While optimistic locking handling in JPA is relatively well-known, it is usually poorly tested or not tested at all. In this blog post I will show you firstly what does optimistic locking handling mean and how you could implement it within a Spring Boot Application and JPA. After that you could see a way to write integration tests, which I hope could surprise you with their simplicity and efficiency!

Containers are a solution to the problem of how to get the software to run when moved from one computing environment to another. Especially with Docker, as container solution, started a new DevOps trend. We, as software engineers, leverage this technology to ship our software to any environment.

In this post, I will show you how to create a simple Chrome extension, using just JavaScript, HTML and CSS. I will also summarize all what a Chrome extension can do, and I will introduce how to create more complex extensions based on modern JavaScript frameworks like React, Angular or Vue.

Writing tests is time consuming and can contain many repetitive tasks like setting up the specific configuration and cleaning the context after the test. To best follow the DRY (Don't Repeat Yourself) principle, I started implementing JUnit4 rules. In this blog post, I will show how I migrated a JUnit4 rule to JUnit5.

Today we are tackling a common problem in IT. You have data that contain unique ids. Many use cases in the Elastic Stack require additional data.