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)

Introducing Webhooks

Webhooks are simple callbacks that are rapidly growing in popularity with a lot of developers. Webhooks work in a very similar way to Lambda functions; they are invoked when a particular event is fired by an application on the web. This makes them highly applicable to a variety of web development use cases where, rather than having a traditional API that polls for data on a frequent basis, you use a Webhook to get data at real time.

With most APIs there's a request followed by a response, whereas in the case of Webhooks, they simply send the data whenever it's available.

The way a Webhook works is quite simple! To use a Webhook, you register a URL with the Webhook provider, for example IFTTT or Zapier. The URL is a place within your application that will accept the data and do something with it. In some cases, you can tell the provider the situations...