5 topics

Java & Spring Boot

JVM, Spring, concurrency, REST, persistence

Dependency Injection in Spring

Spring's IoC container wires collaborators at startup. Prefer constructor injection for required dependencies — it enables immutability, testability, and fail-fast wiring.

springiocbeans

Java & Spring Boot/senior

Transactions & @Transactional Pitfalls

@Transactional is a proxy-based AOP advice. Self-invocation, checked exceptions, and propagation defaults silently break what looks like correct code.

springjpatransactions

Java & Spring Boot/staff

JVM Tuning for Production

Pick the right GC, size the heap conservatively, and measure before tuning. Modern G1 / ZGC defaults are excellent — most 'tuning' is undoing bad flags.

jvmgcperformance

Java & Spring Boot/senior

Virtual Threads (Project Loom)

Virtual threads (JDK 21+) make blocking I/O cheap again. Treat them as the default for request handling; keep platform threads for CPU-bound work.

javaconcurrencyloom

Java & Spring Boot/senior

Spring Boot Startup Performance

Long startup hurts deploy velocity and Kubernetes rolling updates. Audit auto-configuration, prefer constructor injection, and consider AOT / native compilation for cold-start-sensitive workloads.

springperformancestartup