Gunter Rotsaert

In October 2026, I visited Devoxx Belgium and again it was an awesome event! I learned a lot and received quite some information which I do not want to withhold from you. In this blog, you can find my takeaways of Devoxx Belgium 2026! #java #devoxx mydeveloperplanet.com/2026/10/21/t...

The 16th of September 2025, Java 25 was released. Time to take a closer look at the changes since the last LTS release, which is Java 21. In this blog, some of the changes between Java 21 and Java 25 are highlighted, mainly by means of examples. #java

A long descriptive name is better than a short enigmatic name. A long descriptive name is better than a long descriptive comment. - Robert C. Martin #quotes #quoteoftheday

The Desktop Don Reference. https://donraab.medium.com/the-desktop-don-reference-5e3299df50d8

Google Notebook LM is a powerful AI tool for interacting with your documents. However, privacy concerns might prevent you uploading sensitive data to Notebook LM. There is an open source alternative by means of Open Notebook.

Nice read 👇🏻

Spring Academy - Unlock your full potential with Spring courses from the Spring team. https://spring.academy/

You create an MCP server, but how can you test whether it works as expected? In this blog, you will learn how you can test and debug MCP servers by using MCP Inspector. Enjoy! #mcp

Redundant comments are just places to collect lies and misinformation. - Robert C. Martin #quotes #quoteoftheday

Validation with Spring Boot - the Complete Guide.

MCP servers extend the functionality of an LLM. Inference engines allow you to define the MCP servers, but often you will need to write an MCP client yourself. In this blog, you will learn how to do so using Spring AI. Enjoy! #java #MCP

Testing Java Applications Made Simple.

In this blog, you will learn how to create a Model Context Protocol (MCP) server using Spring AI. You will see with how little effort you can create your own MCP server. Enjoy! #java #springai

Truth can only be found in one place: the code. - Robert C. Martin #quotes #quoteoftheday

An Illustrated Guide to OAuth and OpenID Connect

In October 2025, I visited Devoxx Belgium and again it was an awesome event! I learned a lot and received quite some information which I do not want to withhold from you. In this blog, you can find my takeaways of Devoxx Belgium 2025! #java

OWASP Top Ten: Top 10 Web Application Security Risks

In this blog, you will explore some AI MCP agents which will enhance your AI coding assistant workflow. The goal is to expand the capabilities of an LLM with shell commands, browser interaction and update-to-date library information. Enjoy! #java #mcp

A software architect is a programmer; and continues to be a programmer. Never fall for the lie that suggests that software architects pull back from code to focus on higher-level issues. - Robert C. Martin #quotes #quoteoftheday

Spring Security OAuth 2 Tutorial - 1 : Getting familiar with OAuth 2 concepts https://www.sivalabs.in/spring-security-oauth2-tutorial-introduction/

Are you interested in adding AI agents to your coding workflow? In this blog, you will learn what MCP agents are and how you can integrate these in your coding workflow. DevoxxGenie, an IntelliJ plugin, will be used. #java #AI

SKF is a fully open-source Python-Flask / Angular web-application that uses many other great open source projects to train you and your team in building secure applications, by design. https://securityknowledgeframework.org/

In this blog, you will take a closer look at Spring Security. More specifically Spring Security in combination with Keycloak using OpenID Connect. All supported by means of examples and unit tests. Enjoy! #java #springboot

I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times. - Bruce Lee #quotes #quoteoftheday

Sign. verify. protect. Making sure your software is what it claims to be.

In this blog, you will learn how to set up the OpenID Connect Authorization Code Flow using Keycloak. You will execute the flow yourself in order to get a better understanding of OIDC. Enjoy! #security #oidc

Measuring Developer Productivity via Humans.

In your unit integration tests, you want to mock another system's behaviour. WireMock is a testing library which helps you with mocking the APIs you depend on. In this blog, you will explore WireMock for testing a Spring Boot application. Enjoy! #Java

Computers are good at following instructions, but not at reading your mind. - Donald Knuth #quotes #quoteoftheday

My blog "OpenCode: Setting Up an Open-Source AI Coding Assistant" now published @DZoneInc dzone.com/articles/ope...

Measuring developer productivity? A response to McKinsey.

You create a well-defined architecture, but how do you enforce this architecture in your code? With ArchUnit you can define rules for your architecture by means of unit tests. #Java

Story Points Revisited. By Ron Jeffries. https://ronjeffries.com/articles/019-01ff/story-points/Index.html#

In this part of this series, you will try to create unit tests for a Spring Boot application using an AI coding assistant. The goal is not to just merely create working unit tests, but to create qualitative unit tests. Enjoy! #java #ai

"Ask a programmer to review ten lines of code, he'll find ten issues. Ask him to do five hundred lines, and he'll say it looks good." - Gene Kim #quotes #quoteoftheday

Jason Yip's critique of "the Spotify Model": Part 1. By Jason Yip. https://jchyip.medium.com/my-critique-of-the-spotify-model-part-1-197d335ef7af

In this part of this series, you will try to create a Spring Boot application from scratch using an AI coding assistant. The goal is not to just merely create a working application, but to create production-grade code. Enjoy! #java #ai

The New Methodology. By Martin Fowler.

Do you think AI coding assistants are not working for you? You constantly get wrong responses and now you have given up using them? In this third part, some real life use cases are shown which will help you during your daily work.

There are only two hard things in Computer Science: cache invalidation and naming things. - Phil Karlton #quotes #quoteoftheday

What are the techniques set by the Scrum guidelines for a task estimation in sprint planning? https://www.quora.com/What-are-the-techniques-set-by-the-Scrum-guidelines-for-a-task-estimation-in-sprint-planning-Are-there-any-limitations-to-these-techniques/answer/Jeff-Sutherland-10?srid=1yyk

Do you think AI coding assistants are not working for you? You constantly get wrong responses and now you have given up using them? In this second part, some real life use cases are shown which will help you during your daily work.

The three-point estimation technique is used in management and information systems applications for the construction of an approximate probability distribution representing the outcome of future events, based on very limited information. https://en.wikipedia.org/wiki/Three-point_estimation

Missed my talk at Devoxx? You can catch it here! 🎤 Give it a watch and let me know what you think 👇 www.youtube.com/watch?v=asAx... #Devoxx

Do you think AI coding assistants are not working for you? You constantly get wrong responses and now you have given up using them? In this blog, some real life use cases are shown which will help you during your daily work.

Don't be afraid to fail. Be afraid not to try. - Michael Jordan #quotes #quoteoftheday

InnerSource Commons is the world's largest community of InnerSource practitioners. It is dedicated to creating and sharing knowledge about InnerSource, the use of open source best practices for software development within the confines of an organization.

Are you looking for a user-friendly, self-hosted AI interface designed to operate entirely offline? Look no further, Open WebUI might be what you are looking for. In this blog, you will dive into some nice features of Open WebUI. Enjoy!

Exploring the Scaled Agile Framework (SAFe) - A Balanced Perspective.

In this blog, you will learn how to implement Retrieval Augmented Generation (RAG) using PGVector, LangChain4j and Ollama. This implementation allows you to ask questions about your documents using natural language. #java #langchain4j