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Imagine writing your actor logic once (typed messages, functional state, the ! operator, supervision and all) and then deciding on a whim whether it runs as a JVM service, a self-contained native binary, or a live interactive app in your browser. No rewrites, no ports, no platform-specific glue. Just one codebase. Cats-Actors can do that now, and in this post we are going to have some fun with it.…
Today marks an exciting milestone with the release of Cats-Actors 2.0.0-RC1. This version introduces typed actors, a feature that the community has eagerly awaited. To showcase this new capability, we’ll walk through a classic example of handling wallet transactions between two users, Alice and Bob. So, sit back and relax as we explore how Alice sends money to Bob using typed actors in…
Functional programming and the actor model are two powerful paradigms in modern software development. They might seem like they’re in opposition, but in reality, they complement each other beautifully. Scala, as a versatile language, allows multiple paradigms to coexist, and Cats-Actors, a functional programming-based actor system, exemplifies this harmony. Cats-Actors is a reimagining of the…
This post is an adaptation of the talk FP to the max, credit goes to John A De Goes. We will take a minimal example written in a procedural style and introduce functional programming techniques and principles to create a more principled application. It is important to preface this post with a disclaimer which is :warning:Do not try this on your codebase!!:warning: - this example is an overkill and…
It’s been one heck of a week! I’m back from the Google Cloud Summit in Milan - #GoogleCloudSummit - where Mattia (@mattiagnd) and I spoke about Node management in GKE. In this blog I would like to take some points discussed in that presentation and really outline some key takeaways; specifically what happens during an upgrade and what steps we (as clients of GKE) can take in order to manage…
I have been doing functional programming for quite some time in the small - map, filter, flatMap, for comprehensions, catz etc. While I was sold on the great benefits of FP I’ve struggled to transition to doing FP in the large without hitting runtime overheads. This is where ZIO comes in the picture. ZIO makes programming in the large simple and provides the ability to interop with other parts of…
This April Google organised the first Google Cloud Event here in Malta. During that event I presented our reasons, as a company, for moving to Kubernetes. Many have reached out after the presentation to discuss further and some suggested publishing our motivations online for reference. So here I am typing away :grimacing:!
One question which often crops up when mentioning Functional Programming (FP) is “But what’s the point of using FP? Why would I change from an Imperative Programming (IP) paradigm to FP if both solve the same class of problems?”. To the uninitiated FP represents a surface level refactor to use “newer methods” such as map, flatMap and filter with a sprinkle of classes such as Option(al) and Either…
Introduced by Alonzo Church in the 1930s, $\lambda$-calculus can be considered as the smallest computation programming language of the world. Reading through the various tutorials one can find various examples which showcase its universality; addition, conditional operators, equality and inequality and recursion. One thing which always intrigued me is how applicable is $\lambda$-calculus to…
Headless CMSs are becoming quite popular and make up one of the important ingredients of a JAMstack site. At SuprNation we have been tinkering with headless CMSs for quite a while and we have succesfully implemented one using Wordpress (WP), Advanced Custom Fields (ACF) and ACF-to-Rest API in one of our experiments. This trio can be used to implement a cheap and flexible headless CMS but as anyone…
