Which solution will meet these requirements?
Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure S3 event notifications with a destination of the SNS topic. Subscribe the Lambda function to the SNS topic. Create an email notification subscription to the SNS topic.
Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure S3 event notifications with a destination of the SNS topic. Subscribe the Lambda function to the SNS topic. Create an Amazon Simple Queue Service (Amazon SQS) queue. Subscribe the SQS queue to the SNS topic. Create an email notification subscription to the SQS queue.
Create an Amazon Simple Queue Service (Amazon SQS) queue. Configure S3 event notifications with a destination of the SQS queue. Subscribe the Lambda function to the SQS queue. Create an email notification subscription to the SQS queue.
Create an Amazon Simple Queue Service (Amazon SQS) queue. Send S3 event notifications to Amazon EventBridge. Create an EventBridge rule that runs the Lambda function when images are uploaded to the S3 bucket. Create an EventBridge rule that sends notifications to the SQS queue. Create an email notification subscription to the SQS queue.
Explanations:
This option correctly utilizes Amazon SNS to handle both the image processing and email notification requirements. By configuring S3 event notifications to trigger the SNS topic, the Lambda function can be subscribed to process the image and create the thumbnail. Additionally, an email notification subscription can be added to the SNS topic, allowing for direct email notifications upon image upload.
While this option starts correctly by using an SNS topic for S3 event notifications and subscribing the Lambda function, it adds unnecessary complexity by introducing an SQS queue. The Lambda function should process the images directly from the SNS topic rather than from an SQS queue, as it complicates the flow and isn’t required for email notifications.
This option suggests using an SQS queue for S3 event notifications, which is not necessary for this use case. The Lambda function should be invoked directly from the S3 event notifications or SNS topic, making this setup less efficient. Email notifications are also not included in this option, which does not meet the requirements.
This option introduces unnecessary complexity by using EventBridge and an SQS queue. Although it does allow for the processing of images and sending notifications, the added components (EventBridge and SQS) are not needed for this scenario. The use of SNS directly for email notifications is a simpler and more straightforward approach.
If memory serves me right, the answer is:
Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure S3 event notifications with a destination of the SNS topic. Subscribe the Lambda function to the SNS topic. Create an email notification subscription to the SNS topic.