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Python interface for simple usage of AMQP middleware applications.

Project description

PyAMQP

Python interface for simple usage of AMQP middleware applications.

This interface is made to ease the process of using AMQP software.

The applications supported so far:

  • RabbitMQ: This is a popular open-source message-broker that implemented the Advanced Message Queuing Protocol (AMQP) written in the Erlang programming language

How to get it

pip install pyamqp

Dependencies

Pika: 0.13 or higher

pytest: 4.0.2 or higher

Usage example

RabbitMQ - Receiver

from pyamqp.rabbit.receiver import Receiver

# Initializing and creating the connection with the Rabbit server
receiver_instance = Receiver(host='18.222.222.222',
                             port=5672,
                             user='guest',
                             password='1245554221')

# Declares the queue with the specified parameters, 
# binds it to an exchange using the routing_keys list.
receiver_instance.connect_queue(queue_name='test',
                                exchange='test_exchange',
                                routing_keys=['A', 'B'],
                                is_durable=True,
                                auto_delete=False)
# callback function
# Not necesary if inheritance is used
def get_message(message, details):
    some_value = message.get('some_key', None)
    print(some_value)

receiver_instance.consume(callback_function=get_message,
                          no_ack=True,
                          consumer_tag='AAAAKKK_2232')

Rabbit-Dispatcher

from pyamqp.rabbit.dispatcher import Dispatcher

dispatcher_instance = Dispatcher(host='18.222.222.222',
                                 port=5672,
                                 user='guest',
                                 password='1245554221')

# Declaring exchanges that are going to be used for sending messages
# exchanges parameter can be an string or a list of strings                               
dispatcher_instance.connect_exchanges(exchanges=['test_exch', 'test_exch_2],
                                      exchange_type='topic',
                                      auto_delete=True)


# There can be only two types of passed messages, string or dicts.
message_1 = 'Hello'
message_2 = {'Ciao': 'Hola'} 

dispatcher.send_message(message_1, 'THIS.IS.A.KEY', 'test_exch')
dispatcher.send_message(message_2, 'KEY.SOMETHING', 'test_exch_2')

Current limitations

  • There's only support for BlockingConnection adapter since this is the main adapter used in production.
  • Threaded Receiver class is not thread-safe, will be added using an internal instance of Queue() to address that issue.
  • This packages does not support the inheritance of Receiver and Dispatcher in the same child class.

License

GNU GPLv3

Permissions of this strong copyleft license are conditioned on making available complete source code of licensed works and modifications, which include larger works using a licensed work, under the same license. Copyright and license notices must be preserved. Contributors provide an express grant of patent rights.

Project details


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