测试member和coupon的远程调用

  1. 想要获取当前会员领取到的所有优惠券。先去注册中心找优惠券服务，
  2. 注册中心调一台优惠券服务器给会员，会员服务器发送请求给这台优
  3. 惠券服务器，然后对方响应。
  5. Feign与注册中心
  6. spring cloud feign
  8. 声明式远程调用
  10. feign是一个声明式的HTTP客户端，他的目的就是让远程调用更加简单。
  11. 给远程服务发的是HTTP请求。
  13. 1 会员服务想要远程调用优惠券服务，只需要给会员服务里引入
  14. openfeign依赖，他就有了远程调用其他服务的能力。
  16. <dependency>
  17.     <groupId>org.springframework.cloud</groupId>
  18.     <artifactId>spring-cloud-starter-openfeign</artifactId>
  19. </dependency>
  21. 2 在coupon中修改如下的内容
  22. @RequestMapping("coupon/coupon")
  23. public class CouponController {
  24.     @Autowired
  25.     private CouponService couponService;
  27.     @RequestMapping("/member/list")
  28.     public R membercoupons(){    //全系统的所有返回都返回R
  29.         // 应该去数据库查用户对于的优惠券，但这个我们简化了，不去数据库查了，构造了一个优惠券给他返回
  30.         CouponEntity couponEntity = new CouponEntity();
  31.         couponEntity.setCouponName("满100减10");//优惠券的名字
  32.         return R.ok().put("coupons",Arrays.asList(couponEntity));
  33.     }
  36. 3 这样我们准备好了优惠券的调用内容
  37. 在member的配置类上加注解@EnableFeignClients(basePackages="com.yxj.gulimall.member.feign")，
  38. 告诉spring这里面是一个远程调用客户端，member要调用的接口
  40. package com.yxj.gulimall.member;
  41. import org.mybatis.spring.annotation.MapperScan;
  42. import org.springframework.boot.SpringApplication;
  43. import org.springframework.boot.autoconfigure.SpringBootApplication;
  44. import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
  45. import org.springframework.cloud.openfeign.EnableFeignClients;
  47. @SpringBootApplication
  48. @MapperScan("com.yxj.gulimall.member.dao")
  49. @EnableDiscoveryClient
  50. @EnableFeignClients(basePackages="com.yxj.gulimall.member.feign")
  51. public class GulimallMemberApplication {
  53.     public static void main(String[] args) {
  54.         SpringApplication.run(GulimallMemberApplication.class, args);
  55.     }
  57. }
  59. 4 那么要调用什么东西呢？就是我们刚才写的优惠券的功能，
  60. 复制函数部分，在member的com.yxj.gulimall.member.feign包下新建类：
  61. package com.yxj.gulimall.member.feign;
  63. import com.yxj.common.utils.R;
  64. import org.springframework.cloud.openfeign.FeignClient;
  65. import org.springframework.web.bind.annotation.RequestMapping;
  67. @FeignClient("gulimall-coupon") //告诉spring cloud这个接口是一个远程客户端，要调用coupon服务，再去调用coupon服务/coupon/coupon/member/list对应的方法
  68. public interface CouponFeignService {
  69.     @RequestMapping("/coupon/coupon/member/list") 
  70.     public R membercoupons();//得到一个R对象
  71. }
  73. 5 然后我们在member的控制层写一个测试请求
  74. @RestController
  75. @RequestMapping("member/member")
  76. public class MemberController {
  77.     @Autowired
  78.     private MemberService memberService;
  80.     @Autowired
  81.     CouponFeignService couponFeignService;
  83.     @RequestMapping("/coupons")
  84.     public R test(){
  85.         MemberEntity memberEntity = new MemberEntity();
  86.         memberEntity.setNickname("张三");
  87.         R membercoupons = couponFeignService.membercoupons(); //假设张三去数据库查了后返回了张三的优惠券信息
  89.         // 打印会员和优惠券信息
  90.         return R.ok().put("member",memberEntity).put("coupons",membercoupons.get("coupons"));
  91.     }
  93. 6 重新启动服务
  94. http://localhost:8000/member/member/coupons
  95. {"msg":"success","code":0,"coupons":[{"id":null,"couponType":null,"couponImg":null,"couponName":"满100减10","num":null,"amount":null,"perLimit":null,"minPoint":null,"startTime":null,"endTime":null,"useType":null,"note":null,"publishCount":null,"useCount":null,"receiveCount":null,"enableStartTime":null,"enableEndTime":null,"code":null,"memberLevel":null,"publish":null}],"member":{"id":null,"levelId":null,"username":null,"password":null,"nickname":"张三","mobile":null,"email":null,"header":null,"gender":null,"birth":null,"city":null,"job":null,"sign":null,"sourceType":null,"integration":null,"growth":null,"status":null,"createTime":null}}
  97. 7 上面内容很重要，我们停留5分钟体会一下。
  98. coupon里的R.ok()是什么 # coupon里的控制层就是new了个couponEntity然后放到hashmap（R）里而已。
  99. public class R extends HashMap<String, Object> {
  100.     public static R ok() {
  101.         return new R();
  102.     }
  104.     public R put(String key, Object value) {
  105.         super.put(key, value);
  106.         return this;
  107.     }
  109. }