This video is still relevant: “AssertJ — Use It Now!” 🚀 If you write Java tests, this one’s for you. Learn how AssertJ can make your assertions cleaner, clearer, and more powerful. Watch now: youtu.be/qn4AMKTPpg8 #Java #Testing #AssertJ #CleanCode #DevTips

While it looks impressive and being in the top 1%, especially considering this is only the code I publish on GitHub, not the code I write for my clients, I have to admit I have a colleague. His name is Claude 😉

Why Java is the real production language for AI. Python is ideal for experiments, but enterprise AI needs predictable concurrency, type safety, and stable runtimes. Java already gives us that, plus native performance through ONNX Runtime and Project Panama. Read: buff.ly/0j6CZ8O #Java #AI #ONNX

The holiday card just arrived before the new year. Thank you @sharatchander.bsky.social Happy New Year!

The Hidden Performance Killer: Understanding Open Session in View in Spring Boot martinelli.ch/the-hidden-p...

🚀 Release announcement: vaadin-jOOQ-archetype 1.0.0 I just released version 1.0.0 of my Vaadin jOOQ Maven Archetype. It helps you bootstrap a modern Java full-stack application with: - Vaadin 25 - Spring Boot 4 - jOOQ Clean, production-ready defaults #keepitsimple

Spring Boot 4 finally has a dedicated OpenTelemetry starter. No more pulling in actuator just for observability. Metrics, traces, and logs via OTLP out of the box. youtu.be/6_Y41z7OIv8

The two MCP servers for jOOQ and Karibu Testing now use HTTP instead of SSE. Please update your configuration. If you encounter any problems, please let us know! Happy Holidays! 🎅

I like to explain the difference between vibecoding and spec-driven development with a cooking analogy. Cooking is vibecoding. You start with an idea, try things out, taste, and adjust. Baking is spec-driven development. You define everything upfront: ingredients, quantities, order, timing.

👾New on CyberJAR: What's New in JDK 26? Next feature release of #Java includes 10 JEPs, mostly with improvements to the features under development. Here's a laconic overview: www.youtube.com/watch?v=wtTd...

In the limited time spent with AI coding agents so far I would agree with this. I’ve got the most accurate and largest change sets into codebases that share both front end and backend. In my cases using SSR with Spring Boot and thymeleaf or j2html

I believe that with AI agents, separated frontend and backend development is slowly coming to an end. One language, one model, one flow. Less coordination, less friction, more focus on business logic. AI does not just change how we write code. It changes how we should structure our systems.

It’s actually the most efficient way to build web apps!

New article: The Human Outlook: Why "Empower the Team" Symbolizes Achievement in 2025 martinelli.ch/the-human-pe... #LeanSofwareDevelopment #Agile #KeepITsimple

I've improved the commands and started to add skills to my Claude Code plugin for AI Unified Process with Vaadin and jOOQ. Check it out: github.com/martinellich...

Vaadin 25 – Simpler and More Compatible Builds vaadin.com/blog/vaadin-...

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Yee-haw 🥳 That’s huge, I was accepted to speak at JavaOne next year again! Thanks a lot to the content team around @sharatchander.bsky.social #JavaOne

Great news 🚀 Your session Spec-driven Development: How AI Changed Everything (And Nothing) has been accepted for JChampions Conference 2026!

Note for the next livestream: Make sure the MCP server is working properly 🙄 You can find the recording of Spec-driven Testing with AI Unified Process here: www.youtube.com/watch?v=3ReL...

My webinar on Spec-driven Testing with the AI Unified Process will go live in 30 minutes. Topics to be covered include: - Browser-less testing for enhanced test coverage - Utilizing Playwright for E2E acceptance tests Looking forward to seeing you there! youtu.be/3ReLE_BD0oM

Join the webinar today at 4 pm CET on Spec-driven Testing with the AI Unified Process. Topics to be covered include: - Browser-less testing for enhanced test coverage - Utilizing Playwright for E2E acceptance tests Looking forward to seeing you there! www.youtube.com/watch?v=3ReL...

Nächsten Mittwoch, 3.12. spreche ich über Spec-driven Development bei der Java User Group Switzerland in Bern Kommt vorbei, ich freue mich auf euch! www.jug.ch/html/events/...

There's a new version 0.0.2 of my Vaadin/jOOQ Maven Archetype 🚀 Since the latest Docker Engine (version 29) requires Testcontainers 2.0.x, the plugin is no longer used, as it's not flexible enough and doesn't allow jOOQ Pro. Grab it while it's hot! github.com/martinellich...

I've created a Maven Archetype to create Vaadin applications that use jOOQ for the database access. github.com/martinellich...

Web UI with just #Java. Text field → Button → Grid — all in 30 seconds. No HTML. No JS. #Vaadin #WebDev #DX

Full-stack Development (Frontend and Backend combined) works best with AI. Because that way you can implement the whole use case at once!

I had a lot of fun at yesterday's webinar on Spec-driven Development. Therefore, there will be another webinar this time on Spec-driven Testing next Tuesday at 4:00 PM CET. We'll see how to test the Vaadin application from the first webinar. www.youtube.com/watch?v=3ReL...

Today and tomorrow, I'm giving a Vaadin workshop for a client team in Greece. Vaadin is the easiest way to build great web applications in Java. Interested? I do Vaadin workshops worldwide, either online or, upon request, on-site for your team. martinelli.ch/training/vaa...

In many cases YAML makes the Spring configuration files much longer than properties files. Additionally you cannot copy a single configuration line. I’ll be team properties file forever ✊

The first live stream on spec-driven development is already over. Thank you all so much for participating. For those who couldn't be there, you can find the recording here: www.youtube.com/watch?v=jwPB...

The idea of the internet was to have a decentralized network of computers. But what we have today is a network with big players like Microsoft, Google, Amazon, and Cloudflare. If one if these players fail, like Cloudflare currently, a large part of the internet fails. We should go back.

Reminder: Today at 4:00 PM CET, I'll be giving a live session on specification-driven development with AI-powered Unified Process. I look forward to your participation and am happy to answer any questions. www.youtube.com/watch?v=jwPB...

I created a new Vaadin AI starter that gives you a great starting point for building AI-powered apps. It includes: 💬 Streaming chat interface with Open AI 🔧 MCP support ☕ Java tool calling, local and REST → github.com/marcushellb...

As requested, I will do a live demo on how I use the AI Unified Process aiup.dev Join my live stream next week on Tuesday, November 18th, at 4 pm CET. Prepare your questions! www.youtube.com/watch?v=jwPB...

This morning, I had the pleasure of joining the Bootiful Podcast, hosted by @starbuxman.joshlong.com We were discussing jOOQ, Vaadin, Spring Data, and the Unified Process for AI. Thank you very much for having me, my friend 🙏 www.youtube.com/watch?v=EvzD...

Spring Framework 7.0 is now GA! Including Java 25 (with Java 17 baseline), Jakarta EE 11, JSpecify null-safety, Jackson 3.0, Kotlin 2.2, JUnit 6.0, plus programmatic bean registration, JmsClient, API versioning, HTTP Interface Client, RestTestClient & more: spring.io/blog/2025/11...

Hey look what just arrived 🚀 Congratulations @spring.io

Ich bin nächstes Jahr auch wieder dabei 🚀

🚀 Spring AI 1.1.0 GA Released 🔧 Better MCP Integration ... 🔐MCP OAuth2 server protection 🔄 Recursive Advisors ...📦 Developer Experience: ... Over 850+ commits Kudos to the entire Spring AI community! 🙌 Find more: spring.io/blog/2025/11... @spring-ai.bsky.social

Don't miss my new blog post in the Road to GA series to learn how the Spring team empowers Spring developers to make their Spring Boot 4 application null-safe, to reduce or remove the risk of NullPointerException and to solve "the billion dollar mistake"! spring.io/blog/2025/11... #spring #java

20 years ago, we moved from client/server applications to web applications. 10 years ago, we moved from web applications to single-page applications (SPAs). What many still don’t realize: SPAs are client/server applications again. Technology changes - the architecture patterns repeat.

Hi everyone! An ongoing reorganization at my current employer has prompted me to seek for a new role and would appreciate your support. I'm open to remote (anywhere) and hybrid roles in Switzerland. I have 25+ years experience as a software developer, 8 as devrel www.linkedin.com/posts/aalmir...

Be careful when using Spring Data: if you don't need the total number of elements, you shouldn't use `Page` as the return type. Spring Data performs two queries: one to count and one to fetch when Page is returned. Instead, you can use Slice. Example project: github.com/simasch/spri...

@martinelli.ch on why Vaadin works well with AI code generation: server-side Java keeps logic secure, strong typing catches AI mistakes at compile time, and single-language stack = no context switching. Worth a read 👇 martinelli.ch/why-vaadin-i...

I'd like to introduce you to: the Simon Martinelli stack: martinelli.ch/the-simon-ma...