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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/* Copyright (c) 2018-2022 Marcelo Zimbres Silva (mzimbres@gmail.com)</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> *</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> * Distributed under the Boost Software License, Version 1.0. (See</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> * accompanying file LICENSE.txt)</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> */</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include &lt;boost/redis/connection.hpp&gt;</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include &lt;boost/redis/logger.hpp&gt;</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &lt;boost/asio/awaitable.hpp&gt;</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include &lt;boost/asio/use_awaitable.hpp&gt;</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &lt;boost/asio/deferred.hpp&gt;</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &lt;boost/asio/co_spawn.hpp&gt;</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &lt;boost/asio/detached.hpp&gt;</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include &lt;boost/asio/consign.hpp&gt;</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include &lt;boost/asio/redirect_error.hpp&gt;</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include &lt;boost/asio/signal_set.hpp&gt;</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#if defined(BOOST_ASIO_HAS_CO_AWAIT)</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="keyword">namespace </span>net = boost::asio;</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="keyword">using namespace </span>std::chrono_literals;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="keyword">using </span><a class="code hl_class" href="classboost_1_1redis_1_1request.html">boost::redis::request</a>;</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="keyword">using </span><a class="code hl_typedef" href="group__high-level-api.html#gaa1dc751c19aca21d7bd661c8b9eea04f">boost::redis::generic_response</a>;</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="keyword">using </span><a class="code hl_class" href="classboost_1_1redis_1_1logger.html">boost::redis::logger</a>;</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="keyword">using </span><a class="code hl_struct" href="group__high-level-api.html#structboost_1_1redis_1_1config">boost::redis::config</a>;</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="keyword">using </span><a class="code hl_variable" href="group__high-level-api.html#ga67c4e424db0e0ee72bd5a62c2e649470">boost::redis::ignore</a>;</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">using </span>boost::system::error_code;</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="keyword">using </span><a class="code hl_class" href="classboost_1_1redis_1_1connection.html">boost::redis::connection</a>;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="keyword">using </span>signal_set = net::deferred_t::as_default_on_t&lt;net::signal_set&gt;;</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="comment">/* This example will subscribe and read pushes indefinitely.</span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="comment"> *</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="comment"> * To test send messages with redis-cli</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="comment"> *</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="comment"> * $ redis-cli -3</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="comment"> * 127.0.0.1:6379&gt; PUBLISH channel some-message</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="comment"> * (integer) 3</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="comment"> * 127.0.0.1:6379&gt;</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="comment"> *</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="comment"> * To test reconnection try, for example, to close all clients currently</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment"> * connected to the Redis instance</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="comment"> *</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="comment"> * $ redis-cli</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="comment"> * &gt; CLIENT kill TYPE pubsub</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="comment"> */</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="comment">// Receives server pushes.</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="keyword">auto</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span>receiver(std::shared_ptr&lt;connection&gt; conn) -&gt; net::awaitable&lt;void&gt;</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span>{</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> request req;</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> req.push(<span class="stringliteral">&quot;SUBSCRIBE&quot;</span>, <span class="stringliteral">&quot;channel&quot;</span>);</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> </div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="comment">// Loop while reconnection is enabled</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordflow">while</span> (conn-&gt;will_reconnect()) {</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// Reconnect to channels.</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">co_await</span> conn-&gt;<a class="code hl_function" href="classboost_1_1redis_1_1connection.html#a210708e4827faeef49f27861ffb678a1">async_exec</a>(req, <a class="code hl_variable" href="group__high-level-api.html#ga67c4e424db0e0ee72bd5a62c2e649470">ignore</a>, net::deferred);</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> </div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="comment">// Loop reading Redis pushs messages.</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="group__high-level-api.html#gaa1dc751c19aca21d7bd661c8b9eea04f">generic_response</a> resp;;) {</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> error_code ec;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keyword">co_await</span> conn-&gt;async_receive(resp, net::redirect_error(net::use_awaitable, ec));</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">if</span> (ec)</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">break</span>; <span class="comment">// Connection lost, break so we can reconnect to channels.</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> std::cout</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> &lt;&lt; resp.value().at(1).value</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; resp.value().at(2).value</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; resp.value().at(3).value</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> resp.value().clear();</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> }</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> }</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span>}</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span><span class="keyword">auto</span> co_main(config cfg) -&gt; net::awaitable&lt;void&gt;</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span>{</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keyword">auto</span> ex = <span class="keyword">co_await</span> net::this_coro::executor;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">auto</span> conn = std::make_shared&lt;connection&gt;(ex);</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> net::co_spawn(ex, receiver(conn), net::detached);</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> conn-&gt;async_run(cfg, {}, net::consign(net::detached, conn));</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> signal_set sig_set(ex, SIGINT, SIGTERM);</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">co_await</span> sig_set.async_wait();</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> conn-&gt;cancel();</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span>}</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span><span class="preprocessor">#endif </span><span class="comment">// defined(BOOST_ASIO_HAS_CO_AWAIT)</span></div>
<div class="ttc" id="aclassboost_1_1redis_1_1connection_html"><div class="ttname"><a href="classboost_1_1redis_1_1connection.html">boost::redis::connection</a></div><div class="ttdoc">A basic_connection that type erases the executor.</div><div class="ttdef"><b>Definition:</b> <a href="connection_8hpp_source.html#l00308">connection.hpp:308</a></div></div>
<div class="ttc" id="aclassboost_1_1redis_1_1connection_html_a210708e4827faeef49f27861ffb678a1"><div class="ttname"><a href="classboost_1_1redis_1_1connection.html#a210708e4827faeef49f27861ffb678a1">boost::redis::connection::async_exec</a></div><div class="ttdeci">auto async_exec(request const &amp;req, Response &amp;resp, CompletionToken token)</div><div class="ttdoc">Calls boost::redis::basic_connection::async_exec.</div><div class="ttdef"><b>Definition:</b> <a href="connection_8hpp_source.html#l00352">connection.hpp:352</a></div></div>
<div class="ttc" id="aclassboost_1_1redis_1_1logger_html"><div class="ttname"><a href="classboost_1_1redis_1_1logger.html">boost::redis::logger</a></div><div class="ttdoc">Logger class.</div><div class="ttdef"><b>Definition:</b> <a href="logger_8hpp_source.html#l00023">logger.hpp:23</a></div></div>
<div class="ttc" id="aclassboost_1_1redis_1_1request_html"><div class="ttname"><a href="classboost_1_1redis_1_1request.html">boost::redis::request</a></div><div class="ttdoc">Creates Redis requests.</div><div class="ttdef"><b>Definition:</b> <a href="request_8hpp_source.html#l00046">request.hpp:46</a></div></div>
<div class="ttc" id="agroup__high-level-api_html_ga67c4e424db0e0ee72bd5a62c2e649470"><div class="ttname"><a href="group__high-level-api.html#ga67c4e424db0e0ee72bd5a62c2e649470">boost::redis::ignore</a></div><div class="ttdeci">ignore_t ignore</div><div class="ttdoc">Global ignore object.</div></div>
<div class="ttc" id="agroup__high-level-api_html_gaa1dc751c19aca21d7bd661c8b9eea04f"><div class="ttname"><a href="group__high-level-api.html#gaa1dc751c19aca21d7bd661c8b9eea04f">boost::redis::generic_response</a></div><div class="ttdeci">adapter::result&lt; std::vector&lt; resp3::node &gt; &gt; generic_response</div><div class="ttdoc">A generic response to a request.</div><div class="ttdef"><b>Definition:</b> <a href="response_8hpp_source.html#l00033">response.hpp:33</a></div></div>
<div class="ttc" id="agroup__high-level-api_html_structboost_1_1redis_1_1config"><div class="ttname"><a href="group__high-level-api.html#structboost_1_1redis_1_1config">boost::redis::config</a></div><div class="ttdoc">Configure parameters used by the connection classes.</div><div class="ttdef"><b>Definition:</b> <a href="config_8hpp_source.html#l00030">config.hpp:30</a></div></div>
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