notes/pl/java/libfws/spring/features/internals/proxy.txt

2024
SpringDeveloper - Long - Spring Tips: Proxies of 27:17
    https://www.youtube.com/watch?v=pvE4pwyzkpE

    static class MyBeanPostProcessor implements BeanPostProcessor {
      @Override
      public Object postProcessAfterInitialization(Object target, String beanName) throws BeansException {
        var proxyInstance = (SomeService) Proxy.newProxyInstance(...classloader,
          new Class[]{defaultCustomer.getClass.getInterfaces()},
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
              var result = method.invoke(defaultCustomer, args);  // call method on an impl, not on a proxy instance itself
              return result;
            }
          }
        var pf = new ProxyFactory();
        pf.setInterfaces(target.getClass().getInterfaces());
        pf.setTarget(target);
        pf.addAdvice(new MethodInterceptor() {
          @Override
          public Object invoke(MethodInvocation invocation) throws Throwable {
            Method method = invocation.getMethod();
            Object[] arguments = invocation.getArguments();
            return method.invoke(target, arguments);
          }
        });
        return pf.getProxy(getClass().getClassLoader());
      }
    }
        
    static class ProxyBeanFactoryInitializationAotProcessor implements BeanFactoryInitializationAotProcessor {
      @Override
      public BeanFactoryInitializationAotContribution processAheadOfTime(ConfigurableListableBeanFactory beanFactory) {
        return new BeanFactoryInitializationAotContribution() {
          @Override
          public void applyTo(GenerationContext generationContext, BeanFactoryInitializationCode beanFactoryInitializationCode) {
            generationContext.getRuntimeHints().proxies()
              .registerJdkProxy(CustomerService.class,
                org.springframework.aop.SpringProxy.class,
                org.springframework.aop.framework.Advised.class,
                org.springframework.core.DecoratingProxy.class
              );
          }
        }
      }
    }

    check classes:
    AdvisedSupport
    DefaultAopProxyFactory
        createAopProxy - returns either JdkDynamicAopProxy or 
        ObjenesisCglibAopProxy - the only way to proxy concrete types
    ProxyCreatorSupport,
    ClassUtils
2023
https://habr.com/ru/articles/750894/