I was reading folowing lines and I did not understand clearly.
Springs own bean postprocessors
The Spring framework itself uses several implementations of BeanPostProcessor
under the covers. For example, ApplicationContextAwareProcessor is a Bean-
PostProcessor that sets the application context on beans that implement the
ApplicationContextAware interface. You do not need to register
ApplicationContextAwareProcessor yourself. It is preregistered by the application
Learn how to automatically apply aspects to application beans
using DefaultAdvisorAutoProxyCreator, which is a BeanPostProcessor that creates
AOP proxies based on all candidate advisors in the container.
Any ideas, resources,sample code,links, highly appreciated. thanks in advance.