Software Architecture, Domain Driven Design, Kotlin, Spring Boot and the craft of building reliable systems.
Why even bother with an outbox for internal events? Early in the app lifecycle you can get away with one big transaction: change domain state, flush, all or nothing is committed. Simple. Then growth hits. New features keep adding more into the persistence context. Optimistic locks start colliding. …
Creating visually appealing and maintainable PDFs on the backend has always been a challenge. Traditional tools lag in support for modern HTML and CSS, leaving us with archaic table‑based designs. This guide explores using Chromium and Playwright in a Spring Boot application to produce great‑looking …
With the release of Spring Boot 3.0, we get official support for GraalVM native builds. Does it mean we can finally free ourselves from the overhead of the JVM? How do native builds improve an app’s performance? Where’s the trade‑off, and is it worth making? In this post, we’ll try to answer those …
Managing Spring Boot properties in a multi-module application can be intimidating. In this post, we’ll look at how Spring Boot resolves property conflicts and how to make our builds more consistent. Changes introduced in version 2.4 help a lot. Let’s review how to take advantage of the new features …
Layered architecture is one of the most popular choices in object‑oriented systems, and for good reason. When done right, it provides great separation of concerns, making each layer replaceable without the need to transform everything around it. But layers require a lot of additional models. In this …
BigDecimal is the go‑to type for holding decimal numbers. It’s used whenever high precision is required and we can’t afford rounding issues. But not everything about it is great. BigDecimal exposes a trap for developers. Let’s look at what that is and how to secure our code against it. Why do we …