Introduction Technology choices are often influenced by hype or company politics. People tend to over-engineer using tools allowing them to handle “future” traffic, which is rarely achieved. Of course, sometimes they just want to have fun by using something new. Today, let’s have a solid discussion about databases! We’re going to…

Apache Cassandra is one of the most popular NoSQL databases. It isn’t, however, the easiest one to use. In most cases it does not fit to the project due to difficult modelling methodology and limitations around possible queries. …

Apache Kafka is becoming more and more popular. Plenty of Kafka related content is being published. However, where to start if you don’t know too much about it? Or where to get to know more if you already know the basics? That’s the questions I’ll try to answer today. Beginner First…

Apache Kafka is currently very popular. It is being leveraged as a message broker but can be extended by additional tools to become a whole message processing platform. It is often used to communicate microservices in an asynchronous manner but also to process streams of messages. Every tool has its…

Over the last few years, Apache Kafka has been adopted by a lot of companies. Some claim that it is one of the most popular tools in the world. According to enlyft more than 20 500 companies reportedly use Kafka in their tech stacks, including Uber, Shopify, and Spotify. What…

In previous blog posts we have described what the microservices are and how they can communicate. Today let’s focus on the infrastructure around them. It may seem that when moving to microservices, the only thing you need to do is to code smaller projects and apply all those rules of…

As programmers we are dealing with various tasks on daily basis. Some are boring, some fascinating. Nevertheless there are a few general problems everyone encounters at some point. These challenges often appear when real-world domain meets the technology limitations. …

Writing tests is crucial. Sometimes it’s difficult, sometimes boring, but it is needed to prove that the system works correctly. When an application includes a database, queue or other dependencies, then you need to write integration tests, confirming that integration with those systems is done properly. You need to check…

In the previous blog post we have described the Scala application structure, now we’re going to focus on the whole lifecycle, including the initialization and shutdown. Lifecycle During application startup, there are usually multiple typical operations to be performed. First, it is needed to load configuration, usually from resource files. Then…