达到效果:
- 调用外部rest接口,而不是通过服务名调用;
- 实现Hystrix效果;
以调用云片接口为例,完整示例代码:
@FeignClient(name = "yunpian", url = "https://sms.yunpian.com/v2", fallback = YunpianClient.YunpianFallback.class, fallbackFactory = YunpianClient.YunpianFallbackFactory.class) public interface YunpianClient { @RequestMapping(value = "/sms/single_send.json", method = RequestMethod.POST, headers = {"Accept=application/json;charset=utf-8;", "Content-Type=application/x-www-form-urlencoded;charset=utf-8;"}) Object singleSend(@RequestParam("apikey") String apikey, @RequestParam("text") String text, @RequestParam("mobile") String mobile); @Component class YunpianFallback extends BaseClient implements YunpianClient{ @Override public Object singleSend(String apikey, String text, String mobile) { logger.error("调用异常,进入fallback ...,参数:{}, {}, {}", apikey, text, mobile); return "YunpianFallback ...."; } } @Component class YunpianFallbackFactory extends BaseClient implements FallbackFactory<YunpianClient> { @Override public YunpianClient create(Throwable throwable) { return new YunpianClient() { @Override public Object singleSend(@RequestParam("apikey") String apikey, @RequestParam("text") String text, @RequestParam("mobile") String mobile) { logger.error("调用异常,FallbackFactory ...,参数:{}, {}, {}", apikey, text, mobile); return "FallbackFactory ...."; } }; } } }
利用@FeignClient可很方便调用外部rest接口,并实现Hystrix效果。
但在上面代码中,只有fallback生效,fallbackFactory并不会被执行,看效果fallback 和 fallbackFactory只需配置一个即可。