how to implement facebook like notification?

Question

I am trying to implement a Facebook-like live notifications system to notify users whenever someone adds them as friend, like their post or posts replies to their comments.

Answer 1

You basically set a request up, like callng the service that asks your server/db for the notifications of that user. You may do a while loop that retries if theres no notification (maybe Thread.Sleep in between searches). Your js request will timeout, then you can call the function again in timeout. This means long polling afaik