Python16_day11 "MQ, Redis, Memcache"

First, RabbitMQ

is a complete, reusable enterprise messaging system based on AMQP. He follows the Mozilla Public License open source agreement.

MQ is all called the message queue, and Message Queuing (MQ) is an application-to-application communication method. Applications communicate by reading and writing messages to and from the queue (data for the application), without requiring a dedicated connection to link them. Message passing refers to the process of communicating between programs by sending data in a message, rather than by directly invoking each other, and directly invoking techniques such as remote procedure calls. Queuing refers to an application communicating through a queue. The use of queues removes the requirement that both the receiving and sending applications execute concurrently.

　　1.RabbitMQ Install

1 installation configuration Epel source 2    $ RPM-IVH http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8. noarch.rpm3  4  Install Erlang5    $ yum-y install Erlang6  7  Install RABBITMQ8    $ yum-y Install Rabbitmq-server
　　

Note: Service Rabbitmq-server start/stop

　　2. Python API Install　　

1 pip Install Pika 2 or 3 Easy_install Pika 4 or 5 Source Code 6 Https://pypi.python.org/pypi/pika

3. Realization of production consumption model based on queue

1 ImportQueue2 ImportThreading3 4 5Message = Queue.queue (10)6 7 8 defproducer (i):9      whileTrue:Ten message.put (i) One  A  - defConsumer (i): -      whileTrue: themsg =Message.get () -  -  -  forIinchRange (12): +t = Threading. Thread (Target=producer, args=(i,)) - T.start () +  A  forIinchRange (10): att = Threading. Thread (Target=consumer, args=(i,)) -T.start ()

　　4. Based on RABBITMQ

For RABBITMQ, production and consumption no longer target a queue object in memory, but rather a message queue implemented by RABBITMQ server on a single server.

1 ImportPika2  3 ########################## producer #########################4  5Connection =Pika. Blockingconnection (Pika. Connectionparameters (6host='localhost'))7Channel =Connection.channel ()8  9Channel.queue_declare (queue='Hello')Ten   OneChannel.basic_publish (exchange="', Arouting_key='Hello', -body='Hello world!') - Print("[x] Sent ' Hello world! '") the connection.close () -  -  -   + ########################### Consumer ########################## -Import Pika +Connection =Pika. Blockingconnection (Pika. Connectionparameters ( Ahost='localhost')) atChannel =Connection.channel () -   -Channel.queue_declare (queue='Hello') -   - defCallback (ch, method, properties, body): -     Print("[x] Received%r"%body) in   - Channel.basic_consume (Callback, toQueue='Hello', +no_ack=True) -   the Print('[*] waiting for messages. To exit Press CTRL + C') *Channel.start_consuming ()

Python16_day11 "MQ, Redis, Memcache"