By Gergő Törcsvári

Rancher and Grafana – A long case-study to learn some DevOps

Motivation Cryptotrading is so cool and profitable these days… So I decided to try it out. But if you want to do something well, you need a lot of information and tools. I wanted some visualization, with chat (Slack) integration, and some alerting tools/bots. This post will describe the tools I found and started playing […]

Ray Tracing with Akka – Part 4

Where did we stop last time? Read the first part of this series for an intorduction to ray tracing and what I wanted to achieve. Here we created a sphere and a shadow. Read part two for a discussion on creating a plane and letting our objects reflect and refract. Part three has been the most advanced, in here we built […]

Ray Tracing with Akka – Part 3

Where we left off In the last two posts, we reached the capabilities of a simple ray-tracer. We now have two types of shapes (sphere and plane), we can calculate shadows, reflections and refractions recursively. Before we move onto the more computation-heavy shapes, I am curious about how I could move our computations to separated nodes. So […]

Ray Tracing with Akka – Part 1

About this series Most of the time, when you learn a new concept or a new programming language from a(n) (e-)book, you get the basics. But these are really far from the production-ready code with the new toolstack. The only good way to learn programming (like most of the other things in life) is to practice. […]

How are Scala Implicits more explicit than Java Generics?

This blogpost will show you how implicits can solve problems arising from/because of type erasure, proving that Scala implicits sometimes are more explicit than Java generics   All of these code snippets can be copy-pasted to the REPL. Some of the require-s will fail, those are just to demonstrate the expected work without the need […]

How to Write a Custom Protocol for Gatling?

I like to try out new tools and new things, so I decided to loadtest my newly written “simple chat” application to see how AkkaStreams handles load. Starting with load testing, there are some tools out there. The top three are JMeter, Gatling and Tsug. Tsug is written in erlang, and my half year long […]

Working with Microservices in an Ideal World

Generally, microservices are great. In theory, they are divided up well, they are scalable, and they can be maintained easily. With one word, they are great. However, there are some challenges you will most probably encounter when working with microservices. This post will help you get a grip on the world of microservice-development, its challenges, and […]

Java8 orElse versus orElseGet – easily misused

So, the Java8 Optional has two really cool (and similar) functions: the orElse() and the orElseGet(). If we quickly read the javadoc for each, we will only see a small difference; one of them has a T type as a parameter and the other has a function which must return with T (as a parameter). […]