hystrix服务降级方法使用介绍

  <!--hystrix-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>

  
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value="3000")
    })
    public String paymentInfo_TimeOut(Integer id)
    {
        int second = 5;
        try { TimeUnit.SECONDS.sleep(second); } catch (InterruptedException e) { e.printStackTrace(); }
        return "线程池:"+Thread.currentThread().getName()+"paymentInfo_TimeOut,id: "+id+"\t"+"O(∩_∩)O，耗费秒: "+second;
    }
    public String paymentInfo_TimeOutHandler(Integer id){
        return "/(ㄒoㄒ)/调用支付接口超时或异常：\t"+ "\t当前线程池名字" + Thread.currentThread().getName();
    }

@RestController
@Slf4j
@DefaultProperties(defaultFallback = "payment_Global_FallbackMethod")
public class PaymentHystirxController
{
    @GetMapping("/consumer/payment/hystrix/timeout/{id}")
    @HystrixCommand //加了@DefaultProperties属性注解，并且没有写具体方法名字，就用统一全局的
    public String paymentInfo_TimeOut(@PathVariable("id") Integer id)
    {
        String result = paymentHystrixService.paymentInfo_TimeOut(id);
        return result;
    }
    public String paymentTimeOutFallbackMethod(@PathVariable("id") Integer id)
    {
        return "paymentTimeOutFallbackMethod,对方系统繁忙，请10秒钟后再次尝试/(ㄒoㄒ)/";
    }
    public String payment_Global_FallbackMethod()
    {
        return "Global异常处理信息，请稍后再试，/(ㄒoㄒ)/~~";
    }
}

@Component
@FeignClient(value = "CLOUD-PROVIDER-HYSTRIX-PAYMENT",
fallback = PaymentFallbackService.class)
public interface PaymentHystrixService
{
    @GetMapping("/payment/hystrix/ok/{id}")
    String paymentInfo_OK(@PathVariable("id") Integer id);
    @GetMapping("/payment/hystrix/timeout/{id}")
    String paymentInfo_TimeOut(@PathVariable("id") Integer id);
}

@Component //必须加 //必须加 //必须加
public class PaymentFallbackService implements PaymentHystrixService
{
    @Override
    public String paymentInfo_OK(Integer id) {
        return "服务调用失败，提示来自：cloud-consumer-feign-order80";
    }
    @Override
    public String paymentInfo_TimeOut(Integer id) {
        return "服务调用失败，提示来自：cloud-consumer-feign-order80";
    }
}