语雀绘制UML时序图

@startuml
autonumber
actor "用户" as User
participant "用户模块" as UserService
participant "订单模块" as OrderService
activate User
  alt 订单创建步骤
    User -> UserService:发起创建订单请求
    alt 用户相关处理
      UserService -> UserService:获取用户信息
      UserService -> UserService:校验用户信息
      UserService -> OrderService:开始创建订单
    end
    alt 订单相关处理
      OrderService -> OrderService:订单校验
      OrderService -> OrderService:锁定订单【redis进行锁定，key:order-lock:xxx】
      OrderService -> OrderService:发送订单创建mq消息
      UserService  <- OrderService:返回创建结果
    end
    User <- UserService:包装信息并返回
  end
@enduml