Note, this is a slightly abstract question.
Given the following:
- A product that requires to notify customers 15, 10, and 5minutes before an scheduled time
- Scheduled times are very specific, and there maybe large clusters of notifications around a scheduled time (e.g. 6:04pm, 7:31pm)
Whats the best architectural choice? I've not kept up with the latest back-end choices.
Things I've looked at:
- Amazon Simple Queuing service for storing of the "messages"
- This doesn't seem to have ability to "Delay" delivery of messages
- Requires long polling/constant polling, which seems partially in efficient
- Azure Queues
- Allows delays of messages up to 7 hrs
- Still requires long polling
- setTimeout in Node
- Seems unreliable for many close related time points, and likely going to just get baffling managing them all
- Wake up every minute and suck from the queue
What is the recommended pattern for a problem like this?
