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Ditch H2: PostgreSQL Repository Tests with Testcontainers and @ServiceConnection in Spring Boot 4
3+ hour, 56+ min ago (204+ words) Your repository tests are green. Then production throws a column “metadata” is of type jsonb but expression is of type character varying…Continue reading on Medium » Ditch H2: PostgreSQL Repository Tests with Testcontainers and @ServiceConnection in Spring Boot 4 Your repository tests…...
Spring Boot 4 + Java 25: 10 Things You Should Stop Doing in Your REST APIs
5+ hour, 6+ min ago (38+ words) Modernizing only works when you can say out loud what each change buys you. “It’s newer” is not a reason. I keep a …...
How Uber Handles Trillions of Kafka Messages Without Bringing Everything Down
13+ hour, 59+ min ago (23+ words) How Uber built a Kafka architecture for trillions of daily messages using federated clusters, uReplicator, Chaperone, consumer proxies, dead-letter queues, and tiered storage....
Object-Oriented Programming in Software Engineering: Mastering the Core Concepts and How They Shape…
15+ hour, 47+ min ago (1158+ words) Object-Oriented Programming in Software Engineering: Mastering the Core Concepts and How They Shape Modern Software Development A practical guide to classes, objects, encapsulation, abstraction …...
Session 32: Deadlock Handling Strategies
21+ hour, 4+ min ago (758+ words) So now that we know what goes how a deadlock occurs we are now well equiped to think along the lines of Preventing and Handling Deadlocks. Ostrich Algorithm …...
Can Spring Boot Really Handle 1 Million Requests Per Second?
1+ day, 1+ hour ago (32+ words) Everyone asks if Spring Boot can handle 1M RPS. That’s the wrong question — here’s the one that actually matters. The answer has …...
15 Spring Boot 4 Features That Will Change How You Write REST APIs
1+ day, 4+ hour ago (36+ words) The version number is not the exciting part. The exciting part is that an upgrade gives you permission to finally fix the things …...
Build an AI-Powered Java Code Review Agent with Spring Boot
1+ day, 5+ hour ago (38+ words) I used to think AI code review would be simple. Send Java code to an LLM. Ask: “Review this code and tell me what is wrong.” Done. But …...
Kafka Delivery Semantics Explained: Why Your Consumer Processes Records Twice
1+ day, 6+ hour ago (25+ words) At-most-once, at-least-once, and exactly-once — what each actually guarantees, why duplicates happen, and how to build …...
Optimistic vs. Pessimistic Concurrency Control: Preventing Lost Updates
1+ day, 5+ hour ago (580+ words) Concurrency control isn’t about preventing multiple users from doing work. It’s about preventing concurrent work from violating the state your business considers valid. Modern applications execute many operations at the same time. Usually, that’s exactly what we want. But concurrency…...