How to Secure a Spring Boot Application with OpenID Connect and pac4j
Add OpenID Connect login to Spring Boot with pac4j: Maven setup, provider configuration, user profiles and logout.
Tutorials
Build Your First SaaS with MongoDB Ephemeral Clusters
Provision a MongoDB Atlas Ephemeral Cluster with one API call, then have an AI coding agent build a full-stack Spring Boot and React job …
World geography gotchas
Years ago, a colleague of mine told me about two pockets of foreign land surrounded by Switzerland: Campione d'Italia and Büsingen am …
Jakarta Faces, Java Web Framework, Stateless Edition: Marketplace AliFaces
A Fully Stateless Jakarta Faces Marketplace with Server-Side Rendering — No HttpSession, No Saved ViewState, No Sticky Sessions (see the poc …
Offline Crypto Address Validation in Java
Backend validation often starts with simple questions. Is the input empty? Does it have the expected shape? Can it be parsed? Does it belong …
Idempotent Write Paths: Keeping an Integration Pipeline Correct When Messages Repeat
A reconciliation that didn't add up Let me start with a real one. After a big sales promo, during reconciliation, finance said a batch of …
Idempotent Spring Boot: Safe REST with One Annotation
An idempotent Spring Boot starter that replays duplicate requests instead of re-executing them. One annotation, Redis or JDBC, atomic …
Getting Started with Exposed: Kotlin ORM Made Simple
Learn how to use Exposed, a lightweight SQL ORM for Kotlin. Discover DSL and DAO APIs, database support, and setup your first project.
Quarkus Unpacked: Insights from the Foojay Podcast
I recently had the pleasure of joining the Foojay podcast to talk about Quarkus in depth. The conversation covered a lot of ground, from …
Your TLS Stack Is Lying to You About Zero-Copy
In a zero-allocation runtime, SSLEngine becomes a structural mismatch. It keeps TLS on the heap-facing side of the JVM...