Welcome back, Sujit Kumar Mishra

What kind of interceptors you have used in Spring to intercept the request and response details of a controller endpoint? 

In Spring, to intercept the request and response details of a controller endpoint, we commonly use two main types of interceptors:

1: HandlerInterceptor

- This is an interface provided by Spring MVC.

- We can create our own class by implementing HandlerInterceptor and override methods like:

• preHandle() – runs before the controller method.
• postHandle() – runs after the controller method but before the response is sent.
• afterCompletion() – runs after the complete request is finished.

- This is useful for logging, authentication, or modifying requests/responses.

2: Filter

- This is a standard Servlet feature, but Spring Boot supports it easily.

- We can create a class that implements javax.servlet.Filter.

- The doFilter() method lets us intercept both the request and response before they reach the controller and after the response leaves the controller.

In summary:

1: Use HandlerInterceptor for Spring-specific interception.

2: Use Filter for more general or lower-level interception.

Both can be used to log, check, or modify request and response details in a Spring application.