Clear and concise...the code samples are as well structured as the writing. From the Foreword by James Governor, RedMonk AWS Lambda in Action is an example-driven tutorial that teaches you how to build applications that use an event-driven approach on the back end. Listen to this book in liveAudio! liveAudio integrates a professional voice recording with the book’s text, graphics, code, and exercises in Manning’s exclusive liveBook online reader. Use the text to search and navigate the audio, or download the audio-only recording for portable offline listening. You can purchase or upgrade to liveAudio here or in liveBook.

About the Technology With AWS Lambda, you write your code and upload it to the AWS cloud. AWS Lambda responds to the events triggered by your application or your users, and automatically manages the underlying computer resources for you. Back-end tasks like analyzing a new document or processing requests from a mobile app are easy to implement. Your application is divided into small functions, leading naturally to a reactive architecture and the adoption of microservices.

About the book AWS Lambda in Action is an example-driven tutorial that teaches you how to build applications that use an event-driven approach on the back-end. Starting with an overview of AWS Lambda, the book moves on to show you common examples and patterns that you can use to call Lambda functions from a web page or a mobile app. The second part of the book puts these smaller examples together to build larger applications. By the end, you'll be ready to create applications that take advantage of the high availability, security, performance, and scalability of AWS.

takes you straight to the book detailed table of contents Table of Contents Part 1: First Steps 1. Running functions in the Cloud 1.1. Introducing AWS Lambda 1.2. Functions as your back end 1.3. A single back end for everything 1.4. Event-driven applications 1.5. Calling functions from a client 1.6. Summary 2. Your first Lambda function 2.1. Creating a new function 2.2. Writing the function 2.3. Specifying other settings 2.4. Testing the function 2.5. Executing the function through the Lambda API 2.6. Summary 2.7. Exercise 2.7.1. Solution 3. Your function as a web API 3.1. Introducing the Amazon API Gateway 3.2. Creating the API 3.3. Creating the integration 3.4. Testing the integration 3.5. Transforming the response 3.6. Using resource paths as parameters 3.7. Using the API Gateway context 3.8. Summary 3.9. Exercise 3.9.1. Solution Part 2: Building Event-driven Applications 4. Managing security 4.1. Users, groups, and roles 4.2. Understanding policies 4.3. Policies in practice 4.4. Using policy variables 4.5. Assuming roles 4.6. Summary 4.7. Exercise 4.7.1. Solution 5. Using standalone functions 5.1. Packaging libraries and modules with your function 5.2. Subscribing functions to events 5.2.1. Creating the back-end resources 5.2.2. Packaging the function 5.2.3. Configuring permissions 5.2.4. Creating the function 5.2.5. Testing the function 5.3. Using binaries with your function 5.3.1. Preparing the environment 5.3.2. Implementing the function 5.3.3. Testing the function 5.4. Scheduling function execution 5.5. Summary 5.6. Exercise 5.6.1. Solution 6. Managing identities 6.1. Introducing Amazon Cognito Identity 6.2. External identity providers 6.3. Integrating custom authentications 6.4. Having authenticated and unauthenticated users 6.5. Using policy variables with Amazon Cognito 6.6. Summary 6.7. Exercise 6.7.1. Solution 7. Calling functions from a client 7.1. Calling functions from JavaScript 7.1.1. Creating the identity pool 7.1.2. Giving permissions to the Lambda function 7.1.3. Creating the web page 7.2. Calling functions from a Mobile app 7.2.1. Sample code for native mobile apps 7.3. Calling functions from a web browser 7.3.1. Integrating the Lambda functions with the Amazon API Gateway 7.4. Summary 7.5. Exercise 7.5.1. Solution 8. Designing an authentication service 8.1. The interaction model 8.2. The event-driven architecture 8.3. Working with Amazon Cognito 8.4. Storing user profiles 8.5. Adding more data to user profiles 8.6. Encrypting passwords 8.7. Summary 8.8. Exercise 8.8.1. Solution 9. Implementing an authentication service 9.1. Managing a centralized configuration 9.2. Automating initialization and deployment 9.3. Having shared code 9.4. Creating the home page 9.5. Signing up new users 9.6. Validating user emails 9.7. Summary 9.8. Exercise 9.8.1. Solution 10. Adding more features to the authentication service 10.1. Reporting lost passwords 10.2. Resetting passwords 10.3. Logging in users 10.4. Getting AWS credentials for authenticated users 10.5. Changing passwords 10.6. Summary 10.7. Exercise 10.7.1. Solution 11. Building a media-sharing application 11.1. The event-driven architecture 11.1.1. Simplifying the implementation 11.1.2. Consolidating some functions 11.1.3. Evolving an event-driven architecture 11.2. Defining an object namespace for Amazon S3 11.3. Designing the data model for Amazon DynamoDB 11.4. The client application 11.6. Updating content indexes 11.7. Summary 11.8. Exercise 11.8.1. Solution 12. Why event-driven? 12.1. Overview of event-driven architectures 12.2. Starting from the front end 12.3. What about the back end? 12.4. Reactive programming 12.5. The path to microservices 12.6. Scalability of the platform 12.7. Availability and resilience 12.8. Estimating costs 12.9. Summary 12.10. Exercise 12.10.1. Solution Part 3: From Development to Production 13. Improving development and testing 13.1. Developing locally 13.1.1. Developing locally in Node.js 13.1.2. Developing locally in Python 13.2. Logging and debugging 13.3. Using function versioning 13.4. Using aliases to manage different environments 13.5.1. Chalice Python microframework 13.5.2. Apex serverless architecture 13.5.3. Serverless Framework 13.6. Simple serverless testing 13.7. Summary 13.8. Exercise 13.8.1. Solutions 14. Automating deployment 14.1. Storing code on Amazon S3 14.2. Event-driven serverless continuous deployment 14.3. Deploying with AWS CloudFormation 14.4. Multiregion deployments 14.5. Summary 14.6. Exercise 14.6.1. Solutions 15. Automatic infrastructure management 15.1. Reacting to alarms 15.2. Reacting to events 15.3. Processing logs in near real-time 15.4. Scheduling recurring activities 15.5. Multiregion architectures and data synchronization 15.6. Summary 15.7. Exercise 15.7.1. Solutions Part 4: Using external services 16. Calling external services 16.1. Managing secrets and credentials 16.2. Using IFTTT Maker Channel 16.3. Sending messages to a Slack team 16.4. Automating the management of your GitHub repository 16.5. Summary 16.6. Exercise 16.6.1. Solutions 17. Receiving events from other services 17.1. Who’s calling? 17.2. The webhook pattern 17.3. Handling events from Slack 17.4. Handling events from GitHub 17.5. Handling events from Twilio 17.6. Using MongoDB as a trigger 17.7. The log monitoring pattern 17.8. Summary 17.9. Exercise 17.9.1. Solutions

What's inside Create a simple API

Create an event-driven media-sharing application

Secure access to your application in the cloud

Use functions from different clients like web pages or mobile apps

Connect your application with external services

About the reader Requires basic knowledge of JavaScript. Some examples are also provided in Python. No AWS experience is assumed.