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