aspect注解源码分析加载与生效

获取当前类中除Pointcut注解的方法外的所有方法getAdvisorMethods(Class<?> aspectClass)

注解生效

org.springframework.aop.framework.AdvisedSupport#getInterceptorsAndDynamicInterceptionAdvice查找增强器

当找到有@aspect注解类时获取增强器 this.advisorFactory.getAdvisors(factory)

org.springframework.aop.aspectj.annotation.AspectJAdvisorFactory#getAdvice此方法进行生成advice根据不同注解

org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator#getAdvicesAndAdvisorsForBean此步调用的是查看是否有切面类

after->AspectJAfterAdvice

走默认方法反射

是

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory#applyBeanPostProcessorsAfterInitialization如果确实存在切面增强器，则会创建代理类

org.springframework.aop.framework.CglibAopProxy.DynamicAdvisedInterceptor#intercept

org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator#shouldSkip

第二步

有

@Override 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() || Proxy.isProxyClass(targetClass)) {    return new JdkDynamicAopProxy(config);   }   return new ObjenesisCglibAopProxy(config);  }  else {   return new JdkDynamicAopProxy(config);  } }

第二步：this.aspectJAdvisorsBuilder.buildAspectJAdvisors()从bean工厂中找到所有带有@aspect注解的类

走各自的代理逻辑proceed方法，也就是会走我们的切面方法

第一步：super.findCandidateAdvisors()从bean工厂中找到所有Advisor的实现类

Around->AspectJAroundAdvice

hasInstantiationAwareBeanPostProcessors()由于EnableAspectJAutoProxy引入了AnnotationAwareAspectJAutoProxyCreator

org.springframework.aop.framework.JdkDynamicAopProxy#invoke

第一步

无

org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator#postProcessAfterInitialization调用后置处理器

以增强器为集合为value，key为当前类名放入缓存

org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory#getPointcut获取注解表达式

new InstantiationModelAwarePointcutAdvisorImpl返回实例

关键代码

org.springframework.aop.framework.ProxyFactory#getProxy

org.springframework.aop.aspectj.annotation.InstantiationModelAwarePointcutAdvisorImpl#instantiateAdvice

org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator#createProxy走代理类创建并返回bean，不走docreateBean方法了

否

org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator#postProcessBeforeInstantiation调用bean实例化前后置处理器

jdk代理类

直接返回，继续走创建bean的其他流程

org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory#getAdvisor获取注解

afterreturn->AspectJAfterReturningAdvice

org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator#wrapIfNecessarywrapIfNecessary方法调用

cglib代理类

before->AspectJMethodBeforeAdvice

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory#resolveBeforeInstantiation

afterthrow->AspectJAfterThrowingAdvice

org.springframework.aop.framework.DefaultAopProxyFactory#createAopProxy

走其他创建bena流程

createBean创建任意bean

org.springframework.aop.framework.ProxyCreatorSupport#createAopProxy

aspect加载