callback_t&amp; acknowledgement_callback);</div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;</div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;  std::string m_redis_server;</div><div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;  std::size_t m_redis_port = 0;</div><div class="line"><a name="l003