Microservice architecture patterns — from decomposition strategies to inter-service communication and distributed data management.
A microservice without observability is a black box you cannot operate. This article introduces the TRACE framework — structured logging with correlation IDs, custom business metrics with Micrometer, and distributed tracing with Zipkin. The three pillars that make production debuggable.
Traditional thread pools cap at 200 threads eating 200 MB of memory. Java virtual threads handle 10,000+ concurrent operations at 1 KB each. This article covers the ASYNC framework — virtual thread configuration, CompletableFuture composition, parallel fetching, and async bulk processing.
Generic error responses tell your users nothing and your developers even less. This article introduces the CRAFT framework — sealed exception hierarchies, RFC 7807 ProblemDetail responses, multi-layer validation, and a GlobalExceptionHandler that turns failures into useful communication.
Security is either invisible and effective or visible and broken. This article covers the GUARD framework for Spring Security — SecurityFilterChain configuration, role-based access control, CORS policies, BCrypt password encoding, and a test security setup that doesn't weaken production.
Naive caching causes stale data, memory exhaustion, and race conditions. Smart caching solves all three. This article introduces the TEMPO framework — TTL-based expiration, eviction strategies, multiple cache regions, and SpEL-driven cache keys using Caffeine and Spring.
Getting the data layer wrong costs you months of refactoring later. This article walks through the FORGE framework — Flyway migrations, JPA entity design, Spring Data repositories, transaction management, and audit trails — building a persistence layer that evolves safely.
A perfectly engineered microservice is useless if developers hate the API. This article covers the CLEAR framework for REST design — consistent naming, multi-layer validation, RFC 7807 error contracts, and OpenAPI documentation that turns your endpoints into a product people want to use.
Spring Boot auto-configuration feels like magic until something breaks at 2 AM. This article deconstructs the PROPS framework — profiles, property binding, bean lifecycle, and starter dependencies — so you understand every piece of the machinery running your microservice.
