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…
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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 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…
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…
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…
Оптимизация генерации ресурсов в Java, три Ryzen и 225 замеров
Почему ручное разбиение задач оказалось быстрее parallel().collect() в большинстве наших тестов. Привет, Хабр! Меня зовут Юрий, и уже десять лет я р…
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…
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…
Production-Ready Java REST Client: Retries, Pagination, Rate Limits, and Error Handling
Production-Ready Java REST Client: Retries, Pagination, Rate Limits, and Error Handling A simple REST client is easy to build. A production-ready RE…
Java Records and Sealed Classes: Designing Type-Safe Domain Models
Modern Java has undergone a significant renaissance. Long criticized for excessive boilerplate, verbosity, and the sheer amount of ceremony required…
Building Long-Running Payment Workflows with Spring Boot and NERV Event
Building Long-Running Payment Workflows with Spring Boot and NERV Event Some payment operations finish in milliseconds. Others don't. Imagine a paym…
The Database Tells You What Is. An Audit Trail Tells You What Happened
Something is wrong with a customer's account. You open the database and run: SELECT * FROM customer_account WHERE id = 12345 ; The row looks perfect…
Java WebAssembly Meets WebForms Core 2.2
WebAssembly allows applications written in languages other than JavaScript to execute directly in the browser. With WebForms Core 2.2, Java can also…
Concurrency Programming (7): volatile — From Language Semantics to the CPU
Table of Contents 0. What Does This Article Answer Next? 1. What Guarantees Does Java volatile Provide at the Language Level? 1.1 Visibility and Ord…
Openspreader: The missing piece of Java concurrency. `java.util.concurrent`, scoped to the cluster.
Thirteen coordination primitives as one Spring Boot starter. The APIs you already know, spanning every instance of your application instead of one J…
Why I Built a Modern Spring Initializr Alternative with Visual JPA & Docker
Whenever I start a new Spring Boot project using standard tools like start.spring.io , the workflow usually looks like this: Select Spring Web, Spri…
@CacheEvict уходит раньше коммита, и кэш врёт до перезапуска
В Spring кэш и транзакции существуют рядом, но не знают друг о друге — из-за этого корректный на первый взгляд код может приводить к расхождениям ме…
The Silent Killer in Spring Boot: Why @Transactional Around Third-Party APIs Exhausts Your Connection Pool
It’s 03:00 PM on a Tuesday. Your monitoring dashboards go red. Incoming requests are timing out, HTTP 504 errors are spiking, and users are reportin…
Eliminating Race Conditions in Clustered Spring Boot with PostgreSQL Advisory Locks
It’s 02:14 AM. Your alert manager fires: an account balance dropped below zero, or a user received two trial credits instead of one. You trace the l…
I Removed an API Field. Hindsight Found Who Still Needed It.
API compatibility problems are rarely difficult because removing a field is technically hard. The difficult part is knowing who still depends on tha…
Building a Plugin (Microkernel) Architecture in Java
Ever been asked to add "just one more custom rule" to your application, only to watch your elegant logic turn into a massive, fragile switch stateme…
Building a Production-Ready Persistence Layer in Spring Boot
Spring Data JPA makes persistence remarkably easy to start with. Create an entity. Extend JpaRepository . Start writing business logic. public inter…
Activating the AI Autopilot: How I Used Claude Code to Hunt Down a Complex JNI Memory Leak
Activating the AI Autopilot: How I Used Claude Code to Hunt Down a Complex JNI Memory Leak When executing an extended soak test on a high-throughput…
I got tired of always being three Java versions behind, so I built a little game to fix it
Java ships a new version every six months. I kept telling myself I'd read the release notes "someday". Then I found myself in an interview, staring…
Retry policy на практике: подводные камни внедрения
Что делать, если произошла ошибка? Житейская мудрость говорит, что можно попробовать еще раз. В контексте разработки ПО существует известный и…
Debugging a 6-Second JVM Death Loop: A Bytecode Decompilation Story
The Symptom A secondary server in a High Availability (HA) failover cluster kept dying. Not crashing loudly — dying quietly , exactly 6-7 seconds af…
Verifiable Record Integrity Without a Blockchain
Authenticated execution and independently retained evidence for a PostgreSQL transaction workflow Viktor Khudiaiev · Publication updated September 2…