Introducing reactive programming with WebFlux

Reactive programming is a paradigm designed to handle asynchronous data streams focusing on non-blocking, event-driven systems. Unlike traditional imperative programming models, reactive programming allows systems to react to changes in data or events in real time, making it especially suitable for modern applications that demand high performance and scalability.

Why reactive programming?

Traditionally, web servers handle requests using a thread pool, where each thread is dedicated to a single request. For instance, if a server has three threads, it can process three requests simultaneously, while a fourth request must wait until one of the threads becomes available. However, this model can lead to inefficiencies, as threads may remain idle while waiting for external operations, such as database responses. This idle time consumes memory and CPU resources without accomplishing meaningful work, which can create resource limitations...