Book Image

Kotlin Blueprints

By : Ashish Belagali, Akshay Chordiya, Hardik Trivedi
Book Image

Kotlin Blueprints

By: Ashish Belagali, Akshay Chordiya, Hardik Trivedi

Overview of this book

Kotlin is a powerful language that has applications in a wide variety of fields. It is a concise, safe, interoperable, and tool-friendly language. The Android team has also announced first-class support for Kotlin, which is an added boost to the language. Kotlin’s growth is fueled through carefully designed business and technology benefits. The collection of projects demonstrates the versatility of the language and enables you to build standalone applications on your own. You’ll build comprehensive applications using the various features of Kotlin. Scale, performance, and high availability lie at the heart of the projects, and the lessons learned throughout this book. You’ll learn how to build a social media aggregator app that will help you efficiently track various feeds, develop a geospatial webservice with Kotlin and Spring Boot, build responsive web applications with Kotlin, build a REST API for a news feed reader, and build a server-side chat application with Kotlin. It also covers the various libraries and frameworks used in the projects. Through the course of building applications, you’ll not only get to grips with the various features of Kotlin, but you’ll also discover how to design and prototype professional-grade applications.
Table of Contents (16 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback

Let's build our geospatial messenger

We are going to build a geospatial messenger to understand how to build a Spring Boot application with Kotlin and how to leverage language features of Kotlin to enable faster development. We will learn how to build robust apps while having fun with the concise syntax of Kotlin.

The idea of the geospatial messenger is to provide a layer of maps to the end user where they can leave messages on a particular coordinate, which can be read by anyone accessing the website. 


The preview of the UI of the application is shown, where the current location of the user is shown with the marker (depends if the user allows accessing location in the browser) and the envelope icon in the image denotes the messages left on a given coordinate:


Let's look at all the features we need to develop in our application:

  • To leave a message, the user needs to click on a location or co-ordinate of their choice, type their message in the message box and save 
  • To see an existing...