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A short class with Sarah and her students. The other ways are under More.
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Let's start our session by understanding what AWS Lambda is. Can anyone tell me what you think Lambda does?
It's a serverless computing service that runs code without managing servers, right?
Exactly! AWS Lambda lets you run code in response to events. What kind of events do you think can trigger these actions?
Maybe when a file is uploaded or something changes?
Great points! We often think of event sources like S3 file uploads or changes in DynamoDB. Let's remember: S3 for storage. Can anyone create a mnemonic for that?
How about 'S3 Saves Stuff'?
I love it! So what else might trigger a Lambda function? Any other ideas?
HTTP requests through API Gateway?
Yes, perfect! You all are doing great. Remember, API Gateway is a door for your Lambda functions to receive HTTP calls!
Let’s dive deeper into each event source. What happens when you upload a file to S3?
It can trigger a Lambda function to process the file?
Exactly! This can be used to create thumbnails or extract metadata. Now, can someone explain changes in a DynamoDB table?
Whenever there's an insert or update, it triggers a Lambda function to keep the data consistent.
Well stated! What about the role of API Gateway in this process?
It routes HTTP requests to Lambda, allowing applications to interact with AWS services.
Correct again! API Gateway can create RESTful APIs for triggering Lambda functions. Lastly, what are scheduled events?
Like cron jobs that run functions at specific times!
Nice! Scheduled events help in executing Lambda functions automatically. In summary, can someone recap the four event sources we've covered?
S3 uploads, DynamoDB changes, API Gateway requests, and scheduled events!
Great summary! You all are really grasping this concept!
When you upload to S3, Lambda will process so blissfully!
Imagine a chef (Lambda) waiting for orders (events) from different sources (S3, DynamoDB) to serve dishes (executing code) at the right time.
Remember 'SADPS' for sources: S3, API Gateway, DynamoDB, Scheduled events.
Use 'LASER' to recall Lambda event sources: L for Lambda, A for API Gateway, S for S3, E for events, R for responses.
Term
What triggers a Lambda function?
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Term
What does AWS Lambda do?
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A serverless compute service that allows running code in response to events without provisioning or managing servers.
Simple Storage Service, an object storage service that stores data in buckets.
A fully managed NoSQL database service that provides fast and predictable performance.
A service for creating, publishing, maintaining, monitoring, and securing REST, HTTP, and WebSocket APIs.
Events that trigger Lambda functions at specified time intervals, similar to cron jobs.
This section covers the common event sources that can trigger AWS Lambda functions, demonstrating the ease of responding to various data-driven events in a serverless architecture.
AWS Lambda is a serverless computing service that executes code in response to specific triggers. This section discusses typical event sources such as file uploads to Amazon S3, changes in DynamoDB, HTTP requests through API Gateway, and scheduled events, illustrating how Lambda handles these events efficiently without the need for server management.
AWS Lambda enables developers to run code in response to various events without the need to manage servers. This functionality is triggered by several typical event sources, allowing developers to build efficient and responsive applications. The key event sources include:
The ability to leverage these event sources effectively allows developers to create responsive, automated workflows without server overhead, making AWS Lambda a central utility in serverless computing.