Spring AOP源码篇二之代理工厂ProxyFactory学习

了解AspectJ表达式以及PointCut、Advice、Advisor后，继续学习Spring AOP代理工厂

AspectJ表达式参考：Spring AOP之AspectJ表达式-CSDN博客

PointCut、Advice、Advisor参考：Spring AOP源码篇一之 PointCut、Advice、Advisor学习-CSDN博客

简单代码示例：

package org.spring.aop.proxy.service;

public interface IUserService {
    void say();
}

package org.spring.aop.proxy.service;

public class UserService implements IUserService {
    public void say() {
        System.out.println("Hello world!!");
    }
}

package org.spring.aop.proxy.advice;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

public class LogAdvice implements MethodInterceptor {
	@Override
	public Object invoke(MethodInvocation methodInvocation) throws Throwable {
		System.out.println("===============log record start==============");
		Object object = methodInvocation.proceed();
		System.out.println("===============log record end================");
		return object;
	}
}

测试代码：

package org.spring.aop.proxy;

import org.spring.aop.proxy.advice.LogAdvice;
import org.spring.aop.proxy.service.IUserService;
import org.spring.aop.proxy.service.UserService;
import org.springframework.aop.Advisor;
import org.springframework.aop.aspectj.AspectJExpressionPointcut;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.DefaultPointcutAdvisor;

public class ProxyFactoryTest {
    public static void main(String[] args) {
        System.setProperty("sun.misc.ProxyGenerator.saveGeneratedFiles", "true");
        IUserService service = new UserService();
        ProxyFactory proxyFactory = new ProxyFactory(service);
        IUserService serviceProxy = (IUserService) proxyFactory.getProxy();
        //不打印toString是因为代理对象底层toString调的是目标对象的toString,二者toString内容一样。
        System.out.printf("原始对象[%s]====代理对象[%s]====[比较二者：%s]\n", service.hashCode(), serviceProxy.hashCode(), (service == serviceProxy));
        serviceProxy.say();

        System.out.println("\n-------------对目标对象增强功能-----------------\n");
        String expression = "execution(* org.spring.aop.proxy.service.UserService.*(..))";
        Advisor advisor = buildAdvisor(expression);
        proxyFactory.addAdvisor(advisor);
        serviceProxy = (IUserService) proxyFactory.getProxy();
        serviceProxy.say();
    }

    public static Advisor buildAdvisor(String expression) {
        //创建pointcut
        AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut();
        pointcut.setExpression(expression);

        //创建advice
        LogAdvice advice = new LogAdvice();

        //创建advisor
        Advisor advisor = new DefaultPointcutAdvisor(pointcut, advice);

        return advisor;
    }
}

执行结果：

代理工厂ProxyFactory继承体系

Advised是个配置管理类，对Advisor、Advice进行配置管理

package org.springframework.aop.framework;

import org.aopalliance.aop.Advice;

import org.springframework.aop.Advisor;
import org.springframework.aop.TargetClassAware;
import org.springframework.aop.TargetSource;
import org.springframework.aop.framework.AopConfigException;

public interface Advised extends TargetClassAware {

	/**
	 * 判断advised配置是否冻结
	 * 一旦冻结，不允许删除或增加Advisor和Adivce
	 */
	boolean isFrozen();

	/**
	 * 判断是否直接代理目标类，而不是目标类的父接口
	 * Spring中代理分为JDK动态代理、CGLIB代理；JDK动态代理的是父接口，CGLIB代理的是目标类（具体类）
	 */
	boolean isProxyTargetClass();

	/**
	 * 返回目标对象的父接口，如果目标对象类型是接口则包含其中，如果不是接口则不包含其中。
	 * 如果advice是引介增强的话，advice的接口也会放入其中。
	 */
	Class<?>[] getProxiedInterfaces();

	/**
	 * 判断指定的接口是否已被代理（被代理的接口一般是目标类的父接口，
	 * 默认Spring Aop会为目标对象的代理对象额外添加两个父接口SpringProxy、Advised）
	 */
	boolean isInterfaceProxied(Class<?> intf);


	/*
		/*public interface TargetSource extends TargetClassAware {
			/**
			 * 返回目标对象类型
			 *//*
			Class<?> getTargetClass();

			*//**
			 * 判断目标对象是否为静态
			 *//*
			boolean isStatic();

			*//**
			 * 返回目标对象
			 *//*
			Object getTarget() throws Exception;

			*//**
			 * 释放销毁目标对象(spring中该方法基本都是空实现)，getTarget()时重新创建
			 *//*
			void releaseTarget(Object target) throws Exception;
		}
	 */
	/**
	 * 设置被代理的目标对象TargetSource（目标对象被封装在TargetSource）
	 */
	void setTargetSource(TargetSource targetSource);

	/**
	 * 返回被代理目标对象的TargetSource（目标对象被封装在TargetSource中）
	 */
	TargetSource getTargetSource();

	/**
	 * 代理对象是否设置到AOP框架中的ThreadLocal中
	 */
	void setExposeProxy(boolean exposeProxy);

	/**
	 * 判断代理对象是否被设置到了AOP框架中的ThreadLocal中
	 */
	boolean isExposeProxy();

	/**
	 * 设置所有添加的advisor是否已经提前过滤过了（advisor和目标对象已经提前匹配过了）
	 * 也就是所添加advisor的Advice已经是完全可以应用到目标对象上的
	 */
	void setPreFiltered(boolean preFiltered);

	/**
	 * 判断所有添加的advisor是否已经提前过滤过了
	 */
	boolean isPreFiltered();

	/**
	 * 返回Advisor列表
	 */
	Advisor[] getAdvisors();

	/**
	 * 添加Advisor
	 */
	void addAdvisor(Advisor advisor) throws AopConfigException;

	/**
	 * 在指定位置添加Advisor
	 */
	void addAdvisor(int pos, Advisor advisor) throws AopConfigException;

	/**
	 * 删除Advisor，不存在的话不做删除
	 */
	boolean removeAdvisor(Advisor advisor);

	/**
	 * 删除指定位置Advisor，index无效的话会报异常
	 */
	void removeAdvisor(int index) throws AopConfigException;

	/**
	 * 返回advisor位置，不存在返回-1
	 */
	int indexOf(Advisor advisor);

	/**
	 * 用新的advisor替换旧的advisor(b替换a)
	 * <p><b>Note:</b>如果旧advisor实现了接口{@link org.springframework.aop.IntroductionAdvisor}
	 * 会将旧advisor的父类接口从配置interfaces中删除，List<Class> interfaces是Advised的属性(在子类：AdvisedSupport)
	 */
	boolean replaceAdvisor(Advisor a, Advisor b) throws AopConfigException;

	/**
	 * 添加Advice
	 */
	void addAdvice(Advice advice) throws AopConfigException;

	/**
	 * 在指定位置添加advice，对应创建Advisor（类型为：DefaultPointcutAdvisor）
	 * DefaultPointcutAdvisor里面的pointcut为Pointcut.TRUE，和目标对象总是匹配的
	 */
	void addAdvice(int pos, Advice advice) throws AopConfigException;

	/**
	 * 删除advice，成功返回true，失败返回false（对应的Advisor也被删除）
	 */
	boolean removeAdvice(Advice advice);

	/**
	 * 返回advice位置，不存在返回-1
	 */
	int indexOf(Advice advice);

	/**
	 * 返回Advised的配置信息，等效toString()，内部一般是调用toString方法
	 */
	String toProxyConfigString();

}

ProxyConfig是个代理配置管理类，对代理配置进行设置

package org.springframework.aop.framework;

import java.io.Serializable;

import org.springframework.util.Assert;

public class ProxyConfig implements Serializable {

	/** use serialVersionUID from Spring 1.2 for interoperability */
	private static final long serialVersionUID = -8409359707199703185L;


	private boolean proxyTargetClass = false;

	private boolean optimize = false;

	boolean opaque = false;

	boolean exposeProxy = false;

	private boolean frozen = false;


	/**
	 * 设置是否直接代理目标类，而不是目标类的父接口
	 * Spring中代理分为JDK动态代理、CGLIB代理；JDK动态代理是接口，CGLIB代理是目标类（具体类）
	 */
	public void setProxyTargetClass(boolean proxyTargetClass) {
		this.proxyTargetClass = proxyTargetClass;
	}

	/**
	 * 判断是否直接代理的目标类，而不是目标类的父接口
	 * Spring中代理分为JDK动态代理、CGLIB代理；JDK动态代理是接口，CGLIB代理是目标类（具体类）
	 */
	public boolean isProxyTargetClass() {
		return this.proxyTargetClass;
	}

	/**
	 * 设置是否进行优化
	 */
	public void setOptimize(boolean optimize) {
		this.optimize = optimize;
	}

	/**
	 * 判断是否进行优化
	 */
	public boolean isOptimize() {
		return this.optimize;
	}

	/**
	 * Spring AOP在生成代理对象时，默认为代理对象添加接口Advised。
	 * opaque如果为true，则不会添加，举例：
	 * interface IService{}
	 * class A implements IService{}，
	 *
	 * 如果opaque为false：
	 *  A生成的代理对象为：Proxy.newProxyInstance(ClassLoader, new Class[]{Advised.class, IService.class}, InvocationHandler);
	 *  如果opaque为true：
	 *  A生成的代理对象为：Proxy.newProxyInstance(ClassLoader, new Class[]{IService.class}, InvocationHandler);
	 */
	public void setOpaque(boolean opaque) {
		this.opaque = opaque;
	}

	/**
	 * 判断是否阻止为创建的代理对象添加接口Advised
	 */
	public boolean isOpaque() {
		return this.opaque;
	}

	/**
	 * 将代理对象是否设置到AOP框架中的ThreadLocal中
	 */
	public void setExposeProxy(boolean exposeProxy) {
		this.exposeProxy = exposeProxy;
	}

	/**
	 * 判断代理对象是否被设置到了AOP框架中的ThreadLocal中
	 */
	public boolean isExposeProxy() {
		return this.exposeProxy;
	}

	/**
	 * 设置advised配置是否冻结
	 *  一旦冻结，不允许删除或增加Advisor和Adivce
	 */
	public void setFrozen(boolean frozen) {
		this.frozen = frozen;
	}

	/**
	 * 判断advised配置是否冻结
	 * 一旦冻结，不允许删除或增加Advisor和Adivce
	 */
	public boolean isFrozen() {
		return this.frozen;
	}


	/**
	 * 复制代理配置内容
	 */
	public void copyFrom(ProxyConfig other) {
		Assert.notNull(other, "Other ProxyConfig object must not be null");
		this.proxyTargetClass = other.proxyTargetClass;
		this.optimize = other.optimize;
		this.exposeProxy = other.exposeProxy;
		this.frozen = other.frozen;
		this.opaque = other.opaque;
	}

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append("proxyTargetClass=").append(this.proxyTargetClass).append("; ");
		sb.append("optimize=").append(this.optimize).append("; ");
		sb.append("opaque=").append(this.opaque).append("; ");
		sb.append("exposeProxy=").append(this.exposeProxy).append("; ");
		sb.append("frozen=").append(this.frozen);
		return sb.toString();
	}

}

类AdvisedSupport对接口Advised中的方法做了具体实现

类ProxyCreatorSupport对接口ProxyConfig中的方法做了具体实现

ProxyFactory: 根据上面的配置，创建代理对象

package org.springframework.aop.framework;

import org.aopalliance.intercept.Interceptor;

import org.springframework.aop.TargetSource;
import org.springframework.util.ClassUtils;

public class ProxyFactory extends ProxyCreatorSupport {

	/**
	 * 无参构造函数
	 */
	public ProxyFactory() {
	}

	/**
	 * 根据被代理目标类对象创建ProxyFactory
	 * @param target
	 */
	public ProxyFactory(Object target) {
		setTarget(target);
		//获取被代理目标类对象上的接口，设置为被代理接口
		setInterfaces(ClassUtils.getAllInterfaces(target));
	}

	/**
	 * 根据被代理接口Class创建ProxyFactory
	 * @param proxyInterfaces
	 */
	public ProxyFactory(Class<?>... proxyInterfaces) {
		setInterfaces(proxyInterfaces);
	}

	/**
	 * 根据被代理接口Class、Advice创建ProxyFactory
	 * @param proxyInterface
	 * @param interceptor
	 */
	public ProxyFactory(Class<?> proxyInterface, Interceptor interceptor) {
		addInterface(proxyInterface);
		addAdvice(interceptor);
	}

	/**
	 * 根据被代理接口Class、被代理目标类对象(被封装在TargetSource中)创建ProxyFactory
	 * @param proxyInterface
	 * @param targetSource
	 */
	public ProxyFactory(Class<?> proxyInterface, TargetSource targetSource) {
		addInterface(proxyInterface);
		setTargetSource(targetSource);
	}

	/**
	 * 创建代理对象，关键入口
	 * 源码分析：节点1
	 * @return
	 */
	public Object getProxy() {
		//createAopProxy()，源码分析：节点2，具体实现位于父类ProxyCreatorSupport.createAopProxy()
		return createAopProxy().getProxy();
	}

	/**
	 * 创建代理对象
	 * @param classLoader
	 * 		类加载器
	 * @return
	 */
	public Object getProxy(ClassLoader classLoader) {
		return createAopProxy().getProxy(classLoader);
	}

	/**
	 * 创建代理对象
	 * @param proxyInterface
	 * 		被代理的接口
	 * @param interceptor
	 * 		Advice对象
	 * @return
	 */
	public static <T> T getProxy(Class<T> proxyInterface, Interceptor interceptor) {
		return (T) new ProxyFactory(proxyInterface, interceptor).getProxy();
	}

	/**
	 * 创建代理对象
	 * @param proxyInterface
	 * 		被代理的接口
	 * @param targetSource
	 * 		被代理的目标类对象(被封装在TargetSource中)
	 * @return
	 */
	public static <T> T getProxy(Class<T> proxyInterface, TargetSource targetSource) {
		return (T) new ProxyFactory(proxyInterface, targetSource).getProxy();
	}

	/**
	 * 创建代理对象
	 * @param targetSource
	 * 		被代理的目标类对象(被封装在TargetSource中)
	 * @return
	 */
	public static Object getProxy(TargetSource targetSource) {
		if (targetSource.getTargetClass() == null) {
			throw new IllegalArgumentException("Cannot create class proxy for TargetSource with null target class");
		}
		ProxyFactory proxyFactory = new ProxyFactory();
		proxyFactory.setTargetSource(targetSource);
		//采用直接代理目标类（cglib）方式
		proxyFactory.setProxyTargetClass(true);
		return proxyFactory.getProxy();
	}

}

package org.springframework.aop.framework;

import java.util.LinkedList;
import java.util.List;

import org.springframework.util.Assert;

public class ProxyCreatorSupport extends AdvisedSupport {

	//Aop代理工厂，从继承关系上看和ProxyFactory没有关系
	private AopProxyFactory aopProxyFactory;

	private List<AdvisedSupportListener> listeners = new LinkedList<AdvisedSupportListener>();

	//标记AopProxy对象是否已经创建，AopProxy是真正创建代理的类。
	private boolean active = false;


	/**
	 * 无参构造函数
	 * 	核心代码，里面创建this.aopProxyFactory = new DefaultAopProxyFactory();
	 */
	public ProxyCreatorSupport() {
		this.aopProxyFactory = new DefaultAopProxyFactory();
	}
	
	public ProxyCreatorSupport(AopProxyFactory aopProxyFactory) {
		this.aopProxyFactory = aopProxyFactory;
	}
	
	public void setAopProxyFactory(AopProxyFactory aopProxyFactory) {
		this.aopProxyFactory = aopProxyFactory;
	}
	
	public AopProxyFactory getAopProxyFactory() {
		return this.aopProxyFactory;
	}
	
	public void addListener(AdvisedSupportListener listener) {
		this.listeners.add(listener);
	}
	
	public void removeListener(AdvisedSupportListener listener) {
		this.listeners.remove(listener);
	}


	/**
	 * 源码分析：节点2
	 * @return
	 */
	protected final synchronized AopProxy createAopProxy() {
		if (!this.active) {
			activate();
		}
		//源码分析：节点3
		//getAopProxyFactory()默认构造函数创建的aopProxyFactory= new DefaultAopProxyFactory()
		//aopProxyFactory.createAopProxy()创建AopProxy
		return getAopProxyFactory().createAopProxy(this);
	}
	
	private void activate() {
		this.active = true;
		for (AdvisedSupportListener listener : this.listeners) {
			listener.activated(this);
		}
	}
	
	@Override
	protected void adviceChanged() {
		super.adviceChanged();
		synchronized (this) {
			if (this.active) {
				for (AdvisedSupportListener listener : this.listeners) {
					listener.adviceChanged(this);
				}
			}
		}
	}
	
	protected final synchronized boolean isActive() {
		return this.active;
	}

}

package org.springframework.aop.framework;

import java.io.Serializable;

import org.springframework.aop.SpringProxy;

public class DefaultAopProxyFactory implements AopProxyFactory, Serializable {

	//源码分析：节点3
	//创建AopProxy对象，分为：JdkDynamicAopProxy和CglibAopProxy
	public AopProxy createAopProxy(AdvisedSupport config) throws AopConfigException {
		if (config.isOptimize() || config.isProxyTargetClass() || hasNoUserSuppliedProxyInterfaces(config)) {
			Class targetClass = config.getTargetClass();
			if (targetClass == null) {
				throw new AopConfigException("TargetSource cannot determine target class: " +
						"Either an interface or a target is required for proxy creation.");
			}
			if (targetClass.isInterface()) {
                //源码分析：节点4
				//创建JDK动态代理
				return new JdkDynamicAopProxy(config);
			}
			return CglibProxyFactory.createCglibProxy(config);
		}
		else {
			return new JdkDynamicAopProxy(config);
		}
	}
	
	private boolean hasNoUserSuppliedProxyInterfaces(AdvisedSupport config) {
		Class[] interfaces = config.getProxiedInterfaces();
		return (interfaces.length == 0 || (interfaces.length == 1 && SpringProxy.class.equals(interfaces[0])));
	}
	
	private static class CglibProxyFactory {

		public static AopProxy createCglibProxy(AdvisedSupport advisedSupport) {
			return new CglibAopProxy(advisedSupport);
		}
	}

}

以JDK动态代理为例：

package org.springframework.aop.framework;

import java.io.Serializable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.List;

import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.aop.AopInvocationException;
import org.springframework.aop.RawTargetAccess;
import org.springframework.aop.TargetSource;
import org.springframework.aop.support.AopUtils;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;

final class JdkDynamicAopProxy implements AopProxy, InvocationHandler, Serializable {

	/** use serialVersionUID from Spring 1.2 for interoperability */
	private static final long serialVersionUID = 5531744639992436476L;

	private static final Log logger = LogFactory.getLog(JdkDynamicAopProxy.class);

	//advised配置对象
	private final AdvisedSupport advised;

	//是否有equals方法
	private boolean equalsDefined;

	//是否有hashCode方法
	private boolean hashCodeDefined;

	/**
	 * 构造函数
	 *
	 * @param config
	 * 		advised配置对象
	 */
	public JdkDynamicAopProxy(AdvisedSupport config) throws AopConfigException {
		Assert.notNull(config, "AdvisedSupport must not be null");
		if (config.getAdvisors().length == 0 && config.getTargetSource() == AdvisedSupport.EMPTY_TARGET_SOURCE) {
			throw new AopConfigException("No advisors and no TargetSource specified");
		}
		this.advised = config;
	}

	//获取代理对象，核心代码
	public Object getProxy() {
		return getProxy(ClassUtils.getDefaultClassLoader());
	}

	//源码分析：节点4
	//获取代理对象，核心代码
	public Object getProxy(ClassLoader classLoader) {
		if (logger.isDebugEnabled()) {
			logger.debug("Creating JDK dynamic proxy: target source is " + this.advised.getTargetSource());
		}
		//从配置advised中获取被代理的接口
		Class<?>[] proxiedInterfaces = AopProxyUtils.completeProxiedInterfaces(this.advised);
		findDefinedEqualsAndHashCodeMethods(proxiedInterfaces);
		//创建代理对象
		return Proxy.newProxyInstance(classLoader, proxiedInterfaces, this);
	}
	
	//为equalsDefined和hashCodeDefined赋值
	private void findDefinedEqualsAndHashCodeMethods(Class<?>[] proxiedInterfaces) {
		for (Class<?> proxiedInterface : proxiedInterfaces) {
			Method[] methods = proxiedInterface.getDeclaredMethods();
			for (Method method : methods) {
				if (AopUtils.isEqualsMethod(method)) {
					this.equalsDefined = true;
				}
				if (AopUtils.isHashCodeMethod(method)) {
					this.hashCodeDefined = true;
				}
				if (this.equalsDefined && this.hashCodeDefined) {
					return;
				}
			}
		}
	}


	//源码分析：节点5
	//JDK动态代理接口InvocationHandler固定方法，每次调用目标类方法时，先执行该方法。
	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
		MethodInvocation invocation;
		Object oldProxy = null;
		boolean setProxyContext = false;

		TargetSource targetSource = this.advised.targetSource;
		Class<?> targetClass = null;
		Object target = null;

		try {
			if (!this.equalsDefined && AopUtils.isEqualsMethod(method)) {
				return equals(args[0]);
			}
			if (!this.hashCodeDefined && AopUtils.isHashCodeMethod(method)) {
				return hashCode();
			}
			if (!this.advised.opaque && method.getDeclaringClass().isInterface() &&
					method.getDeclaringClass().isAssignableFrom(Advised.class)) {
				return AopUtils.invokeJoinpointUsingReflection(this.advised, method, args);
			}

			Object retVal;

			if (this.advised.exposeProxy) {
				//将代理对象proxy放入TreadLocal中
				oldProxy = AopContext.setCurrentProxy(proxy);
				setProxyContext = true;
			}

			//获取目标对象
			target = targetSource.getTarget();
			if (target != null) {
				targetClass = target.getClass();
			}

            //源码分析：节点6
			// 从配置advised中获取所有的Advice
			List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass);
			
			if (chain.isEmpty()) { //advice列表为空，直接执行目标类的目标方法
				retVal = AopUtils.invokeJoinpointUsingReflection(target, method, args);
			}
			else {
				//源码分析：节点7
				//匹配且挨个执行Advice
				invocation = new ReflectiveMethodInvocation(proxy, target, method, args, targetClass, chain);
				retVal = invocation.proceed();
			}
			
			Class<?> returnType = method.getReturnType();
			if (retVal != null && retVal == target && returnType.isInstance(proxy) &&
					!RawTargetAccess.class.isAssignableFrom(method.getDeclaringClass())) {
				retVal = proxy;
			} else if (retVal == null && returnType != Void.TYPE && returnType.isPrimitive()) {
				throw new AopInvocationException("Null return value from advice does not match primitive return type for: " + method);
			}
			return retVal;
		}
		finally {
			if (target != null && !targetSource.isStatic()) {
				// Must have come from TargetSource.
				targetSource.releaseTarget(target);
			}
			if (setProxyContext) {
				// Restore old proxy.
				AopContext.setCurrentProxy(oldProxy);
			}
		}
	}
	
	@Override
	public boolean equals(Object other) {
		if (other == this) {
			return true;
		}
		if (other == null) {
			return false;
		}

		JdkDynamicAopProxy otherProxy;
		if (other instanceof JdkDynamicAopProxy) {
			otherProxy = (JdkDynamicAopProxy) other;
		}
		else if (Proxy.isProxyClass(other.getClass())) {
			InvocationHandler ih = Proxy.getInvocationHandler(other);
			if (!(ih instanceof JdkDynamicAopProxy)) {
				return false;
			}
			otherProxy = (JdkDynamicAopProxy) ih;
		}
		else {
			// Not a valid comparison...
			return false;
		}

		// If we get here, otherProxy is the other AopProxy.
		return AopProxyUtils.equalsInProxy(this.advised, otherProxy.advised);
	}

	/**
	 * Proxy uses the hash code of the TargetSource.
	 */
	@Override
	public int hashCode() {
		return JdkDynamicAopProxy.class.hashCode() * 13 + this.advised.getTargetSource().hashCode();
	}

}

总结一下调用链路：

ProxyFactory===创建===》AopProxyFactory(默认实现：DefaultAopProxyFactory)===创建===》AopProxy（JdkDynamicAopProxy||CglibAopProxy）

AopProxy完成代理对象创建和调用。

============================================================

源码分析：节点6，AdvisedSupport#getInterceptorsAndDynamicInterceptionAdvice==》

AdvisorChainFactory#getInterceptorsAndDynamicInterceptionAdvice，进入到DefaultAdvisorChainFactory

package org.springframework.aop.framework;

import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.aopalliance.intercept.Interceptor;
import org.aopalliance.intercept.MethodInterceptor;

import org.springframework.aop.Advisor;
import org.springframework.aop.IntroductionAdvisor;
import org.springframework.aop.MethodMatcher;
import org.springframework.aop.PointcutAdvisor;
import org.springframework.aop.framework.AdvisorChainFactory;
import org.springframework.aop.framework.adapter.AdvisorAdapterRegistry;
import org.springframework.aop.framework.adapter.GlobalAdvisorAdapterRegistry;
import org.springframework.aop.support.MethodMatchers;

public class DefaultAdvisorChainFactory implements AdvisorChainFactory, Serializable {

	//获取匹配的Advice列表
	public List<Object> getInterceptorsAndDynamicInterceptionAdvice(
			Advised config, Method method, Class targetClass) {
		List<Object> interceptorList = new ArrayList<Object>(config.getAdvisors().length);
		boolean hasIntroductions = hasMatchingIntroductions(config, targetClass);
		//里面注册着Advisor适配器，例如：ThrowsAdvice类型的会被转为ThrowsAdviceInterceptor
        AdvisorAdapterRegistry registry = GlobalAdvisorAdapterRegistry.getInstance();
		for (Advisor advisor : config.getAdvisors()) {
			if (advisor instanceof PointcutAdvisor) {
				// 从Advised配置中获取Advisor
				PointcutAdvisor pointcutAdvisor = (PointcutAdvisor) advisor;
				// 获取ClassFilter过滤类
				if (config.isPreFiltered() || pointcutAdvisor.getPointcut().getClassFilter().matches(targetClass)) {
					MethodInterceptor[] interceptors = registry.getInterceptors(advisor);
					MethodMatcher mm = pointcutAdvisor.getPointcut().getMethodMatcher();
					// 获取MethodMatcher过滤方法
					if (MethodMatchers.matches(mm, method, targetClass, hasIntroductions)) {
						if (mm.isRuntime()) {
							for (MethodInterceptor interceptor : interceptors) { //如果是动态匹配，包装一层InterceptorAndDynamicMethodMatcher
								interceptorList.add(new InterceptorAndDynamicMethodMatcher(interceptor, mm));
							}
						}
						else {
							interceptorList.addAll(Arrays.asList(interceptors));
						}
					}
				}
			}
			else if (advisor instanceof IntroductionAdvisor) { //如果是引介增强，只需要过滤类
				IntroductionAdvisor ia = (IntroductionAdvisor) advisor;
				if (config.isPreFiltered() || ia.getClassFilter().matches(targetClass)) {
					Interceptor[] interceptors = registry.getInterceptors(advisor);
					interceptorList.addAll(Arrays.asList(interceptors));
				}
			}
			else {
				Interceptor[] interceptors = registry.getInterceptors(advisor);
				interceptorList.addAll(Arrays.asList(interceptors));
			}
		}
		return interceptorList;
	}

	/**
	 * Determine whether the Advisors contain matching introductions.
	 */
	private static boolean hasMatchingIntroductions(Advised config, Class targetClass) {
		for (int i = 0; i < config.getAdvisors().length; i++) {
			Advisor advisor = config.getAdvisors()[i];
			if (advisor instanceof IntroductionAdvisor) {
				IntroductionAdvisor ia = (IntroductionAdvisor) advisor;
				if (ia.getClassFilter().matches(targetClass)) {
					return true;
				}
			}
		}
		return false;
	}

}

源码分析：节点7，ReflectiveMethodInvocation#proceed

package org.springframework.aop.framework;

package org.spring.aop.proxyfactory;

import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

import org.springframework.aop.ProxyMethodInvocation;
import org.springframework.aop.support.AopUtils;
import org.springframework.core.BridgeMethodResolver;

public class ReflectiveMethodInvocation implements ProxyMethodInvocation, Cloneable {

	//代理对象
	protected final Object proxy;

	//目标对象
	protected final Object target;

	//被调方法
	protected final Method method;

	//被掉方法参数
	protected Object[] arguments;

	//目标对象的Class
	private final Class targetClass;

	private Map<String, Object> userAttributes;

	//Advice列表
	protected final List interceptorsAndDynamicMethodMatchers;

	//Advice是个list链，用于记录执行到第几个Advice的下标
	private int currentInterceptorIndex = -1;


	/**
	 * 构造函数
	 *
	 * @param proxy
	 * 		代理对象
	 * @param target
	 * 		目标对象
	 * @param method
	 * 		被调方法
	 * @param arguments
	 * 		被掉方法参数
	 * @param targetClass
	 * 		目标对象的Class
	 * @param interceptorsAndDynamicMethodMatchers
	 * 		Advice列表
	 */
	protected ReflectiveMethodInvocation(
			Object proxy, Object target, Method method, Object[] arguments,
			Class targetClass, List<Object> interceptorsAndDynamicMethodMatchers) {

		this.proxy = proxy;
		this.target = target;
		this.targetClass = targetClass;
		this.method = BridgeMethodResolver.findBridgedMethod(method);
		this.arguments = arguments;
		this.interceptorsAndDynamicMethodMatchers = interceptorsAndDynamicMethodMatchers;
	}


	public final Object getProxy() {
		return this.proxy;
	}

	public final Object getThis() {
		return this.target;
	}

	public final AccessibleObject getStaticPart() {
		return this.method;
	}

	public final Method getMethod() {
		return this.method;
	}

	public final Object[] getArguments() {
		return (this.arguments != null ? this.arguments : new Object[0]);
	}

	public void setArguments(Object[] arguments) {
		this.arguments = arguments;
	}

    //核心代码
	//执行Advice
    //递归调用Advice
	public Object proceed() throws Throwable {
		if (this.currentInterceptorIndex == this.interceptorsAndDynamicMethodMatchers.size() - 1) {
			return invokeJoinpoint();
		}

		Object interceptorOrInterceptionAdvice =
				this.interceptorsAndDynamicMethodMatchers.get(++this.currentInterceptorIndex);
		if (interceptorOrInterceptionAdvice instanceof InterceptorAndDynamicMethodMatcher) { //动态匹配
			InterceptorAndDynamicMethodMatcher dm =
					(InterceptorAndDynamicMethodMatcher) interceptorOrInterceptionAdvice;
			if (dm.methodMatcher.matches(this.method, this.targetClass, this.arguments)) {
				return dm.interceptor.invoke(this);
			}
			else { //动态匹配失败
				return proceed();
			}
		}
		else {//不是动态匹配
			return ((MethodInterceptor) interceptorOrInterceptionAdvice).invoke(this);
		}
	}
	
	protected Object invokeJoinpoint() throws Throwable {
		return AopUtils.invokeJoinpointUsingReflection(this.target, this.method, this.arguments);
	}

	
	public MethodInvocation invocableClone() {
		Object[] cloneArguments = null;
		if (this.arguments != null) {
			// Build an independent copy of the arguments array.
			cloneArguments = new Object[this.arguments.length];
			System.arraycopy(this.arguments, 0, cloneArguments, 0, this.arguments.length);
		}
		return invocableClone(cloneArguments);
	}
	
	public MethodInvocation invocableClone(Object[] arguments) {
		// Force initialization of the user attributes Map,
		// for having a shared Map reference in the clone.
		if (this.userAttributes == null) {
			this.userAttributes = new HashMap<String, Object>();
		}

		// Create the MethodInvocation clone.
		try {
			ReflectiveMethodInvocation clone = (ReflectiveMethodInvocation) clone();
			clone.arguments = arguments;
			return clone;
		}
		catch (CloneNotSupportedException ex) {
			throw new IllegalStateException(
					"Should be able to clone object of type [" + getClass() + "]: " + ex);
		}
	}


	public void setUserAttribute(String key, Object value) {
		if (value != null) {
			if (this.userAttributes == null) {
				this.userAttributes = new HashMap<String, Object>();
			}
			this.userAttributes.put(key, value);
		}
		else {
			if (this.userAttributes != null) {
				this.userAttributes.remove(key);
			}
		}
	}

	public Object getUserAttribute(String key) {
		return (this.userAttributes != null ? this.userAttributes.get(key) : null);
	}
	
	public Map<String, Object> getUserAttributes() {
		if (this.userAttributes == null) {
			this.userAttributes = new HashMap<String, Object>();
		}
		return this.userAttributes;
	}


	@Override
	public String toString() {
		// Don't do toString on target, it may be proxied.
		StringBuilder sb = new StringBuilder("ReflectiveMethodInvocation: ");
		sb.append(this.method).append("; ");
		if (this.target == null) {
			sb.append("target is null");
		}
		else {
			sb.append("target is of class [").append(this.target.getClass().getName()).append(']');
		}
		return sb.toString();
	}

}