场景

SpringCloud中集成Hystrix实现服务降级(从实例入手)：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/124948025

上面在进行降级配置的fallback时是通过如下方式配置

    @GetMapping("/consumer/payment/hystrix/timeout/{id}")
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = { @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value="2000")
    })
    public String paymentInfo_TimeOut(Integer id)
    {
        //int age = 10/0;
        String result = paymentHystrixService.paymentInfo_TimeOut(id);
        return result;
    }
    public String paymentInfo_TimeOutHandler(Integer id)
    {
        return "线程池:  "+Thread.currentThread().getName()+"来自消费者88的提示：服务提供者繁忙或者运行报错，请稍后再试,id:  "+id+"\t"+"o(╥﹏╥)o";
    }

但是这样就需要在每个方法中重复添加注解并配置fallback方法。

有没有可以通配的方式进行配置fallback。

注：

博客：
https://blog.csdn.net/badao_liumang_qizhi
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实现

1、首先确保yml中如下配置已经打开

feign:
  hystrix:
    enabled: true

2、然后新建一个类实现上面的Service接口，统一为接口里面的方法进行异常处理

package com.badao.springclouddemo.service;

import org.springframework.stereotype.Component;


@Component
public class PaymentFallbackService implements PaymentHystrixService
{
    @Override
    public String paymentInfo_OK(Integer id)
    {
        return "-----PaymentFallbackService fall back-paymentInfo_OK ,o(╥﹏╥)o";
    }

    @Override
    public String paymentInfo_TimeOut(Integer id)
    {
        return "-----PaymentFallbackService fall back-paymentInfo_TimeOut ,o(╥﹏╥)o";
    }
}

3、给service接口中@FeignClinet注解中配置fallback属性为上面的实现类

package com.badao.springclouddemo.service;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

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

    @GetMapping("/payment/hystrix/timeout/{id}")
    public String paymentInfo_TimeOut(@PathVariable("id") Integer id);


}