Api Client

ApiAccessException.java

@Getter
public class ApiAccessException extends RuntimeException {

    private String status;
    private String message;

    public ApiAccessException(String message) {
        super(message);
    }

    public ApiAccessException(String status, String message, Throwable cause) {
        super(message, cause);
        this.message = message;
        this.status = status;
    }
}

JsonUtil.java

public class JsonUtil {
    public static  <T> T fromJson(String json, Class<T> tClass) {
        try {
            return new ObjectMapper().readValue(json, tClass);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

RestClient.java

@Slf4j
public class RestClient {
    public <T> T get(String url, Class<T> tClass) {
        try {
            log.info("request: url {}", url);
            ResponseEntity<T> response =
                    new RestTemplate().getForEntity(url, tClass);
            log.info("response={}", response.getBody().toString());
            return response.getBody();

        } catch (HttpClientErrorException e) {
            ErrorResponse errorResponse =
                    JsonUtil.fromJson(e.getResponseBodyAsString(),
                            ErrorResponse.class);
            log.info("Client error: {}", errorResponse.toString(), e);
            ApiAccessException ex
                    = new ApiAccessException(
                    errorResponse.getStatus(),
                    "Api Request Failed: " + errorResponse.getMessage(),
                    e);
            throw ex;
        } catch (HttpServerErrorException e) {
            log.info("Server error", e);
            throw e;

        } catch (ResourceAccessException e) {
            log.info("Server Down", e);
            throw new ServiceUnavailableException("Service is unavailable", e);
        }
    }
}