{"id":3427,"date":"2022-12-07T10:33:06","date_gmt":"2022-12-07T10:33:06","guid":{"rendered":"http:\/\/the-codest.localhost\/blog\/learn-more-about-ruby-on-rails-with-pub-sub\/"},"modified":"2026-03-09T13:04:35","modified_gmt":"2026-03-09T13:04:35","slug":"leer-meer-over-ruby-on-rails-met-pub-sub","status":"publish","type":"post","link":"https:\/\/thecodest.co\/nl\/blog\/learn-more-about-ruby-on-rails-with-pub-sub\/","title":{"rendered":"Meer informatie over Ruby on Rails met Pub\/Sub"},"content":{"rendered":"<p><strong><a href=\"https:\/\/thecodest.co\/nl\/case-studies\/providing-a-team-of-ruby-developers-for-a-fintech-company\/\">Ruby<\/a> op <a href=\"https:\/\/thecodest.co\/nl\/blog\/ways-to-increase-your-rails-performance\/\">Rails<\/a><\/strong> (Rails, <a href=\"https:\/\/thecodest.co\/nl\/blog\/hire-ror-developer\/\">RoR<\/a>) is een bekende <a href=\"https:\/\/thecodest.co\/nl\/blog\/find-your-ideal-stack-for-web-development\/\">web<\/a> toepassingsraamwerk geschreven in het <strong>Ruby<\/strong> programmeertaal. <strong>Pub\/Sub<\/strong> is een afkorting van software ontwerppatronen genaamd <b>Publiceren-afmelden<\/b>. Ik zal uitleggen hoe communicatie tussen software componenten in Rails kan worden afgehandeld door Pub\/Sub.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Wat is Pub\/sub?<\/h2>\n\n\n\n<p><strong>Pub\/sub<\/strong> is een software-ontwerppatroon dat voorziet in service-naar-service communicatie. Service<br>houdt een van de twee rollen in: uitgever (die produceert) of ontvanger (die consumeert). Wat is<br>geproduceerd om te worden geconsumeerd, wordt bepaald als een gebeurtenis, een bericht of een melding. In de<br>In de context van dit artikel worden ze door elkaar gebruikt om naar hetzelfde te verwijzen.<br>De dienst die produceert weet niet wie consumeert. De dienst die consumeert weet niet<br>de oorsprong van het bericht kennen. Ze kunnen onbekend blijven voor elkaar. Dit is anders dan<br>wachtrijen voor berichten, waarbij de component die het bericht verzendt vaak de bestemming kent<br>- Met deze manier van berichten versturen kun je overal berichten naartoe sturen. Dit mechanisme is een kern<br>van <strong>Pub\/sub<\/strong> en het betekent dat ze ontkoppeld zijn.<\/p>\n\n\n\n<p>Om hun wederzijdse belangen tot uitdrukking te brengen, moeten ze een gemeenschappelijk begrip delen. Daarom,<br>beide rollen hebben een impliciet mechanisme van de stok waarbij de producent van een bericht en de<br>consument van het bericht ontmoeten. Dit mechanisme wordt onderwerp, abonnement of topic genoemd. Het is<br>verantwoordelijk voor het categoriseren van berichten naar onderwerpen, het is in wezen een stateloos berichtfilter.<br>Onderwerpen fungeren als zendstations. Een uitgever stuurt het bericht naar het onderwerp,<br>abonnees ontvangen onmiddellijk het bericht van het onderwerp. Vanwege de ontkoppelde<br>diensten is de meest effici\u00ebnte manier om berichten uit te wisselen om ze asynchroon af te handelen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Rails zonder Pub\/Sub<\/h2>\n\n\n\n<p>Standaard is er geen Rails-overhead voor software-ontwerppatronen voor het doorgeven van berichten tussen componenten. Ontwikkelaars gebruiken standaard <strong>objectgeori\u00ebnteerd programmeren<\/strong> (<a href=\"https:\/\/thecodest.co\/nl\/dictionary\/object-oriented-programming-oop\/\">OOP<\/a>) paradigma: parameters doorgeven aan functies, klassen vragen over waarden.<\/p>\n\n\n\n<p>Als de applicatie vrij ongecompliceerd is, kan dit voldoende zijn. Als de applicatie groeit, bijvoorbeeld, moeten sommige bewerkingen asynchroon worden uitgevoerd, dan is de <a href=\"https:\/\/thecodest.co\/nl\/dictionary\/why-do-projects-fail\/\">project<\/a> heeft een abstractie nodig die oplost dat <a href=\"https:\/\/thecodest.co\/nl\/blog\/app-data-collection-security-risks-value-and-types-explored\/\">gegevens<\/a> workflow. In plaats van het wiel opnieuw uit te vinden, kunnen ontwikkelaars het volgende implementeren <strong>Pub\/sub<\/strong> om dit gebrek aan abstractie op te vullen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Voordelen van Pub\/Sub met Rails<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Active Record Callbacks vermijden.<\/li>\n\n\n\n<li>Door asynchrone parallelle verwerking aan een systeem toe te voegen, worden prestaties, betrouwbaarheid en <a href=\"https:\/\/thecodest.co\/nl\/blog\/difference-between-elasticity-and-scalability-in-cloud-computing\/\">schaalbaarheid<\/a> worden verbeterd.<\/li>\n\n\n\n<li>Berichten kunnen asynchroon worden uitgezonden naar verschillende delen van het systeem.<\/li>\n\n\n\n<li>Hiermee kunnen berichten asynchroon worden uitgezonden naar verschillende delen van een systeem.<\/li>\n\n\n\n<li>Ontkoppeling - het toevoegen of wijzigen van een functionaliteit heeft geen invloed omdat Pub\/Sub<br>kun je aanpassen hoe alles op elkaar inwerkt.<\/li>\n\n\n\n<li>De berichtenconsument hoeft niet langer periodiek te controleren op updates of nieuwe<br>informatie. Het vermindert de afleverlatentie die vooral problematisch kan zijn in systemen<br>zonder tolerantie voor vertragingen.<\/li>\n\n\n\n<li>Er is geen limiet aan het aantal abonnees dat het systeem aankan, omdat het kan veranderen,<br>upgraden, vermenigvuldigen of verdwijnen.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Nadelen van Pub\/Sub met Rails<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Het grote nadeel van Pub\/Sub systemen is de ontkoppeling van uitgever en<br>abonnee.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Rails Pub\/Sub invoeren<\/h2>\n\n\n\n<p>Voorbeelden van broncode in Rails is geschreven met behulp van bibliotheek<br><a href=\"https:\/\/github.com\/stevo\/pubsub_on_rails\" rel=\"nofollow\">Pub\/Sub op Rails<\/a> (in de nomenclatuur van Ruby wordt een bibliotheek gem genoemd): Meer details vind je in de readme van de gem. De implementatie bestaat uit modules:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Domein,<\/li>\n\n\n\n<li>Evenement,<\/li>\n\n\n\n<li>Gebeurtenis handler,<\/li>\n\n\n\n<li>Uitgever,<\/li>\n\n\n\n<li>Inschrijving.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Domein<\/h3>\n\n\n\n<p>Beschrijft bedrijfslogica om Pub\/Sub van context te voorzien en daardoor schoon te maken <a href=\"https:\/\/thecodest.co\/nl\/dictionary\/what-is-code-refactoring\/\">code<\/a>.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\"> module Meldingen\n   uitbreiden PubSub::Domein\n einde<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\"> module Rapporten\n   uitbreiden PubSub::Domein\n einde\n\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Evenement<\/h3>\n\n\n\n<p>Het is een klasse die beschrijft wat er is gebeurd. Declareer de classnaam zo zelfbeschrijvend mogelijk met wat er is gebeurd, bijvoorbeeld: geannuleerd, gewijzigd, aangemaakt, vernietigd, verzonden, bijgewerkt. Namen van gebeurtenissen kunnen er als volgt uitzien: ProfitAndLossStatementCreatedEvent, wat betekent dat er een financieel overzicht is aangemaakt.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\"> klasse Reports::ProfitAndLossStatementCreatedEvent &lt; PubSub::DomainEvent\n   attribuut :profit_and_loss_statement_id, Types::Strict::Integer\n einde<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Evenement uitgever<\/h3>\n\n\n\n<p>Klasse die gebeurtenissen kan uitzenden. Het voorbeeld toont het maken van een servicerapport. Als het rapport met succes is gemaakt, wordt de gebeurtenis voor het maken van dat rapport uitgezonden.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\">klasse rapporten::winst-en-verliesrekening service\n   include PubSub::Emit\n    def uitvoeren\n     emit(:report_profit_and_loss_statement_created, profit_and_loss_statement_id: id) if result.ok?\n   einde\n einde<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Gebeurtenis handler<\/h3>\n\n\n\n<p>Deze klasse moet worden uitgevoerd als reactie op het afhandelen van een gebeurtenis.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"ruby\" class=\"language-ruby\">module Meldingen\n Klasse ReportsProfitAndLossStatementCreatedHandler &lt; PubSub::DomainEventHandler\n   def oproep\n     ReportMailer.profit_and_loss_statement(profit_and_loss_statement).deliver_now\n   einde\n\n   priv\u00e9\n\n   def winst_en_verlies_statement\n     ProfitAndLossStatement.find(event_data.profit_and_loss_statement_id)\n   einde\n einde\neinde<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Abonnement<\/h3>\n\n\n\n<p>Gebeurtenissen zijn gebonden aan hun afhandelaars door middel van abonnementen.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"yaml\" class=\"language-yaml\">meldingen:\n reports__profit_and_loss_statement_created: async<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Voorbeeldgebruiksgevallen:<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\"Volgfunctie in sociale netwerken,<\/li>\n\n\n\n<li>Internet der dingen,<\/li>\n\n\n\n<li>Mailing,<\/li>\n\n\n\n<li>Melding over gegenereerde bestanden.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Vergelijkbare patronen<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><b>EventBus<\/b> - Componenten kunnen gebeurtenissen naar EventBus sturen zonder te weten wie ze ophaalt of hoeveel respondenten er komen. <a href=\"https:\/\/thecodest.co\/nl\/blog\/react-development-all-you-have-to-know\/\">reageren<\/a>,<\/li>\n\n\n\n<li><b>Waarnemer<\/b> - het subject onderhoudt een lijst van afhankelijke personen, waarnemers genaamd, en stelt ze op de hoogte wanneer hun toestand verandert,<\/li>\n\n\n\n<li><b>Pooling<\/b> - Bij polling vragen clients periodiek aan het systeem of er nieuwe gebeurtenissen of gegevens zijn.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Juwelen<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\n<p><a href=\"https:\/\/github.com\/edisonywh\/rocketman\" rel=\"nofollow\">https:\/\/github.com\/edisonywh\/rocketman<\/a><\/p>\n<\/li>\n\n\n\n<li>\n<p><a href=\"https:\/\/github.com\/krisleech\/wisper\" rel=\"nofollow\">https:\/\/github.com\/krisleech\/wisper<\/a><\/p>\n<\/li>\n\n\n\n<li>\n<p><a href=\"https:\/\/github.com\/stevo\/pubsub_on_rails\" rel=\"nofollow\">https:\/\/github.com\/stevo\/pubsub<em>op<\/em>rails<\/a><\/p>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Samenvatting<\/h2>\n\n\n\n<p>Pub\/sub is geen gebruikelijke aanpak in Ruby in Rails. Zoals ge\u00efntroduceerd in het artikel, kan dit patroon veel voordelen opleveren voor het project - het kan de code schoon maken, services ontkoppelen en ze gemakkelijk schaalbaar maken.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/thecodest.co\/contact\"><img decoding=\"async\" src=\"\/app\/uploads\/2024\/05\/interested_in_cooperation_.png\" alt=\"vaandel samenwerking\"\/><\/a><\/figure>","protected":false},"excerpt":{"rendered":"<p>Pub\/Sub kan veel voordelen opleveren voor een project - het kan de code opschonen, services ontkoppelen en ze eenvoudig schaalbaar maken. Leer meer over Pub\/Sub in het volgende artikel en verbeter je project!<\/p>","protected":false},"author":2,"featured_media":3428,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[8],"tags":[12],"class_list":["post-3427","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software-development","tag-it"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Learn More about Ruby on Rails with Pub\/Sub - The Codest<\/title>\n<meta name=\"description\" content=\"Explore the Pub\/Sub design pattern in Ruby on Rails and see how it enables event-driven communication and scalable system architecture.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thecodest.co\/nl\/blog\/leer-meer-over-ruby-on-rails-met-pub-sub\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Learn More about Ruby on Rails with Pub\/Sub\" \/>\n<meta property=\"og:description\" content=\"Explore the Pub\/Sub design pattern in Ruby on Rails and see how it enables event-driven communication and scalable system architecture.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thecodest.co\/nl\/blog\/leer-meer-over-ruby-on-rails-met-pub-sub\/\" \/>\n<meta property=\"og:site_name\" content=\"The Codest\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-07T10:33:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-09T13:04:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thecodest.co\/app\/uploads\/2024\/05\/ruby_on_rails_with_pubsub.png\" \/>\n\t<meta property=\"og:image:width\" content=\"960\" \/>\n\t<meta property=\"og:image:height\" content=\"540\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"thecodest\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"thecodest\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/learn-more-about-ruby-on-rails-with-pub-sub\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/learn-more-about-ruby-on-rails-with-pub-sub\\\/\"},\"author\":{\"name\":\"thecodest\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/#\\\/schema\\\/person\\\/7e3fe41dfa4f4e41a7baad4c6e0d4f76\"},\"headline\":\"Learn More about Ruby on Rails with Pub\\\/Sub\",\"datePublished\":\"2022-12-07T10:33:06+00:00\",\"dateModified\":\"2026-03-09T13:04:35+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/learn-more-about-ruby-on-rails-with-pub-sub\\\/\"},\"wordCount\":778,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/learn-more-about-ruby-on-rails-with-pub-sub\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/thecodest.co\\\/app\\\/uploads\\\/2024\\\/05\\\/ruby_on_rails_with_pubsub.png\",\"keywords\":[\"IT\"],\"articleSection\":[\"Software Development\"],\"inLanguage\":\"nl-NL\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/thecodest.co\\\/blog\\\/learn-more-about-ruby-on-rails-with-pub-sub\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/learn-more-about-ruby-on-rails-with-pub-sub\\\/\",\"url\":\"https:\\\/\\\/thecodest.co\\\/blog\\\/learn-more-about-ruby-on-rails-with-pub-sub\\\/\",\"name\":\"Learn More about Ruby on Rails with Pub\\\/Sub - 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