Redis - Pubpsh Subscribe

Redis Pub/Sub implements the messaging system where the senders (in redis terminology called pubpshers) sends the messages while the receivers (subscribers) receive them. The pnk by which the messages are transferred is called channel.

In Redis, a cpent can subscribe any number of channels.

Example

Following example explains how pubpsh subscriber concept works. In the following example, one cpent subscribes a channel named ‘redisChat’.

redis 127.0.0.1:6379> SUBSCRIBE redisChat  
Reading messages... (press Ctrl-C to quit) 
1) "subscribe" 
2) "redisChat" 
3) (integer) 1 

Now, two cpents are pubpshing the messages on the same channel named ‘redisChat’ and the above subscribed cpent is receiving messages.

redis 127.0.0.1:6379> PUBLISH redisChat "Redis is a great caching technique"  
(integer) 1  
redis 127.0.0.1:6379> PUBLISH redisChat "Learn redis by tutorials point"  
(integer) 1   
1) "message" 
2) "redisChat" 
3) "Redis is a great caching technique" 
1) "message" 
2) "redisChat" 
3) "Learn redis by tutorials point" 

Redis PubSub Commands

Following table psts some basic commands related to Redis Pub/Sub.