Spring-cloud-一步步实现广告系统-10-使用Ribbon-实现微服务调用

在使用 Ribbon 调用广告投放系统 API 之前，我们需要先创建 2 个 VO 对象，AdPlanVO,AdPlanGetRequestVO.

// 数据请求对象
@Data
@NoArgsConstructor
@AllArgsConstructor
public class AdPlanGetRequestVO {
    private Long userId;
    private List<Long> planIds;
}

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//API 请求响应结果反序列化对象
@Data
@AllArgsConstructor
@NoArgsConstructor
public class AdPlanVO {
    private Long planId;
    private Long userId;
    private String planName;
    private Integer planStatus;
    private Date startDate;
    private Date endDate;
    private Date createTime;
    private Date updateTime;
}

在 AdSearchApplication 启动类中，添加 RestTemplate 客户端。

public class AdSearchApplication {
  ...
    /**
     * 注册{@link RestTemplate}Bean
     * @return
     */
    @Bean
    @LoadBalanced // 让 RestTemplate 在调用服务的时候，可以实现负载均衡
    RestTemplate restTemplate(){return new RestTemplate();
    }
}

创建一个 controller，来测试调用广告提供系统的 API

/**
 * SearchController for search information controller
 *
 * @author <a href="mailto:magicianisaac@gmail.com">Isaac.Zhang | 若初 </a>
 */
@RestController
@Slf4j
@RequestMapping(path = "/search")
public class SearchController {
      // 注入 RestTemplate
    private final RestTemplate restTemplate;
    @Autowired
    public SearchController(RestTemplate restTemplate) {this.restTemplate = restTemplate;}

    @GetMapping(path = "/plan/get-ribbon")
    public CommonResponse<List<AdPlanVO>> getAdPlansUseRibbon(@RequestBody AdPlanGetRequestVO requestVO) {log.info("ad-search::getAdPlansUseRibbon -> {}", JSON.toJSONString(requestVO));
        return restTemplate.postForEntity("http://mscx-ad-sponsor/ad-sponsor/plan/get", requestVO, CommonResponse.class).getBody();}

    @GetMapping(path = "/user/get")
    public CommonResponse getUsers(@Param(value = "username") String username) {log.info("ad-search::getUsers -> {}", JSON.toJSONString(username));
        CommonResponse commonResponse = restTemplate.getForObject("http://mscx-ad-sponsor/ad-sponsor/user/get?username={username}", CommonResponse.class, username
        );
        return commonResponse;
    }
}