New tutorial on The Main Thread!
Ever had a demo break because an internal API changed overnight?
Yeah… me too.
Today’s article shows how to build Stripe-style API versioning in Quarkus — using date-based versions, adapters, and a clean canonical model.
Perfect for Java devs who want zero-breakage API evolution.
👉 https://www.the-main-thread.com/p/quarkus-stripe-api-versioning-adapter-java-tutorial
#Java #Quarkus #API #Versioning #Stripe #JavaDev #CloudNative
RT @myfear: You're only using half of #Quarkus. Ten hidden features that change everything 😉
https://open.substack.com/pub/myfear/p/hidden-quarkus-features-java-developers?r=17bggb&utm_medium=ios
#Java …
New tutorial: build infinite nested comment threads in #Quarkus using #PostgreSQL recursive CTEs + #JakartaData.
No N+1 queries. One SQL call. Clean tree reconstruction.
🔗 https://www.the-main-thread.com/p/quarkus-recursive-comments-postgresql-cte-tutorial
Mon calendrier de l’avent – jour 8
Cette année, j’ai beaucoup bossé sur un projet bien complexe permettant de récupérer et d’afficher des métriques de popularité pour des projets open-source. Une partie de ce projet (l’acquisition de mesures) est open-source : tech-lab-ingester. Et cette partie a été réécrite … trois fois. J’avais commencé avec JBang – mais ça n’est pas le sujet du jour, avant de le réécrire sous forme de modules maven. Dans les deux cas, la complexité expliquait très vite, alors même que je n’observais pas beaucoup de projets. Tout s’est arrangé quand je suis passé à camel-quarkus. Et là, j’en vois qui font les gros yeux, et je ne vais pas les détromper : camel est une solution lourde, adaptée à des gros flux de données, et dont les choix d’implémentation permettant l’adoption des enterprise integration patterns font aujourd’hui (pour moi au moins) grincer des dents. Je pense en particulier au choix d’utiliser un DSL bizarre là où les lambdas Java 8 semblent permettre les mêmes capacités.
Mais quarkus … Quarkus … Quel génie dans ce framework ! En fait, j’avais déja vu un paquet de conférences sur Quarkus. Et j’étais bien conscient des qualités théoriques du truc. Mais je dois avouer que mes premiers jours d’usage ont été marqués par … un abandon total des tests unitaires, simplement parce que le dev mode permet une rapidité d’itération incroyable. Et comme en plus Quarkus intègre à peu près tout l’écosystème Java, grâce à la richesse des contributions qui y ont été faites, il y a très peu de connexions ou de problèmes que je n’ai pas réussi à mettre en place rapidement. En fait, je me rends compte que je pourrais en parler pendant des heures, parce que la proposition de valeur est effectivement très différente de celle de Spring (et à mon avis bien plus productive).
Pour tout dire, et sans doute parce que je développe quand même régulièrement des logiciels en Java, Quarkus a suffisamment transformé ma vision de cet écosystème pour devenir ma base naturelle quelque soit le développement que j’envisage.
⏰ Starting soon! Join us for Quarkus Insights Ep. #229 as Guillaume Smet and Georgios Andrianakis discuss the hard won lessons in the 6 years of developing Quarkus. Gain valuable insights into how and why important decisions were made when developing Quarkus, with the hope of helping you avoid our mistakes and leverage what we got right.
Just published a new deep-dive on building your own Quarkus Actuator extension.
If you’ve ever wondered how Quarkus extensions work under the hood — build steps, recorders, native resources, runtime beans — this guide walks through everything with real code.
A practical path from idea → extension → /actuator/info.
🔗 https://www.the-main-thread.com/p/quarkus-actuator-extension-java-tutorial
Reactive systems, microservices, & #DevOps pipelines demand faster delivery. Holger Tiemeyer outlines how #Quarkus shifts heavy JVM tasks to build time—resulting in millisecond startups & lean containers. Curious?
@QuarkusIO @redhat #Kubernetes
New tutorial on The Main Thread!
I built a privacy-safe Image Metadata Stripper using Quarkus + Apache Commons Imaging.
Learn how to remove EXIF (GPS, camera model, timestamps), handle multipart uploads, and return clean images.
Pure Java. No native libs.
https://www.the-main-thread.com/p/quarkus-image-metadata-stripper-exif-removal-tutorial
New post on The Main Thread 🧵
Time zones are one of the most common sources of silent data corruption in enterprise systems.
With Quarkus 3.28+ and Hibernate 7, we finally get native offset-preserving OffsetDateTime mapping.
In this tutorial, I show how to:
- Persist timestamps with original offsets
- Use @TimeZoneStorage + @TimeZoneColumn
- Avoid breaking global scheduling & audits
Read:
https://www.the-main-thread.com/p/quarkus-hibernate-offsetdatetime-timezone-mapping-tutorial
Just shipped a new deep-dive on something every Java dev with a messy repo needs:
A fully automated monorepo workflow for 50+ Java/Quarkus projects.
Dynamic build matrix. Automatic JDK detection. Per-project https://Shields.io badges.
And a README that updates itself. Zero manual CI maintenance.
https://www.the-main-thread.com/p/java-monorepo-dynamic-builds-github-actions-automation
No plans for the weekend? New to Quarkus? Get started with the new basic learning path on #IBM Developers!
ibm.biz/quarkusbasics
Join us next Monday, December 8th, at 9am EST for Quarkus Insights Ep. 229 as Guillaume Smet and Georgios Andrianakis joins us to discuss the hard won lessons in the 6 years of developing Quarkus. Gain valuable insights into how and why important decisions were made when developing Quarkus, with the hope of helping you avoid our mistakes and leverage what we got right.
Java 25 + Quarkus + FFmpeg + the FFM API.
A full, zero-copy video pipeline in pure Java:
✓ native-speed decoding
✓ real-time object detection
✓ FFmpeg filters (hqdn3d)
✓ MJPEG + WebSocket streaming
✓ no JNI, no subprocess hacks
If you’ve followed my JavaCV + FFM API posts last week, this rounds everything up.
Full hands-on tutorial ↓
https://www.the-main-thread.com/p/java25-quarkus-ffmpeg-video-pipeline-tutorial
#Java’s performance gap in #CloudNative environments is shrinking fast. Holger Tiemeyer shows how #Quarkus cuts startup times, lowers memory use, and aligns with reactive principles. Want the full picture?
Read the article: https://javapro.io/2025/12/04/java-meets-the-future-how-quarkus-seamlessly-combines-architecture-performance-and-cloud-native/
QuarkusIO #JAVAPRO RedHat
Java finally gets native superpowers.
Just published a new hands-on tutorial where we call ImageMagick directly from Java 25 using the Foreign Function & Memory API.
No JNI. No C glue. Just pure Java + Quarkus doing real image processing.
If you’ve wondered how Python calls fast C libraries… this is how Java does it now.
👉 https://www.the-main-thread.com/p/java-ffm-api-quarkus-imagemagick-tutorial
This brief article discusses how the Quarkus LangChain4j extensions simplifies further use of the library and how you can use it to build an agentic application.
https://www.javaadvent.com/2025/12/quarkus-langchain4j-extension-from-grounds-up.html
Microsoft’s JAZ (preinstalled in the Azure Linux OpenJDK images) auto-detects your container limits and configures heap + GC settings before Quarkus starts.
I wrote a full hands-on tutorial showing how to build a Quarkus app, package it into the Microsoft OpenJDK image, and verify JAZ’s tuned JVM settings with real metrics.
Smarter heap sizing. No more OOMKills. Zero guesswork.
https://www.the-main-thread.com/p/quarkus-java-jaz-auto-tuning-container-memory
#Java #Quarkus #OpenJDK #ContainerMemory #CloudNativeJava #JVM
Running #Quarkus on #AWSLambda “out of the box” can lead to slow starts and missed optimizations. Vadym Kazulkin walks through five concrete setups—from vanilla Java to #SnapStart priming & native #GraalVM.
Make every millisecond count: https://javapro.io/2025/08/05/how-to-develop-run-and-optimize-quarkus-web-application-on-aws-lambda/
@graalvm @awscloud
New hands-on tutorial on The Main Thread 🚀
I built a real-time emotion detector in Java using #Quarkus, #JavaCV, #WebSocketsNext, and #LangChain4j.
The pipeline streams webcam frames → detects faces locally → sends only the cropped face to a multimodal LLM (GPT-4o/Gemini) for emotion classification.
High-throughput + low latency = fun and surprisingly practical.
👉 https://www.the-main-thread.com/p/real-time-emotion-detection-quarkus-langchain4j-webcam
Java Roundup: Spring Cloud, Quarkus, and Hibernate ORM Updates
https://techlife.blog/posts/this-weeks-java-roundup-november-24th-2025/
#Java #SpringCloud #Quarkus #HibernateORM #JobRunr #LangChain4j
