SpringBoot熔断机制之CircuitBreaker详解

feign:
  hystrix:
    enabled: true

@FeignClient(value = "ribbonserver" , fallback = FeignServerImpl.class )
public interface FeignServer {
    @RequestMapping(value ="/testRealRibbon",method= RequestMethod.GET)
    String testRealRibbon(@RequestParam("content") String content);
}

@Component
public class FeignServerImpl implements FeignServer {
    public String testRealRibbon(@RequestParam("content") String content) {
        return content + ", it's fallback with feign";
    }
}

@FeignClient(value = "ribbonserver" , fallbackFactory = FeignServerFactoryImpl.class )
public interface FeignServer {
    @RequestMapping(value ="/testRealRibbon",method= RequestMethod.GET)
    String testRealRibbon(@RequestParam("content") String content);
}

@Component
public class FeignServerFactoryImpl implements FallbackFactory<FeignServer> {
    /**
     * Returns an instance of the fallback appropriate for the given cause
     *
     * @param cause corresponds to {@link AbstractCommand#getFailedExecutionException()}
     *              often, but not always an instance of {@link FeignException}.
     */
    public FeignServer create(Throwable cause) {
        return new FeignServer() {
            public String testRealRibbon(String content) {
                return content + ", it's fallback Factory with feign";
            }
        };
    }
}

@Controller
public class RibbonController {
    @Autowired
    RestTemplate restTemplate;
    private final static String serverURI = "http://ribbonserver/";
    @RequestMapping("/test")
    @HystrixCommand(fallbackMethod = "testError")
    public String testRibbon(String content) {
        System.out.println(content);
        restTemplate.getForEntity(serverURI+"testRealRibbon?content="+content,String.class);
        return "index";
    }
    public String testError() {
        return "404";
    }
}