In our post on Spring Modulith, we left a golden tip at the end: the ability to generate documentation based on code. We’re going to explore how to turn your code into the single source of truth (Docs as Code), using Spring Modulith to automatically export PlantUML and C4 Model diagrams on every build.
In our previous article about Spring Modulith, we touched on a crucial point for avoiding the dreaded "spaghetti code": Event-Driven Communication. But did you know you don't need Kafka or RabbitMQ to start working with events? Many developers assume that events are synonymous with microservices and distributed messaging. The truth is that Spring Boot has a native, powerful mechanism for publishing and listening to events within the same JVM.
The software industry faces a constant dilemma: start with a monolith and risk creating a "Big Ball of Mud" (indecipherable spaghetti code) or start with microservices and be swallowed by operational complexity on day one. This is where the Modular Monolith shines and Spring Modulith is the definitive tool in the Java ecosystem to ensure this architecture is enforced. It allows us to apply Domain-Driven Design (DDD) concepts and keep code isolated and testable.