Spring ApplicationContext Hierarchy and a High CVE in Axelix
How Spring's ApplicationContext hierarchy caused a JWT bypass in Axelix when Actuator ran on a separate management port.
Spring
Spring AI or LangChain4j? One App, Three Stacks, One Test
The same small AI service in Spring AI, LangChain4j on Spring Boot and on Quarkus, held to one shared test. Where they differ, and where …
Streaming Large File Uploads in Java Without Killing Your Server
Spring's @RequestPart cannot stream multipart uploads — not even FilePart. The API that actually does, and the tests that prove it.
Spring Boot's Hidden Secret for Configuration: EnvironmentPostProcessor
How to ship default configuration from a shared Spring Boot starter so services can still override it.
No Quote, No Claim: Making an LLM Show Its Sources in Java
My job portal asks Gemini why a job fits a candidate. Every claim must quote its source, and a few lines of plain Java drop any quote that …
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.
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 …
Lightweight Spring Boot Monitoring Without Prometheus and Grafana
Monitor Spring Boot applications on a small VPS using Actuator and StatLite, without operating a full Prometheus and Grafana stack.
One Embedding per Job, or Two? Measuring Semantic Search in a Spring Boot Job Portal
I stored two embeddings for every job in my Spring Boot job portal and measured which one finds the right jobs. One of them barely mattered, …
What I Learned Building an AI Code Reviewer with Java and Spring Boot
What I learned building an AI code-review workflow around GitHub Pull Requests, Spring Boot, and multiple AI providers.