Redis publish/subscribe

Redis implements a publish/subscribe messaging mechanism.

The concept is simple: the publisher sends a message on the channel. Multiple subscribers received it.

Subscribe to channel use

SUBSCRIBE <channel>

Publish to a channel using

PUBLISH <channel> <message>

Example:

SUBSCRIBE dogs

In another redis-cli window, type:

PUBLISH dogs "Roger"

Messages will be sent to the subscribers, and they’ll by default display the kind of event, the channel, and the message:

Subscribers can listen on multiple channels:

SUBSCRIBE dogs cats

and will receive messages coming from all of them.


More redis tutorials: