Software engineer, space enthusiast, hiker

Java URL class is broken

Posted on September 2, 2024

The Java programming language is about to turn 30 years old. It has been a widely successful language. One of the keys to its success, in particular in the enterprise world, is its commitment to backwards compatibility. If you take a piece of Java code written three decades ago, changes... [Read More]
Tags:
- java
- url
- dns
Are you leaking this?

Posted on August 21, 2024

Regarding memory management, Java is in general a much safer language than C or C++. However, it is still possible to get in trouble if you are not careful. One common pitfall is to leak the this reference from a constructor, which can produce strange behaviour, since the this reference... [Read More]
Tags:
- java
- this
- memory
- constructor
Why I do not love Mockito annotations

Posted on August 9, 2024

Mockito is an open source mocking library for Java. I have been using Mockito for many years, and I am very grateful to the maintainers of this library for their hard work. Although the practice of mocking is a controversial topic in itself, I have found Mockito to be a... [Read More]
Tags:
- mockito
- java
- testing
- annotations
Terminal setup

Posted on December 25, 2023

NOTE This is not a complete blogpost, just a collection of resources that I use to setup my Mac terminal. This document may be updated at anytime. [Read More]
Tags:
- mac
- zsh
- terminal
Connect HomeKit lights

Posted on December 25, 2023

I have a number of “smart lights” at home from 3 different vendors. I recently had to change to a new iPhone, and after restoring from a backup, some of my carefully setup lights stopped working in the Apple Home (HomeKit) application. The funny thing was the lights were still... [Read More]
Tags:
- mac
- ios
- homekit
- smart
- wifi
- network
- apple
LEGO trains distributed control system using Raspberry Pi, AWS and Trello

Posted on August 26, 2023

(This is a re-publish of the documentation of a project that I did in 2019. Please go to Bitbucket to find the source code.) [Read More]
Tags:
- lego
- aws
- raspberry-pi
- lambda
- python
- trains
- power-up
- sensor
- track
- maker
Five Essential Techniques for Building Fault-tolerant Systems

Posted on August 21, 2023

In 2017 I delivered a talk at Atlassian’s AtlasCamp conference at Barcelona. The topic was how to build fault-tolerant systems. [Read More]
Tags:
Using a custom apex domain with Github Pages

Posted on August 20, 2023

Yesterday I refreshed my website using Jekyll and Github Pages. Today I reconfigured it to be available under my berrueta.net domain. Previously I had instructed my DNS registrar to redirect the traffic from berrueta.net to berrueta.github.io, but I wanted to use the apex domain instead of Github’s. [Read More]
Tags:
- github
- jekyll
- dns
- domain
- gandi
Scaling towards a thousand microservices

Posted on August 20, 2023

In 2019 I prepared a talk about Atlassian’s journey into the world of microservices. At that time the company had around 1,000 microservices running in production, and I thought the story was worth sharing. [Read More]
Tags:
- atlassian
- microservices
- talk
- uniovi
Refreshing my personal website with Github Pages and Jekyll

Posted on August 19, 2023

I created my first personal website around 1996 in the now defunct Geocities. Later I maintained a personal website in asturlinux.org, the local Linux user group that I co-founded. Then I moved to just blogging in blogpost.com and my personal website was no longer maintained. After many years of neglect,... [Read More]
Tags:
- jekyll
- github

Java URL class is broken

Are you leaking this?

Why I do not love Mockito annotations

Terminal setup

Connect HomeKit lights

LEGO trains distributed control system using Raspberry Pi, AWS and Trello

Five Essential Techniques for Building Fault-tolerant Systems

Using a custom apex domain with Github Pages

Scaling towards a thousand microservices

Refreshing my personal website with Github Pages and Jekyll