async_multi_set

异步写多条数据

    ///
    /// \brief asynchronous multi_set (guarantee atomicity)
    ///     store multiple k-v of the same hashkey to the cluster.
    ///     will not be blocked, return immediately.
    /// \param hashkey
    /// used to decide which partition to put this k-v
    /// \param kvs
    /// all <sortkey,value> pairs to be set. should not be empty
    /// \param callback
    /// the callback function will be invoked after operation finished or error occurred.
    /// \param timeout_milliseconds
    /// if wait longer than this value, will return time out error
    /// \param ttl_seconds
    /// time to live of this value, if expired, will return not found; 0 means no ttl
    /// \return
    /// void.
    ///
    virtual void async_multi_set(const std::string &hashkey,
                                 const std::map<std::string, std::string> &kvs,
                                 async_multi_set_callback_t &&callback = nullptr,
                                 int timeout_milliseconds = 5000,
                                 int ttl_seconds = 0) = 0;