Lightnews — Scholar-powered news

Sébastien Deleuze @seb.deleuze.fr · 1d

You are wondering if #Spring could run in a #WebAssembly engine like the one in your browser? The GraalVM team did it with Web Image.

You don't believe me? Check the related demo graalvm.github.io/graalvm-demo... and the Devoxx talk www.youtube.com/watch?v=uefc... !

Spring Shell on WebAssembly

graalvm.github.io

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Reposted by Sébastien Deleuze

Stéphane Nicoll @snicoll.be · 4d

The talk Brian Clozel and I gave at #Devoxx is already online.

Always great to share the stage with Brian. We covered what’s next for Spring Boot: API versioning, resiliency, OpenTelemetry, structured concurrency, and more.

Watch here: www.youtube.com/watch?v=4NQC...

#Java #SpringBoot

Spring Boot: Chapter 4 by Brian Clozel, Stephane Nicoll

YouTube video by Devoxx

www.youtube.com

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Reposted by Sébastien Deleuze

Thomas Wuerthinger @thomaswue.dev · 5d

Recording of my talk at @devoxx.com 2025 with @starbuxman.joshlong.com is now online! Watch for 50 minutes live (pair)coding entertainment showing GraalVM performance 🚀 for Spring apps, how you can mix in Python 🐍, and some more crazy demos 👀. Let me know your comments! m.youtube.com/watch?v=YlMi...

Bootiful GraalVM by Thomas Wuerthinger, Josh Long

YouTube video by Devoxx

m.youtube.com

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Reposted by Sébastien Deleuze

Cowtown Coder @cowtowncoder.bsky.social · 4d

I blogged again: cowtowncoder.medium.com/jackson-3-0-...

Jackson 3.0.0 (GA) released

(October 3, 2025)

cowtowncoder.medium.com

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Reposted by Sébastien Deleuze

Moritz Halbritter @0.5ritter.de · 5d

And the recording is now here, too: www.youtube.com/watch?v=h16n...

Supercharge your JVM performance with Project Leyden and Spring Boot by Moritz Halbritter, Ana Maria

YouTube video by Devoxx

www.youtube.com

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Reposted by Sébastien Deleuze

Ana-Maria Mihalceanu @ammbra1508.bsky.social · 6d

Thank you to everyone who joined our session on boosting Java performance with Project Leyden, Java 25, and Spring Boot! 🚀

@0.5ritter.de and I hope that you will apply the optimizations and tips we shared today. The slides we used:
www.slideshare.net/slideshow/su...

#JDK25 #SpringBoot #Performance

Supercharge your JVM performance with Project Leyden and Spring Boot

Many modern applications and tools rely on Java. Yet, their startup time and time-to-peak performance remain challenging, especially for microservices and Kubernetes workloads that require fast scaling and responsiveness. Project Leyden, an ambitious OpenJDK initiative, aims to overcome these performance bottlenecks. In this session, Ana and Moritz showed how you can take advantage of Leyden’s optimizations using Java 25 and Spring Boot. You also got practical techniques you can apply today, along with a peek into the ongoing work inside Leyden and what that means for the performance of your Java application. - Download as a PDF or view online for free

www.slideshare.net

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Reposted by Sébastien Deleuze

Stéphane Nicoll @snicoll.be · 7d

A long spring, 3 core qualities.

@poutsma.bsky.social at #Devoxx

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Reposted by Sébastien Deleuze

JauntyWunderKind @jauntywk.bsky.social · 7d

radically cool work going on with wasm wasip3+ getting initial push towards host/green threading, by @tartanllama.xyz. way above my head but obviously freaking awesome.
github.com/bytecodealli...

Cooperative Multithreading by TartanLlama · Pull Request #11751 · bytecodealliance/wasmtime

Implements WebAssembly/component-model#557 Submitting as a draft PR for now to share progress. Pass through all new builtins Basic implementations of new builtins Cancellation support Support ...

github.com

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Sébastien Deleuze @seb.deleuze.fr · 8d

I have just published "Introducing Jackson 3 support in Spring" with hopefully useful insights on Spring Boot 4 upcoming JSON support and on the migration from Jackson 2. spring.io/blog/2025/10...

Introducing Jackson 3 support in Spring

Level up your Java code and explore what Spring can do for you.

spring.io

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Reposted by Sébastien Deleuze

Sam Brannen @sambrannen.com · 11d

🍃 ICYMI, #SpringFramework 7.0 and #SpringBoot 4.0 will have a #JUnit Jupiter 6.0 baseline! 🚀

github.com/spring-proje...

github.com/spring-proje...

Upgrade to JUnit 6 · Issue #35124 · spring-projects/spring-framework

Overview Since JUnit 6.0 M1 has been released, we should start running our test suite using JUnit 6 for the following reasons. We want to ensure that our own test suite works with JUnit 6 in Gradle...

github.com

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Reposted by Sébastien Deleuze

Oliver Drotbohm @odrotbohm.de · 11d

Thu, Oct 9th, 5:40pm – Meet the Spring Team – m.devoxx.com/events/dvbe2...

With @starbuxman.joshlong.com, @garnier.wf, @tzolov.bsky.social, @0.5ritter.de, @snicoll.be, @chemicl.bsky.social, Brian Clozel, and yours truly. ☕️🍃 5/5

Meet the Spring Team

Come meet the Spring team! This year at Devoxx, many maintainers, advocates and contributors will be at the conference, and we’re delighted to meet with our users and members of the community. In this “open mic” session, you’ll have the opportunity to ask us anything about the various Spring projects, our current efforts and ideas for the future, and of course, the soon-to-be-released new generation with Boot 4 and Framework 7.

Whether you’re a Spring veteran or a new user getting started with the project, you are more than welcome to join.

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Reposted by Sébastien Deleuze

Cowtown Coder @cowtowncoder.bsky.social · 11d

Jackson 3.0.0 (GA) release now starting!

github.com/FasterXML/ja...

#java #json #xml #csv #cbor #csv

Jackson Release 3.0

Main Portal page for the Jackson project. Contribute to FasterXML/jackson development by creating an account on GitHub.

github.com

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Reposted by Sébastien Deleuze

Cowtown Coder @cowtowncoder.bsky.social · 13d

Ok, thanks to nudging by people I respect a lot (& help by the same), I got into some Last Minute Documentation Work -> github.com/FasterXML/ja...

help would be appreciated (like, prs etc) before I go out and push Jackson 3.0.0 GA sometime this week.

github.com

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Reposted by Sébastien Deleuze

JUnit Team 💙💛 @junit.org · 15d

#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...

JUnit Release Notes

docs.junit.org

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Sébastien Deleuze @seb.deleuze.fr · 15d

Highly-recommended reading: The state of HTTP clients in Spring by Brian Clozel spring.io/blog/2025/09...

« This is also a good time to reflect on the state of HTTP clients in Spring, so we will use this opportunity to explain an important announcement: we are officially deprecating RestTemplate. »

The state of HTTP clients in Spring

Level up your Java code and explore what Spring can do for you.

spring.io

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Reposted by Sébastien Deleuze

Thomas Steiner @tomayac.com · 15d

📢 New #WasmAssembly podcast episode: CG, WG, W3C, Lively — #Wasm standardization with Thomas Lively!

We talk about Thomas' role as co-chair of the #WebAssembly Community Group at the W3C and the two proposals he champions.

🍿 www.youtube.com/watch?v=MDGq...
🎧 wasmassembly.libsyn.com/cg-wg-w3c-li...

CG, WG, W3C, Lively—Wasm standardization with Thomas Lively - WasmAssembly

YouTube video by Chrome for Developers

www.youtube.com

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Reposted by Sébastien Deleuze

Sergi Almar @sergialmar.com · 16d

The @springio.net 2026 website is coming along nicely and CFP will open soon.

What topics would you love to see at #springio26? 👇

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Sébastien Deleuze @seb.deleuze.fr · 16d

Pointe du Raz, Bretagne

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Reposted by Sébastien Deleuze

Michael Simons @rotnroll666.bsky.social · 19d

Enjoy my new, artisanal blog post about #JSpecify and #NullAway, a fresh take on null safety in the #Java world. Be warned, may contains #Lombok. Happy weekend you all.

info.michael-simons.eu/2025/09/26/j...

JSpecify and NullAway: A fresh take on nullsafety in the Java world

Introduction Sir Antony Hoare[1] introduced the concept of Null-references or Null pointer[2] back in 1965 with the release of ALGOL W. In 2009 he spoke about it as his “Billion Dollar Mistake”[3]. De...

info.michael-simons.eu

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Sébastien Deleuze @seb.deleuze.fr · 18d

Presqu’île de Crozon, Bretagne

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Sébastien Deleuze @seb.deleuze.fr · 19d

Stable Values -> Lazy Constants

JEP Tracker @jeptracker.bsky.social · 19d

🎓 JEP 526 moved to candidate
Title: Lazy Constants (Second Preview)
Type: feature
Component: core / lang
See openjdk.org/jeps/526

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Sébastien Deleuze @seb.deleuze.fr · 20d

Rendez-vous ce soir à Grenoble!

Alpes JUG @alpesjug.bsky.social · Aug 26

#SpringBoot 2025 : NullSafety et Optimisations www.meetup.com/alpesjug/eve... avec @seb.deleuze.fr Jeudi 25/09/2025

SpringBoot 2025 : NullSafety et Optimisations, Thu, Sep 25, 2025, 7:00 PM | Meetup

**Null Safety en Java avec JSpecify et NullAway** JSpecify est un ensemble d’annotations, de spécifications et de documentations permettant une vérification de la "null sa

www.meetup.com

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Reposted by Sébastien Deleuze

rstoyanchev.bsky.social @rstoyanchev.bsky.social · 22d

The next instalment of the Road to GA series about a cross-project, collaborative effort on new capabilities for HTTP service clients is now live spring.io/blog/2025/09...

#SpringFramework #SpringBoot #SpringCloud #SpringSecurity

HTTP Service Client Enhancements

Level up your Java code and explore what Spring can do for you.

spring.io

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Reposted by Sébastien Deleuze

Cowtown Coder @cowtowncoder.bsky.social · 25d

One last (?) Jackson 3.0.0 RC build -- 3.0.0-rc10 -- github.com/FasterXML/ja... going out. Last minute testing needed!!!

Jackson Release 3.0

Main Portal page for the Jackson project. Contribute to FasterXML/jackson development by creating an account on GitHub.

github.com

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