First Months using GitHub Actions

February 18, 2022

I really wanted to give GitHub Actions a go. Having spent many years using Jenkins setups, the idea of outsourcing CI/CD to GitHub made a lot of sense. Fast forward to a few weeks later, we have a fully functional Continuous Delivery structure. Let me give you a quick tour.

Tackling accidental complexity with Optional in Java

April 28, 2021

In this article, I'm using an example project to show you how Java 8 Optional can impact the end complexity. It can do so in a positive or negative way as Optional can both simplify and complicate your code. In the long run, the outcome can greatly influence your project. Let's see how it works.

The Secret of Painless WebSocket Tests with Spock Framework

May 18, 2020

Do you want to start testing applications with WebSocket and Spock, but you’re afraid of running an unstable test? You know what the cinematic Spock says, “Insufficient facts always invite danger”!

Get your facts straight and learn how to avoid common mistakes with our step-by-step guide to WebSocket testing.

Sane Single Page Apps: Easy Data Handling with DTOs

June 9, 2016

When a software collapses, it’s usually due to it being no longer maintainable because of complexity. Brian Kernighan, the creator of AWK programming language, puts it quite explicitly: "Controlling complexity is the essence of computer programming".

Gerrit based Workflow - Complete Developer's Walkthrough

May 19, 2016

We have successfully adopted the Gerrit workflow for pre-commit code review in Evojam. We believe that this a foundation of high quality of our solutions. After two years we have worked out a complete approach for the pre-commit review with Gerrit, branching model and application provisioning. Now I have realized the there is no definite cookbook for the newcomers. This led me to the idea that it may be worth to share this approach with the community. This is not totally unique but may save a newcomer a bit of time.

Spot Performance Issues Before They Arise: Effective Performance Monitoring with Gatling and ELK

May 11, 2016

Performance is a complicated beast. Each step in the problem solving chain of performance issues - identification, diagnosis, rectification and verification, pose unique challenges. This post will deal with themes from the first two steps, and is aimed at teams who are already conducting some form of performance testing.

Simple NLP Search in Your Application - Step-by-Step Guide in Scala

May 5, 2016

Full text search is easy to use. But the inherent ambiguity of natural languages causes search results to be biased with false positives. To obtain more accurate results, we need to change the approach and provide more domain specific data to the search engine.

Practical Intro to Monads in JavaScript: Validation

April 26, 2016

Few weeks ago I published a practical Intro to Monads in JavaScript where I covered basics of Identity and Maybe monads. Some time later I added a tutorial on Either monad and fails-fast error handling. This time I will show you error accumulation in a simple Validation use case.

Practical Intro to Monads in JavaScript: Either

March 21, 2016

My simple and practical Intro to Monads in JS, where I covered basics of Identity and Maybe monads, seemed to be helpful for a lot of folks, so I’ve decide to continue the topic. Now it’s time for Either – a tool for fast-failing, synchronous computation chains. A tool that may increase readability and quality of code while reducing error proneness. The best part is that we can still ignore the category theory!

Practical Intro to Monads in JavaScript

February 22, 2016

If you’ve heard about Monads but never had time learn them, here’s a simple explanation. Not a theoretical nonsense. It’s a simple, practical tutorial for JavaScript developers showing how some monads can be used. It’s for engineers, not scientists.

Technology Blog