subscribe

UK[s?b?skra?b] US[s?b?skra?b]

vt.& vi. Subscription; pledge, donation; signature, inscription, signature; subscription, Order

Third person singular: subscribes Present participle: subscribing Past tense: subscribed Past participle: subscribed

redis SUBSCRIBE command syntax

Function:Subscribe to the information of one or more given channels.

Syntax: SUBSCRIBE channel [channel ...]

Available versions: >= 2.0.0

Time complexity: O(N), where N is the number of subscribed channels.

Return: The information received.

redis SUBSCRIBE command example

# 訂閱 msg 和 chat_room 兩個(gè)頻道
# 1 - 6 行是執(zhí)行 subscribe 之后的反饋信息
# 第 7 - 9 行才是接收到的第一條信息
# 第 10 - 12 行是第二條
redis> subscribe msg chat_room
Reading messages... (press Ctrl-C to quit)
1) "subscribe"       # 返回值的類(lèi)型：顯示訂閱成功
2) "msg"             # 訂閱的頻道名字
3) (integer) 1       # 目前已訂閱的頻道數(shù)量
1) "subscribe"
2) "chat_room"
3) (integer) 2
1) "message"         # 返回值的類(lèi)型：信息
2) "msg"             # 來(lái)源(從那個(gè)頻道發(fā)送過(guò)來(lái))
3) "hello moto"      # 信息內(nèi)容
1) "message"
2) "chat_room"
3) "testing...haha"