springcloud feign集成hystrix

本章介绍feign集成hystrix 1、增加pom依赖`

1		<dependency>
2			<groupid>org.springframework.cloud</groupid>
3			<artifactid>spring-cloud-starter-netflix-hystrix</artifactid>
4		</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

1@ConditionalOnProperty(name = "app.host.abcurl")
2@FeignClient(value = "demo-service", url = "${app.host.abcurl}" ,fallback = DemoServiceFallbackImpl .class)
3public interface DemoService {
4
5    @GetMapping("/v1/api/getCateData")
6    ApiResponse<page<object>&gt; getCateData(@RequestParam Map<string,string> params);
7
8    @GetMapping("/v1/api/getProductData")
9    ApiResponse<page<detail>&gt; getProductData(@RequestParam Map<string,string> params);
10}

DemoServiceFallbackImpl

1@Slf4j
2@Component
3public class DemoServiceFallbackImpl implements DemoService {
4
5    @Override
6    public ApiResponse<page<object>&gt; getCateData (Map<string, string> params) {
7        log.warn("DemoServiceFallbackImpl getCateData fail");
8        return null;
9    }
10
11    @Override
12    public ApiResponse<page<detail>&gt; getProductData(Map<string, string> params) {
13        log.warn("DemoServiceFallbackImpl getProductData fail");
14        return null;
15    }
16}

3、增加yml相关配置

1feign:
2  httpclient:
3    enabled: true
4  hystrix:
5    enabled: true
6hystrix:
7  command:
8    default:
9      execution:
10        timeout:
11          enabled: true
12        isolation:
13          thread:
14            timeoutInMilliseconds: 1000 //该配置需要比ribbon超时时间长
15      circuitBreaker:
16        requestVolumeThreshold: 1000
17  threadpool:
18    default:
19      coreSize: 60
20      maxQueueSize: 200
21      queueSizeRejectionThreshold: 200
22
23ribbon:
24  ReadTimeout: 500
25  ConnectTimeout: 500
26  ExecTimeout: 500
27  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 </string,></page<detail></string,></page<object></string,string></page<detail></string,string></page<object>