Redis middleware (subscription)

What is message-oriented middleware? The publishing and subscription of point-to-point message-oriented middleware is asynchronous communication.

Case: Use redis for publishing and subscription

Redis publish and subscribe

 

Redis pub/sub is a message communication mode: the sender (pub) sends messages, and the subscriber (sub) receives messages.

Redis clients can subscribe to any number of channels.

Shows the relationship between channel channel1 and the three clients that subscribe to the channel-Client2, client5, and Client1:

 

When a new message is sent to channel channel1 through the publish command, the message is sent to the three clients that subscribe to it:

 

Client2 publishes topics channel1 client5 and Client1 subscribe to topics

Client2 publishes a topic, and other topics are subscribed to and consumed.

 

How does one implement the publish/subscribe function?

Connect two redis clients,

First, create a channel:

Enable another client to send values to this channel

Observe the first client:

Publish a subscription

Producer and consumer

 

Redis middleware (subscription)