學習redis的訂閱/發佈

 

練習：

1. 1.首先訂閱名爲「redisChannel」的通道：

2. 命令爲： subscribe channel

                publish channel message

➜  ~ redis-cli -h 127.0.0.1 -p 6379
127.0.0.1:6379> subscribe redisChannel
Reading messages... (press Ctrl-C to quit)
1) "subscribe"
2) "redisChannel"
3) (integer) 1
1) "message"
2) "redisChannel"
3) "Today is Friday"
1) "message"
2) "redisChannel"
3) "\xe5\x85\xb3\xe5\x85\xb3"
1) "message"
2) "redisChannel"
3) "gholly"

2.而後新建一個客戶端，往redisChannel通道發消息

➜  ~ redis-cli -h 127.0.0.1 -p 6379
127.0.0.1:6379> publish redisChannel "Today is Friday"
(integer) 1
127.0.0.1:6379> publish redisChannel "關關"
(integer) 1
127.0.0.1:6379> publish redisChannel "gholly"
(integer) 1
127.0.0.1:6379>

3.嘗試同時訂閱多個通道channel，

127.0.0.1:6379> subscribe channel3 hh guanguan     #表示訂閱了guanguan hh channel3這3個通道
Reading messages... (press Ctrl-C to quit)
1) "subscribe"
2) "channel3"
3) (integer) 1
1) "subscribe"
2) "hh"
3) (integer) 2
1) "subscribe"
2) "guanguan"
3) (integer) 3
1) "message"
2) "channel3"
3) "I am channel3"
1) "message"
2) "hh"
3) "I am hh"
1) "message"
2) "guanguan"
3) "I am guanguan"





--------------------
127.0.0.1:6379> publish channel3 "I am channel3"         #分別向這個3個通道發消息
(integer) 1
127.0.0.1:6379> publish hh "I am hh"
(integer) 1
127.0.0.1:6379> publish guanguan "I am guanguan"
(integer) 1
127.0.0.1:6379> publish gholly "I am gholly"
(integer) 0
127.0.0.1:6379>



二者可通訊，可利用redis的訂閱發佈功能進行消息的即時推送功能

4.pubsub 查看全部訂閱狀況

127.0.0.1:6379> pubsub channels
1) "guanguan"
2) "hh"
3) "channel3"

5.psubscribe --訂閱給定模式的一個或多個channel

127.0.0.1:6379> psubscribe gg.*          --是指訂閱以gg.開頭的channel
Reading messages... (press Ctrl-C to quit)
1) "psubscribe"
2) "gg.*"
3) (integer) 1
1) "pmessage"
2) "gg.*"
3) "gg."
4) "hhhhh"
1) "pmessage"
2) "gg.*"
3) "gg.hf"
4) "hhhhh"



---發佈
127.0.0.1:6379> publish gg "hhhhh"
(integer) 0
127.0.0.1:6379> publish gg. "hhhhh"
(integer) 1
127.0.0.1:6379> publish gg.hf "hhhhh"
(integer) 1
127.0.0.1:6379>

6.unsubscribe 退訂通道

127.0.0.1:6379> unsubscribe hh
1) "unsubscribe"
2) "hh"
3) (integer) 0

7.punsubscribe 退訂指定模式的通道

127.0.0.1:6379> punsubscribe gg.*
1) "punsubscribe"
2) "gg.*"
3) (integer) 0