185 lines
6.9 KiB
HTML
185 lines
6.9 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Event Store − Thibaud Dauce</title>
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<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
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<meta name="author" content="Hakim El Hattab">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
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<link rel="stylesheet" href="css/reveal.css">
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<link rel="stylesheet" href="css/theme/solarized.css" id="theme">
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<!-- Code syntax highlighting -->
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<link rel="stylesheet" href="lib/css/zenburn.css">
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<!-- Printing and PDF exports -->
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<script>
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Reveal.configure({ slideNumber: true });
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var link = document.createElement( 'link' );
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link.rel = 'stylesheet';
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link.type = 'text/css';
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link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
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document.getElementsByTagName( 'head' )[0].appendChild( link );
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</script>
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<!--[if lt IE 9]>
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<script src="lib/js/html5shiv.js"></script>
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<![endif]-->
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</head>
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<body>
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<div class="reveal">
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<!-- Any section element inside of this container is displayed as a slide -->
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<div class="slides">
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<section>
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<h1>Event Store</h1>
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<h3>Java User Group — 23 février 2016</h3>
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<p>
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<small><a href="https://thibaud.dauce.fr">Thibaud Dauce</a></small>
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</p>
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</section>
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<section>
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<h2>Domain Driven Design</h2>
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<h4>La conception doit mettre l'accent sur le domaine</h4>
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<h4>créer un utilisateur != inscription d'un client</h4>
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<p>
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<small>Conférence de Cyrille Martraire à Codeurs en Seine 2015</small>
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</p>
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</section>
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<section>
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<h2 style="font-size: 2em;">Command Query Responsibility Segregation</h2>
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<h4>Séparation des requêtes sur les données et des modifications des données</h4>
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<p>
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<small>Conférence de Eric et Sébastian Le Merdy à Codeurs en Seine 2015</small>
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</p>
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</section>
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<section>
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<h2>Event Sourcing</h2>
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<h4>Stocker l'état de l'application comme une succession d'événements</h4>
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<p>
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<small><a href="http://martinfowler.com/eaaDev/EventSourcing.html">Article de Martin Fowler sur l'Event Sourcing</a></small>
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</p>
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</section>
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<section>
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<h2>Qu'est-ce qu'un événement ?</h2>
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<h4>Une simple structure de données</h4>
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<pre><code data-trim data-noescape>
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public final class ArticleWasPublished {
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private UUID articleId;
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private UUID publisherId;
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public ArticleWasPublished (UUID articleId, UUID publisherId) {
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this.articleId = articleId;
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this.publisherId = publisherId;
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}
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public UUID getArticleId() { return this.articleId; }
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public UUID getPublisherId() { return this.publisherId; }
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}
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</code></pre>
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</section>
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<section>
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<h2>Exemple de modèle évènementiel</h2>
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<h3>vos comptes en banque</h3>
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<table>
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<tr>
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<th>Date</th><th>Compte</th><th>Libellé</th><th>Changement</th>
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</tr>
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<tr>
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<td>20/02/2016</td><td>042</td><td>Remboursement</td><td>+20€</td>
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</tr>
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<tr>
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<td>12/02/2016</td><td>042</td><td>Facture</td><td>-20€</td>
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</tr>
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<tr>
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<td>08/02/2016</td><td>042</td><td>Courses</td><td>-12€</td>
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</tr>
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<tr>
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<td>06/02/2016</td><td>042</td><td>Virement initial</td><td>100€</td>
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</tr>
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</table>
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</section>
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<section>
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<h2>Avantages</h2>
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<ul>
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<li>Utilisation du langage du domaine pour les évènements</li>
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<li>Modifications explicites, pas de perte d'information</li>
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<li>Mise à l'échelle très facile car système en ajout-seulement</li>
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</ul>
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</section>
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<section>
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<h2>Problème</h2>
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<h4>Comment connaître le solde à un instant t ?</h4>
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<h4>Obligation de recalculer à chaque fois = coûteux en temps</h4>
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</section>
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<section>
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<h2>Solution</h2>
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<h4>Mettre en place du cache ou des snapshots</h4>
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</section>
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<section>
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<h2>Architecture type</h2>
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<img src="images/architecture.svg" alt="Architecture" style="border: none; box-shadow: none;"/>
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</section>
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</div>
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</div>
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<script src="lib/js/head.min.js"></script>
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<script src="js/reveal.js"></script>
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<script>
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// Full list of configuration options available at:
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// https://github.com/hakimel/reveal.js#configuration
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Reveal.initialize({
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controls: true,
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progress: true,
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history: true,
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center: true,
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slideNumber: 'c/t',
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transition: 'slide', // none/fade/slide/convex/concave/zoom
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// Optional reveal.js plugins
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dependencies: [
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{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
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{ src: 'plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
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{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
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{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
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{ src: 'plugin/zoom-js/zoom.js', async: true },
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{ src: 'plugin/notes/notes.js', async: true }
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]
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});
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</script>
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</body>
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</html>
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