How can request tracking and processing be organized inside a service using Spring Boot?

In Spring Boot, there are several approaches to track requests and their passage within the service:

1. Filters — implement javax.servlet.Filter or use OncePerRequestFilter to log incoming requests and responses.

2. HandlerInterceptors — allow intercepting requests before and after controller processing.

3. AOP (Aspect-Oriented Programming) — use aspect-oriented programming to log service method calls.

4. Spring Boot Actuator — provides metrics and request tracing.

5. Logging with MDC (Mapped Diagnostic Context) — add a unique request identifier (e.g., requestId) to MDC to link logs from different components.

Example of a filter for logging requests:

@Component
public class LoggingFilter extends OncePerRequestFilter {
    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
        String requestURI = request.getRequestURI();
        System.out.println("Incoming request: " + requestURI);
        filterChain.doFilter(request, response);
        System.out.println("Response status: " + response.getStatus());
    }
}