bean id="myTxManager" class="org.springframework.transaction.jta.JtaTransactionManager"/><bean id="myProductDao" class="product.ProductDaoImpl"><property name="sessionFactory" ref="mySessionFactory1"/></bean><bean id="myInventoryDao" class="product.InventoryDaoImpl"><property name="sessionFactory" ref="mySessionFactory2"/></bean><!-- this shows the Spring 1.x style of declarative transaction configuration --><!-- it is totally supported, 100% legal in Spring 2.x, but see also above for the sleeker, Spring 2.0 style --><bean id="myProductService"
      class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"><property name="transactionManager" ref="myTxManager"/><property name="target"><bean class="product.ProductServiceImpl"><property name="productDao" ref="myProductDao"/><property name="inventoryDao" ref="myInventoryDao"/></bean></property><property name="transactionAttributes"><props><prop key="increasePrice*">PROPAGATION_REQUIRED</prop><prop key="someOtherBusinessMethod">PROPAGATION_REQUIRES_NEW</prop><prop key="*">PROPAGATION_SUPPORTS,readOnly</prop></props></property></bean></beans>

<bean id="myDataSource1" class="org.springframework.jndi.JndiObjectFactoryBean">  <property name="jndiName" value="java:comp/env/jdbc/myds1"/>  </bean>  <bean id="myDataSource2" class="org.springframework.jndi.JndiObjectFactoryBean">  <property name="jndiName" value="java:comp/env/jdbc/myds2"/>  </bean>  <bean id="mySessionFactory1" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  <property name="dataSource" ref="myDataSource1"/>  <property name="mappingResources">  <list>  <value>product.hbm.xml</value>  </list>  </property>  <property name="hibernateProperties">  <value>  
        hibernate.dialect=org.hibernate.dialect.MySQLDialect   
        hibernate.show_sql=true  </value>  </property>  </bean>  <bean id="mySessionFactory2" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  <property name="dataSource" ref="myDataSource2"/>  <property name="mappingResources">  <list>  <value>inventory.hbm.xml</value>  </list>  </property>  <property name="hibernateProperties">  <value>  
        hibernate.dialect=org.hibernate.dialect.OracleDialect   </value>  </property>  </bean>  <bean id="myTxManager" class="org.springframework.transaction.jta.JtaTransactionManager"/>  <bean id="myProductDao" class="product.ProductDaoImpl">  <property name="sessionFactory" ref="mySessionFactory1"/>  </bean>  <bean id="myInventoryDao" class="product.InventoryDaoImpl">  <property name="sessionFactory" ref="mySessionFactory2"/>  </bean>  <bean id="myProductService" class="product.service.myProductServiceImpl">  <property name="productDao" ref="myProductDao"/>  <property name="inventoryDao" ref="myInventoryDao"/>  </bean>  <aop:config><aop:pointcut id="managerTx"
			expression="execution(* product.service..*Service.*(..))" /><aop:advisor advice-ref="txAdvice" pointcut-ref="managerTx" /></aop:config><tx:advice id="txAdvice" transaction-manager="myTxManager"><tx:attributes><tx:method name="get*" read-only="true" /><tx:method name="find*" read-only="true" /><tx:method name="save*" propagation="REQUIRED" /><tx:method name="remove*" propagation="REQUIRED" /><tx:method name="*" /></tx:attributes></tx:advice>

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