springcloud以類降級

項目架構

memberService中代碼

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

public interface MemberService {
    @RequestMapping(value = "testMember",method = RequestMethod.GET)
     public String testMember();
    @RequestMapping(value = "test",method = RequestMethod.GET)
    public String test();

orderService中代碼

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

public interface OrderService {

    @RequestMapping(value = "testOrder",method = RequestMethod.GET)
    public String testOrder();
}

order

    項目結構圖

fallBack中代碼

    注意：該類實現的接口是feign中的接口

@Component
public class MemberFallBack implements MemberFeign {

    @Override
    public String testMember() {

        return "服務降級";
    }
    @Override
    public String test(){

        return "服務降級";
    }

MemberFeign中的代碼

import com.bdqn.fallBack.MemberFallBack;
import com.bdqn.service.MemberService;
import org.springframework.cloud.openfeign.FeignClient;

@FeignClient(name = "member",fallback = MemberFallBack.class)
public interface MemberFeign extends MemberService {
}

orderService

@RestController
public class OrderService  {
    @Autowired
    private MemberFeign memberFeign;
    @RequestMapping("test")
    public String test(){
            return memberFeign.testMember();
        }

OrderStar

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

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

    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }

application.yml配置文件

###服務啓動端口號
server:
  port: 8000
###服務名稱(服務註冊到eureka名稱)
spring:
  application:
    name: order
###服務註冊到eureka地址
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8100/eureka


    ###由於該應用爲註冊中心，不會註冊本身
    register-with-eureka: true
    ###是否須要從eureka上獲取註冊信息
    fetch-registry: true

###開啓Hystrix斷路器
feign:
  hystrix:
    enabled: true


##### hystrix禁止服務超時時間
#hystrix:
# command:
#   default:
#      execution:
#       timeout:
#        enabled: false
#

member

    

MemberServiceIpml

import com.bdqn.service.MemberService;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MemberServiceIpml implements MemberService {
    @RequestMapping(value = "testMember",method = RequestMethod.GET)
    public String testMember() {
        try {
            Thread.sleep(1500);
        }catch (Exception e){}
        return "會員接口";
    }

    @Override
    public String test() {
            try {
            Thread.sleep(1500);
        }catch (Exception e){}
        return "會員接口";
    }
}

MemberStar

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

    }
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

application.yml

###服務啓動端口號
server:
  port: 8001
###服務名稱(服務註冊到eureka名稱)
spring:
  application:
    name: member
###服務註冊到eureka地址
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8100/eureka


    ###由於該應用爲註冊中心，不會註冊本身
    register-with-eureka: true
    ###是否須要從eureka上獲取註冊信息
    fetch-registry: true
###開啓Hystrix斷路器
feign:
  hystrix:
    enabled: true