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                # 2.3 redis訂閱發布模式 Redis訂閱和發布實現了通訊系統,發件人(在 Redis 中的術語稱為發布者)發送郵件,而接收器(訂戶)接收它們。信息傳輸的鏈路稱為通道。Redis 一個客戶端可以訂閱任意數量的通道。 **客戶端C:** 訂閱一個主題 redisChat ```bash 127.0.0.1:6379> SUBSCRIBE redisChat Reading messages... (press Ctrl-C to quit) 1) "subscribe" 2) "redisChat" 3) (integer) 1 ``` **客戶端A:** 針對 redisChat 主題發送 消息,那么所有訂閱該主題的用戶都能夠收到該數據。 ```cpp 127.0.0.1:6379> PUBLISH redisChat "redis is good from A" (integer) 1 ``` **客戶端B:** 針對 redisChat 主題發送 消息,那么所有訂閱該主題的用戶都能夠收到該數據。 ```cpp 127.0.0.1:6379> PUBLISH redisChat "redis is good from B" (integer) 1 ``` 最后客戶端C會收到A和B發送過來的消息。 ```cpp 27.0.0.1:6379> SUBSCRIBE redisChat Reading messages... (press Ctrl-C to quit) 1) "subscribe" 2) "redisChat" 3) (integer) 1 1) "message" 2) "redisChat" 3) "Redis is good from B" 1) "message" 2) "redisChat" 3) "redis is good from A" ```
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