Handle Security exceptions in Spring Boot Resource Server

Question

How can I get my custom ResponseEntityExceptionHandler or OAuth2ExceptionRenderer to handle Exceptions raised by Spring security on a pure resource ser

Answer 1

public class RestAuthenticationEntryPoint implements AuthenticationEntryPoint {
  @Override
  public void commence(HttpServletRequest request, HttpServletResponse res,
        AuthenticationException authException) throws IOException, ServletException {
      ApiException ex = new ApiException(HttpStatus.FORBIDDEN, "Invalid Token", authException);

      ObjectMapper mapper = new ObjectMapper();
      res.setContentType("application/json;charset=UTF-8");
      res.setStatus(403);
      res.getWriter().write(mapper.writeValueAsString(ex));
  }
}