How does one design a system to deliver scheduled notifications?

Question

Every week at work I get a bunch of reminders which I schedule in apps like Slack, Google Calendar, etc. These notifications arrive always within the minute that I scheduled and it always impresses me! Delightful!I want to learn about how a this type of system is designed. I've searched a lot, but haven't yielded anything about systems that handle scheduled notifications.Some wonderings: - What is the name given to these types of systems (if any)? - How does one design a system like this? - Are there any open source projects I can learn from?

PaulHoule · Accepted Answer

As an applications programmer in a hurry I would do this by using something like
https://aws.amazon.com/sqs/
A desktop application could connect to SQS directly, a web application would need to have a websocket server that catches notifications.

new_guy · Answer

Just a simple cron job?

How does one design a system to deliver scheduled notifications?

As an applications programmer in a hurry I would do this by using something likehttps://aws.amazon.com/sqs/A desktop application could connect to SQS directly, a web application would need to have a websocket server that catches notifications.

Just a simple cron job?

As an applications programmer in a hurry I would do this by using something like
https://aws.amazon.com/sqs/
A desktop application could connect to SQS directly, a web application would need to have a websocket server that catches notifications.