Configuring Different Transactional Semantics for Different Beans
考虑以下场景：你有一些服务层对象，并且你希望为每个对象应用一个完全不同的事务配置。你可以通过定义不同的 <aop:advisor/> 元素（带有不同的 pointcut 和 advice-ref 属性值）来实现这一点。
作为比较的出发点，首先假设你的所有服务层类都被定义在根 x.y.service 包中。为了使该包（或子包）中定义的类的所有 Bean 实例（以及以 Service 结尾的名称）具有默认的事务配置，你可以编写以下内容：
<?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:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<aop:config>
<aop:pointcut id="serviceOperation"
expression="execution(* x.y.service..*Service.*(..))"/>
<aop:advisor pointcut-ref="serviceOperation" advice-ref="txAdvice"/>
</aop:config>
<!-- these two beans will be transactional... -->
<bean id="fooService" class="x.y.service.DefaultFooService"/>
<bean id="barService" class="x.y.service.extras.SimpleBarService"/>
<!-- ... and these two beans won't -->
<bean id="anotherService" class="org.xyz.SomeService"/> <!-- (not in the right package) -->
<bean id="barManager" class="x.y.service.SimpleBarManager"/> <!-- (doesn't end in 'Service') -->
<tx:advice id="txAdvice">
<tx:attributes>
<tx:method name="get*" read-only="true"/>
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
<!-- other transaction infrastructure beans such as a TransactionManager omitted... -->
</beans>以下示例展示了如何用完全不同的事务设置来配置两个不同的 Bean：
<?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:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<aop:config>
<aop:pointcut id="defaultServiceOperation"
expression="execution(* x.y.service.*Service.*(..))"/>
<aop:pointcut id="noTxServiceOperation"
expression="execution(* x.y.service.ddl.DefaultDdlManager.*(..))"/>
<aop:advisor pointcut-ref="defaultServiceOperation" advice-ref="defaultTxAdvice"/>
<aop:advisor pointcut-ref="noTxServiceOperation" advice-ref="noTxAdvice"/>
</aop:config>
<!-- this bean will be transactional (see the 'defaultServiceOperation' pointcut) -->
<bean id="fooService" class="x.y.service.DefaultFooService"/>
<!-- this bean will also be transactional, but with totally different transactional settings -->
<bean id="anotherFooService" class="x.y.service.ddl.DefaultDdlManager"/>
<tx:advice id="defaultTxAdvice">
<tx:attributes>
<tx:method name="get*" read-only="true"/>
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
<tx:advice id="noTxAdvice">
<tx:attributes>
<tx:method name="*" propagation="NEVER"/>
</tx:attributes>
</tx:advice>
<!-- other transaction infrastructure beans such as a TransactionManager omitted... -->
</beans>