springcloud feign集成hystrix

偏执的太偏执、 2023-07-03 04:35 16阅读 0赞

本章介绍feign集成hystrix  
1、增加pom依赖\`

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

2、启动类中增加注解@EnableHystrix

3、增加feign接口fallback以及相关配置

DemoService

@ConditionalOnProperty(name = "app.host.abcurl")
    @FeignClient(value = "demo-service", url = "${app.host.abcurl}" ,fallback = DemoServiceFallbackImpl .class)
    public interface DemoService {
    
        @GetMapping("/v1/api/getCateData")
        ApiResponse<Page<Object>> getCateData(@RequestParam Map<String,String> params);
    
        @GetMapping("/v1/api/getProductData")
        ApiResponse<Page<Detail>> getProductData(@RequestParam Map<String,String> params);
    }

DemoServiceFallbackImpl

@Slf4j
    @Component
    public class DemoServiceFallbackImpl implements DemoService {
    
        @Override
        public ApiResponse<Page<Object>> getCateData (Map<String, String> params) {
            log.warn("DemoServiceFallbackImpl getCateData fail");
            return null;
        }
    
        @Override
        public ApiResponse<Page<Detail>> getProductData(Map<String, String> params) {
            log.warn("DemoServiceFallbackImpl getProductData fail");
            return null;
        }
    }

3、增加yml相关配置

feign:
      httpclient:
        enabled: true
      hystrix:
        enabled: true
    hystrix:
      command:
        default:
          execution:
            timeout:
              enabled: true
            isolation:
              thread:
                timeoutInMilliseconds: 1000 //该配置需要比ribbon超时时间长
          circuitBreaker:
            requestVolumeThreshold: 1000
      threadpool:
        default:
          coreSize: 60
          maxQueueSize: 200
          queueSizeRejectionThreshold: 200
    
    ribbon:
      ReadTimeout: 500
      ConnectTimeout: 500
      ExecTimeout: 500
      MaxAutoRetries: 1 //最好设置超时重试

这里如果需要查看hystrix监控，可以集成Hystrix Dashboard，详情参考  
https://blog.csdn.net/u013408188/article/details/100074111

下图是我集成grafana 、prometheus的监控图  
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