Spirng AOP与事务配置记录

以下内容并不包括最新注解式的配置方法，为spring4.0，3.0,2.0适用的xml配置模式

Spring AOP与Transaction常见设置

<bean id="txDs" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="ds"></property>
</bean>

<tx:advice id="txAdvice" transaction-manager="txDs">
    <tx:attributes>
        <tx:method name="*" propagation="REQUIRED" isolation="DEFAULT" timeout="10000" read-only="false"/>
    </tx:attributes>
</tx:advice>

<aop:config>
    <aop:pointcut id="daopointcut" expression="execution(* app.aresxu.springweb.transaction.DaoSupportInterface.*(..))"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="daopointcut"/>
</aop:config>

顺序为 bean=》tx:advice=》aop，

transaction基础类为 PlatformTransactionManager

也可以使用spring早期提供的TransationProxyFactoryBean实现事务切面

 <bean name="transactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">
    <property name="transactionManager" ref="dataSourceTx"/>
   <property name="transactionAttributes">
     <props>
       <prop key="insert*">PROPAGATION_REQUIRED</prop>
       <prop key="update*">PROPAGATION_REQUIRED</prop>
       <prop key="*">PROPAGATION_REQUIRED,readOnly</prop>
     </props>
   </property>
 </bean> 

 <bean name="sqlmapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
    <property name="configLocation">
            <value>classpath:ibatis/IbatisBean_config.xml</value>
    </property>
    <property name="dataSource">
            <ref bean="dataSource"/>
    </property>
 </bean>

<bean name="internal_ibatisdao" class="com.web.dao.IbatisDao">
    <property name="sqlmap" ref="sqlmapClient"></property>
</bean>

<bean name="ibatis_dao" parent="transactionProxy">
    <property name="target" ref="internal_ibatisdao"/>
</bean>

也继承时可以修改方法事务等级：

<bean id="mySpecialService" parent="txProxyTemplate">
    <property name="target">
        <bean class="org.springframework.samples.MySpecialServiceImpl">
        </bean>
    </property>
    <property name="transactionAttributes">
        <props>
            <prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
            <prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
            <prop key="load*">PROPAGATION_REQUIRED,readOnly</prop>
            <prop key="store*">PROPAGATION_REQUIRED</prop>
        </props>
    </property>
</bean>

事务的PROPAGATION在org.springframework.transaction.TransactionDefinition 中定义

有关参数方面

aop:pointcut expression如下

• the execution of any public method:

execution(public * *(..))

• the execution of any method with a name beginning with "set":

execution(* set*(..))

• the execution of any method defined by the AccountService interface:

execution(* com.xyz.service.AccountService.*(..))

• the execution of any method defined in the service package:

execution(* com.xyz.service..(..))

• the execution of any method defined in the service package or a sub-package:

execution(* com.xyz.service...(..))

例如有：

execution(* x.y.service.*Service.get(String,int)) and args(name, age) 等形式

tx：method参数配置

Table 11.1. <tx:method/> settings

传统AOP配置有

<!-- this is the object that will be proxied by Spring‘s AOP infrastructure -->
    <bean id="fooService" class="x.y.service.DefaultFooService"/>

    <!-- this is the actual advice itself -->
    <bean id="profiler" class="x.y.SimpleProfiler"/>

    <aop:config>
        <aop:aspect ref="profiler">

            <aop:pointcut id="theExecutionOfSomeFooServiceMethod"
                expression="execution(* x.y.service.FooService.getFoo(String,int))
                and args(name, age)"/>

            <aop:around pointcut-ref="theExecutionOfSomeFooServiceMethod"
                method="profile"/>

        </aop:aspect>
    </aop:config>

package x.y;

import org.aspectj.lang.ProceedingJoinPoint;
import org.springframework.util.StopWatch;

public class SimpleProfiler {

    public Object profile(ProceedingJoinPoint call, String name, int age) throws Throwable {
        StopWatch clock = new StopWatch("Profiling for " + name + " and " + age + "");
        try {
            clock.start(call.toShortString());
            return call.proceed();
        } finally {
            clock.stop();
            System.out.println(clock.prettyPrint());
        }
    }
}

根据需要有before式，after式，around式及其他切入方法，这里是around

也可以使用早期spring提供的ProxyFactoryBean实现AOP

<bean id="personTarget" class="com.mycompany.PersonImpl">
    <property name="name" value="Tony"/>
    <property name="age" value="51"/>
</bean>

<bean id="myAdvisor" class="com.mycompany.MyAdvisor">
    <property name="someProperty" value="Custom string property value"/>
</bean>

<bean id="debugInterceptor" class="org.springframework.aop.interceptor.DebugInterceptor">
</bean>

<bean id="person"
    class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="proxyInterfaces" value="com.mycompany.Person"/>

    <property name="target" ref="personTarget"/>
    <property name="interceptorNames">
        <list>
            <value>myAdvisor</value>
            <value>debugInterceptor</value>
        </list>
    </property>
</bean>

使用这一类的ProxyAop 需要切面类继承一系列类（根据需要使用）

Advice是Advice型切面的超级接口，派生的子接口都有advice切面功能。

MethodInterceptor

BeforeAdvice 

ThrowsAdvice 

AfterReturningAdvice 

IntroductionInfo 

Advisor

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