open-feign远程调用服务
1、引入open-feign依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
2、编写一个接口,告诉springcloud这个接口需要调用远程接口 申明接口的每一个方法都是调用哪个远程服务的那个请求 说明: ①、“cfgmall-coupon"为提供者注册到注册中心的服务名称 ②、 @RequestMapping(”/coupon/coupon/member/list") public R membercoupons(); 为提供服务的方法的完整签名
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* 这是一个声明式的远程调用
*/
@FeignClient("cfgmall-coupon")
public interface CouponFeignService {
@RequestMapping("/coupon/coupon/member/list")
public R membercoupons();
}
3、开启远程调用功能
/**
* 1、想要远程调用别的服务
* 1)、引入open-feign
* 2)、编写一个接口,告诉SpringCloud这个接口需要调用远程服务
* 1、声明接口的每一个方法都是调用哪个远程服务的那个请求
* 3)、开启远程调用功能 (basePackages = "com.cfg.cfgmall.member.feign") 为接口包
*/
@EnableFeignClients(basePackages = "com.cfg.cfgmall.member.feign")
@EnableDiscoveryClient
@SpringBootApplication
public class CfgmallMemberApplication {
public static void main(String[] args) {
SpringApplication.run(CfgmallMemberApplication.class, args);
}
}
4、调用
/**
* 会员
*
*/
@RestController
@RequestMapping("member/member")
public class MemberController {
@Autowired
CouponFeignService couponFeignService;
@RequestMapping("/coupons")
public R test(){
MemberEntity memberEntity = new MemberEntity();
memberEntity.setNickname("张三");
R membercoupons = couponFeignService.membercoupons();
return R.ok().put("member",memberEntity).put("coupons",membercoupons.get("coupons"));
}
}
5、服务提供方
/**
* 优惠券信息
*/
@RefreshScope
@RestController
@RequestMapping("coupon/coupon")
public class CouponController {
@Autowired
private CouponService couponService;
@RequestMapping("/member/list")
public R membercoupons(){
CouponEntity couponEntity = new CouponEntity();
couponEntity.setCouponName("满100减10");
return R.ok().put("coupons",Arrays.asList(couponEntity));
}
}
