Detailed description of RabbitMQ operation graphic code in Python

Knowledge preparation RabbitMQRabbitMQ is a complete and reusable enterprise message system based on AMQP. MQMQ is called MessageQueue. message queue (MQ) is a communication method for applications.

Knowledge preparation RabbitMQ

RabbitMQ is a complete and reusable enterprise message system based on AMQP.

MQ

MQ is called Message Queue. MQ is a communication method for applications.
Through message queue communication, services A and B are maintained with low coupling between each other to achieve flexible business expansion.

Pika

Pika is the official Python AMQP library written by the RabbitMQ team.

Install and start

$ brew install rabbitmq$ usr/local/sbin/rabbitmq-server

Install pika

pip install pika

Hello Worldsender

# coding: utf-8import pikaconnection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))channel = connection.channel()channel.queue_declare(queue='hello')channel.basic_publish(exchange='',                      routing_key='hello',                      body='Hello, World!')print 'send msg: Hello World!'connection.close()

Cycler

# coding: utf-8import pikaconnection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))channel = connection.channel()channel.queue_declare(queue='hello')def callback(ch, method, properties, body):    print 'receive msg: %s' % bodychannel.basic_consume(callback,                      queue='hello',                      no_ack=False)print 'waiting for msg...'channel.start_consuming()

Running result:

# Sender. py run twice send msg: Hello World! # Receiverwaiting for msg... receive msg: Hello, World! Receive msg: Hello, World!

After the consumer processes the message and does not quit, the consumer can still process the subsequent message.

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