Socket on disconnect function console log io sockets adapter rooms.
Socket io rooms redis.
Socket io rooms a much better approach can be to use socket io rooms to maintain the individual connections for a user.
For every socket connection the user makes we add the socket instance to a room dedicated for this user.
Rooms are used to further separate concerns.
We then broadcasted the message with socket io using message event for messages from chatmessage channel and users event for messages from activeusers channel.
For global broadcasts the channel name is.
This is the adapter using the redis pub sub mechanism to broadcast messages between multiple nodes.
In some cases you might want to emit events to sockets in socket io namespaces rooms from outside the context of your socket io processes.
The base channel name.
Creating a real time chat app with redis node js and socket io if you have redis node js and the heroku toolbelt installed on your machine then you ve got everything you need to build a real.
Default value is socket io.
Prefix namespace room prefix.
This is the default socket io in memory adapter class.
This module is not intended for end user usage but can be used as an interface to inherit from from other adapters you might want to build like socket io redis.
These channels are called rooms.
One thing to keep in mind while using rooms is.
The socket io redis adapter broadcasts and receives messages on particularly named redis channels.
Once socket io establishes connection we used the redis client to subscribe to chatmessages and activeusers channels.
We checked for any message event triggered by a published message.
Let s call the room room josh.
Within each namespace you can also define arbitrary channels that sockets can join and leave.
Prefix namespace in broadcasting to a single room the channel name is.
The rooms that the socket which is disconnecting from still appear in the print out yet their values will appear as empty arrays indicating no remaining users.
Rooms also share the same socket connection like namespaces.
296 opened nov 19 2018 by cschwaderer the function that takes a list of sockets in a room takes a long time.
