Spring Cloud ——OpenFeign

介绍：

声明式服务调用与负载均衡组件

pom.xml

        
            org.springframework.cloud
            spring-cloud-starter-openfeign
        

application.yml

spring:
  application:
    name: cloud-order-service
eureka:
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka
ribbon:
  #指的是建立连接所用时间，适用于网络正常情况下，两端连接的情况
  ReadTimeout: 5000
  #指的是建立连接后从服务器读取到可用资源的时间
  ConnectTimeout: 5000
logging:
  level:
    com.pxx.cloud.service.PaymentServiceFeign: debug
feign.client.config.default.loggerLevel: full

注：也可通过配置类的方式使用

@Configuration
public class FeignConfig {
    @Bean
    Logger.Level feignLoggerLevel(){
        return Logger.Level.DEBUG;
    }
}

service

//接口加注解
@FeignClient("CLOUD-PAYMENT-SERVICE")
@Component
public interface PaymentServiceFeign {

    @GetMapping("/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") long id);
}

controller

@RestController
@Slf4j
public class OrderFeignController {

    @Resource
    private PaymentServiceFeign paymentServiceFeign;

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") long id){
        return  paymentServiceFeign.getPaymentById(id);
    }
}