DAY12 thread pool, RABBITMQ, and SQLAlchemy

1, with implementation of context management

#！ /usr/bin/env python
#-*-Coding:utf-8-*-
# Author:wanghuafeng


#with实现上下文管理
Import Contextlib
@contextlib. ContextManager
def worker_state (self, State_list, worker_thread):
    """
    Used to record the number of threads waiting in a thread
    :p Aram Self:
    :p Aram State_list:
    :p Aram Worker_thread:
    : return:
    """
    #第二步
    State_list.append (Worker_thread)
    Try
        #第三步
        Yield
    Finally
        #执行第五步
        State_list.remove (Worker_thread)

Free_list = []
Current_thread = "Wang"
#第一步执行with, call the Worker_state method
With Worker_state (Free_list, Current_thread):
    #第四步
    Print (123)
    Print (456)
    #执行完成出去的瞬间

2. With implementation Socket context

#！ /usr/bin/env python
#-*-Coding:utf-8-*-
# Author:wanghuafeng


Import Contextlib
Import socket

@contextlib. ContextManager
def context_socket (host, Port):
    SK = Socket.socket ()
    Sk.bind ((host, Port))
    Sk.listen (5)
    Try
        Yield SK
    Finally
        Sk.close ()

With Context_socket (' 127.0.0.1 ', 8888) as sock:
    Print (sock)

3. Redis Connection Pool

Import Redis
Pool = Redis. ConnectionPool (host= ' 192.168.195.128 ', port=6379)
R = Redis. Redis (Connection_pool=pool)
Pipe = R.pipeline (transaction=true)
R.set (' name ', ' Wanghuafeng ')
R.set (' role ', ' haha ')
t = Pipe.execute ()
Print (R.get (' role '))

4. Redis Publish, Subscribe

Import Redis

Class Redishelper:
    def __init__ (self):
        Self.__conn = Redis. Redis (host= ' 192.168.195.128 ')
        self.chan_sub = ' FM98.8 '
        self.chan_pub = ' FM98.8 '

    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

#！ /usr/bin/env python
#-*-Coding:utf-8-*-
# Author:wanghuafeng


From MONITOR.S22 import Redishelper

obj = Redishelper ()
Redis_sub = Obj.subscribe ()

While True:
    msg = Redis_sub.parse_response ()
    Print (msg)

#！ /usr/bin/env python
#-*-Coding:utf-8-*-
# Author:wanghuafeng


From MONITOR.S22 import Redishelper

obj = Redishelper ()
Obj.public (' helo ')

5, RabbitMQ

#！ /usr/bin/env python
#-*-Coding:utf-8-*-
# Author:wanghuafeng

Import Pika

# ######################### producer #########################

Connection = Pika. Blockingconnection (Pika. Connectionparameters (
    host= ' localhost '))
Channel = Connection.channel ()

Channel.queue_declare (queue= ' Hello ')

Channel.basic_publish (exchange= ",
                      routing_key= ' Hello ',
                      body= ' Hello world! ')
Print ("[x] Sent ' Hello world! '")
Connection.close ()

#！ /usr/bin/env python
#-*-Coding:utf-8-*-
# Author:wanghuafeng


Import Pika

# ########################## Consumer ##########################

Connection = Pika. Blockingconnection (Pika. Connectionparameters (
    host= ' localhost '))
Channel = Connection.channel ()

Channel.queue_declare (queue= ' Hello ')


DEF callback (ch, method, properties, body):
    Print ("[x] Received%r"% body)


Channel.basic_consume (Callback,
                      Queue= ' Hello ',
                      No_ack=true)

Print (' [*] waiting for messages. To exit Press CTRL + C ')
Channel.start_consuming ()

DAY12 thread pool, RABBITMQ, and SQLAlchemy