01-eureka-server

01-serice-feign

Spring Cloud Feign是基于Netflix feign实现，整合了Spring Cloud Ribbon和Spring Cloud Hystrix

pom.xml

	<parent>
		<groupId>com.sky</groupId>
		<artifactId>chapter1</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>
	<artifactId>chapter3-serice-feign</artifactId>
	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-openfeign</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>

application.yml

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
server:
  port: 8765
spring:
  application:
    name: service-feign
feign.hystrix.enabled: true

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

	@Autowired
	ServiceHi serviceHi;

	@GetMapping(value = "/hi")
	public String sayHi(@RequestParam String name) {
		return serviceHi.sayHiFromClientOne(name);
	}
}

@FeignClient(value = "service-hi", fallback = ServiceHiHystric.class)
public interface ServiceHi {

	@RequestMapping(value = "/hi", method = RequestMethod.GET)
	String sayHiFromClientOne(@RequestParam(value = "name") String name);
}

@Component
public class ServiceHiHystric implements ServiceHi {

	@Override
	public String sayHiFromClientOne(String name) {
		return "hi," + name + ",sorry,error!";
	}

}

测试1

先启动chapter1-eureka-server
再启动chapter1-service-hi（端口8762）修改端口后再启动一次（8763）
再启动serice-feign（8765）
访问：http://localhost:8761/
看看eureka的服务注册情况
在这里插入图片描述
访问：http://ip:8765/hi?name=hello
交替访问8762和8763端口