com.netflix.hystrix.exception.HystrixBadRequestException Java Examples

@Override
  public Exception decode(String methodKey, Response response) {
if((response.status() >= 200 && response.status() < 300) || 
		response.status()==HttpStatus.BAD_REQUEST.value() ||
		response.status()==HttpStatus.INTERNAL_SERVER_ERROR.value() ){
	try {
		HttpMessageConverterExtractor<SimpleDataResult<Object>> extractor = new HttpMessageConverterExtractor<SimpleDataResult<Object>>(SimpleDataResult.class, this.httpMessageConverters.getConverters());
		SimpleDataResult<Object> result = extractor.extractData(new FeignResponseAdapter(response));
		log.error("method[{}], error code: {}, result: {}", methodKey, response.status(), result);
		//防止普通异常也被熔断,如果不转为 HystrixBadRequestException 并且 fallback 也抛了异常, it will be enabled short-circuited get "Hystrix circuit short-circuited and is OPEN" when client frequently invoke
		if(result!=null){
			return new HystrixBadRequestException(result.getMessage(), new ServiceException(result.getMessage(), result.getCode()));
		}
	} catch (IOException e) {
		throw new BaseException("error feign response : " + e.getMessage(), e);
	}
}

  	Exception exception = defaultDecoder.decode(methodKey, response);
  	return exception;
  }
 

protected Object handleDataResult(FeignResponseAdapter response, Object res) {
	Object result = res;
	if (result instanceof DataResult) {
		DataResult<?> dr = (DataResult<?>) result;
		if(isCutoutError(response, dr)){
			ServiceException cause = new ServiceException(dr.getMessage(), dr.getCode());
			String message = "cutoutError, remote service error:"+dr.getMessage();
			JFishLoggerFactory.findMailLogger().error(message);
			
			throw new HystrixRuntimeException(FailureType.SHORTCIRCUIT, OkHttpRibbonCommand.class, message, cause, null);
		}else if(!dr.isSuccess()){
			throw new HystrixBadRequestException(dr.getMessage(), new ServiceException(dr.getMessage(), dr.getCode()));
		}
		res = dr.getData();
	}
	return result;
}
 

@SuppressWarnings({ "rawtypes" })
	@Deprecated
	protected Object decode2(FeignResponseAdapter response, Type type) throws IOException, FeignException {
		Object res = null;
		try {
			res = decodeByType(response, type);
		} catch (HttpMessageNotReadableException e) {
			//正常解码失败后尝试用SimpleDataResult解码
			response.getBody().reset();
			SimpleDataResult dr = decodeByType(response, SimpleDataResult.class);
			if(dr.isError()){
//				throw new ServiceException(dr.getMessage(), dr.getCode());
				throw new HystrixBadRequestException(dr.getMessage(), new ServiceException(dr.getMessage(), dr.getCode()));
			}
			res = dr.getData();
		}
		return res;
	}
 

/**
 * Decode exception.
 *
 * @param methodKey the method key
 * @param response  the response
 *
 * @return the exception
 */
@Override
public Exception decode(final String methodKey, final Response response) {
	if (response.status() >= HttpStatus.BAD_REQUEST.value() && response.status() < HttpStatus.INTERNAL_SERVER_ERROR.value()) {
		return new HystrixBadRequestException("request exception wrapper");
	}

	ObjectMapper mapper = new ObjectMapper();
	try {
		HashMap map = mapper.readValue(response.body().asInputStream(), HashMap.class);
		Integer code = (Integer) map.get("code");
		String message = (String) map.get("message");
		if (code != null) {
			ErrorCodeEnum anEnum = ErrorCodeEnum.getEnum(code);
			if (anEnum != null) {
				if (anEnum == ErrorCodeEnum.GL99990100) {
					throw new IllegalArgumentException(message);
				} else {
					throw new BusinessException(anEnum);
				}
			} else {
				throw new BusinessException(ErrorCodeEnum.GL99990500, message);
			}
		}
	} catch (IOException e) {
		log.info("Failed to process response body");
	}
	return defaultErrorDecoder.decode(methodKey, response);
}
 

public User findById(Long id) {
    throw new HystrixBadRequestException("business exception happens.", new Exception(""));
}
 

@HystrixCommand(fallbackMethod = "fallback")
public String badRequest() {
    // simulate failed input validation. Fallback won't be executed.
    throw new HystrixBadRequestException("Bla", new IllegalArgumentException("validation failed"));
}