RabbitMQ : Use on Python2020/04/17

	This is an example to use RabbitMQ on Python.
[1]	Install AMQP client library.

# install from EPEL

[root@dlp ~]#

dnf --enablerepo=epel -y install python3-pika

[2]	This is an example of sending message on Python. For example, connect with RabbitMQ on [localhost] with a user [serverworld], virtualhost [my_vhost].

[cent@dlp ~]$

vi send_msg.py

import pika

credentials = pika.PlainCredentials('serverworld', 'password')
connection = pika.BlockingConnection(pika.ConnectionParameters(
                                     'localhost',
                                     5672,
                                     '/my_vhost',
                                     credentials))

channel = connection.channel()
channel.queue_declare(queue='Hello_World')

channel.basic_publish(exchange='',
                      routing_key='Hello_World',
                      body='Hello RabbitMQ World!')

print(" [x] Sent 'Hello_World'")

connection.close()

[cent@dlp ~]$

python3 send_msg.py

 [x] Sent 'Hello_World'

[3]	This is an example of receiving message on Python.

[cent@node01 ~]$

vi receive_msg.py

import signal
import pika

signal.signal(signal.SIGPIPE, signal.SIG_DFL)
signal.signal(signal.SIGINT, signal.SIG_DFL)

credentials = pika.PlainCredentials('serverworld', 'password')
connection = pika.BlockingConnection(pika.ConnectionParameters(
                                     '10.0.0.30',
                                     5672,
                                     '/my_vhost',
                                     credentials))

channel = connection.channel()
channel.queue_declare(queue='Hello_World')

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

channel.basic_consume('Hello_World', callback, auto_ack=True)

print(' [*] Waiting for messages. To exit press CTRL+C')
channel.start_consuming()

[cent@node01 ~]$

python3 receive_msg.py

 [*] Waiting for messages. To exit press CTRL+C
 [x] Received b'Hello RabbitMQ World!'

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