@Required & how a BeanPostProcessor works| Dependency Injection | Spring Tutorial |Ch1|E14|

in this session we talk about spring bean post processors and the way that they act on beans. we talk about how for example spring built in bean post processors add the capability of @Autowired annotation and so forth. we also address one of spring deprecated annotations which is @Required and show how we could enable it by adding it's beanpostprocessor. we also show how we could write our own bean post processor for adding capabilities to spring framework