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<div id="projectname">Aedis<span id="projectnumber"> 1.4.1</span>
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<div id="projectbrief">A redis client library</div>
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<div class="headertitle"><div class="title">cpp20_low_level_async.cpp</div></div>
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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>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> *</span></div>
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<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>
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<div class="line"><a id="l00004" 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 id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> */</span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> </div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include <boost/asio.hpp></span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#if defined(BOOST_ASIO_HAS_CO_AWAIT)</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include <aedis.hpp></span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include <string></span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include <iostream></span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="keyword">namespace </span>net = boost::asio;</div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="keyword">namespace </span>resp3 = aedis::resp3;</div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="keyword">using </span>resolver = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::resolver>;</div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">using </span>tcp_socket = net::use_awaitable_t<>::as_default_on_t<net::ip::tcp::socket>;</div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">using </span><a class="code hl_function" href="group__low-level-api.html#ga49a01c937e62d5f9916a0c60c4abbc1c">aedis::adapter::adapt2</a>;</div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="keyword">using </span>net::ip::tcp;</div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="keyword">auto</span> co_main(std::string host, std::string port) -> net::awaitable<void></div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span>{</div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">auto</span> ex = <span class="keyword">co_await</span> net::this_coro::executor;</div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> resolver resv{ex};</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">auto</span> <span class="keyword">const</span> addrs = <span class="keyword">co_await</span> resv.async_resolve(host, port);</div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> tcp_socket socket{ex};</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">co_await</span> net::async_connect(socket, addrs);</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="comment">// Creates the request and writes to the socket.</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <a class="code hl_class" href="classaedis_1_1resp3_1_1request.html">resp3::request</a> req;</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> req.<a class="code hl_function" href="classaedis_1_1resp3_1_1request.html#a1a7b7e58ed214bcd962d20b65ed35eca">push</a>(<span class="stringliteral">"HELLO"</span>, 3);</div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> req.<a class="code hl_function" href="classaedis_1_1resp3_1_1request.html#a1a7b7e58ed214bcd962d20b65ed35eca">push</a>(<span class="stringliteral">"PING"</span>, <span class="stringliteral">"Hello world"</span>);</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> req.<a class="code hl_function" href="classaedis_1_1resp3_1_1request.html#a1a7b7e58ed214bcd962d20b65ed35eca">push</a>(<span class="stringliteral">"QUIT"</span>);</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">co_await</span> <a class="code hl_function" href="group__low-level-api.html#ga54dda2974f233dd25a2eaf20ce9b5385">resp3::async_write</a>(socket, req);</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> </div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// Responses</span></div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> std::string buffer, resp;</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// Reads the responses to all commands in the request.</span></div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">auto</span> dbuffer = net::dynamic_buffer(buffer);</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">co_await</span> <a class="code hl_function" href="group__low-level-api.html#ga8a0d6c76b5faeeaa5ee5e2e4770cd181">resp3::async_read</a>(socket, dbuffer);</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">co_await</span> <a class="code hl_function" href="group__low-level-api.html#ga8a0d6c76b5faeeaa5ee5e2e4770cd181">resp3::async_read</a>(socket, dbuffer, <a class="code hl_function" href="group__low-level-api.html#ga49a01c937e62d5f9916a0c60c4abbc1c">adapt2</a>(resp));</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">co_await</span> <a class="code hl_function" href="group__low-level-api.html#ga8a0d6c76b5faeeaa5ee5e2e4770cd181">resp3::async_read</a>(socket, dbuffer);</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> </div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> std::cout << <span class="stringliteral">"Ping: "</span> << resp << std::endl;</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span>}</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> </div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="preprocessor">#endif </span><span class="comment">// defined(BOOST_ASIO_HAS_CO_AWAIT)</span></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#l00169">request.hpp:169</a></div></div>
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<div class="ttc" id="aclassaedis_1_1resp3_1_1request_html_a1a7b7e58ed214bcd962d20b65ed35eca"><div class="ttname"><a href="classaedis_1_1resp3_1_1request.html#a1a7b7e58ed214bcd962d20b65ed35eca">aedis::resp3::request::push</a></div><div class="ttdeci">void push(std::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#l00261">request.hpp:261</a></div></div>
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<div class="ttc" id="agroup__low-level-api_html_ga49a01c937e62d5f9916a0c60c4abbc1c"><div class="ttname"><a href="group__low-level-api.html#ga49a01c937e62d5f9916a0c60c4abbc1c">aedis::adapter::adapt2</a></div><div class="ttdeci">auto adapt2() noexcept</div><div class="ttdoc">Creates a dummy response adapter.</div><div class="ttdef"><b>Definition:</b> <a href="adapter_2adapt_8hpp_source.html#l00040">adapt.hpp:40</a></div></div>
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<div class="ttc" id="agroup__low-level-api_html_ga54dda2974f233dd25a2eaf20ce9b5385"><div class="ttname"><a href="group__low-level-api.html#ga54dda2974f233dd25a2eaf20ce9b5385">aedis::resp3::async_write</a></div><div class="ttdeci">auto async_write(AsyncWriteStream &stream, Request const &req, CompletionToken &&token=boost::asio::default_completion_token_t< typename AsyncWriteStream::executor_type >{})</div><div class="ttdoc">Writes a request asynchronously.</div><div class="ttdef"><b>Definition:</b> <a href="write_8hpp_source.html#l00053">write.hpp:53</a></div></div>
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<div class="ttc" id="agroup__low-level-api_html_ga8a0d6c76b5faeeaa5ee5e2e4770cd181"><div class="ttname"><a href="group__low-level-api.html#ga8a0d6c76b5faeeaa5ee5e2e4770cd181">aedis::resp3::async_read</a></div><div class="ttdeci">auto async_read(AsyncReadStream &stream, DynamicBuffer buffer, ResponseAdapter adapter=ResponseAdapter{}, CompletionToken &&token=boost::asio::default_completion_token_t< typename AsyncReadStream::executor_type >{})</div><div class="ttdoc">Reads a complete response to a Redis command asynchronously.</div><div class="ttdef"><b>Definition:</b> <a href="read_8hpp_source.html#l00169">read.hpp:169</a></div></div>
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<li class="navelem"><a class="el" href="dir_d28a4824dc47e487b107a5db32ef43c4.html">examples</a></li><li class="navelem"><b>cpp20_low_level_async.cpp</b></li>
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