springcloud学习笔记-OpenFeign服务接口调用

创建客户端端口为801 依赖：

<dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${
          
   project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

yml：

server:
  port: 80
eureka:
  client:
    register-with-eureka: false
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka, http://eureka7002.com:7002/eureka

controller层：

@RestController
@Slf4j
public class OrderFeignController {
          
   

    @Resource
    private PaymentFeignService paymentFeignService;

     @GetMapping(value = "/consumer/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id")Long id){
          
   

            return  paymentFeignService.getPaymentById(id);
     }
    @GetMapping("/consumer/payment/feign/timeout")
    public String paymentFeignTimeout(){
          
   
            return paymentFeignService.paymentFeignTimeout();

    };

}

定义接口：

@Component
@FeignClient(value = "CLOUD-PAYMENT-SERVICE")//体现了负载均衡
public interface PaymentFeignService {
          
   

    @GetMapping(value = "/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id);

    @GetMapping("/payment/feign/timeout")
    public String paymentFeignTimeout();

}

通过@FeignClient(value = “CLOUD-PAYMENT-SERVICE”) 找到服务器名为：CLOUD-PAYMENT-SERVICE的8001,8002端口的两个服务器

主启动类：

@SpringBootApplication
@EnableFeignClients
public class OrderFeignMain801 {
          
   
    public static void main(String[] args) {
          
   
        SpringApplication.run(OrderFeignMain801.class,args);    }
}

最后启动eureka7001,eureka7002集群，启动服务端8001,8002，启动该客户端801。 访问：http://localhost/consumer/payment/get/31 查看feign自带的负载均衡效果。