A Java geek

Most of my blog posts are lessons learned. I’m trying to achieve something, and I document the process I used to do it. This one is one of the few where, in the end, I didn’t achieve what I wanted. In this post, I aim to explain what I learned from trying to migrate from Jekyll to Hugo, and why, in the end, I didn’t take the final step. Context I started this blog on WordPress. After several years, I decided to migrate to Jekyll. I have been happy with Jekyll so far. It̵

When you think of Java modularity, chances are your first thoughts land on JPMS, or perhaps on Spring’s flexible configuration model. For those who 'experienced' like me, thought can reach OSGI specification or other stacks like Vert-X. Yet long before either, Java offered a minimal yet powerful mechanism for loose coupling: ServiceLoader. In this article, we’ll explore what ServiceLoader is, how it works under the hood, what its limitations are, and how to use it effectively in a modern Java e

I got a lot of interesting feedback on Checked exceptions and lambdas. Let’s start with my own: after writing the post, I realized I had written a similar post some time ago. Mistakes I made I made a mistake in the code regarding Apache Commons Lang 3, where I mistakenly used the recover() function, which is actually from Vavr. Apache Commons Lang provides a regular utility function, which mimics the custom code we wrote last week. Vavr offers the Try class, which encapsulates methods

A couple of years ago, I developed a small Kotlin GUI to help me rename my files in batch. I actually created it with different JVM frameworks to compare their relative merits. In any case, I didn’t use it up until last week. And then, I was surprised to see that it didn’t work to rename a network volume, although it had in the past. In this brief post, I aim to describe the issue and its solution. The problem When launching the UberJAR, I couldn’t see the network volumes. I

Java’s checked exceptions were a massive improvement over C’s error-handling mechanism. As time passed and experience accumulated, we collectively concluded that we weren’t there yet. However, Java’s focus on stability has kept checked exceptions in its existing API. Java 8 brought lambdas after the 'checked exceptions are great' trend. None of the functional interface methods accepts a checked exception. In this post, I will demonstrate three different approaches to mak

I have spent some time last year implementing Cloudflare Tunnels on my Home Assistant and my Synology NAS. On Mastodon, I had not one but two commenters advertising for Tailscale: Post by @frankel@mastodon.top View on Mastodon I decided to give it a try and migrate my servers and devices to Tailscale. In this post, I want to describe how I did. Thanks to Heiko Does and higgins for prompting me to look further! What is Tailscale, how and why? A Zero Trust identity-based connectivity

From the beginning, the focus of this blog has been technical, very rarely organizational. I broke this unwritten rule once in 2015. I began writing retrospectives in 2023 on the year that had passed. Let’s continue the tradition, but with a wider scope than before. The situation warrants it. More chaos It’s a hard realization to admit, but the world is spiraling deeper and deeper into chaos. Russia’s invasion of Ukraine has now dragged into its third year, and still, neithe

I have been eyeing the YOW! conferences for probably more than a decade. They occur in Australia, and feature top industry experts. I was thus overjoyed when they invited me to speak on the YOW! tour earlier this year. Here’s a summary of my amazing time there. My participation YOW! takes place in three different cities: Melbourne, Brisbane, and Sidney. I presented my brand new talk on WebAssembly on Kubernetes in each city. It stems from an earlier article, which I reworked and updated

One of the most important concepts to master in Rust is ownership and borrowing. Tons and tons of articles are solely dedicated to this narrow subject. This one tries to explain the concept with examples. I hope it helps you. Ownership is a set of rules that govern how a Rust program manages memory. All programs have to manage the way they use a computer’s memory while running. Some languages have garbage collection that regularly looks for no-longer-used memory as the program runs; in other

I decided to stop using Twitter, but for my own content and supporting Ukraine against its barbarian invaders, I understood the contemporary media landscape was quite fragmented. I bet on Mastodon, Bluesky, and LinkedIn. My flow is the following: when I read a piece I find interesting, I schedule it for publication. The problem is that every social media platform has a different scheduler: Mastodon has the Mastodon scheduler, LinkedIn has an in-built feature, and Bluesky has…​ nothing