server:port: 8765
spring:application:name: feign-provider
eureka:instance:lease-renewal-interval-in-seconds: 5lease-expiration-duration-in-seconds: 15client:healthcheck:enabled: trueservice-url:defaultZone: http://admin:123@localhost:8761/eureka/
feign:hystrix:enabled: true
hystrix:command:default:execution:timeout:enabled: trueisolation:thread:timeoutInMilliseconds: 1000

<dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><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.cloud</groupId><artifactId>spring-cloud-starter-netflix-ribbon</artifactId><version>2.0.0.RELEASE</version></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-hystrix</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency></dependencies>

package com.transsion;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
public class FeignProviderApplication {public static void main(String[] args) {SpringApplication.run(FeignProviderApplication.class, args);}}

package com.transsion;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;@RestController
public class TestController {@AutowiredTestService testService;@RequestMapping(value = "/test", method = RequestMethod.GET)public String helloConsumer() {//调用了绑定PROVIDER服务接口的客户端向服务发起/test接口的调用return testService.test();}}

package com.transsion;import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
//@FeignClient("PROVIDER"):绑定注册的服务：其中value为注册服务的applicationName,fallbac为熔断器的配置
@FeignClient(name = "PROVIDER",fallback = FallbackTest.class)
public interface TestService {//绑定具体服务的REST接口@RequestMapping("/test")String test();
}

package com.transsion;import org.springframework.stereotype.Component;//从@HystrixCommand(fallbackMethod）中的回调方法转换成回调类
@Component
public class FallbackTest implements TestService{@Overridepublic String test() {return "fallback";}
}