Book Image

Building Applications with Spring 5 and Kotlin

By : Miloš Vasić
Book Image

Building Applications with Spring 5 and Kotlin

By: Miloš Vasić

Overview of this book

Kotlin is being used widely by developers because of its light weight, built-in null safety, and functional and reactive programming aspects. Kotlin shares the same pragmatic, innovative and opinionated mindset as Spring, so they work well together. Spring when combined with Kotlin helps you to reach a new level of productivity. This combination has helped developers to create Functional Applications using both the tools together. This book will teach you how to take advantage of these developments and build robust, scalable and reactive applications with ease. In this book, you will begin with an introduction to Spring and its setup with Kotlin. You will then dive into assessing the design considerations of your application. Then you will learn to use Spring (with Spring Boot) along with Kotlin to build a robust backend in a microservice architecture with a REST based collaboration, and leverage Project Reactor in your application. You’ll then learn how to integrate Spring Data and Spring Cloud to manage configurations for database interaction and cloud deployment. You’ll also learn to use Spring Security to beef up security of your application before testing it with the JUnit framework and then deploying it on a cloud platform like AWS.
Table of Contents (12 chapters)

What is Project Reactor?

Project Reactor is a project divided into several sub-projects. Each has a different purpose which combined, makes, a first-class tool for modern application development. Project Reactor consists of the following components:

  • Reactor Core: Core components
  • Reactor Test: Collection of test utilities
  • Reactor Adapter: For adapting to (or from) other reactive libraries
  • Reactor Netty: For developing HTTP, TCP, UDP client/servers with Netty
  • Reactor Extra: Additional operators for Flux
  • Reactor Kafka: Reactive bridge to Apache Kafka
  • Reactor RabbitMQ: Reactive bridge to RabbitMQ
  • Reactor Core .NET: Reactive Streams foundation for .NET
  • Reactor Core JS: Reactive Streams foundation for JavaScript

In the next section, we will adapt our API to use Project Reactor and improve our existing code base. Unfortunately, we will not be able to cover all Project Reactor sub-projects...