Python's subscription publishing feature for Redis operations

Installing Redis-server

Yum-y Install gcc gcc-c++ #安装编译工具

Cd/opt

Wget-c http://download.redis.io/releases/redis-3.0.5.tar.gz #下载包

Tar XF redis-3.0.5.tar.gz #解压

CD redis-3.0.5

Make MALLOC=LIBC #编译

Make Prefix=/usr/local/redis Install #安装

Echo ' Path=/usr/local/redis/bin: $PATH ' >>/etc/profile #配置环境变量

Source/etc/profile #或. /etc/profile

Mkdir/usr/local/redis/conf #创建目录

cp/opt/redis-3.0.5/redis.conf/usr/local/redis/conf/#拷贝配置文件

Sed-i "46s#/var/run/redis.pid#/usr/local/redis/conf/redis.pid#"/usr/local/redis/conf/redis.conf

Sed-i "192s#./#/usr/local/redis/conf/#"/usr/local/redis/conf/redis.conf

Sed-i 509s/no/yes//usr/local/redis/conf/redis.conf

Nohup redis-server/usr/local/redis/conf/redis.conf &>/dev/null &

echo vm.overcommit_memory = 1 >>/etc/sysctl.conf

Sysctl-p

lsof-i:6379 #查看端口有没有起来

Install the PIP command Dependency package

wget http://pypi.python.org/packages/source/s/setuptools/setuptools-0.6c11.tar.gz--no-check-certificate

CD SETUPTOOLS-0.6C11

Python setup.py Build

Python setup.py Install

Install the PIP command

wget "HTTPS://PYPI.PYTHON.ORG/PACKAGES/SOURCE/P/PIP/PIP-1.5.4.TAR.GZ#MD5=834B2904F92D46AAA333267FB1C922BB"-- No-check-certificate

Tar XF pip-1.5.4.tar.gz

CD pip-1.5.4

Python setup.py Install

Installing the Python API for Redis

Pip Install Redis

Test

[[email protected] opt]# python

Python 2.6.6 (r266:84292, Nov 22 2013, 12:16:22)

[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2

Type "Help", "copyright", "credits" or "license" for more information.

>>> Import Redis

>>> r = Redis. Redis (host= ' 10.211.55.4 ', port=6379)

>>> r.set (' foo ', ' Bar ')

>>> print r.get (' foo ')

"Bar"

[Email protected] opt]# REDIS-CLI

127.0.0.1:6379> get foo

"Bar"

Redis Subscription and publishing features demo

[email protected] opt]# cat redishelper.py

#!/usr/bin/env python

#coding: Utf-8

Import Redis

Class Redishelper:

def __init__ (self):

Self.__conn = Redis. Redis (host= ' 127.0.0.1 ')

self.chan_sub = ' fm87.7 ' #订阅频道

self.chan_pub = ' fm87.7 ' #接收频道

def get (Self,key):

return Self.__conn.get (Key)

def set (Self,key,value):

Self.__conn.set (Key,value)

def public (self,msg): #在chan_pub这个频道发布消息

Self.__conn.publish (SELF.CHAN_PUB,MSG)

Return True

def subscribe (self): #订阅接收

Pub = Self.__conn.pubsub () #打开收音机

Pub.subscribe (self.chan_sub) #订阅频道

Pub.parse_response () #等待消息

Return pub #开始接收

if __name__ = = ' __main__ ':

t = Redishelper ()

T.public (' Test ') #发布了test这个消息

Execute script at one end

Python redishelper.py

View at the other end

>>> Import Redishelper

>>> r = Redishelper. Redishelper ()

>>> R.subscribe ()

<redis.client.pubsub Object at 0x7f1789422950>

>>> recv = R.subscribe ()

>>> Recv.parse_response ()

[' Message ', ' fm87.7 ', ' Test ']

Custom-made reading demo 2

#在一个终端打开这个

>>> Import Redis

>>> r = Redis. Redis (host= ' 127.0.0.1 ')

>>> chan = r.pubsub () #打开频道

>>> chan.subscribe ("fm100") #调到该频道

>>> Chan.parse_response () #测试监听频道

[' subscribe ', ' fm100 ', 1L]

>>> Chan.parse_response () #再次执行成阻塞状态等待消息的到来

>>> while True: #写成死循环

... chan.parse_response ()

Open a publish message at another terminal

>>> Import Redis

>>> p = Redis. Redis (host= ' 127.0.0.1 ')

>>> p.publish (' fm100 ', ' hellow world!!! ')

1L

Back before that terminal found already out message

>>> while True:

... chan.parse_response ()

...

[' Message ', ' fm100 ', ' hellow world!!! ']

This article is from the "Wsyht90 blog" blog, make sure to keep this source http://wsyht90.blog.51cto.com/9014030/1845888

Python's subscription publishing feature for Redis operations