What is the MOST operationally efficient solution that meets these requirements?
Integrate the client with an API Gateway WebSocket API. Save the user-uploaded files with the WebSocket connection ID. Push the validation status to the connection ID when the processing is complete to initiate an update of the user interface.
Launch an Amazon EC2 micro instance, and set up a WebSocket server. Send the user-uploaded file and user detail to the EC2 instance after the user uploads the file. Use the WebSocket server to send updates to the user interface when the uploaded file is processed.
Save the user’s email address along with the user-uploaded file. When the validation process is complete, send an email notification through Amazon Simple Notification Service (Amazon SNS) to the user who uploaded the file.
Save the user-uploaded file and user detail to Amazon DynamoDB. Use Amazon DynamoDB Streams with Amazon Simple Notification Service (Amazon SNS) push notifications to send updates to the browser to update the user interface.
Explanations:
Integrating the client with an API Gateway WebSocket API allows for real-time communication. When the validation process is complete, the application can push updates to the specific user’s connection ID, enabling immediate updates to the dashboard without the need for page refresh. This is the most efficient and responsive solution for user experience.
Setting up an Amazon EC2 micro instance to host a WebSocket server introduces additional operational complexity and management overhead. It requires managing server uptime, scaling, and maintenance, which is less efficient compared to using AWS managed services. Furthermore, it may not provide the same real-time responsiveness as the API Gateway WebSocket option.
Sending email notifications through Amazon SNS is a delayed approach, as it does not provide real-time updates to the user interface. Users would still need to check their email and manually refresh the dashboard for status updates, which does not meet the requirement for immediate updates.
Using DynamoDB Streams with SNS push notifications could work, but it adds complexity and does not provide direct, real-time updates to the user’s dashboard. Instead, it relies on polling or additional mechanisms to update the user interface, which may not meet the requirement for immediate status reflection.
I believe the answer is:
Integrate the client with an API Gateway WebSocket API. Save the user-uploaded files with the WebSocket connection ID. Push the validation status to the connection ID when the processing is complete to initiate an update of the user interface.