Annotation实现缓存,Bean创建代理模式

这是BeanPostProcessor,生成一个代理对象

package org.frame.base.annotation.support;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;

import org.frame.base.annotation.intercept.ProxyHandler;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;

/**
 * 使用Ehcache代理来实现缓存拦截 
 *
 */
public class EhCacheBeanPostProcessor implements BeanPostProcessor{

	@Override
	public Object postProcessAfterInitialization(Object target, String beanName)
			throws BeansException { 
		return target;
	}

	@Override
	public Object postProcessBeforeInitialization(Object target, String beanName)
			throws BeansException {
		Class<?>[] interfaceClass = target.getClass().getInterfaces();
		InvocationHandler handler = new ProxyHandler(target);
		Object proxyObj = Proxy.newProxyInstance(target.getClass().getClassLoader(),
				interfaceClass, handler);
		return proxyObj;
	}

}

配置如下:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans default-autowire="byName">
	<!-- annotation intercept-->
	<!-- 
	<bean id="testIano"
		class="org.frame.base.annotation.support.EhCacheFactoryBean" init-method="init"> 
		<property name="target">
			<ref bean = "testI"/>
		</property> 
	</bean>
	 -->
	
	<!-- 原始结构 -->
	<bean id="testI" class ="org.frame.base.annotation.intercept.Test"/>
	
	<!-- Ehcache拦截，使用代理来实现 -->
	<bean id="beanPostProcessor" class="org.frame.base.annotation.support.EhCacheBeanPostProcessor" />
	
</beans>

测试代码如下:

	TestI testI = (TestI) cxt.getBean("testI");
		int a = 10;
		int b = 11;
		System.out.println(testI.add(a, b));
		System.out.println(testI.add(a, b));
		System.out.println(testI.xx(a));
		System.out.println(testI.xx(a));

具体的注解代码，请查看上一节。