Notes and findings from a Ruby developerhttps://v2.luizkowalski.net/https://v2.luizkowalski.net/blog/deploying-spring-cloud-netflix-apps-on-kubernetes/https://v2.luizkowalski.net/blog/deploying-spring-cloud-netflix-apps-on-kubernetes/If you are deploying containers on production, Kubernetes is a no-brainer solution. It takes some time to get familiar with all concepts but once you understand it, piece of cake 🍰. So today I wannMon, 30 Oct 2017 09:19:03 GMThttps://v2.luizkowalski.net/blog/double-click-to-submit-form-pattern-with-stimulus-revisited/https://v2.luizkowalski.net/blog/double-click-to-submit-form-pattern-with-stimulus-revisited/Some months ago, I wrote about something I built, a component to submit forms with a double-click, where the user has to confirm the action, potentially avoiding miss-clicks and doing something irreveTue, 01 Apr 2025 15:07:22 GMThttps://v2.luizkowalski.net/blog/double-click-to-submit-pattern-with-stimulus/https://v2.luizkowalski.net/blog/double-click-to-submit-pattern-with-stimulus/While tinkering around with a home lab and CasaOS, I encountered this pattern where certain actions require a "double click", like this: I wanted to see how hard it was to copy this with Stimulus, anWed, 25 Sep 2024 13:50:07 GMThttps://v2.luizkowalski.net/blog/encapsulation-in-ruby-on-rails/https://v2.luizkowalski.net/blog/encapsulation-in-ruby-on-rails/In Object-Oriented Programming, encapsulation is one of the fundamentals concept. Understand encapsulation will help you write concise and easy to maintain code. But what exactly is encapsulation? If Fri, 26 Oct 2018 14:18:20 GMThttps://v2.luizkowalski.net/blog/event-sourcing-with-spring-boot-and-kotlin/https://v2.luizkowalski.net/blog/event-sourcing-with-spring-boot-and-kotlin/In the past months I've been playing around with Kotlin and Spring's event sourcing engine. To get to know it better, I build a really simple clone of Untappd. If you don't know Untappd, a tl;dr is: FMon, 30 Jul 2018 12:04:54 GMThttps://v2.luizkowalski.net/blog/netflix-oss-a-beginners-guide-pt1/https://v2.luizkowalski.net/blog/netflix-oss-a-beginners-guide-pt1/In this series of posts, I'll try to get you inside the Netflix stack: understand how it works and get your feet wet in the microservices world. So, to begin, we need to know the first component of Tue, 07 Jun 2016 19:51:33 GMThttps://v2.luizkowalski.net/blog/netflix-oss-a-beginners-guide-pt2/https://v2.luizkowalski.net/blog/netflix-oss-a-beginners-guide-pt2/In the last post, I showed how to create a Eureka server. Now we'll go through the process of creating microservice and register it on Eureka. To begin, you can create a simple project with one entiTue, 21 Jun 2016 20:20:26 GMThttps://v2.luizkowalski.net/blog/netflix-oss-a-beginners-guide-pt3/https://v2.luizkowalski.net/blog/netflix-oss-a-beginners-guide-pt3/So far, we created an Eureka server, a microservice and registered it in Eureka. You can access this microservice directly through his IP, but later, when you service grow and you need to scale it, pMon, 10 Oct 2016 20:09:31 GMThttps://v2.luizkowalski.net/blog/netflix-oss-a-beginners-guide-pt4/https://v2.luizkowalski.net/blog/netflix-oss-a-beginners-guide-pt4/When a system grows, you need some kind of monitoring as well. If you have a monolithic app, that is not really a hard task, but when it comes to microservices word, things change. How to keep track Thu, 24 Nov 2016 13:53:11 GMThttps://v2.luizkowalski.net/blog/production-grade-ish-deployment-on-hetzner-with-kamal/https://v2.luizkowalski.net/blog/production-grade-ish-deployment-on-hetzner-with-kamal/I've been toying around with Kamal for some time now, and I believe I have come up with a nice setup for a reasonably robust deployment. It includes two servers, one for the application and another foSun, 21 Jan 2024 20:47:52 GMThttps://v2.luizkowalski.net/blog/refactoring-legacy-ruby-on-rails-apps/https://v2.luizkowalski.net/blog/refactoring-legacy-ruby-on-rails-apps/I have this idea: Chathub, an app that turns Github's organizations and/or repositories into chat rooms, pretty much like Gitter. I use this idea every time I want to build a new PoC. So I did it in RThu, 24 Nov 2016 18:37:13 GMThttps://v2.luizkowalski.net/blog/taming-complex-service-objects-with-dry/https://v2.luizkowalski.net/blog/taming-complex-service-objects-with-dry/As your Rails app grows, MVC feels inadequate. Should I put complex business rules in the models or the controllers? Should I just put everything in Concerns? At this point, most developers fall back Sun, 07 Aug 2022 21:50:52 GMThttps://v2.luizkowalski.net/blog/traefik-with-kamal-tips-and-tricks/https://v2.luizkowalski.net/blog/traefik-with-kamal-tips-and-tricks/It took me some time to finally figure out Traefik and some more time to put two and two together, so I'd like to share some things I learned on how to get it to work smoothly with Kamal. Traefik is Sat, 10 Feb 2024 15:48:15 GMThttps://v2.luizkowalski.net/blog/using-concurrent-ruby-in-a-rails-application/https://v2.luizkowalski.net/blog/using-concurrent-ruby-in-a-rails-application/Concurrency in Ruby is still a gray zone for many developers. If you know anything about concurrency, you probably know that Ruby is thread-safe by default because the Global VM Lock only uses one thrSun, 18 Apr 2021 17:37:31 GMThttps://v2.luizkowalski.net/blog/validating-mandrill-webhook-signatures-on-rails/https://v2.luizkowalski.net/blog/validating-mandrill-webhook-signatures-on-rails/I'm writing this post partially because I couldn't find anything exactly like this and to keep a log for me, in case I have to deal with this once again. Since Mandrill does not provide a way to authFri, 24 Apr 2020 16:44:42 GMT