Clean Code from the Trenches – Writing Executable Specifications with JUnit 5, Mockito, and AssertJ

Executable Specifications are tests that can also serve as design specifications. They enable technical and business teams to get on…

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A Beginner-friendly Introduction to Kubernetes for Developers: What is Kubernetes?

Just a few months ago, I had the chance to get my hands dirty with Kubernetes for the very first…

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Different States of Java Threads

Introduction In Java, threads can have States. The Thread.State enum defines the different states that a Java thread can have.…

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A brief overview of the Fork/Join Framework in Java

Introduction The Fork/Join framework is a framework to solve a problem using a concurrent divide-and-conquer approach. They were introduced to…

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Java Tips: Creating a Monitoring-friendly ExecutorService

In this article we will be extending an ExecutorService implementation with monitoring capabilities. This monitoring capability will help us to measure…

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JPA Tips: Avoiding the N + 1 select problem

Introduction ORM frameworks like JPA simplifies our development process by helping us to avoid lots of boilerplate code during the…

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Replacing exceptions with error notifications during input validation in Java

In my previous article I wrote about an input validation design which replaces hard-to-maintain-and-test if-else blocks. However, as some readers pointed…

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Clean Code from the trenches

Clean Code from the trenches – Validation Let’s directly start with an example. Consider a simple web service which allows…

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Dealing with Java’s LocalDateTime in JPA

A few days ago I ran into a problem while dealing with a LocalDateTime attribute in JPA. In this blog post…

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