For every socket connection the user makes we add the socket instance to a room dedicated for this user.
Socket io rooms redis.
Prefix namespace room prefix.
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.
For global broadcasts the channel name is.
One thing to keep in mind while using rooms is.
These channels are called rooms.
Default value is socket io.
Socket on disconnect function console log io sockets adapter rooms.
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.
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.
Socket io rooms a much better approach can be to use socket io rooms to maintain the individual connections for a user.
The socket io redis adapter broadcasts and receives messages on particularly named redis channels.
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.
Prefix namespace in broadcasting to a single room the channel name is.
The base channel name.
This is the adapter using the redis pub sub mechanism to broadcast messages between multiple nodes.
296 opened nov 19 2018 by cschwaderer the function that takes a list of sockets in a room takes a long time.
Rooms also share the same socket connection like namespaces.
To facilitate this use case we created two modules.
There are several ways to tackle this problem like implementing your own channel to send messages into the process.
Once socket io establishes connection we used the redis client to subscribe to chatmessages and activeusers channels.
This is the default socket io in memory adapter class.
We checked for any message event triggered by a published message.
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.
