Book Image

Hands-On Microservices with Kotlin

By : Juan Antonio Medina Iglesias
Book Image

Hands-On Microservices with Kotlin

By: Juan Antonio Medina Iglesias

Overview of this book

With Google's inclusion of first-class support for Kotlin in their Android ecosystem, Kotlin's future as a mainstream language is assured. Microservices help design scalable, easy-to-maintain web applications; Kotlin allows us to take advantage of modern idioms to simplify our development and create high-quality services. With 100% interoperability with the JVM, Kotlin makes working with existing Java code easier. Well-known Java systems such as Spring, Jackson, and Reactor have included Kotlin modules to exploit its language features. This book guides the reader in designing and implementing services, and producing production-ready, testable, lean code that's shorter and simpler than a traditional Java implementation. Reap the benefits of using the reactive paradigm and take advantage of non-blocking techniques to take your services to the next level in terms of industry standards. You will consume NoSQL databases reactively to allow you to create high-throughput microservices. Create cloud-native microservices that can run on a wide range of cloud providers, and monitor them. You will create Docker containers for your microservices and scale them. Finally, you will deploy your microservices in OpenShift Online.
Table of Contents (14 chapters)

Understanding Spring WebFlux

Spring WebFlux is a new component introduced in Spring Framework 5.0 that allows the creation of reactive microservices using Netty as the new web/application server. WebFlux extensively uses the Reactor Framework to implement the reactive streams pattern. In this section, we will understand how to create Spring WebFlux applications, and how we can use them to migrate our non-reactive microservices into this new technological stack.

Creating a Spring WebFlux application

As before, we will use Spring Initializr to create a new Spring Boot Application, but in this case, a WebFlux application. First, navigate to the Spring Initializr site at https://start.spring.io/. We will choose to create a Maven...