②. Feign的基本使用(消费端)
- ①.新建 cloud-consumer-feign-order80
- ②. pom
<!--openfeign--> <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-commons</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>
③.yml
server: port: 80 eureka: client: register-with-eureka: false service-url: defaultZone: http://eureka7001.com:7001/eureka, http://eureka7002.com:7002/eureka
④. 主启动类:@EnableFeignClients
@SpringBootApplication @EnableFeignClients public class OrderFeignMain80 { public static void main(String[] args) { SpringApplication.run(OrderFeignMain80.class,args); } }
⑤. 业务类
@Component @FeignClient(value = "CLOUD-PAYMENT-SERVICE") public interface PaymentFeignService { @GetMapping("/payment/get/{id}") public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id); @GetMapping("/payment/feign/timeout") public String paymentFeignTimeOut(); }
@RestController @RequestMapping("/feignClient") public class OrderFeignController { @Autowired private PaymentFeignService paymentFeignService; @GetMapping("/payment/getPaymentById/{id}") public CommonResult<Payment>getPaymentById(@PathVariable("id") Long id){ return paymentFeignService.getPaymentById(id); } }
⑥. 测试
先启动2个eureka集群7001/7002
再启动2个微服务8001/8002
启动OpenFeign启动
http://localhost/consumer/payment/get/31
Feign自带负载均衡配置项
⑦. 小总结