(五)spring cloud Feign 轉發請求頭(header參數)

 1. 實現Feign提供的一個接口RequestInterceptor

@Configuration
public class FeignConfiguration implements RequestInterceptor{
    private final Logger logger = LoggerFactory.getLogger(getClass());
 
            @Override
            public void apply(RequestTemplate template) {
                ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
                        .getRequestAttributes();
                HttpServletRequest request = attributes.getRequest();
                Enumeration<String> headerNames = request.getHeaderNames();
                if (headerNames != null) {
                    while (headerNames.hasMoreElements()) {
                        String name = headerNames.nextElement();
                        String values = request.getHeader(name);
                        template.header(name, values);
 
                    }
                    logger.info("feign interceptor header:{}",template);
                }
            }
        }

 2.在@FeignClient註解裏面的屬性加上configuration = FeignConfiguration.class就可以了

@FeignClient(name = "aa.com",  configuration = FeignConfiguration.class)
public interface TESt{
}

3.yml文件配置

hystrix:
  command:
    default:
      execution:
        isolation:
          strategy: SEMAPHORE