Book Image

Hands-On Serverless Applications with Go

By : Mohamed Labouardy
Book Image

Hands-On Serverless Applications with Go

By: Mohamed Labouardy

Overview of this book

Serverless architecture is popular in the tech community due to AWS Lambda. Go is simple to learn, straightforward to work with, and easy to read for other developers; and now it's been heralded as a supported language for AWS Lambda. This book is your optimal guide to designing a Go serverless application and deploying it to Lambda. This book starts with a quick introduction to the world of serverless architecture and its benefits, and then delves into AWS Lambda using practical examples. You'll then learn how to design and build a production-ready application in Go using AWS serverless services with zero upfront infrastructure investment. The book will help you learn how to scale up serverless applications and handle distributed serverless systems in production. You will also learn how to log and test your application. Along the way, you'll also discover how to set up a CI/CD pipeline to automate the deployment process of your Lambda functions. Moreover, you'll learn how to troubleshoot and monitor your apps in near real-time with services such as AWS CloudWatch and X-ray. This book will also teach you how to secure the access with AWS Cognito. By the end of this book, you will have mastered designing, building, and deploying a Go serverless application.
Table of Contents (17 chapters)

Working with DynamoDB

In this section, we will update the existing functions to read and write from/to the DynamoDB table. The following diagram describes the target architecture:

API Gateway will forward incoming requests to the target Lambda function, which will call the corresponding DynamoDB operation on the movies table.

Scan request

To get started, we need to implement the function responsible for returning a list of movies; the following steps describe how to achieve that:

  1. Update the findAll handler endpoint to use the Scan method to fetch all items from the table:
func findAll() (events.APIGatewayProxyResponse, error) {
cfg, err := external.LoadDefaultAWSConfig()
if err != nil {
return events.APIGatewayProxyResponse...