Markus Eisele
@myfear.com
Developer, turned to consulting, developer relations, sales, and landed in marketing.
Writing books for #Oreilly.
Into Java, Kubernetes and such.
Legal called to tell you that I'm not officially speaking for IBM.
Writing books for #Oreilly.
Into Java, Kubernetes and such.
Legal called to tell you that I'm not officially speaking for IBM.
Pinned
Markus Eisele
@myfear.com
· 21d
My new book with Alex Soto Bueno and Natale Vinto just dropped:
Applied AI for Enterprise Java
The practical field guide for Java developers bringing AI to production.
Full story (and how it came to life between family, travel, and too much coffee):
buff.ly/2iDl9ba
#Java #AI #Quarkus #LangChain4j
Applied AI for Enterprise Java
The practical field guide for Java developers bringing AI to production.
Full story (and how it came to life between family, travel, and too much coffee):
buff.ly/2iDl9ba
#Java #AI #Quarkus #LangChain4j
No Pain, No Gain
How physical and mental challenges make us stronger at any age
buff.ly
December 9, 2025 at 11:02 AM
Just shipped a new Quarkus tutorial:
Recursive comment threads (Reddit-style) with Jakarta Data and PostgreSQL recursive CTEs
= One SQL query, infinite replies
Super clean pattern for hierarchical data in Java.
🔗 buff.ly/SlyaJjF
#Java #Quarkus #Postgres #CTE
Recursive comment threads (Reddit-style) with Jakarta Data and PostgreSQL recursive CTEs
= One SQL query, infinite replies
Super clean pattern for hierarchical data in Java.
🔗 buff.ly/SlyaJjF
#Java #Quarkus #Postgres #CTE
December 9, 2025 at 7:15 AM
Just shipped a new Quarkus tutorial:
Recursive comment threads (Reddit-style) with Jakarta Data and PostgreSQL recursive CTEs
= One SQL query, infinite replies
Super clean pattern for hierarchical data in Java.
🔗 buff.ly/SlyaJjF
#Java #Quarkus #Postgres #CTE
Recursive comment threads (Reddit-style) with Jakarta Data and PostgreSQL recursive CTEs
= One SQL query, infinite replies
Super clean pattern for hierarchical data in Java.
🔗 buff.ly/SlyaJjF
#Java #Quarkus #Postgres #CTE
I built a full Quarkus Actuator-style extension from scratch and documented the entire process.
- Extension generator
- Build-time processing
- Runtime beans
- Git + build metadata
- Custom /actuator/info endpoint
buff.ly/CyYPGlM
#Java #Quarkus #DevTools #Observability #LLMReadyJava
- Extension generator
- Build-time processing
- Runtime beans
- Git + build metadata
- Custom /actuator/info endpoint
buff.ly/CyYPGlM
#Java #Quarkus #DevTools #Observability #LLMReadyJava
December 8, 2025 at 7:15 AM
I built a full Quarkus Actuator-style extension from scratch and documented the entire process.
- Extension generator
- Build-time processing
- Runtime beans
- Git + build metadata
- Custom /actuator/info endpoint
buff.ly/CyYPGlM
#Java #Quarkus #DevTools #Observability #LLMReadyJava
- Extension generator
- Build-time processing
- Runtime beans
- Git + build metadata
- Custom /actuator/info endpoint
buff.ly/CyYPGlM
#Java #Quarkus #DevTools #Observability #LLMReadyJava
Java’s AI Awakening: A Backend Engineer’s Perspective on LangChain4j vs Spring AI
buff.ly/EsaISMH
#Java #langchain4j #genai
buff.ly/EsaISMH
#Java #langchain4j #genai
Java’s AI Awakening: A Backend Engineer’s Perspective on LangChain4j vs Spring AI
Introduction
buff.ly
December 7, 2025 at 2:39 PM
Java’s AI Awakening: A Backend Engineer’s Perspective on LangChain4j vs Spring AI
buff.ly/EsaISMH
#Java #langchain4j #genai
buff.ly/EsaISMH
#Java #langchain4j #genai
Phones leak GPS + device info in image metadata.
Here’s how to strip all EXIF data using Quarkus and Apache Commons Imaging.
A clean, production-ready Java service.
buff.ly/D1ofAkk
#Java #Quarkus #Security
Here’s how to strip all EXIF data using Quarkus and Apache Commons Imaging.
A clean, production-ready Java service.
buff.ly/D1ofAkk
#Java #Quarkus #Security
December 7, 2025 at 7:15 AM
Phones leak GPS + device info in image metadata.
Here’s how to strip all EXIF data using Quarkus and Apache Commons Imaging.
A clean, production-ready Java service.
buff.ly/D1ofAkk
#Java #Quarkus #Security
Here’s how to strip all EXIF data using Quarkus and Apache Commons Imaging.
A clean, production-ready Java service.
buff.ly/D1ofAkk
#Java #Quarkus #Security
Unlock the social dynamics of Huck Finn: extract characters, analyze sentiment per sentence, and generate an interactive character graph with Java and OpenNLP. A must-read for devs and lit-nerds alike.
#TextAnalytics #LLM #opensource
buff.ly/c5rtws2
#TextAnalytics #LLM #opensource
buff.ly/c5rtws2
Charting Twain: Building a Character Interaction Graph with Quarkus, OpenNLP, and a local Ollama Model
Uncover hidden dynamics in Huckleberry Finn using Java, sentiment analysis, and modern NLP.
buff.ly
December 6, 2025 at 11:01 AM
Unlock the social dynamics of Huck Finn: extract characters, analyze sentiment per sentence, and generate an interactive character graph with Java and OpenNLP. A must-read for devs and lit-nerds alike.
#TextAnalytics #LLM #opensource
buff.ly/c5rtws2
#TextAnalytics #LLM #opensource
buff.ly/c5rtws2
Just published a new Quarkus deep dive!
Hibernate ORM gives us a clean way to store OffsetDateTime with the original time-zone offset intact.If you work on distributed systems, scheduling, billing, or anything multi-region, this one matters.
Check it out:
buff.ly/TUNo54m
#Java #Quarkus #Hibernate
Hibernate ORM gives us a clean way to store OffsetDateTime with the original time-zone offset intact.If you work on distributed systems, scheduling, billing, or anything multi-region, this one matters.
Check it out:
buff.ly/TUNo54m
#Java #Quarkus #Hibernate
December 6, 2025 at 7:15 AM
Just published a new Quarkus deep dive!
Hibernate ORM gives us a clean way to store OffsetDateTime with the original time-zone offset intact.If you work on distributed systems, scheduling, billing, or anything multi-region, this one matters.
Check it out:
buff.ly/TUNo54m
#Java #Quarkus #Hibernate
Hibernate ORM gives us a clean way to store OffsetDateTime with the original time-zone offset intact.If you work on distributed systems, scheduling, billing, or anything multi-region, this one matters.
Check it out:
buff.ly/TUNo54m
#Java #Quarkus #Hibernate
Ever wondered how to manage 100+ Java/Quarkus projects in one repo without losing your mind?
I built a “Smart Matrix” workflow that:
- Detects what changed
- Picks the right JDK per project
- Generates per-project status badges
buff.ly/yzsx5K4
#Java #Quarkus #GitHubActions #CI #Monorepo
I built a “Smart Matrix” workflow that:
- Detects what changed
- Picks the right JDK per project
- Generates per-project status badges
buff.ly/yzsx5K4
#Java #Quarkus #GitHubActions #CI #Monorepo
December 6, 2025 at 7:15 AM
Ever wondered how to manage 100+ Java/Quarkus projects in one repo without losing your mind?
I built a “Smart Matrix” workflow that:
- Detects what changed
- Picks the right JDK per project
- Generates per-project status badges
buff.ly/yzsx5K4
#Java #Quarkus #GitHubActions #CI #Monorepo
I built a “Smart Matrix” workflow that:
- Detects what changed
- Picks the right JDK per project
- Generates per-project status badges
buff.ly/yzsx5K4
#Java #Quarkus #GitHubActions #CI #Monorepo
No plans for the weekend? New to Quarkus? Get started with the new basic learning path on #IBM Developers!
ibm.biz/quarkusbasics
#Java #Quarkus #Learning
ibm.biz/quarkusbasics
#Java #Quarkus #Learning
December 5, 2025 at 2:39 PM
No plans for the weekend? New to Quarkus? Get started with the new basic learning path on #IBM Developers!
ibm.biz/quarkusbasics
#Java #Quarkus #Learning
ibm.biz/quarkusbasics
#Java #Quarkus #Learning
Reposted by Markus Eisele
JDK 26 has been branched from the main line and is now in Rampdown Phase One: mail.openjdk.org/pipermail/jd...
openjdk.org/projects/jdk/26/
#JDK26 #OpenJDK #Java
openjdk.org/projects/jdk/26/
#JDK26 #OpenJDK #Java
mail.openjdk.org
December 4, 2025 at 6:53 PM
JDK 26 has been branched from the main line and is now in Rampdown Phase One: mail.openjdk.org/pipermail/jd...
openjdk.org/projects/jdk/26/
#JDK26 #OpenJDK #Java
openjdk.org/projects/jdk/26/
#JDK26 #OpenJDK #Java
Reposted by Markus Eisele
Unlock the potential of #WebAssembly on the #JVM!
Using Red Hat's Chicory runtime, Andrea Peruffo explains how to achieve:
✅ Secure sandboxing
✅ Fault isolation
✅ Cross-platform portability — no foreign function interface needed
🔗 bit.ly/446So5U
#Java #WebDevelopment #SoftwareArchitecture
Using Red Hat's Chicory runtime, Andrea Peruffo explains how to achieve:
✅ Secure sandboxing
✅ Fault isolation
✅ Cross-platform portability — no foreign function interface needed
🔗 bit.ly/446So5U
#Java #WebDevelopment #SoftwareArchitecture
December 5, 2025 at 12:07 PM
Unlock the potential of #WebAssembly on the #JVM!
Using Red Hat's Chicory runtime, Andrea Peruffo explains how to achieve:
✅ Secure sandboxing
✅ Fault isolation
✅ Cross-platform portability — no foreign function interface needed
🔗 bit.ly/446So5U
#Java #WebDevelopment #SoftwareArchitecture
Using Red Hat's Chicory runtime, Andrea Peruffo explains how to achieve:
✅ Secure sandboxing
✅ Fault isolation
✅ Cross-platform portability — no foreign function interface needed
🔗 bit.ly/446So5U
#Java #WebDevelopment #SoftwareArchitecture
Reposted by Markus Eisele
Over the last week we explored #JavaCV and the new FFM API in Java 25.
Now we put it all together: a video processing pipeline in #Quarkus.
Real-time decoding, #FFmpeg filters, object detection, MJPEG streaming, WebSockets.
No JNI. No subprocesses. Just #Java.
Full tutorial:
buff.ly/uFOhiCo
Now we put it all together: a video processing pipeline in #Quarkus.
Real-time decoding, #FFmpeg filters, object detection, MJPEG streaming, WebSockets.
No JNI. No subprocesses. Just #Java.
Full tutorial:
buff.ly/uFOhiCo
December 5, 2025 at 7:15 AM
Over the last week we explored #JavaCV and the new FFM API in Java 25.
Now we put it all together: a video processing pipeline in #Quarkus.
Real-time decoding, #FFmpeg filters, object detection, MJPEG streaming, WebSockets.
No JNI. No subprocesses. Just #Java.
Full tutorial:
buff.ly/uFOhiCo
Now we put it all together: a video processing pipeline in #Quarkus.
Real-time decoding, #FFmpeg filters, object detection, MJPEG streaming, WebSockets.
No JNI. No subprocesses. Just #Java.
Full tutorial:
buff.ly/uFOhiCo
Holly Cummins talks to Martin Štefanko and Jan Martiška from IBM about their new book "Quarkusio in Action"! Learn why they wrote it, what surprised them during the process, and get expert advice on JVM vs native compilation.
Quarkus in Action • Martin Stefanko, Jan Martiska & Holly Cummins • GOTO 2025
This interview was recorded for the GOTO Book Club. #GOTOcon #GOTObookclub
http://gotopia.tech/bookclub
Check out more here:
https://gotopia.tech/episodes/416
Martin Štefanko - Quarkus Core…
buff.ly
December 5, 2025 at 6:08 AM
Holly Cummins talks to Martin Štefanko and Jan Martiška from IBM about their new book "Quarkusio in Action"! Learn why they wrote it, what surprised them during the process, and get expert advice on JVM vs native compilation.
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.
buff.ly/6Qv9UK8
#Java #Quarkus
buff.ly/6Qv9UK8
#Java #Quarkus
Quarkus LangChain4j extension from grounds up - JVM Advent
LangChain4j is a top (if not the top) library in use for integrating Java applications with various LLMs (large language models). It provides a number of features such as a unified API for LLM…
buff.ly
December 4, 2025 at 11:01 AM
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.
buff.ly/6Qv9UK8
#Java #Quarkus
buff.ly/6Qv9UK8
#Java #Quarkus
I built a full #Quarkus app that loads an image, runs it through #ImageMagick, and returns a polaroid — all through the Foreign Function & Memory API in JDK 25.
If you’re curious how #Java taps into the same native performance Python relies on, this is for you.
buff.ly/nxEU9cX
#FFMAPI #JDK25
If you’re curious how #Java taps into the same native performance Python relies on, this is for you.
buff.ly/nxEU9cX
#FFMAPI #JDK25
December 4, 2025 at 7:15 AM
I built a full #Quarkus app that loads an image, runs it through #ImageMagick, and returns a polaroid — all through the Foreign Function & Memory API in JDK 25.
If you’re curious how #Java taps into the same native performance Python relies on, this is for you.
buff.ly/nxEU9cX
#FFMAPI #JDK25
If you’re curious how #Java taps into the same native performance Python relies on, this is for you.
buff.ly/nxEU9cX
#FFMAPI #JDK25
Java in containers doesn’t need manual heap tuning anymore.
Microsoft’s JAZ auto-configures your JVM based on real container limits, and it works perfectly with Quarkus.
I put together a step-by-step guide!
🔗 buff.ly/AoUk6dR
#Java #Quarkus #JVM #OpenJDK #CloudNative
Microsoft’s JAZ auto-configures your JVM based on real container limits, and it works perfectly with Quarkus.
I put together a step-by-step guide!
🔗 buff.ly/AoUk6dR
#Java #Quarkus #JVM #OpenJDK #CloudNative
December 3, 2025 at 7:15 AM
Java in containers doesn’t need manual heap tuning anymore.
Microsoft’s JAZ auto-configures your JVM based on real container limits, and it works perfectly with Quarkus.
I put together a step-by-step guide!
🔗 buff.ly/AoUk6dR
#Java #Quarkus #JVM #OpenJDK #CloudNative
Microsoft’s JAZ auto-configures your JVM based on real container limits, and it works perfectly with Quarkus.
I put together a step-by-step guide!
🔗 buff.ly/AoUk6dR
#Java #Quarkus #JVM #OpenJDK #CloudNative
December 3, 2025 at 6:08 AM
Reposted by Markus Eisele
Instead of buying stuff during Black Friday that I don’t really need, I’m sponsoring open source #Java projects that I rely on. Today's donation is to Tatu Saloranta, the authot of the #Jackson JSON library (among other things!).
github.com/sponsors/co...
github.com/sponsors/co...
Sponsor @cowtowncoder on GitHub Sponsors
Tatu Saloranta, better known as the "Cowtowncoder", is a long-time Open Source developer. He has authored and maintains many popular Java OSS libraries, including Jackson JSON library, Wo...
github.com
December 2, 2025 at 5:30 PM
Instead of buying stuff during Black Friday that I don’t really need, I’m sponsoring open source #Java projects that I rely on. Today's donation is to Tatu Saloranta, the authot of the #Jackson JSON library (among other things!).
github.com/sponsors/co...
github.com/sponsors/co...
Built a fun real-time AI demo this week:
Webcam → #JavaCV face detection → #LangChain4j multimodal emotion analysis → Live overlay in the browser.
If you want to see how high-throughput video and low-latency AI actually work together, this tutorial walks through the full pipeline.
buff.ly/Xa9Mwpa
Webcam → #JavaCV face detection → #LangChain4j multimodal emotion analysis → Live overlay in the browser.
If you want to see how high-throughput video and low-latency AI actually work together, this tutorial walks through the full pipeline.
buff.ly/Xa9Mwpa
December 2, 2025 at 7:15 AM
Built a fun real-time AI demo this week:
Webcam → #JavaCV face detection → #LangChain4j multimodal emotion analysis → Live overlay in the browser.
If you want to see how high-throughput video and low-latency AI actually work together, this tutorial walks through the full pipeline.
buff.ly/Xa9Mwpa
Webcam → #JavaCV face detection → #LangChain4j multimodal emotion analysis → Live overlay in the browser.
If you want to see how high-throughput video and low-latency AI actually work together, this tutorial walks through the full pipeline.
buff.ly/Xa9Mwpa
ICYMI: Taming Unstructured Data: From PDFs to JSON with Quarkus and Docling buff.ly/uKtX1ce
#Java #quarkus #Docling #Data
#Java #quarkus #Docling #Data
Taming Unstructured Data: From PDFs to JSON with Quarkus and Docling
Build a fast, scalable converter to turn business documents into structured data using Quarkus and Docling—perfect for RAG pipelines, search indexing, and LLM prep.
buff.ly
December 1, 2025 at 2:39 PM
ICYMI: Taming Unstructured Data: From PDFs to JSON with Quarkus and Docling buff.ly/uKtX1ce
#Java #quarkus #Docling #Data
#Java #quarkus #Docling #Data