async_del

异步删除单条数据

  1.     ///
  2.     /// \brief asynchronous del
  3.     ///     del stored k-v by key from cluster
  4.     ///     key is composed of hashkey and sortkey. must provide both to get the value.
  5.     ///     will not be blocked, return immediately.
  6.     /// \param hashkey
  7.     /// used to decide from which partition to del this k-v
  8.     /// \param sortkey
  9.     /// all the k-v under hashkey will be sorted by sortkey.
  10.     /// \param callback
  11.     /// the callback function will be invoked after operation finished or error occurred.
  12.     /// \param timeout_milliseconds
  13.     /// if wait longer than this value, will return time out error
  14.     /// \return
  15.     /// void.
  16.     ///
  17.     virtual void async_del(const std::string &hashkey,
  18.                            const std::string &sortkey,
  19.                            async_del_callback_t &&callback = nullptr,
  20.                            int timeout_milliseconds = 5000) = 0;