In recent years, reactive programming has become a prominent concept in backend development. Particularly in Java, frameworks like Project Reactor, RxJava, and Spring WebFlux are now commonly discussed when designing scalable systems. But does reactive programming truly offer value in the context of microservices, or is it just another passing trend? This blog explores what reactive programming in Java really means, how it fits into microservices architecture, and when it actually makes sense to adopt it. What is Reactive Programming? Reactive programming is a programming paradigm focused on asynchronous data streams and non-blocking execution. Unlike traditional imperative code, reactive code deals with events and changes in state over time, often using constructs like observables, publishers, and subscribers. In Java, this style of programming is most notably supported by: Project Reactor (used in Spring WebFlux) RxJava Akka Streams These libraries allow developers to work with data ...