AWS S3 Event Notification: Triggering Lambda, SQS, and SNS | AWS S3 Event Notification Explained! 🚀

🚀 Master AWS & Java Today!

Join the Ram N Java community for more easy-to-follow cloud tutorials.

SUBSCRIBE NOW

What are AWS S3 Event Notifications?

AWS S3 Event Notifications are like setting an alarm for your storage bucket. They allow you to get notified automatically whenever something happens in your S3 bucket—like uploading a new file or deleting an old one—so you can trigger actions in other AWS services immediately.

How Do They Work?

The process is simple and powerful:

• Detection: The S3 bucket detects an action (like a file upload).
• Trigger: It creates a notification message about that event.
• Delivery: The event is sent to your chosen destination (Lambda, SQS, or SNS).
• Action: The receiving service processes the event, such as a Lambda function resizing an image or an SNS topic sending an alert.

Why Use Event Notifications?

• Automation: Process files as soon as they are uploaded (e.g., resizing images).
• Tracking: Keep a real-time record of every change made to your bucket.
• Integration: Connect your storage directly to your application logic without manual checks.

Step-by-Step Setup Guide

1. Create Destination: Set up your target service first (e.g., an SQS Queue).
2. Configure Permissions: Update the target service's policy to allow S3 to send messages to it.
3. Enable S3 Event: In the S3 Console, go to Properties > Event Notifications and click Create event notification.
4. Select Events: Choose which actions to monitor (like "All object create events").
5. Save and Test: Upload a file to your bucket and watch the notification arrive at your destination!

Free Resources:

Check the YouTube video description for links to the Java source code and PowerPoint presentation used in this guide!