SpringCloud教程之服务消费者(feign + hystrix)（六）

落日映苍穹つ 2023-02-12 14:27 9阅读 0赞

## SpringCloud服务消费者feign + hystrix ##

在父工程目录下创建一个maven项目，在这个maven项目中添加依赖

<dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot</artifactId>
            </dependency>
        </dependencies>

在配置文件application.yml中添加以下配置

eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:7010/eureka/
    server:
      port: 11111
    spring:
      application:
        name: feign-service

启动类

@SpringBootApplication
    @EnableEurekaClient
    @EnableDiscoveryClient
    @EnableFeignClients
    public class FeignApplication {
        public static void main(String[] args) {
            SpringApplication.run( FeignApplication.class, args );
        }
    }

Web层

@RestController
    public class TestController {
        @Autowired
        FeignApi feignApi;
    
        @GetMapping("/hi")
        public String hi(@RequestParam String name){
            return feignApi.hi(name);
        }
    }

feign接口

@FeignClient(name = "server02",fallbackFactory = FeignRemoteHystrix.class)
    public interface FeignApi {
        @GetMapping("/hi")
        String hi(@RequestParam String name);
    }

熔断类

@Component
    public class FeignRemoteHystrix implements FeignApi {
        @Override
        public String hi(String name) {
            return name+"： 熔断";
        }
    }

依次启动Eureka、config-server、再启动本服务

在浏览器上访问[http://localhost:11111/hi?name=按时][http_localhost_11111_hi_name] ， 返回服务提供者的返回值

关闭服务提供者，返回 按时: 熔断

[http_localhost_11111_hi_name]: http://localhost:11111/hi?name='%20rel=