With the growing requirement for things that make life easy, the need to write code that is more reliable, easier to scale, and more performant (by making your apps more responsive) has increased. Reactive programming is the solution to meeting these needs, helping you build scalable applications.

This course will introduce you to the concept of reactive programming and will also cover how reactive applications scale vertically rather than horizontally. You will then learn about the Spring Reactor project that is at the heart of Spring by creating a simple reactive app with the Flux and Mono APIs. You will create a reactive app that is ready for the cloud. You will then look at how to use this in a web context using the Spring Web Flux module and implement router functions to build reactive web services that work in the cloud. You will then debug your application and move on to a complete project example using Spring Web Flux, Spring Data, and router functions. Lastly, you will learn how to test your code using the reactor-test dependency.

By the end of the course, you will have learned to make your app responsive, reliable, and scalable by applying reactive principles with Spring 5.

All the code and supporting files for this course are available on GitHub at