Redis的管道,发布订阅
4、管道
redis-py默认在执行每次请求都会创建(连接池申请连接)和断开(归还连接池)一次连接操作,如果想要在一次请求中指定多个命令,则可以使用pipline实现一次请求指定多个命令,并且默认情况下一次pipline 是原子性操作。
#!/usr/bin/env python # -*- coding:utf-8 -*- import redis pool = redis.ConnectionPool(host='10.211.55.4', port=6379) r = redis.Redis(connection_pool=pool) # pipe = r.pipeline(transaction=False) pipe = r.pipeline(transaction=True) pipe.set('name', 'alex') pipe.set('role', 'sb') pipe.execute()
5、发布订阅
发布者:服务器
订阅者:Dashboad和数据处理
Demo如下:
#!/usr/bin/env python # -*- coding:utf-8 -*- import redis class RedisHelper: def __init__(self): self.__conn = redis.Redis(host='10.211.55.4') self.chan_sub = 'fm104.5' self.chan_pub = 'fm104.5' def public(self, msg): self.__conn.publish(self.chan_pub, msg) return True def subscribe(self): pub = self.__conn.pubsub() pub.subscribe(self.chan_sub) pub.parse_response() return pub
订阅者:
#!/usr/bin/env python # -*- coding:utf-8 -*- from monitor.RedisHelper import RedisHelper obj = RedisHelper() redis_sub = obj.subscribe() while True: msg= redis_sub.parse_response() print msg
发布者:
#!/usr/bin/env python # -*- coding:utf-8 -*- from monitor.RedisHelper import RedisHelper obj = RedisHelper() obj.public('hello')
更多参见:https://github.com/andymccurdy/redis-py/
http://doc.redisfans.com/