boost/redis
2
0
Fork 0
mirror of https://github.com/boostorg/redis.git synced 2026-01-19 04:42:09 +00:00
Code Issues Projects Releases Wiki Activity
Files
gh-pages
redis/cpp20__chat__room_8cpp_source.html
Marcelo Zimbres b795d1571c v1.4.2
2023-08-18 23:22:20 +02:00

213 lines
21 KiB
HTML
Raw Permalink Blame History

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=11"/>
<meta name="generator" content="Doxygen 1.9.4"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>boost_redis: examples/cpp20_chat_room.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtreedata.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/searchdata.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<script type="text/x-mathjax-config">
MathJax.Hub.Config({
extensions: ["tex2jax.js"],
jax: ["input/TeX","output/HTML-CSS"],
});
</script>
<script type="text/javascript" async="async" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
<link href="doxygen-awesome.css" rel="stylesheet" type="text/css"/>
<link href="doxygen-awesome-sidebar-only.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr id="projectrow">
<td id="projectalign">
<div id="projectname">boost_redis<span id="projectnumber">&#160;1.4.2</span>
</div>
<div id="projectbrief">A redis client library</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.9.4 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
var searchBox = new SearchBox("searchBox", "search",'Search','.html');
/* @license-end */
</script>
<script type="text/javascript" src="menudata.js"></script>
<script type="text/javascript" src="menu.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
$(function() {
initMenu('',true,false,'search.php','Search');
$(document).ready(function() { init_search(); });
});
/* @license-end */
</script>
<div id="main-nav"></div>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
<div id="nav-sync" class="sync"></div>
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&amp;dn=expat.txt MIT */
$(document).ready(function(){initNavTree('cpp20__chat__room_8cpp_source.html',''); initResizable(); });
/* @license-end */
</script>
<div id="doc-content">
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>
<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0"
name="MSearchResults" id="MSearchResults">
</iframe>
</div>
<div class="header">
<div class="headertitle"><div class="title">cpp20_chat_room.cpp</div></div>
</div><!--header-->
<div class="contents">
<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/asio/deferred.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/signal_set.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/co_spawn.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/detached.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/redirect_error.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/posix/stream_descriptor.hpp&gt;</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include &lt;unistd.h&gt;</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#if defined(BOOST_ASIO_HAS_CO_AWAIT)</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#if defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="keyword">namespace </span>net = boost::asio;</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="keyword">using </span>stream_descriptor = net::deferred_t::as_default_on_t&lt;net::posix::stream_descriptor&gt;;</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</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="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_struct" href="group__high-level-api.html#structboost_1_1redis_1_1config">boost::redis::config</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_class" href="classboost_1_1redis_1_1connection.html">boost::redis::connection</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>net::redirect_error;</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="keyword">using </span>net::use_awaitable;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="keyword">using </span>boost::system::error_code;</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="keyword">using namespace </span>std::chrono_literals;</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="comment">// Chat over Redis pubsub. To test, run this program from multiple</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="comment">// terminals and type messages to stdin.</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="keyword">auto</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span>receiver(std::shared_ptr&lt;connection&gt; conn) -&gt; net::awaitable&lt;void&gt;</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span>{</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> request req;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> req.push(<span class="stringliteral">&quot;SUBSCRIBE&quot;</span>, <span class="stringliteral">&quot;channel&quot;</span>);</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">while</span> (conn-&gt;will_reconnect()) {</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// Subscribe to channels.</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">co_await</span> conn-&gt;async_exec(req, <a class="code hl_variable" href="group__high-level-api.html#ga67c4e424db0e0ee72bd5a62c2e649470">ignore</a>, net::deferred);</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// Loop reading Redis push messages.</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</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="l00049" name="l00049"></a><span class="lineno"> 49</span> error_code ec;</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">co_await</span> conn-&gt;async_receive(resp, redirect_error(use_awaitable, ec));</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">if</span> (ec)</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</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="l00053" name="l00053"></a><span class="lineno"> 53</span> std::cout</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> &lt;&lt; resp.value().at(1).value</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; resp.value().at(2).value</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; resp.value().at(3).value</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> resp.value().clear();</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> }</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>}</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span><span class="comment">// Publishes stdin messages to a Redis channel.</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span><span class="keyword">auto</span> publisher(std::shared_ptr&lt;stream_descriptor&gt; in, std::shared_ptr&lt;connection&gt; conn) -&gt; net::awaitable&lt;void&gt;</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span>{</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">for</span> (std::string msg;;) {</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keyword">auto</span> n = <span class="keyword">co_await</span> net::async_read_until(*in, net::dynamic_buffer(msg, 1024), <span class="stringliteral">&quot;\n&quot;</span>);</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> request req;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> req.push(<span class="stringliteral">&quot;PUBLISH&quot;</span>, <span class="stringliteral">&quot;channel&quot;</span>, msg);</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">co_await</span> conn-&gt;async_exec(req, <a class="code hl_variable" href="group__high-level-api.html#ga67c4e424db0e0ee72bd5a62c2e649470">ignore</a>, net::deferred);</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> msg.erase(0, n);</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> }</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><span class="comment">// Called from the main function (see main.cpp)</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span><span class="keyword">auto</span> co_main(config cfg) -&gt; net::awaitable&lt;void&gt;</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span>{</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">auto</span> ex = <span class="keyword">co_await</span> net::this_coro::executor;</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keyword">auto</span> conn = std::make_shared&lt;connection&gt;(ex);</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">auto</span> stream = std::make_shared&lt;stream_descriptor&gt;(ex, ::dup(STDIN_FILENO));</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> net::co_spawn(ex, receiver(conn), net::detached);</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> net::co_spawn(ex, publisher(stream, conn), net::detached);</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> conn-&gt;async_run(cfg, {}, net::consign(net::detached, conn));</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> signal_set sig_set{ex, SIGINT, SIGTERM};</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keyword">co_await</span> sig_set.async_wait();</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> conn-&gt;cancel();</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> stream-&gt;cancel();</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span>}</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span><span class="preprocessor">#else </span><span class="comment">// defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span><span class="keyword">auto</span> co_main(config <span class="keyword">const</span>&amp;) -&gt; net::awaitable&lt;void&gt;</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span>{</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Requires support for posix streams.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">co_return</span>;</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span>}</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span><span class="preprocessor">#endif </span><span class="comment">// defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR)</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</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_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>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
<ul>
<li class="navelem"><a class="el" href="dir_d28a4824dc47e487b107a5db32ef43c4.html">examples</a></li><li class="navelem"><b>cpp20_chat_room.cpp</b></li>
<li class="footer">Generated on Fri Aug 18 2023 23:21:52 for boost_redis by <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.4 </li>
</ul>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink