iiinova — where your digital self keeps evolving

In general I've found that working with Gradle becomes a lot more pleasant (or, depending on your stance, bearable) with modern models to support it: I did a lot of restructuring with Opus already recently that I simply wouldn't have bothered with on my own. Esp. lazy configuration is a tricky topic

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Joris Kuipers @joris.kuipe.rs · 23h

Check out these new AI skills if you're using the Gradle build tool: blog.gradle.org/introducing-... I think the wrapper-update skill isn't all that useful, but the best-practices one is quite extensive and came up with some worthwhile improvements for my 100+ module build.

blog.gradle.org

Agent Skills for Gradle Best Practices and Wrapper Upgrades

Agentic Gradle Plugin 1.0.0 is available and includes skills for Gradle best practices and wrapper upgrades.

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Joris Kuipers @joris.kuipe.rs · 29/09/2026

I’ll see your American Confidence and raise you Dutch Courage

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Joris Kuipers @joris.kuipe.rs · 28/09/2026

TIL that Spring's RestClient does not automatically add an Accept header to its requests like RestTemplate does. We have migrated a lot of clients already, but only now encountered the first backend that compained about a missing Accept header.

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Joris Kuipers @joris.kuipe.rs · 25/09/2026

Well it's plain to see You were meant for me Yea I'm your toy Your 50yo midlife boy

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Joris Kuipers @joris.kuipe.rs · 22/09/2026

To avoid this from happening, Claude/Opus just wrote a nice javac plugin for me that recognizes this situation and turns it into a compile-time error. Very cool: I had the general idea, but going from there to working impl just took minutes now, while it would've taken me at least half a day.

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Joris Kuipers @joris.kuipe.rs · 22/09/2026

In the process of migrating a huge monorepo using 1000s of lines of code with Spring's RestTemplate to use RestClient. It's an easy mistake to leave an existing HttpEntity that was passed as the request to the template and now pass it to the RestClient's body() method: still compiles, but wrong.

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Joris Kuipers @joris.kuipe.rs · 15/09/2026

I would've thought GraalVM native compilation was unreliable enough as it is with all these OSS libraries needing 3rd party metadata, but apparently Oracle drops that data I contributed in new releases as well 😢 WHY, ORACLE, WHY???!!!! github.com/oracle/graal... Map$Entry[] is there though, WTF...

github.com

graalvm-reachability-metadata/metadata/org.thymeleaf/thymeleaf/3.1.5.RELEASE/reachability-metadata.json at master · oracle/graalvm-reachability-metadata

Repository which contains community-driven collection of GraalVM reachability metadata for open-source libraries. - oracle/graalvm-reachability-metadata

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Joris Kuipers @joris.kuipe.rs · 15/09/2026

Hah, Claude fixed it by reverting my old commit that registered standard Java types. I filed an issue against the Oracle reachability-metadata repo to have those added: github.com/oracle/graal... However, newer versions have dropped several entries, including java.util.Map$Entry which was failing.

github.com

graalvm-reachability-metadata/metadata/org.thymeleaf/thymeleaf/3.1.0.RELEASE/reachability-metadata.json at master · oracle/graalvm-reachability-metadata

Repository which contains community-driven collection of GraalVM reachability metadata for open-source libraries. - oracle/graalvm-reachability-metadata

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Joris Kuipers @joris.kuipe.rs · 15/09/2026

AI might kill us all, but let’s see if it can debug why my GraalVM build stopped working with Thymeleaf after updating from Boot 3.5 to 4.1.1 and then let’s see what I need to worry about first.

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Joris Kuipers @joris.kuipe.rs · 05/09/2026

Black Keys in Amsterdam tonight, with localized drums 🥁

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Joris Kuipers @joris.kuipe.rs · 02/09/2026

My presentation from this year’s Spring I/O conference is up on YouTube: if you’re using point-to-point messaging, make sure to check it out for some production-hardened ideas on how to handle dead-lettered messages for your applications and platforms! 📨🍃

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Reposted by Joris Kuipers

Wim Deblauwe @wimdeblauwe.com · 19/08/2026

📕 I just published my new book Crafting Spring Boot Starters, see www.wimdeblauwe.com/books/crafti... if you are interested! There is a free sample you can check out where you can read the foreword by Phil Webb. The full book also has a zip file with AI skills to audit your Spring Boot starter.

wimdeblauwe.com

Crafting Spring Boot Starters

Design, build, test and publish auto-configuration libraries on Spring Boot About the book ...

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Joris Kuipers @joris.kuipe.rs · 20/07/2026

Was expecting a little Andrew Tanenbaum figurine #disney #disappointed #ast

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Joris Kuipers @joris.kuipe.rs · 05/06/2026

So far just some minor issues to fix: some of our code relying on poor defaults in Jackson 2 (collection properties without setters, unmarshalling missing fields to primitive types) and missing that our auto-config referenced Boot config classes by name whose package has changed. Almost stable! 💪🍃

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Joris Kuipers @joris.kuipe.rs · 02/06/2026

Now let's see if this thing will deploy :) @spring.io Boot 4 / Framework 7 upgrade with Jackson 3 on 3 dozen microservices

GitLab merge request showing Spring Boot 4 upgrade of big project with 400+ files changed

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Joris Kuipers @joris.kuipe.rs · 01/06/2026

Exactly. I need to do load testing for determining new memory baselines anyway, I’ll probably have to add something like such a filter then as well.

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Joris Kuipers @joris.kuipe.rs · 30/05/2026

I’m worried that by enabling virtual threads, my services will handle more and more requests when downstream systems become slow until they run out of memory hanging on to request/response related data. Even with virtual threads I’d still expect a way to throttle.

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Joris Kuipers @joris.kuipe.rs · 30/05/2026

Don’t think so, and even then: that should use virtual threads. I’d rather expect a way to restrict the nr of concurrent requests (not connections) in Tomcat with virtual threads, but haven’t seen anything for that.

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Joris Kuipers @joris.kuipe.rs · 29/05/2026

No one doing this already? Is using virtual threads in production really pioneering?

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Joris Kuipers @joris.kuipe.rs · 29/05/2026

More beers should come with a playlist

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Joris Kuipers @joris.kuipe.rs · 29/05/2026

If you think Europe’s GDPR is a bitch, read what & how the American government is actually collecting on its citizens and then we can talk again.

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Reposted by Joris Kuipers

Thomas Vitale ☀️ @thomasvitale.com · 20/05/2026

It was really exciting to officially introduce Arconia at Spring I/O last month. Open-source extension improving the developer experience on Spring Boot. I talked about dev services, observability, automated migrations, agent skills, and a sneak peek at the upcoming dev UI. @arconia.io

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Joris Kuipers @joris.kuipe.rs · 14/05/2026

Interview met Left Laser al gezien? www.instagram.com/reel/DYSkU_u... Deze man is een gevaar voor de rechtsstaat.

instagram.com

Instagram

Create an account or log in to Instagram - Share what you're into with the people who get you.

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Joris Kuipers @joris.kuipe.rs · 08/05/2026

Planning to use virtual threads with Spring Boot. Means server.tomcat.max-threads will be ignored and server.tomcat.max-connections will effectively determine concurrency, but that's for capping open connections, not actively handled requests. Should I add a semaphore to control concurrency myself?

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Joris Kuipers @joris.kuipe.rs · 30/04/2026

Sanity restored, but as I mentioned already: if minor upgrades can make arbitrary dependencies fail silently and you have to detect and fix this yourself for 3rd party components, how can you expect mass adoption?

Code snippet showing resource hint registration for Logback version properties files

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Joris Kuipers @joris.kuipe.rs · 30/04/2026

Looks like multiple issues. An <include> started failing silently, even after adding a resource hint, but after "fixing" that by inlining the resource I still get this new warning: |-WARN in ch.qos.logback.classic.LoggerContext[default] - Versions of logback-classic and ? are different or unknown.

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Joris Kuipers @joris.kuipe.rs · 30/04/2026

Just silently broke my Logback-based logging when updating a GraalVM natively compiled Spring Boot app from 3.5.8 to 3.5.14. Goes to show that this is still really tricky to use and not really ready for mass enterprise adoption, as far as I'm concerned.

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Joris Kuipers @joris.kuipe.rs · 28/04/2026

No better way to get over your King’s Day hangover than some Belgian beer & boogie with Triggerfinger in Paradiso 🎸

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Reposted by Joris Kuipers

Yuriy @yuriy-artamonov.bsky.social · 25/04/2026

Want fewer freezes and bugs in your IntelliJ IDEA? Help us — enable automatic error reporting: Appearance & Behavior → System Settings → Data Sharing → Send error reports automatically Every report helps prioritize fixes. Takes 10 seconds, makes a real difference! #ide #java

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Joris Kuipers @joris.kuipe.rs · 20/04/2026

Can’t wait to find out how you have to injure yourself first to get *that* to happen 🙈

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Joris Kuipers @joris.kuipe.rs · 18/04/2026

Will do! Was thinking about helping to get the cmd line client for Windows in something like Chocolatey for easy installation and updating

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Joris Kuipers @joris.kuipe.rs · 17/04/2026

Second time I’ll watch this band which I’d never thought I’d be able to see live some years ago!

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Joris Kuipers @joris.kuipe.rs · 16/04/2026

Also, never thought I’d sided with the pope on anything, yet here we are

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Joris Kuipers @joris.kuipe.rs · 16/04/2026

I just don’t want to actively contribute anymore. I do still read my X feed and there’s a ton of quality content on it: so I also turned into a passive consumer, indeed

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Joris Kuipers @joris.kuipe.rs · 16/04/2026

True, it’s a self-sustaining phenomenon: everybody is on X, so everyone stays on X. Makes sense, but you’re choosing to be on a platform that’s actively pushing extremist right-wing propaganda and suppresses dissenting users (as demonstrated by the article I linked to). I just can’t do that anymore

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Joris Kuipers @joris.kuipe.rs · 15/04/2026

Leaving Barcelona after another great @springio.net edition. Glad that I could speak again, very happy to have reconnected with so many people and hope to be at #springio27 that will take place in Valencia! 😎 Thanks to @sergialmar.com and everyone else who made this happen 🙏 #springio26

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Joris Kuipers @joris.kuipe.rs · 15/04/2026

Watching @thomasvitale.com explain his Arconia framework for @spring.io development: very cool, will definitely give this a try. Community hero! 🦸‍♂️ #springio26

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Joris Kuipers @joris.kuipe.rs · 14/04/2026

Google Maps combined with Barcelona public transport really makes it easy to get around. Hadn’t used Maps for this much yet, but have to admit that I’m impressed with the experience #springio26

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Joris Kuipers @joris.kuipe.rs · 14/04/2026

Home is where the wifi autoconnects: #springio26 may be in a new location, but phone already feels right at home

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Joris Kuipers @joris.kuipe.rs · 13/04/2026

Starting my trip to Barcelona for @springio.net, really looking forward to reconnecting with everyone! If you’re attending: I will be speaking on DLQ management for large scale systems on Wednesday, so consider to join me 2026.springio.net/sessions/fal...

2026.springio.net

Spring I/O • 13-15 • April • Barcelona 2026

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