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laravel_queues.html
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<!DOCTYPE html>
<html lang="en"><head>
<script src="laravel_queues_files/libs/clipboard/clipboard.min.js"></script>
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<meta name="author" content="Vladimir Lelicanin - SAE Institute">
<title>Laravel Queues</title>
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<div class="slides">
<section id="title-slide" data-background-image="https://keystoneacademic-res.cloudinary.com/image/upload/f_auto/q_auto/g_auto/w_256/element/15/156456_sae.jpg" data-background-position="top left" data-background-repeat="no-repeat" data-background-size="100px" class="quarto-title-block center">
<h1 class="title">Laravel Queues</h1>
<div class="quarto-title-authors">
<div class="quarto-title-author">
<div class="quarto-title-author-name">
Vladimir Lelicanin - SAE Institute
</div>
</div>
</div>
</section>
<section class="slide level1">
<h2 id="introduction">Introduction</h2>
<ul>
<li>Asynchronous processing is important to improve the performance of an application</li>
<li>Queuing is a method to execute time-consuming tasks later when the server is not busy</li>
<li>Laravel Queues provides an easy and simple way to implement queuing in your application</li>
</ul>
</section>
<section class="slide level1">
<h2 id="configuration">Configuration</h2>
<ul>
<li>Queues can be configured in the <code>config/queue.php</code> file</li>
<li>Choose the queue driver that suits your application requirements (Sync, Database, Redis, Beanstalkd, Amazon SQS, etc.)</li>
<li>Example configuration for the <code>database</code> driver:</li>
</ul>
<div class="sourceCode" id="cb1"><pre class="sourceCode numberSource php number-lines code-with-copy"><code class="sourceCode php"><span id="cb1-1"><a href="#cb1-1"></a><span class="st">'default'</span> => env(<span class="st">'QUEUE_CONNECTION'</span><span class="ot">,</span> <span class="st">'database'</span>)<span class="ot">,</span></span>
<span id="cb1-2"><a href="#cb1-2"></a></span>
<span id="cb1-3"><a href="#cb1-3"></a><span class="st">'connections'</span> => [</span>
<span id="cb1-4"><a href="#cb1-4"></a></span>
<span id="cb1-5"><a href="#cb1-5"></a> ...</span>
<span id="cb1-6"><a href="#cb1-6"></a></span>
<span id="cb1-7"><a href="#cb1-7"></a> <span class="st">'database'</span> => [</span>
<span id="cb1-8"><a href="#cb1-8"></a> <span class="st">'driver'</span> => <span class="st">'database'</span><span class="ot">,</span></span>
<span id="cb1-9"><a href="#cb1-9"></a> <span class="st">'table'</span> => <span class="st">'jobs'</span><span class="ot">,</span></span>
<span id="cb1-10"><a href="#cb1-10"></a> <span class="st">'queue'</span> => <span class="st">'default'</span><span class="ot">,</span></span>
<span id="cb1-11"><a href="#cb1-11"></a> <span class="st">'retry_after'</span> => <span class="dv">90</span><span class="ot">,</span></span>
<span id="cb1-12"><a href="#cb1-12"></a> ]<span class="ot">,</span></span>
<span id="cb1-13"><a href="#cb1-13"></a></span>
<span id="cb1-14"><a href="#cb1-14"></a> ...</span>
<span id="cb1-15"><a href="#cb1-15"></a>]</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</section>
<section class="slide level1">
<h2 id="creating-jobs">Creating Jobs</h2>
<ul>
<li>Jobs are created using the <code>make:job</code> Artisan command</li>
<li>Example command to create a job:</li>
</ul>
<div class="sourceCode" id="cb2"><pre class="sourceCode numberSource bash number-lines code-with-copy"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1"></a><span class="ex">php</span> artisan make:job MyJob</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<ul>
<li>Jobs are stored in the <code>app/Jobs</code> directory by default</li>
<li>Example of a simple job:</li>
</ul>
<div class="sourceCode" id="cb3"><pre class="sourceCode numberSource php number-lines code-with-copy"><code class="sourceCode php"><span id="cb3-1"><a href="#cb3-1"></a><span class="kw"><?php</span></span>
<span id="cb3-2"><a href="#cb3-2"></a></span>
<span id="cb3-3"><a href="#cb3-3"></a><span class="kw">namespace</span> <span class="cn">A</span>pp\<span class="cn">J</span>obs<span class="ot">;</span></span>
<span id="cb3-4"><a href="#cb3-4"></a></span>
<span id="cb3-5"><a href="#cb3-5"></a><span class="kw">use</span> <span class="cn">I</span>lluminate\<span class="cn">B</span>us\<span class="cn">Q</span>ueueable<span class="ot">;</span></span>
<span id="cb3-6"><a href="#cb3-6"></a><span class="kw">use</span> <span class="cn">I</span>lluminate\<span class="cn">C</span>ontracts\<span class="cn">Q</span>ueue\<span class="cn">S</span>houldQueue<span class="ot">;</span></span>
<span id="cb3-7"><a href="#cb3-7"></a><span class="kw">use</span> <span class="cn">I</span>lluminate\<span class="cn">F</span>oundation\<span class="cn">B</span>us\<span class="cn">D</span>ispatchable<span class="ot">;</span></span>
<span id="cb3-8"><a href="#cb3-8"></a><span class="kw">use</span> <span class="cn">I</span>lluminate\<span class="cn">Q</span>ueue\<span class="cn">I</span>nteractsWithQueue<span class="ot">;</span></span>
<span id="cb3-9"><a href="#cb3-9"></a><span class="kw">use</span> <span class="cn">I</span>lluminate\<span class="cn">Q</span>ueue\<span class="cn">S</span>erializesModels<span class="ot">;</span></span>
<span id="cb3-10"><a href="#cb3-10"></a></span>
<span id="cb3-11"><a href="#cb3-11"></a><span class="kw">class</span> <span class="cn">M</span>yJob <span class="kw">implements</span> <span class="cn">S</span>houldQueue</span>
<span id="cb3-12"><a href="#cb3-12"></a>{</span>
<span id="cb3-13"><a href="#cb3-13"></a> <span class="kw">use</span> <span class="cn">D</span>ispatchable<span class="ot">,</span> <span class="cn">I</span>nteractsWithQueue<span class="ot">,</span> <span class="cn">Q</span>ueueable<span class="ot">,</span> <span class="cn">S</span>erializesModels<span class="ot">;</span></span>
<span id="cb3-14"><a href="#cb3-14"></a></span>
<span id="cb3-15"><a href="#cb3-15"></a> <span class="co">/**</span></span>
<span id="cb3-16"><a href="#cb3-16"></a><span class="co"> * Execute the job.</span></span>
<span id="cb3-17"><a href="#cb3-17"></a><span class="co"> *</span></span>
<span id="cb3-18"><a href="#cb3-18"></a><span class="co"> * </span><span class="an">@return</span><span class="co"> void</span></span>
<span id="cb3-19"><a href="#cb3-19"></a><span class="co"> */</span></span>
<span id="cb3-20"><a href="#cb3-20"></a> <span class="kw">public</span> <span class="kw">function</span> handle()</span>
<span id="cb3-21"><a href="#cb3-21"></a> {</span>
<span id="cb3-22"><a href="#cb3-22"></a> <span class="co">// Do some time-consuming task here</span></span>
<span id="cb3-23"><a href="#cb3-23"></a> }</span>
<span id="cb3-24"><a href="#cb3-24"></a>}</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</section>
<section class="slide level1">
<h2 id="dispatching-jobs">Dispatching Jobs</h2>
<ul>
<li>Jobs can be dispatched using the <code>dispatch</code> function</li>
<li>Example:</li>
</ul>
<div class="sourceCode" id="cb4"><pre class="sourceCode numberSource php number-lines code-with-copy"><code class="sourceCode php"><span id="cb4-1"><a href="#cb4-1"></a><span class="cn">M</span>yJob::dispatch()<span class="ot">;</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<ul>
<li>Jobs can be dispatched with a delay using the <code>delay</code> method</li>
<li>Example:</li>
</ul>
<div class="sourceCode" id="cb5"><pre class="sourceCode numberSource php number-lines code-with-copy"><code class="sourceCode php"><span id="cb5-1"><a href="#cb5-1"></a><span class="cn">M</span>yJob::dispatch()->delay(now()->addMinutes(<span class="dv">5</span>))<span class="ot">;</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<ul>
<li>Jobs can be dispatched to a specific queue using the <code>onQueue</code> method</li>
<li>Example:</li>
</ul>
<div class="sourceCode" id="cb6"><pre class="sourceCode numberSource php number-lines code-with-copy"><code class="sourceCode php"><span id="cb6-1"><a href="#cb6-1"></a><span class="cn">M</span>yJob::dispatch()->onQueue(<span class="st">'my-queue'</span>)<span class="ot">;</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</section>
<section class="slide level1">
<h2 id="running-workers">Running Workers</h2>
<ul>
<li>Workers are processes that run continuously to process queued jobs</li>
<li>Workers can be started using the <code>queue:work</code> Artisan command</li>
<li>Example command to start a worker:</li>
</ul>
<div class="sourceCode" id="cb7"><pre class="sourceCode numberSource bash number-lines code-with-copy"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1"></a><span class="ex">php</span> artisan queue:work</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<ul>
<li>A supervisor can be used to manage your workers and ensure they are always running</li>
</ul>
</section>
<section class="slide level1">
<h2 id="monitoring-queues">Monitoring Queues</h2>
<ul>
<li>Laravel provides several tools to monitor your queues and jobs</li>
<li><code>queue:listen</code> command can be used to monitor a queue</li>
</ul>
<div class="sourceCode" id="cb8"><pre class="sourceCode numberSource bash number-lines code-with-copy"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1"></a><span class="ex">php</span> artisan queue:listen</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<ul>
<li>The <code>horizon</code> package can be used to monitor and manage queues in a more advanced way -> link to the documentation: https://laravel.com/docs/queues#monitoring-queue-health-with-horizon</li>
</ul>
</section>
<section class="slide level1">
<h2 id="retrying-failed-jobs">Retrying Failed Jobs</h2>
<ul>
<li>Failed jobs can be automatically retried based on their configuration</li>
<li>The <code>retryAfter</code> property on a job determines how long it should wait before retrying</li>
<li>The <code>tries</code> property determines how many times a job should be retried</li>
<li>Failed jobs can also be manually retried by calling the <code>retry</code> method on the job instance</li>
</ul>
</section>
<section class="slide level1">
<h2 id="creating-custom-queue-drivers">Creating Custom Queue Drivers</h2>
<ul>
<li>Laravel provides a simple way to create custom queue drivers</li>
<li>Custom drivers can be included as a package, or in the <code>App\Queues</code> directory</li>
<li>Custom drivers should implement the <code>Illuminate\Contracts\Queue\Queue</code> interface</li>
<li>Example custom driver:</li>
</ul>
<div class="sourceCode" id="cb9"><pre class="sourceCode numberSource php number-lines code-with-copy"><code class="sourceCode php"><span id="cb9-1"><a href="#cb9-1"></a><span class="kw"><?php</span></span>
<span id="cb9-2"><a href="#cb9-2"></a></span>
<span id="cb9-3"><a href="#cb9-3"></a><span class="kw">namespace</span> <span class="cn">A</span>pp\<span class="cn">Q</span>ueue<span class="ot">;</span></span>
<span id="cb9-4"><a href="#cb9-4"></a></span>
<span id="cb9-5"><a href="#cb9-5"></a><span class="kw">use</span> <span class="cn">I</span>lluminate\<span class="cn">C</span>ontracts\<span class="cn">Q</span>ueue\<span class="cn">Q</span>ueue <span class="kw">as</span> <span class="cn">Q</span>ueueContract<span class="ot">;</span></span>
<span id="cb9-6"><a href="#cb9-6"></a></span>
<span id="cb9-7"><a href="#cb9-7"></a><span class="kw">class</span> <span class="cn">M</span>yCustomQueue <span class="kw">implements</span> <span class="cn">Q</span>ueueContract</span>
<span id="cb9-8"><a href="#cb9-8"></a>{</span>
<span id="cb9-9"><a href="#cb9-9"></a> <span class="co">// Implement the queue methods here</span></span>
<span id="cb9-10"><a href="#cb9-10"></a>}</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</section>
<section class="slide level1">
<h2 id="scaling-workers">Scaling Workers</h2>
<ul>
<li>Scaling workers is important to handle a large number of jobs and reduce processing time</li>
<li>Increasing the number of workers will result in more jobs being processed concurrently</li>
<li>Use a supervisor to manage multiple workers and control the queue processing</li>
</ul>
</section>
<section class="slide level1">
<h2 id="conclusion">Conclusion</h2>
<ul>
<li>Queues are an important method for asynchronous processing in Laravel applications</li>
<li>Laravel Queues provides a simple and easy way to implement queuing</li>
<li>Custom queue drivers can be created for specific use cases</li>
</ul>
</section>
<section class="slide level1">
<h2 id="references">References</h2>
<ul>
<li>Laravel Queues Documentation: <a href="https://laravel.com/docs/queues" class="uri">https://laravel.com/docs/queues</a></li>
<li>Laravel Horizon Documentation: <a href="https://laravel.com/docs/horizon" class="uri">https://laravel.com/docs/horizon</a></li>
<li>Laravel Supervisor Configuration: <a href="https://laravel.com/docs/queues#supervisor-configuration" class="uri">https://laravel.com/docs/queues#supervisor-configuration</a></li>
<li>Laravel Queue Drivers Documentation: <a href="https://laravel.com/docs/queues#driver-prerequisites" class="uri">https://laravel.com/docs/queues#driver-prerequisites</a></li>
</ul>
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<p>Vladimir Lelicanin - SAE Institute Belgrade</p>
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