https://app.pluralsight.com/library/courses/aws-developer-introduction-aws-lambda/

Course Overview

• Serverless application development

Understanding Serverless Functions

Contextualizing Serverless

Key Elements of Serverless Functions

• Event examples: File uploads, scheduled times, API requests

• Benefits: cost and utilisation - only pay for the time the function is running and not the time the operating system has to be available managed machines - no need to focus on the operating system management service integrations - send/receive emails, service requests scaling - simple scaling

• Drawbacks: debugging can be difficult control - lack of control of operating system (where required)

• Why learn lambda? Focus on application code; IoT (largely event-driven); growing relevance

• How is Lambda Used? stream data processing; easy and scalable APIs, photo processing; integration into web apps

Looking at Serverless Function Providers

• AWS, Microsoft Azure
• AWS has built-in versioning of functions but supports fewer languages natively (Python, Node.js, Java, C# and Node shims of other languages) and a 5 minute running time limit
• AWS lambdas can only be run on AWS, Azure Functions can be run on your own host

Demo Overviews - What Are You Building?

• Interval-triggered function that checks the status of the website and submits results
• Tweet messages at random intervals using Twitter API
• Cron job that sends scheduled emails

Working with AWS

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Starting with Lambda Functions