Room Deletion

[adityosnrost]

Hi,

I just would like to know if the room will be deleted automatically when a client / user is no longer on the room / room is empty ?

If not, how can I cleaned up empty rooms ?

Thank You

[miguelgrinberg]

Rooms are not automatically deleted. You can use the close_room() function for that. This function removes all the clients from that room, and then deletes the room.

[adityosnrost]

@miguelgrinberg Thank you so much for your reply.

So, I need to close the room manually. I have some thought on implementing this manual way, like close room when user disconnecting and room is empty.

How do I check if the room is empty ? I see there is no function for that in the documentation.

Regarding to the default room when user connected, I have read that a connected client have socket#id as their default room. is this default room need to close manually like room that we made manually ?

Thank You

[miguelgrinberg]

You can't check if a room is empty unless your application keeps track of who's in each room. This is because Flask-SocketIO is a distributed server, each server process knows about a fraction of the complete state.

There is no need to close the id-based rooms, those go away on their own.

[adityosnrost]

@miguelgrinberg thank you for your explanation.

Maybe I can use the message queue feature from multi worker documentation to track room and user connection. While I am planning to use multi worker and using Redis as message queue, maybe Redis got that information, right ?

May I know what Flask-Socketio store to message queue such as Redis ?

[miguelgrinberg]

Redis is used as a pub/sub provider, there is no data stored there. As I said, the state is partitioned among the many servers, there is no place you can go to see a consolidated state, and for that reason the list of participants in a room cannot be provided. But your application should be able to easily track that down in your own database.

[adityosnrost]

Alright, I see. I understand know, thank you for your amazing explanation. I am building user tracking now.
Thank you so much

[valentin-ballester]

What about server restarts ? Because o keep track using a counter when user connects/disconnect, should i reset the value to 0 when server restart ?

[miguelgrinberg]

@valentin-ballester If your server restart does not involve disconnecting the users gracefully, then yes, you should. Or another method is to have a "last active" timestamp for each user, so after some time of inactivity the user is considered gone.