Book Image

Implementing AWS: Design, Build, and Manage your Infrastructure

By : Yohan Wadia, Rowan Udell, Lucas Chan, Udita Gupta
Book Image

Implementing AWS: Design, Build, and Manage your Infrastructure

By: Yohan Wadia, Rowan Udell, Lucas Chan, Udita Gupta

Overview of this book

With this Learning Path, you’ll explore techniques to easily manage applications on the AWS cloud. You’ll begin with an introduction to serverless computing, its advantages, and the fundamentals of AWS. The following chapters will guide you on how to manage multiple accounts by setting up consolidated billing, enhancing your application delivery skills, with the latest AWS services such as CodeCommit, CodeDeploy, and CodePipeline to provide continuous delivery and deployment, while also securing and monitoring your environment's workflow. It’ll also add to your understanding of the services AWS Lambda provides to developers. To refine your skills further, it demonstrates how to design, write, test, monitor, and troubleshoot Lambda functions. By the end of this Learning Path, you’ll be able to create a highly secure, fault-tolerant, and scalable environment for your applications. This Learning Path includes content from the following Packt products: • AWS Administration: The Definitive Guide, Second Edition by Yohan Wadia • AWS Administration Cookbook by Rowan Udell, Lucas Chan • Mastering AWS Lambda by Yohan Wadia, Udita Gupta
Table of Contents (29 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

Understanding events and AWS Lambda


Lambda works in a very similar way, as explained in the previous section. For instance, the emitters and channels act as the Lambda event source while the functions that we have been creating all this time act as the event consumers.

All in all, when an event is triggered by a particular AWS service, or even from an external source such as an application, that event gets mapped to a particular Lambda function which in turn, executes an action based on the code that you have written for it. This one-to-one mapping of events with their corresponding Lambda functions is what we call as Event Source Mapping and it is responsible for the automatic invocation of your Lambda functions whenever an event is fired.

There are two main categories of event sources supported by Lambda:

  • AWS services: Lambda supports a few of AWS's services as preconfigured event sources that you can use to develop easy event-driven systems with. Few of the services namely S3, SNS, SES,...