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Validate Once, Enforce Everywhere: Protobuf + Protovalidate + Quarkus REST
Move common validation into Protobuf schemas for cross-language consistency
21 hrs ago
•
Markus Eisele
and
Joe Rinehart
3
1
Owning Your Workout Data with Java, Quarkus, and PostGIS
From Apple Health and Strava exports to spatial storage, heart-rate extraction, and server-side visualization in a real Java backend
Feb 13
•
Markus Eisele
4
1
Why Input Guardrails Fail for LLMs (and What Works Instead)
How StruQ and Spotlighting enforce real authority separation in LangChain4j applications
Feb 12
•
Markus Eisele
3
1
Listening to the Fediverse with Java: A Real-Time Quarkus Experiment
A hands-on Quarkus tutorial using Server-Sent Events, buffered ingestion, and PostgreSQL Dev Services to analyze real Fediverse conversations.
Feb 11
•
Markus Eisele
2
Why AI Makes Software Engineering Harder, Not Easier
AI speeds up coding but increases risk. Learn how Java developers can use AI safely by applying proven software engineering principles.
Feb 10
•
Markus Eisele
11
Why Query Rewriting Matters in RAG Systems
Using LangChain4j QueryTransformers with Quarkus Easy RAG
Feb 9
•
Markus Eisele
3
1
Unicode Defense in Java: The Complete Guide
How invisible characters, homograph attacks, and BiDi overrides break production systems and how to stop them in Quarkus.
Feb 8
•
Markus Eisele
4
1
The End of “Python for Scripts, Java for Systems”
How I stopped worrying and learned to love the script.
Feb 7
•
Markus Eisele
13
1
Building a Measurable RAG System with Quarkus Easy RAG, LangChain4j, and Ollama
Build a production-ready RAG system in Java with Quarkus and LangChain4j, then measure faithfulness, relevance, and hallucinations using real metrics.
Feb 6
•
Markus Eisele
4
1
The LangChain4j Proficiency Exam: 50 Questions for Senior Java Devs
Master LangChain4j with 50 expert-curated interview questions. Covers RAG pipelines, AI Services, Tool Support, and Memory management in Quarkus and…
Feb 5
•
Markus Eisele
8
2
Most Java Persistence Bugs Are Boring. Quarkus 3.31 Fixes Them at Compile Time.
Watch now: Why Quarkus 3.31 turns database correctness into a build-time problem for Java developers
Feb 4
•
Markus Eisele
and
Alex Soto Bueno
2
4
8:43
Pattern Matching Is Not Moderation: Semantic Toxicity Detection with Quarkus
Building production-grade toxicity filtering in Java using semantic models, ONNX, and Quarkus Guardrails instead of brittle pattern matching.
Feb 3
•
Markus Eisele
6
1
1
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