The term “reactive” has lately become a buzzword, with a variety of definitions around the Web. When you hear “reactive,” what do you think of? Reactive Streams? The Reactive Manifesto? ReactJS? These terms may seem unrelated, but they share a common core concept.
Reactive applications and Reactive programming result in flexible, concise, performant code and are a superior alternative to the old, standard thread-based imperative programming model. The Reactive approach has gained popularity recently for one simple reason: we need alternative designs and architectures to meet today’s demands. However, it can be difficult to shift one’s mind to think in Reactive terms due to how accustomed we’ve become to the imperative style.
Stephen Pember explores the various definitions of Reactive and Reactive programming with the goal of providing techniques for building efficient, scalable applications. Steve dives into the key concepts of Reactive Streams and examines some sample implementations—including how ThirdChannel is currently using reactive libraries in production code. Steve looks at some of the open source options available in the JVM—including Reactor, RxJava, and Ratpack—giving you an idea of where to begin with the reactive ecosystem. If Reactive is new to you, this should be an excellent introduction.
Steve has recently joined Klaviyo – an ecommerce marketing software company located in Boston, MA – as a Director of Engineering. He is previously the CTO of ThirdChannel, which crowdsources data from thousands of dedicated workers through their smart phones and then presents that data through visualization and analytic tools. There, he was responsible for designing and building a Reactive, Event-driven, Microservices based platform over 4+ years.
Steve is obsessed with highly scalable distributed systems, software architecture, and alternative data storage techniques like Event Sourcing…. and he loves telling the world about them.
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