springCloud 微服务之间通过feign调用接口

假设现在有个订单服务(my-order)和用户服务(my-user),订单服务需要调用户服务下UserInforController的一个获取用户信息接口 /user-info/list,该接口请求方式为get

实现步骤：

1、首先在订单服务模块下创建一个 FeignClient interface

@FeignClient(contextId = "myUserInfoResource",name = "my-user",path = "/user-info/list")
public interface MyUserInfoFeign {

    @RequestMapping("/list")
    @ApiOperation(value = "游戏道具数据查询",notes = "游戏道具数据查询",httpMethod = "GET")
    ResultData<List<UserInfo>> list(@RequestParam(name = "userId") String userId);
}

2、在订单服务模块下创建一个FeignService

@Service
@Slf4j
public class MyUserInfoFeignService {

    @Resource
    private MyUserInfoFeign  myUserInfoFeign; 

  @Async 
  public CompletableFuture<List<UserInfo>> getUserInfoList(String userId){ 

  long startTime = System.currentTimeMillis(); 
  ResultData<List<UserInfo>> userList=myUserInfoFeign.list(userId);

  if(userList.getCode() != 200){ 

      throw new MyException(500 , "my-user服务不可用"); 
  } 
  log.info("异步执行远程调用耗时：{}毫秒" , System.currentTimeMillis() - startTime); 

  return AsyncResult.forValue(userList.getData()).completable();

 } 
}

3、通过调FeignService获取结果

@Resource
private  MyUserInfoFeignService myUserInfoFeignService ;

public List<UserInfo> list( String userId){
        List<UserInfo> userList=null;
        CompletableFuture<List<UserInfo>> userinfoFutrue=myUserInfoFeignService .getUserInfoList(userId); 
    try { 
    userList=userinfoFutrue.get(); 

    }catch (Exception e){
    e.printStackTrace(); 
    }
    return ResultData.success(userList); 
}