Book Image

Mastering AWS Lambda

By : Yohan Wadia, Udita Gupta
Book Image

Mastering AWS Lambda

By: Yohan Wadia, Udita Gupta

Overview of this book

AWS is recognized as one of the biggest market leaders for cloud computing and why not? It has evolved a lot since the time it started out by providing just basic services such as EC2 and S3 and today; they go all the way from IoT to Machine Learning, Image recognition, Chatbot Frameworks, and much more! One of those recent services that is also gaining a lot of traction is AWS Lambda! Although seemingly simple and easy to use, Lambda is a highly effective and scalable compute service that provides developers with a powerful platform to design and develop Serverless event-driven systems and applications. The book begins with a high-level introduction into the world of Serverless computing and its advantages and use cases, followed by a deep dive into AWS Lambda! You’ll learn what services AWS Lambda provides to developers; how to design, write, and test Lambda functions; as well as monitor and troubleshoot them. The book is designed and accompanied with a vast variety of real-world examples, use cases, and code samples that will enable you to get started on your Serverless applications quickly. By the end of the book, you will have gained all the skills required to work with AWS Lambda services!
Table of Contents (11 chapters)

Data transformation

Yet another key use case for Lambda has been its ability to transform data on the fly. Say you have a stream of data coming into an S3 bucket in the form of one or more CSV files, each CSV file being different in size. For your application to process this data, it first needs to be transformed into a JSON file and then uploaded to a DynamoDB table. So, how do you get this done effectively? One way is to leverage an EC2 instance that will periodically poll or pull the CSV files from S3, transform it, and upload it to DynamoDB. However, this can have potential issues, for example: what happens when there are no files coming into S3 for a long time? Do you keep the EC2 instance up and running all this time? Also, polling or pulling the files from S3 will require its own set of logic that you will have to maintain, which can be an additional burden. So, what&apos...