Redis的發布訂閱

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 是什麼：

　　進程間的一種訊息通訊模式：寄件者（pub）發送訊息，訂閱者（sub）接收訊息。

　　訂閱/發布訊息圖

 

先訂閱後發布後才能收到訊息

1.可以一次性訂閱多個，SUBSCRIBE c1 c2 c3

2.訊息發布，PUBLISH c2 hello-redis

 先訂閱

127.0.0.1:6379> SUBSCRIBE c1 c2 c3
Reading messages... (press Ctrl-C to quit)
1) "subscribe"
2) "c1"
3) (integer) 1
1) "subscribe"
2) "c2"
3) (integer) 2
1) "subscribe"
2) "c3"
3) (integer) 3
1) "message"

發布

127.0.0.1:6379> PUBLISH c2 hello-redis
(integer) 1
127.0.0.1:6379> PUBLISH c1 hello1122
(integer) 1
127.0.0.1:6379>

 

收到訊息

127.0.0.1:6379> SUBSCRIBE c1 c2 c3
Reading messages... (press Ctrl-C to quit)
1) "subscribe"
2) "c1"
3) (integer) 1
1) "subscribe"
2) "c2"
3) (integer) 2
1) "subscribe"
2) "c3"
3) (integer) 3
1) "message"
2) "c2"
3) "hello-redis"
1) "message"
2) "c1"
3) "hello1122"

 

======================

3.訂閱多個，萬用字元*，PSUBSCRIBE new*

4.收取訊息，PUBLISH new1 redis2015

127.0.0.1:6379> PSUBSCRIBE new*
Reading messages... (press Ctrl-C to quit)
1) "psubscribe"
2) "new*"
3) (integer) 1
1) "pmessage"
2) "new*"
3) "new1"
4) "redis2015"
1) "pmessage"
2) "new*"
3) "new2"
4) "redis2016"

 

127.0.0.1:6379> PUBLISH new1 redis2015
(integer) 1
127.0.0.1:6379> PUBLISH new2 redis2016
(integer) 1
127.0.0.1:6379>

 

Redis的發布訂閱