How to use MDC of logback and SLF4J with spring boot to capture unique tracking in the POST request json?

Question

We are using:

• Spring Boot
• Slf4J
• Logback
• ELK stack

Now we want to use MDC to add the unique tracking num

Answer 1

Sorry, don't have enough rep to write comment. This is more correct, fully working code, based on @glytching answer:

@Component
public class MDCFilter extends OncePerRequestFilter {

    @Autowired
    private TrackingnumberGenerator trackGen;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        MDC.put("trackingNumber", trackGen.getTrackingNumber());
        try {
            filterChain.doFilter(request, response);
        } finally {
            MDC.remove("trackingNumber");
        }
    }
}