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<td valign="middle" style="color: #FFFFFF" nowrap="nowrap"><font size="6">Aedis 1.0.0</font>   <br> High level Redis client </td>
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<li class="navelem"><a class="el" href="dir_d28a4824dc47e487b107a5db32ef43c4.html">examples</a></li> </ul>
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<div class="title">subscriber_sync.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Distributed under the Boost Software License, Version 1.0. (See</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * accompanying file LICENSE.txt)</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <tuple></span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <string></span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <thread></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <boost/asio.hpp></span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <aedis.hpp></span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "print.hpp"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// Include this in no more than one .cpp file.</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <aedis/src.hpp></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>net = boost::asio;</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">using</span> <a class="code" href="group__any.html#ga80578c88398587d09fecc7c38fbf42ad">aedis::adapt</a>;</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">using</span> <a class="code" href="structaedis_1_1resp3_1_1node.html">aedis::resp3::node</a>;</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">using</span> <a class="code" href="classaedis_1_1resp3_1_1request.html">aedis::resp3::request</a>;</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">using</span> <a class="code" href="classaedis_1_1connection.html">connection</a> = <a class="code" href="classaedis_1_1sync.html">aedis::sync<aedis::connection<></a>>;</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using</span> <span class="keyword">event</span> = <a class="code" href="classaedis_1_1connection.html#a33c7f3484cebc96ef3050407daded0c9">connection::event</a>;</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// See subscriber.cpp for more info about how to run this example.</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// Subscribe again everytime there is a disconnection.</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keywordtype">void</span> event_receiver(<a class="code" href="classaedis_1_1connection.html">connection</a>& conn)</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <a class="code" href="classaedis_1_1resp3_1_1request.html">request</a> req;</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  req.<a class="code" href="classaedis_1_1resp3_1_1request.html#ae9cfe90ea55427d5345846f80b70be1b">push</a>(<span class="stringliteral">"SUBSCRIBE"</span>, <span class="stringliteral">"channel"</span>);</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  </div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">for</span> (;;) {</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">auto</span> ev = conn.receive_event();</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordflow">if</span> (ev == <a class="code" href="classaedis_1_1connection.html#a33c7f3484cebc96ef3050407daded0c9a5d41402abc4b2a76b9719d911017c592">connection::event::hello</a>)</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  conn.exec(req);</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  }</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> }</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  </div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keywordtype">int</span> main()</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> {</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">try</span> {</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  net::io_context ioc{1};</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">auto</span> work = net::make_work_guard(ioc);</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <a class="code" href="classaedis_1_1connection.html#structaedis_1_1connection_1_1config">connection::config</a> cfg;</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  cfg.<a class="code" href="classaedis_1_1connection.html#a9cb4e6e583a2841732454d2d7654c196">enable_events</a> = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  cfg.<a class="code" href="classaedis_1_1connection.html#aa61c1ba655fbc0c36736ac72201621fa">enable_reconnect</a> = <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <a class="code" href="classaedis_1_1connection.html">connection</a> conn{work.<a class="code" href="classaedis_1_1connection.html#af6a215c0d8a24d1e3466aed1a8801e91">get_executor</a>(), cfg};</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  std::thread t1{[&]() { ioc.run(); }};</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  std::thread t2{[&]() { boost::system::error_code ec; conn.run(ec); }};</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  std::thread t3{[&]() { event_receiver(conn); }};</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">for</span> (std::vector<<a class="code" href="structaedis_1_1resp3_1_1node.html">node<std::string></a>> resp;;) {</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  conn.receive_push(<a class="code" href="group__any.html#ga80578c88398587d09fecc7c38fbf42ad">adapt</a>(resp));</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  print_push(resp);</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  resp.clear();</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  }</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  t1.join();</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  t2.join();</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  t3.join();</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  </div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  } <span class="keywordflow">catch</span> (std::exception <span class="keyword">const</span>& e) {</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  std::cerr << e.what() << std::endl;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> }</div>
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<div class="ttc" id="aclassaedis_1_1connection_html"><div class="ttname"><a href="classaedis_1_1connection.html">aedis::connection</a></div><div class="ttdoc">A high level connection to Redis.</div><div class="ttdef"><b>Definition:</b> <a href="connection_8hpp_source.html#l00045">connection.hpp:45</a></div></div>
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<div class="ttc" id="aclassaedis_1_1connection_html_a33c7f3484cebc96ef3050407daded0c9"><div class="ttname"><a href="classaedis_1_1connection.html#a33c7f3484cebc96ef3050407daded0c9">aedis::connection::event</a></div><div class="ttdeci">event</div><div class="ttdoc">Events that are communicated by connection::async_receive_event.</div><div class="ttdef"><b>Definition:</b> <a href="connection_8hpp_source.html#l00094">connection.hpp:94</a></div></div>
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<div class="ttc" id="aclassaedis_1_1connection_html_a33c7f3484cebc96ef3050407daded0c9a5d41402abc4b2a76b9719d911017c592"><div class="ttname"><a href="classaedis_1_1connection.html#a33c7f3484cebc96ef3050407daded0c9a5d41402abc4b2a76b9719d911017c592">aedis::connection::event::hello</a></div><div class="ttdeci">@ hello</div><div class="ttdoc">Success sending AUTH and HELLO.</div></div>
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<div class="ttc" id="aclassaedis_1_1connection_html_a9cb4e6e583a2841732454d2d7654c196"><div class="ttname"><a href="classaedis_1_1connection.html#a9cb4e6e583a2841732454d2d7654c196">aedis::connection::config::enable_events</a></div><div class="ttdeci">bool enable_events</div><div class="ttdoc">Enable internal events, see connection::async_receive_event.</div><div class="ttdef"><b>Definition:</b> <a href="connection_8hpp_source.html#l00087">connection.hpp:87</a></div></div>
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<div class="ttc" id="aclassaedis_1_1connection_html_aa61c1ba655fbc0c36736ac72201621fa"><div class="ttname"><a href="classaedis_1_1connection.html#aa61c1ba655fbc0c36736ac72201621fa">aedis::connection::config::enable_reconnect</a></div><div class="ttdeci">bool enable_reconnect</div><div class="ttdoc">Enable automatic reconnection (see also config::reconnect_interval).</div><div class="ttdef"><b>Definition:</b> <a href="connection_8hpp_source.html#l00090">connection.hpp:90</a></div></div>
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<div class="ttc" id="aclassaedis_1_1connection_html_af6a215c0d8a24d1e3466aed1a8801e91"><div class="ttname"><a href="classaedis_1_1connection.html#af6a215c0d8a24d1e3466aed1a8801e91">aedis::connection::get_executor</a></div><div class="ttdeci">auto get_executor()</div><div class="ttdoc">Returns the executor.</div><div class="ttdef"><b>Definition:</b> <a href="connection_8hpp_source.html#l00151">connection.hpp:151</a></div></div>
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<div class="ttc" id="aclassaedis_1_1connection_html_structaedis_1_1connection_1_1config"><div class="ttname"><a href="classaedis_1_1connection.html#structaedis_1_1connection_1_1config">aedis::connection::config</a></div><div class="ttdoc">Connection configuration parameters.</div><div class="ttdef"><b>Definition:</b> <a href="connection_8hpp_source.html#l00055">connection.hpp:55</a></div></div>
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<div class="ttc" id="aclassaedis_1_1resp3_1_1request_html"><div class="ttname"><a href="classaedis_1_1resp3_1_1request.html">aedis::resp3::request</a></div><div class="ttdoc">Creates Redis requests.</div><div class="ttdef"><b>Definition:</b> <a href="request_8hpp_source.html#l00172">request.hpp:172</a></div></div>
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<div class="ttc" id="aclassaedis_1_1resp3_1_1request_html_ae9cfe90ea55427d5345846f80b70be1b"><div class="ttname"><a href="classaedis_1_1resp3_1_1request.html#ae9cfe90ea55427d5345846f80b70be1b">aedis::resp3::request::push</a></div><div class="ttdeci">void push(boost::string_view cmd, Ts const &... args)</div><div class="ttdoc">Appends a new command to the end of the request.</div><div class="ttdef"><b>Definition:</b> <a href="request_8hpp_source.html#l00203">request.hpp:203</a></div></div>
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<div class="ttc" id="aclassaedis_1_1sync_html"><div class="ttname"><a href="classaedis_1_1sync.html">aedis::sync</a></div><div class="ttdoc">A high level synchronous connection to Redis.</div><div class="ttdef"><b>Definition:</b> <a href="sync_8hpp_source.html#l00024">sync.hpp:24</a></div></div>
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<div class="ttc" id="agroup__any_html_ga80578c88398587d09fecc7c38fbf42ad"><div class="ttname"><a href="group__any.html#ga80578c88398587d09fecc7c38fbf42ad">aedis::adapt</a></div><div class="ttdeci">auto adapt() noexcept</div><div class="ttdoc">Creates an adapter that ignores responses.</div><div class="ttdef"><b>Definition:</b> <a href="adapt_8hpp_source.html#l00140">adapt.hpp:140</a></div></div>
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<div class="ttc" id="astructaedis_1_1resp3_1_1node_html"><div class="ttname"><a href="structaedis_1_1resp3_1_1node.html">aedis::resp3::node</a></div><div class="ttdoc">A node in the response tree.</div><div class="ttdef"><b>Definition:</b> <a href="node_8hpp_source.html#l00028">node.hpp:28</a></div></div>
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