#JUnit 6.0.0 is released! ✨ Java 17 and Kotlin 2.2 baseline 🌄 JSpecify nullability annotations 🛫 Integrated JFR support 🚟 Kotlin suspend function support 🛑 Support for cancelling test execution ⏭️ New `--fail-fast` mode for ConsoleLauncher 🧹 Removal of deprecated APIs docs.junit.org/6.0.0/releas...

Honored to have been chosen as @sessionize.com Speaker of the Day!

Containers don’t save you from a distributed monolith.

OH: headless is overhead

Preparing a talk means spending 80% of the time thinking about what to talk about and the remaining 80% of the time creating the slides.

Our next #JCON2025 session is live: 'Unit Test Your #Java Architecture With #ArchUnit' with Roland Weisleder #Architecture and #code are drifting more and more apart? The implementation of non-functional requirements and cross-cutting concerns… Grab your coffee and hit play: youtu.be/MxP521_i9zM

#ChatGPT answering with "If you want I can..." and "Would you like me to..." is like an excited child saying "Look what I can do!"

Clean code starts with an appropriate data structure.

There's a great talk by @rweisleder.de abiut ArchUnit fyi

That moment 2 weeks before go-live when the client finally connects their frontend, built over 6 months, and the data model doesn’t match our API at all

#JavaForumNord 2025 - Roland Weisleder - Freiberufler - Architecture as Code in Practice- javaforumnord.de

And here I am, sitting on a friday afternoon, trying to fix an integration test that tests the interaction of mock objects based on false assumptions instead of testing the real system

*opens new Java legacy project* *opens random POJO* *sighs deeply*

Something that annoyed me when viewing test results in IntelliJ: it indeed shows the execution time for each test method, but not how long it took for example to start @SpringBootTest. Today I discovered "Use Wall Time".

New blog post published: Java Regex: Dynamic Replacements with Lambda Expressions blog.rweisleder.de/posts/java-r...

OH: Comedy Admin (instead of Company Admin)

The reward for good work is more work.

OH: "andere Firmen haben auch schöne Software"

NullPointerExceptions are in fact just a love letter from Java to us developers. Brought to us by @intellijidea.com #Java30WithIntelliJIDEA

This looks just right: I am Shift+Shift Duke. #Java30WithIntelliJIDEA www.jetbrains.com/lp/java-30/d...

Checked my inbox... "Your session Architecture as Code in Practice has been accepted for Java Forum Nord 2025!" See you in Hannover @javaforumnord.bsky.social!

Fellow Java developers, if you're looking for a library or framework for your task, check out this repo: github.com/akullpp/awes... Looking at the diversity, you can already see that #Java is awesome!

New blog post: blog.rweisleder.de/posts/java-r...

*taps the sign*

Thanks for the great feedback (although only one person gave feedback) for my talk about #ArchUnit. People at #JCON, don't forget to give feedback!

Already have to leave #JCON. See you next year hopefully.

People at #JCON, at 14:30 you have several interesting options. But if you want to see how you can untangle your spaghetti code and if fixing failing tests on a big cinema screen is interesting to you, then attend my talk at cinema 5.

Good morning #JCON #JCON2025

Enough running for today... Had to change train in Düsseldorf, app says: platform 20, in 5 minutes, so better run On platform 20: it's platform 16, in 2 minutes 10 minutes no information and no train It's platform 20 again, but in reversed order Oh it's platform 16 again, in right order. Now!

On my way to Cologne for @jcon.one. Looking forward to days full of Java, great conversations, the Mentoring Hub, and my talk about ArchUnit on Tuesday. See you later today! #JCON2025

Did you also made this mistake before? 👇 Then take a look at the new release of archunit-spring! There you will find a new rule that detects such issues at build time. github.com/rweisleder/a...

🚀 Release of archunit-spring v1.2.0 The release mainly contains new rules and improvements for Spring Framework. Check it out on GitHub: github.com/rweisleder/a... If you use it and find it helpful, I’d love to hear your feedback! #ArchUnit #Spring #SpringBoot

DDD - Deadline Driven Development

If a code generator says "enterprise-grade code quality", is that a good or bad thing?

As a bank customer I want to be notified one hour after a failed contactless card payment So that I ... know that I did the right thing by inserting the card without getting distracted by an instant notification I wouldn't read anyhow? Or what was the user story for this notification?

@jcon.one Looks like you should visit a Java conference to learn how to avoid NullPointerExceptions 😜

I've been regularly debugging Java code with exceptions using IntelliJ for years, and TIL that I've missed the “Create breakpoint” link every time... Thanks for the write up, @maritvandijk.bsky.social!

Just submitted a new talk to JUG Saxony Day, Java Forum Nord, and Berlin Expert Days. 🤞 All of them are great conferences in Germany organized by local Java User Groups. Not submitted yet? Then hurry up!

A @kevlin.bsky.social in Berlin saying "Train service is interrupted due to computer restart" via blog.fefe.de?ts=99090c94

One thing I have to re-read almost every day recently: for regular expressions the syntax for [positive|negative] look-[ahead|behind] assertions. Still haven't memorized this after weeks in my regex project...

Frankensystem: When your system, which was intended as an experiment made up of individual parts that were lying around patched together, suddenly comes to life

This is the moment you've all been waiting for... 🥁 #JUnit Jupiter support for @⁠ParameterizedClass as a companion to the existing @⁠ParameterizedTest support! 🚀 @marcphilipp.de has put a lot of work into this, and we're eager for you to try it out and provide feedback!!!

Excited for #JCON EUROPE 2025? See Roland Weißleder at #JCON2025 in Cologne talking about 'Unit Test Your #Java #Architecture With #ArchUnit' Architecture and #code are drifting more and more apart? The implementation … Get your free #JUG Ticket: www.jcon.one

@maritvandijk.bsky.social Are you by chance aware of a Maven configuration that processes code annotated with JetBrains' @NotNull annotation, just as the IntelliJ compiler does with "add runtime assertions for notnull-annotated methods and parameters"?

That's great stuff! I would have needed this some time ago in a few projects to write easily understandable code.

Thanks to @rweisleder.de, soon we won’t have to worry about making this mistake since ArchUnit Spring would catch it at build time 🚀 github.com/rweisleder/a...

🚀 Release of archunit-spring v1.1.0 The release mainly contains new rules and improvements for Spring Framework and Spring Retry. Check it out on GitHub: github.com/rweisleder/a... If you use it and find it helpful, I’d love to hear your feedback! #ArchUnit #Spring #SpringBoot

🚀 Release of archunit-spring v1.1.0 The release mainly contains new rules and improvements for Spring Framework and Spring Retry. Check it out on GitHub: github.com/rweisleder/a... If you use it and find it helpful, I’d love to hear your feedback! #ArchUnit #Spring #SpringBoot

When I write a complex piece of code, I force myself to document. If I can't do that, it typically means I don't understand it yet. Once you have a clear view of what you are doing and why, it is much easier to document it. So it's a good thing to do, I guess. Even if nobody reads it.

I guess my students have learned how projects really work: A perfect plan is useless if you realize too late that the real work is still ahead.