發布訂閱模式 Redis實現

python開發——實現redis中的發布訂閱功能

redis中的發布/訂閱模型是一種消費通訊模式，下面將對這一功能進行python**的實現。

from redis import strictredis

class
redishelper
(object):
'''  封裝redis發布訂閱類 '''
def__init__
(self)
:        self.conn = strictredis(host=
'localhost'
, port=
6379
)        self.sub_chanle =
'books'
defpublish
(self, msg)
:''' 發布訊息'''
self.conn.publish(self.sub_chanle, msg)
defsubscribe
(self)
:''' 獲取訊息'''
pub = self.conn.pubsub(
)        pub.subscribe(self.sub_chanle)
return pub

from pubsub import redishelper

obj = redishelper(
)for i in
range(5
):obj.publish(f'hello_'
)

from pubsub import redishelper

obj = redishelper(
)sub = obj.subscribe(
)while
true
:    msg = sub.listen(
)for i in msg:
if i[
'type']==
'message'
:print
(str
(i['channel'
], encoding=
'utf-8')+
':'+
str(i[
'data'
], encoding=
'utf-8'))
elif i[
'type']==
'subscribe'
:print
(str
(i['channel'
], encoding=
'utf-8'
))

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