FirstController.java

// Package definition and imports

@Controller
public class LoggingController {

    @GetMapping("/")
    public String readValues(Request request) {
      String cookieValue = readCookieValue(request);
      String headerValue = readHeaderValue(request);

      // Do something with values
    }

    private String readCookieValue(Request request) {
      Cookie[] cookies = request.getCookies();

      if (cookies != null) {
        for (Cookie cookie : cookies) {
          if (cookie.getName().equals("cookieName")) {
            return cookie.getValue();
          }
        }
      }

      return "";
    }

    private String readHeaderValue(Request request) {
      String headerValue = request.getHeader("headerName");

      if (headerValue == null) {
        return "";
      } else {
        return headerValue;
      }
    }

}

SecondController.java

// Package definition and imports

@Controller
public class LoggingController {

    @GetMapping("/")
    public String readValues(
                             @CookieValue(value = "cookieName", defaultValue = "") cookieName,
                             @RequestHeader(value = "headerName", defaultValue = "") headerName
                            ) {
      // Do something with values
    }
}