SpringMVC HandlerExceptionResolver Arayüzü - Yeni Sayfaya Yönlendirir

Giriş

Şu satırı dahil ederiz

import org.springframework.web.servlet.HandlerExceptionResolver;

Exception döndürmek için 3 yöntem var

- @ControllerAdvice + @ExceptionHandler : Global Exception handling yapar

- HandlerExceptionResolver

- ResponseStatusException

Bu sınıf direkt ResponseStatusException fırlatmaktan daha iyi, çünkü merkezi bir noktadan Exception'lar kontrol edilebilir. Bu sınıf yerine @ControllerAdvice veya @ExceptionHandler kullanılabilir.

Filtrelerden Kullanmak

Şöyle yaparız

public class AuthorizationFilter extends BasicAuthenticationFilter {
  private final HandlerExceptionResolver exceptionResolver;

  public AuthorizationFilter(AuthenticationManager authenticationManager, 
                             HandlerExceptionResolver exceptionResolver) {
    super(authenticationManager);
    this.exceptionResolver = exceptionResolver;
  }

  @Override
  protected void doFilterInternal(HttpServletRequest request, 
                                  HttpServletResponse response, 
                                  FilterChain chain)
            throws IOException, ServletException {
    try {
    ...
     } catch (ExpiredJwtException e) {
       exceptionResolver.resolveException(request, response, null, e);
    }
  }
}

Örnek

Şöyle yaparız

@Component
class RestResponseStatusExceptionResolver implements HandlerExceptionResolver {

  @Override
  public ModelAndView resolveException(HttpServletRequest request, 
                                       HttpServletResponse response, 
                                       Object object, 
                                       Exception exception) {
    ModelAndView model = new ModelAndView();
    model.setView(new MappingJackson2JsonView());
    model.addObject("exception", exception.getMessage());
    return model;
  }
}

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

  @Override
  public void configureHandlerExceptionResolvers(
    List<HandlerExceptionResolver> resolvers) {
    
    resolvers.add(0, new RestResponseStatusExceptionResolver());
  }
}

HTTP cevabı şöyledir

{
  "serviceDownTimeException": {
    "cause": null,
    "stackTrace": [],
    "localizedMessage": "1-2 AM is service downtime!",
    "message": "1-2 AM is service downtime!",
    "suppressed": []
  }
}