Redis (6) publish and subscribe

Redis (6) publish and subscribe

A message communication mode between processes: the sender (pub) sends the message, and the subscriber (sub) receives the message. For example: WeChat subscription account

Subscribe to one or more channels

127.0.0.1:6379> subscribe cctv1 cctv5 vvtv6					#订阅频道
Reading messages... (press Ctrl-C to quit)
1) "subscribe"
2) "cctv1"
3) (integer) 1
1) "subscribe"
2) "cctv5"
3) (integer) 2
1) "subscribe"
2) "vvtv6"
3) (integer) 3
1) "message"
2) "cctv5"
3) "NBA"
1) "message"
2) "cctv1"
3) "news"

127.0.0.1:6379> publish cctv5 NBA							#发送消息
(integer) 1													#成功
127.0.0.1:6379> publish cctv6 superman
(integer) 0													#失败
127.0.0.1:6379> publish cctv1 news
(integer) 1