Spring-AOP 自动创建代理之DefaultAdvisorAutoProxyCreator-CSDN博客

文章目录

• 导读
• 概述
• 实例

导读

Spring-AOP 自动创建代理

Spring-AOP 自动创建代理之BeanNameAutoProxyCreator

Spring-AOP 自动创建代理之DefaultAdvisorAutoProxyCreator

Spring-AOP 自动创建代理之AnnotationAwareAspectJAutoProxyCreator

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概述

我们知道切面Advisor是切点和增强的复合体，Advisor本身已经包含了足够的信息，如横切逻辑及连接点。

DefaultAdvisorAutoProxyCreator能够扫描Advisor,并将Advisor自动织入匹配的目标Bean中，即为匹配的目标Bean自动创建代理。

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实例

代码已托管到Github—> github.com/yangshangwe…

在 Spring-AOP 静态正则表达式方法匹配切面通过ProxyFactoryBean为waiter和seller配置了代理，如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
	
	<!-- 配置切面：静态正则表达式方法匹配切面 -->
	
	<!-- Waiter目标类 -->
	<bean id="waiterTarget" class="com.xgj.aop.spring.advisor.RegexpMethodPointcutAdvisor.Waiter"/>
	<!-- Seller目标类 -->
	<bean id="sellerTarget" class="com.xgj.aop.spring.advisor.RegexpMethodPointcutAdvisor.Seller"/>
	
	<!-- 前置增强 -->
	<bean id="greetBeforeAdvice" class="com.xgj.aop.spring.advisor.RegexpMethodPointcutAdvisor.GreetBeforeAdivce"/>
	
	<!-- 切面 -->
	<bean id="regexpAdvisor" class="org.springframework.aop.support.RegexpMethodPointcutAdvisor"
		p:advice-ref="greetBeforeAdvice"
		p:pattern=".*greet.*" > <!--  向切面注入一个前置增强  ， 用正则表达式定义目标类全限定方法名的匹配模式串 。-->
		
	</bean>
	<!-- 通过父bean,配置公共的信息 -->
	<bean id="parent" abstract="true"  
		class="org.springframework.aop.framework.ProxyFactoryBean"
		p:interceptorNames="regexpAdvisor"
		p:proxyTargetClass="true"/>

	<!-- waiter代理 -->
	<bean id="waiter" parent="parent" p:target-ref="waiterTarget"/>
	<!-- seller代理 -->
	<bean id="seller" parent="parent" p:target-ref="sellerTarget"/>
	
</beans>

在这里引入DefaultAdvisorAutoProxyCreator为容器中所有带 “greet”方法名的目标Bean自动创建代理，配置如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
	
	<!--通过Advisor自动创建代理-->
	
	<!-- 目标Bean -->
	<bean id="waiter" class="com.xgj.aop.spring.advisor.autoCreateProxy.DefaultAdvisorProxyCreator.Waiter"/>
	<bean id="seller" class="com.xgj.aop.spring.advisor.autoCreateProxy.DefaultAdvisorProxyCreator.Seller"/>
	
	<!-- 增强 -->
	<bean id="greetingBeforeAdvice" class="com.xgj.aop.spring.advisor.autoCreateProxy.DefaultAdvisorProxyCreator.GreetingBeforeAdvice"/>
	
	
	<!-- 切面 -->
	<bean id="regexpAdvisor" class="org.springframework.aop.support.RegexpMethodPointcutAdvisor"
		p:patterns=".*greet.*"
		p:advice-ref="greetingBeforeAdvice"/>
	
	<!-- 代理 -->
	<bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>

</beans>

最后一行，用DefaultAdvisorAutoProxyCreator定义一个Bean，它负责将容器中的Advisor织入匹配的目标Bean中。

测试类：

package com.xgj.aop.spring.advisor.autoCreateProxy.DefaultAdvisorProxyCreator;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class DefaultAdvisorProxyCreatorTest {

	@Test
	public void test() {
		ApplicationContext ctx = new ClassPathXmlApplicationContext(
				"classpath:com/xgj/aop/spring/advisor/autoCreateProxy/DefaultAdvisorProxyCreator/conf-defaultAdvisorProxyCreator.xml");

		Waiter waiter = ctx.getBean("waiter", Waiter.class);
		waiter.greetTo("XiaoGongJiang");
		waiter.serverTo("XiaoGongJiang");

		System.out.println("\n");

		Seller seller = ctx.getBean("seller", Seller.class);
		seller.greetTo("XiaoGongJiang");
		seller.serverTo("XiaoGongJiang");
	}
}

运行结果

2017-08-21 16:28:37,239  INFO [main] (AbstractApplicationContext.java:583) - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@eb6dcf9: startup date [Mon Aug 21 16:28:37 BOT 2017]; root of context hierarchy
2017-08-21 16:28:37,388  INFO [main] (XmlBeanDefinitionReader.java:317) - Loading XML bean definitions from class path resource [com/xgj/aop/spring/advisor/autoCreateProxy/DefaultAdvisorProxyCreator/conf-defaultAdvisorProxyCreator.xml]
Pointcut:com.xgj.aop.spring.advisor.autoCreateProxy.DefaultAdvisorProxyCreator.Waiter.greetTo
How are you XiaoGongJiang ?
Waiter Greet To XiaoGongJiang
Waiter Server To XiaoGongJiang


Pointcut:com.xgj.aop.spring.advisor.autoCreateProxy.DefaultAdvisorProxyCreator.Seller.greetTo
How are you XiaoGongJiang ?
Seller Greet To XiaoGongJiang
Seller Server To XiaoGongJiang

从运行结果中，只有greetTo方法被织入了增强，由此可见，增强被正确的织入匹配的连接点中。