AdMuse: Local AI for Promotional Content for Small Creative Businesses
This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle . What I Built Artists and small creative businesses often h…
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A Green Test Suite Can Still Hide a Broken PR: 5 Questions to Ask Before Merging
AI coding assistants can write implementation code and tests in minutes. The problem is that both can look correct while the behavior that matters r…
Easy Full Stack Authentication and Login in the Style of Spring
Three requests leave your app just as its access token expires. If each refreshes independently, the first exchange can invalidate the refresh token…
Your XML Parser Opened a File Because the Document Asked It To
The feature was an import. Suppliers upload a product feed as XML, and the screen shows a preview. Name. Price. Description. A tester sent a feed wi…
Android on iOS, Web & Desktop Efficiently and for Free
We are not the first to bring Android to iOS. Earlier projects brought Android's runtime along with the application. Dalvik was built for Android, i…
Thread-Safe Counter in Java: Fix Your First Concurrency Bug in Machine Coding
Thread-Safe Counter in Java: Fix Your First Concurrency Bug in Machine Coding During high-pressure machine coding interviews, seemingly trivial buil…
Java Operators in GenAI
Introduction Java operators help developers perform calculations, comparisons, and logical operations. They are useful when building AI-powered appl…
Building a reading ruler that floats over every Android app: touch pass-through, Android 12's opacity cap, and masks
I make ReadFocus+, a small Android app that floats a translucent strip (a "reading ruler") over the screen, mainly for people with dyslexia or ADHD…
Spring Batch parallel processing and partitioning tutorial — Complete Guide
Spring Batch parallel processing and partitioning tutorial — Complete Guide A practical, in‑depth guide to Spring Batch parallel processing and part…
Building an Excel download API with TBEG and Spring Boot (Kotlin/Java)
In Part 3 , we explored TBEG's template syntax in depth. Now let's build an Excel download API with Spring Boot + TBEG - the most common real-world…
The Iceberg Table That Was Never Where We Wrote It
For the past week I've been working on Apache Hop , an open-source tool for building data pipelines. My goal was to let Hop read and write Apache Ic…
Spring Boot 3.5 Stopped Getting Patches in June. Don't Migrate to 4.0.
Two dates decide your next few weeks of Spring work: 30 June 2026 — Spring Boot 3.5 stopped getting free patches. 3.5.16 was the last one. 31 Decemb…
Building a Full RAG Pipeline in Spring Boot — From Ingest to Grounded Answer
Previous articles covered the individual pieces of RAG. You now know what embeddings are, how to chunk documents, and how Pinecone stores and search…
Tracing Java Programs Through Control Flow
When I started working with Java, even relatively small projects felt confusing. I could understand what individual classes and methods were doing,…
Four executable counterexamples from a component review repository
Disclosure: this article was generated by an AI agent from code it extracted, inspected and tested. AI agents also reviewed the extraction and repro…
One Interface, Seven Formats: How Solon AI Turns Files, Web Pages, and Even Database Schemas into RAG Documents
Every RAG pipeline starts the same way: you have stuff, and the model needs Document s. The interesting question is how far that idea stretches. Sol…
One Interface, Three Search Backends: Web Search Is Just Another Repository
If you build anything with LLMs, you will need web search sooner or later. The model's training data is frozen; your users' questions are not. In So…
Profit & Loss (P&L) for Engineering Leaders
Most engineering leaders can tell you their sprint velocity, their deployment frequency, and their open incident count. Far fewer can tell you what…
Managing Cross-Functional Teams: A Practical Guide for Engineering Leaders
Cross-functional teams are where most modern software gets built. Product defines the problem, design shapes the experience, engineering builds the…
Kotlin Coroutines vs Java Virtual Threads: A Comprehensive Comparison for Modern Backend Development
Kotlin Coroutines vs Java Virtual Threads: A Comprehensive Comparison for Modern Backend Development Introduction: The Concurrency Evolution The lan…
Hear is an repo which provides memorey and engineering process to your AI, just clone the repo and install as a plugin. Call the /commands and the app will take care of an end to end process. I have used open source model and lucenedb as JAVA applicatio.
Agentic-SDD: Giving Claude Code Agents a Real Engineering Process Mallikarjun H T Mallikarjun H T Mallikarjun H T Follow Oct 1 Agentic-SDD: Giving C…
Native Desktop Themes for Production Apps
A desktop app needs more than larger versions of its phone controls. Dialogs need their own windows. Title bars, scrollbars, and keyboard focus need…
How to secure a Spring Security client application with OIDC (using pac4j)
If you already have Spring Security in your application, with hasRole rules, @PreAuthorize on services and code reading SecurityContextHolder and yo…
Your Push Request Succeeded. The Device Key Is Dead.
Your server sends a push request and gets a successful response. Somewhere in the target list is a device key that stopped working weeks ago. The re…
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Artifact: log4j:log4j:1.2.17 Original JDK Target Java 1.4 (Class file major/minor version 48.0). Built to run on JDK 1.4 through JDK 8. When executi…
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1. Artifact: log4j:log4j:1.2.17 Original JDK Target Java 1.4 (Class file major/minor version 48.0). Built to run on JDK 1.4 through JDK 8. When exec…
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Artifact: log4j:log4j:1.2.17 Original JDK Target Java 1.4 (Class file major/minor version 48.0). Built to run on JDK 1.4 through JDK 8. When executi…
Chunking — Why How You Split Documents Decides Retrieval Quality
The previous article explained how embeddings convert text into vectors so similar meanings land close together in vector space. Before you can embe…
Polar Bear Cache: Fewer Remote Calls, More Ice 🐻❄️
I built Polar Bear Cache, a local caching library for Java and Spring applications, with a simple idea: serve frequently accessed data locally and r…
Concurrency Programming (8): Read-Write Locks — From Language Rules to the CPU
Table of Contents 0. What Does This Article Answer Next? 1. What Does Java ReadWriteLock Guarantee at the Language Level? 1.1 Atomicity 1.2 Visibili…