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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 &quot;common.hpp&quot;</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &lt;boost/asio.hpp&gt;</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#if defined(BOOST_ASIO_HAS_CO_AWAIT)</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &lt;boost/asio/experimental/awaitable_operators.hpp&gt;</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="keyword">namespace </span>net = boost::asio;</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="keyword">using namespace </span>net::experimental::awaitable_operators;</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">using </span>resolver = net::use_awaitable_t&lt;&gt;::as_default_on_t&lt;net::ip::tcp::resolver&gt;;</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">using </span>timer_type = net::use_awaitable_t&lt;&gt;::as_default_on_t&lt;net::steady_timer&gt;;</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="keyword">using </span><a class="code hl_class" href="classaedis_1_1resp3_1_1request.html">aedis::resp3::request</a>;</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="keyword">using </span><a class="code hl_function" href="group__high-level-api.html#gac56bb1a8df93445853a4b9dae2d97b6e">aedis::adapt</a>;</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="keyword">using </span><a class="code hl_enumeration" href="group__high-level-api.html#gadcfe42e0996c05d14fe5f8bacce384bc">aedis::operation</a>;</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="keyword">namespace</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span>{</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="keyword">auto</span> redir(boost::system::error_code&amp; ec)</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> { <span class="keywordflow">return</span> net::redirect_error(net::use_awaitable, ec); }</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span>}</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">auto</span> healthy_checker(std::shared_ptr&lt;connection&gt; conn) -&gt; net::awaitable&lt;void&gt;</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span>{</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <span class="keywordflow">try</span> {</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> request req;</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> req.push(<span class="stringliteral">&quot;PING&quot;</span>);</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> timer_type timer{<span class="keyword">co_await</span> net::this_coro::executor};</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="keywordflow">for</span> (boost::system::error_code ec;;) {</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> timer.expires_after(std::chrono::seconds{1});</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">co_await</span> (conn-&gt;async_exec(req, <a class="code hl_function" href="group__high-level-api.html#gac56bb1a8df93445853a4b9dae2d97b6e">adapt</a>()) || timer.async_wait(redir(ec)));</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keywordflow">if</span> (!ec) {</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">co_return</span>;</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> }</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">// Waits some time before trying the next ping.</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> timer.expires_after(std::chrono::seconds{1});</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keyword">co_await</span> timer.async_wait();</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="keywordflow">catch</span> (...) {</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> }</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span>}</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><span class="keyword">auto</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span>connect(</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> std::shared_ptr&lt;connection&gt; conn,</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> std::string <span class="keyword">const</span>&amp; host,</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> std::string <span class="keyword">const</span>&amp; port) -&gt; net::awaitable&lt;void&gt;</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="keyword">auto</span> ex = <span class="keyword">co_await</span> net::this_coro::executor;</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> resolver resv{ex};</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> timer_type timer{ex};</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> boost::system::error_code ec;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> timer.expires_after(std::chrono::seconds{5});</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keyword">auto</span> <span class="keyword">const</span> addrs = <span class="keyword">co_await</span> (resv.async_resolve(host, port) || timer.async_wait(redir(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">throw</span> std::runtime_error(<span class="stringliteral">&quot;Resolve timeout&quot;</span>);</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> timer.expires_after(std::chrono::seconds{5});</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">co_await</span> (net::async_connect(conn-&gt;next_layer(), std::get&lt;0&gt;(addrs)) || timer.async_wait(redir(ec)));</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keywordflow">if</span> (!ec)</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">&quot;Connect timeout&quot;</span>);</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><span class="keyword">auto</span> <a class="code hl_enumvalue" href="group__high-level-api.html#ggadcfe42e0996c05d14fe5f8bacce384bcaa53108f7543b75adbb34afc035d4cdf6">run</a>(net::awaitable&lt;void&gt; op) -&gt; <span class="keywordtype">int</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> <span class="keywordflow">try</span> {</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> net::io_context ioc;</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> net::co_spawn(ioc, std::move(op), [](std::exception_ptr p) {</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keywordflow">if</span> (p)</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> std::rethrow_exception(p);</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> ioc.run();</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> <span class="keywordflow">return</span> 0;</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> } <span class="keywordflow">catch</span> (std::exception <span class="keyword">const</span>&amp; e) {</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> std::cerr &lt;&lt; <span class="stringliteral">&quot;Error: &quot;</span> &lt;&lt; e.what() &lt;&lt; std::endl;</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="keywordflow">return</span> 1;</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> </div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span><span class="preprocessor">#endif </span><span class="comment">// defined(BOOST_ASIO_HAS_CO_AWAIT)</span></div>
<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>
<div class="ttc" id="agroup__high-level-api_html_gac56bb1a8df93445853a4b9dae2d97b6e"><div class="ttname"><a href="group__high-level-api.html#gac56bb1a8df93445853a4b9dae2d97b6e">aedis::adapt</a></div><div class="ttdeci">auto adapt(std::size_t max_read_size=(std::numeric_limits&lt; std::size_t &gt;::max)()) noexcept</div><div class="ttdoc">Creates an adapter that ignores responses.</div><div class="ttdef"><b>Definition:</b> <a href="adapt_8hpp_source.html#l00199">adapt.hpp:199</a></div></div>
<div class="ttc" id="agroup__high-level-api_html_gadcfe42e0996c05d14fe5f8bacce384bc"><div class="ttname"><a href="group__high-level-api.html#gadcfe42e0996c05d14fe5f8bacce384bc">aedis::operation</a></div><div class="ttdeci">operation</div><div class="ttdoc">Connection operations that can be cancelled.</div><div class="ttdef"><b>Definition:</b> <a href="operation_8hpp_source.html#l00018">operation.hpp:18</a></div></div>
<div class="ttc" id="agroup__high-level-api_html_ggadcfe42e0996c05d14fe5f8bacce384bcaa53108f7543b75adbb34afc035d4cdf6"><div class="ttname"><a href="group__high-level-api.html#ggadcfe42e0996c05d14fe5f8bacce384bcaa53108f7543b75adbb34afc035d4cdf6">aedis::operation::run</a></div><div class="ttdeci">@ run</div><div class="ttdoc">Refers to connection::async_run operations.</div></div>
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