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<td valign="middle" style="color: #FFFFFF" nowrap="nowrap"><font size="6">Aedis 0.1.0</font>   <br> Low level Redis client library </td>
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<li class="navelem"><a class="el" href="dir_d28a4824dc47e487b107a5db32ef43c4.html">examples</a></li><li class="navelem"><a class="el" href="dir_cec695b911ca3e60c472a4dd39f5437b.html">high_level</a></li> </ul>
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<div class="title">echo_server.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) 2019 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"> * This Source Code Form is subject to the terms of the Mozilla Public</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * License, v. 2.0. If a copy of the MPL was not distributed with this</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * file, You can obtain one at https://mozilla.org/MPL/2.0/.</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  </div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <iostream></span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <queue></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <vector></span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <string></span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <boost/asio/signal_set.hpp></span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  </div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <aedis/aedis.hpp></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <aedis/src.hpp></span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "user_session.hpp"</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>net = boost::asio;</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="group__any.html#structaedis_1_1resp3_1_1node">aedis::resp3::node</a>;</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using</span> <a class="code" href="group__any.html#ga1e40a9e5ab61e7980b4be74bf0d4943d">aedis::adapter::adapt</a>;</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">using</span> <a class="code" href="group__any.html#ga9661fea349313723a8ec955975184c0c">aedis::redis::command</a>;</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">using</span> <a class="code" href="classaedis_1_1generic_1_1client.html">aedis::generic::client</a>;</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">using</span> aedis::user_session;</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">using</span> aedis::user_session_base;</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">using</span> <a class="code" href="classaedis_1_1generic_1_1client.html">client_type</a> = <a class="code" href="classaedis_1_1generic_1_1client.html">client<net::ip::tcp::socket, command></a>;</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">using</span> response_type = std::vector<node<std::string>>;</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">using</span> adapter_type = aedis::adapter::adapter_t<response_type>;</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">class </span>myreceiver {</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  myreceiver()</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  : adapter_{<a class="code" href="group__any.html#ga1e40a9e5ab61e7980b4be74bf0d4943d">adapt</a>(resp_)}</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  {}</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>  <span class="keywordtype">void</span> on_resp3(<a class="code" href="group__any.html#ga9661fea349313723a8ec955975184c0c">command</a> cmd, <a class="code" href="group__any.html#structaedis_1_1resp3_1_1node">node<boost::string_view></a> <span class="keyword">const</span>& nd, boost::system::error_code& ec)</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>  adapter_(nd, ec);</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>  </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordtype">void</span> on_write(std::size_t n)</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  { </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  std::cout << <span class="stringliteral">"Number of bytes written: "</span> << n << std::endl;</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">void</span> on_push() { }</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  </div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordtype">void</span> on_read(<a class="code" href="group__any.html#ga9661fea349313723a8ec955975184c0c">command</a> cmd)</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  {</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">switch</span> (cmd) {</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">case</span> command::ping:</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  sessions_.front()->deliver(resp_.front().value);</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  sessions_.pop();</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">case</span> command::incr:</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  std::cout << <span class="stringliteral">"Echos so far: "</span> << resp_.front().value << std::endl;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">default</span>: <span class="comment">/* Ignore */</span>;</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</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>  resp_.clear();</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  }</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>  <span class="keywordtype">void</span> add_user_session(std::shared_ptr<user_session_base> session)</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  { sessions_.push(session); }</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  response_type resp_;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  adapter_type adapter_;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  std::queue<std::shared_ptr<user_session_base>> sessions_;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> };</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> net::awaitable<void></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> listener(</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  std::shared_ptr<net::ip::tcp::acceptor> acc,</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  std::shared_ptr<client_type> db,</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  std::shared_ptr<myreceiver> recv)</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> {</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">for</span> (;;) {</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">auto</span> socket = co_await acc->async_accept(net::use_awaitable);</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">auto</span> session = std::make_shared<user_session>(std::move(socket));</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">auto</span> on_user_msg = [db, recv, session](std::string <span class="keyword">const</span>& msg)</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  {</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  db->send(command::ping, msg);</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  db->send(command::incr, <span class="stringliteral">"echo-counter"</span>);</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  recv->add_user_session(session);</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  };</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  </div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  session->start(on_user_msg);</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> }</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keywordtype">int</span> main()</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> {</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">try</span> {</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  net::io_context ioc;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  </div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">auto</span> db = std::make_shared<client_type>(ioc.get_executor());</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keyword">auto</span> recv = std::make_shared<myreceiver>();</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  db->async_run(</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  *recv,</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  {net::ip::make_address(<span class="stringliteral">"127.0.0.1"</span>), 6379},</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  [](<span class="keyword">auto</span> ec){ std::cout << ec.message() << std::endl;});</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  </div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keyword">auto</span> endpoint = net::ip::tcp::endpoint{net::ip::tcp::v4(), 55555};</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">auto</span> acc = std::make_shared<net::ip::tcp::acceptor>(ioc.get_executor(), endpoint);</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  co_spawn(ioc, listener(acc, db, recv), net::detached);</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  </div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  net::signal_set signals(ioc.get_executor(), SIGINT, SIGTERM);</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  signals.async_wait([&] (<span class="keyword">auto</span>, <span class="keywordtype">int</span>) { ioc.stop(); });</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  ioc.run();</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  } <span class="keywordflow">catch</span> (std::exception <span class="keyword">const</span>& e) {</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  std::cerr << e.what() << std::endl;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  }</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> }</div>
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<div class="ttc" id="aclassaedis_1_1generic_1_1client_html"><div class="ttname"><a href="classaedis_1_1generic_1_1client.html">aedis::generic::client</a></div><div class="ttdoc">A high level Redis client.</div><div class="ttdef"><b>Definition:</b> <a href="client_8hpp_source.html#l00040">client.hpp:40</a></div></div>
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<div class="ttc" id="agroup__any_html_ga1e40a9e5ab61e7980b4be74bf0d4943d"><div class="ttname"><a href="group__any.html#ga1e40a9e5ab61e7980b4be74bf0d4943d">aedis::adapter::adapt</a></div><div class="ttdeci">auto adapt() noexcept</div><div class="ttdoc">Creates a void response adapter.</div><div class="ttdef"><b>Definition:</b> <a href="adapt_8hpp_source.html#l00029">adapt.hpp:29</a></div></div>
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<div class="ttc" id="agroup__any_html_ga9661fea349313723a8ec955975184c0c"><div class="ttname"><a href="group__any.html#ga9661fea349313723a8ec955975184c0c">aedis::redis::command</a></div><div class="ttdeci">command</div><div class="ttdoc">Redis commands.</div><div class="ttdef"><b>Definition:</b> <a href="redis_2command_8hpp_source.html#l00024">command.hpp:24</a></div></div>
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<div class="ttc" id="agroup__any_html_structaedis_1_1resp3_1_1node"><div class="ttname"><a href="group__any.html#structaedis_1_1resp3_1_1node">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#l00035">node.hpp:35</a></div></div>
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