如何构建一个自毁的聊天应用服务器？

Question

I'm making a chat app server with self destructing chat room feature. I have to reset the timer after the last chat, and when the timer runs out I have to blow up the chat room. The important thing is that I have to send push notifications to users when the chat room is gone, and to record the deletion time in the DB(PostgreSQL).

I tried to use Redis' expire, but I'm not sure it is possible to implement the push service. I should also consider that my server must be able to scale out. Do you have any good ideas?

Thank you very much.

Answer 1

• you can use expire to schedule deletion of a chat room
• you can use notify-keyspace-events and watch for expire message to send notifications to user and record deletion time to db (example: Listen for changes in redis list )
• scaling should be easy with redis as it's quite mature