redis订阅与发布(把redis作为消息中间件)

订阅频道
127.0.0.1:6379> subscribe chat1
Reading messages... (press Ctrl-C to quit)
1) "subscribe"
2) "chat1"
3) (integer) 1
1) "message"
2) "chat1" // 订阅频道后当前线程处于阻塞状态
3) "Hello World"
1) "message"
2) "chat1"
3) "OK"

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发布消息
127.0.0.1:6379> publish chat1 "Hello World"
(integer) 1
127.0.0.1:6379> publish chat1 OK
(integer) 1

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查看订阅与发布
127.0.0.1:6379> pubsub channels
1) "chat1"

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查看某个频道的订阅数量
127.0.0.1:6379> pubsub numsub chat1
1) "chat1"
2) (integer) 1

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退订频道
127.0.0.1:6379> unsubscribe chat1(Ctrl+C)

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退订指定模式的一组频道
127.0.0.1:6379> punsubscribe java.*(Ctrl+C)

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订阅指定模式的一组频道
psubscribe java.*
发布消息
127.0.0.1:6379> publish java.io "This is a java.io message"
发布消息
127.0.0.1:6379> publish java.file "This is a java.file message"