Spring 源码阅读 72：基于 CGLIB 的 AOP 代理的原理（2）- 拦截器的查找与执行

ObjectoldProxy=null;
booleansetProxyContext=false;
Objecttarget=null;
TargetSourcetargetSource=this.advised.getTargetSource();

if (this.advised.exposeProxy) {
// Make invocation available if necessary.oldProxy=AopContext.setCurrentProxy(proxy);
setProxyContext=true;
}

// Get as late as possible to minimize the time we "own" the target, in case it comes from a pool...target=targetSource.getTarget();
Class<?>targetClass= (target!=null?target.getClass() : null);
List<Object>chain=this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass);

// Check whether we only have one InvokerInterceptor: that is,// no real advice, but just reflective invocation of the target.if (chain.isEmpty() &&Modifier.isPublic(method.getModifiers())) {
// We can skip creating a MethodInvocation: just invoke the target directly.// Note that the final invoker must be an InvokerInterceptor, so we know// it does nothing but a reflective operation on the target, and no hot// swapping or fancy proxying.Object[] argsToUse=AopProxyUtils.adaptArgumentsIfNecessary(method, args);
retVal=methodProxy.invoke(target, argsToUse);
}
else {
// We need to create a method invocation...retVal=newCglibMethodInvocation(proxy, target, method, args, targetClass, chain, methodProxy).proceed();
}

privatestaticclassCglibMethodInvocationextendsReflectiveMethodInvocation {
@NullableprivatefinalMethodProxymethodProxy;
publicCglibMethodInvocation(Objectproxy, @NullableObjecttarget, Methodmethod,
Object[] arguments, @NullableClass<?>targetClass,
List<Object>interceptorsAndDynamicMethodMatchers, MethodProxymethodProxy) {
super(proxy, target, method, arguments, targetClass, interceptorsAndDynamicMethodMatchers);
// Only use method proxy for public methods not derived from java.lang.Objectthis.methodProxy= (Modifier.isPublic(method.getModifiers()) &&method.getDeclaringClass() !=Object.class&&!AopUtils.isEqualsMethod(method) &&!AopUtils.isHashCodeMethod(method) &&!AopUtils.isToStringMethod(method) ?methodProxy : null);
   }
// 省略其他代码}

// org.springframework.aop.framework.CglibAopProxy.CglibMethodInvocation#proceed@Override@NullablepublicObjectproceed() throwsThrowable {
try {
returnsuper.proceed();
   }
catch (RuntimeExceptionex) {
throwex;
   }
catch (Exceptionex) {
if (ReflectionUtils.declaresException(getMethod(), ex.getClass())) {
throwex;
      }
else {
thrownewUndeclaredThrowableException(ex);
      }
   }
}