Book Image

Hands-On Serverless Applications with Kotlin

By : Hardik Trivedi, Ameya Kulkarni
Book Image

Hands-On Serverless Applications with Kotlin

By: Hardik Trivedi, Ameya Kulkarni

Overview of this book

Serverless is a cloud computing execution model where the cloud provider dynamically manages the allocation and provisioning of servers. Many companies now use serverless architectures to cut costs and improve scalability. Thanks to its concise and expressive syntax and a smooth learning curve, Kotlin is a great fit for developing serverless applications. With this book, you’ll be able to put your knowledge to work by implementing serverless technology in your applications and become productive in no time. Complete with detailed explanation of essential concepts and examples, this book will help you understand the serverless architecture fundamentals and how to design serverless architectures for your applications. You’ll also explore how AWS Lambda functions work. The book will guide you in designing, building, securing, and deploying your application to production, along with implementing non-functional requirements such as auditing and logging. Furthermore, you’ll discover how to scale up and orchestrate serverless applications using an open source framework and handle distributed serverless systems in production. By the end of the book, you’ll be able to build scalable and cost-efficient Kotlin applications with a serverless framework.
Table of Contents (11 chapters)
3
Designing a Kotlin Serverless Application

Implementing lambda functions

Lambda functions will hold our business logic. They will be executed when an API request is made. We have already shown you how lambda function needs to be bound with an API gateway. You will also see in Chapter 6, Analyzing your Application, how the lambda function will sit between the API gateway and CloudWatch. It will serve as a bridge.

Writing your first lambda function in Kotlin

You may have already written a lambda function in your project. AWS supports multiple languages for lambda functions. We will write our lambda function in Kotlin. The Kotlin code will be compiled and converted into a fat .jar file. Kotlin code can also be transpiled into JavaScript, and we will target Node.js in...