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startGettingOfUpdatesByLongPolling
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<h1 id="long-polling">Long polling<a class="headerlink" href="#long-polling" title="Permanent link">&para;</a></h1>
<p>Long polling is a technology of getting updates for cases you do not have some dedicated server or you have no opportunity to receive updates via <a href="webhooks.html">webhooks</a>. More about this you can read in <a href="https://en.wikipedia.org/wiki/Push_technology#Long_polling">wiki</a>.</p>
<h2 id="related-topics">Related topics<a class="headerlink" href="#related-topics" title="Permanent link">&para;</a></h2>
<ul>
<li><a href="updates-filters.html">Updates filters</a></li>
</ul>
<h2 id="long-polling-in-this-library">Long polling in this library<a class="headerlink" href="#long-polling-in-this-library" title="Permanent link">&para;</a></h2>
<p>There are a lot of ways to include work with long polling:</p>
<ul>
<li><code>RequestsExecutor#longPollingFlow</code> Is the base way to get all updates cold Flow. Remember, that <strong>this flow will not be launched automatically</strong><ul>
<li><code>RequestsExecutor#startGettingOfUpdatesByLongPolling</code> Old and almost deprecated way</li>
<li><code>RequestsExecutor#longPolling</code> Works like <code>startGettingOfUpdatesByLongPolling</code> but shorted in a name :)</li>
</ul>
</li>
<li><code>RequestsExecutor#createAccumulatedUpdatesRetrieverFlow</code> Works like <code>longPollingFlow</code>, but flow inside will return only the updates accumulated at the moment of calls (all new updates will not be passed throw this flow)<ul>
<li><code>RequestsExecutor#retrieveAccumulatedUpdates</code> Use <code>createAccumulatedUpdatesRetrieverFlow</code> to perform all accumulated updates</li>
<li><code>RequestsExecutor#flushAccumulatedUpdates</code> Works like <code>retrieveAccumulatedUpdates</code> but perform all updates directly in a place of calling</li>
</ul>
</li>
<li>By yourself with <code>GetUpdates</code> request or <code>RequestsExecutor#getUpdates</code> extension</li>
</ul>
<h3 id="longpolling">longPolling<a class="headerlink" href="#longpolling" title="Permanent link">&para;</a></h3>
<p><code>longPolling</code> is a simple way to start getting updates and work with bot:</p>
<div class="language-kotlin highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="kd">val</span><span class="w"> </span><span class="nv">bot</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">telegramBot</span><span class="p">(</span><span class="n">token</span><span class="p">)</span>
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="n">bot</span><span class="p">.</span><span class="na">longPolling</span><span class="p">(</span>
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="w"> </span><span class="n">textMessages</span><span class="p">().</span><span class="na">subscribe</span><span class="p">(</span><span class="n">scope</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="c1">// here &quot;scope&quot; is a CoroutineScope</span>
</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a><span class="w"> </span><span class="n">println</span><span class="p">(</span><span class="nb">it</span><span class="p">)</span><span class="w"> </span><span class="c1">// will be printed each update from chats with messages</span>
</span><span id="__span-0-5"><a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a><span class="w"> </span><span class="p">}</span>
</span><span id="__span-0-6"><a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a><span class="p">)</span>
</span></code></pre></div>
<h3 id="startgettingofupdatesbylongpolling">startGettingOfUpdatesByLongPolling<a class="headerlink" href="#startgettingofupdatesbylongpolling" title="Permanent link">&para;</a></h3>
<p>The main aim of <code>startGettingOfUpdatesByLongPolling</code> extension was to provide more simple way to get updates in automatic mode:</p>
<div class="language-kotlin highlight"><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="kd">val</span><span class="w"> </span><span class="nv">bot</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">telegramBot</span><span class="p">(</span><span class="n">token</span><span class="p">)</span>
</span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="n">bot</span><span class="p">.</span><span class="na">startGettingOfUpdatesByLongPolling</span><span class="p">(</span>
</span><span id="__span-1-3"><a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="w"> </span><span class="p">{</span>
</span><span id="__span-1-4"><a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a><span class="w"> </span><span class="n">println</span><span class="p">(</span><span class="nb">it</span><span class="p">)</span><span class="w"> </span><span class="c1">// will be printed each update from chats with messages</span>
</span><span id="__span-1-5"><a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a><span class="w"> </span><span class="p">}</span>
</span><span id="__span-1-6"><a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a><span class="p">)</span>
</span></code></pre></div>
<p>The other way is to use the most basic <code>startGettingOfUpdatesByLongPolling</code> extension:</p>
<div class="language-kotlin highlight"><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="kd">val</span><span class="w"> </span><span class="nv">bot</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">telegramBot</span><span class="p">(</span><span class="n">token</span><span class="p">)</span>
</span><span id="__span-2-2"><a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="n">bot</span><span class="p">.</span><span class="na">startGettingOfUpdatesByLongPolling</span><span class="w"> </span><span class="p">{</span>
</span><span id="__span-2-3"><a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="w"> </span><span class="n">println</span><span class="p">(</span><span class="nb">it</span><span class="p">)</span><span class="w"> </span><span class="c1">// will be printed each update</span>
</span><span id="__span-2-4"><a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="p">}</span>
</span></code></pre></div>
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<li><a href="webhooks.html">Webhooks</a></li>
<li><a href="updates-filters.html">Updates filters</a></li>
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