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Wrapper around the aiormq for asyncio and humans

Project description

aio-pika

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A wrapper around aiormq for asyncio and humans.

Check out the examples and the tutorial in the documentation.

If you are a newcomer to RabbitMQ, please start with the adopted official RabbitMQ tutorial.

Features

  • Completely asynchronous API.

  • Object oriented API.

  • Transparent auto-reconnects with complete state recovery with connect_robust (e.g. declared queues or exchanges, consuming state and bindings).

  • Python 3.7+ compatible.

  • For python 3.5 users available aio-pika<7

  • Transparent publisher confirms support

  • Transactions support

  • Completely type-hints coverage.

Installation

pip install aio-pika

Usage example

Simple consumer:

import asyncio
import aio_pika
import aio_pika.abc


async def main(loop):
    # Connect with the givien parameters is also valiable.
    # aio_pika.connect_robust(host="host", login="login", password="password")
    # You can only choose one option to create a connection, url or kw-based params.
    connection = await aio_pika.connect_robust(
        "amqp://guest:guest@127.0.0.1/", loop=loop
    )

    async with connection:
        queue_name = "test_queue"

        # Creating channel
        channel: aio_pika.abc.AbstractChannel = await connection.channel()

        # Declaring queue
        queue: aio_pika.abc.AbstractQueue = await channel.declare_queue(
            queue_name,
            auto_delete=True
        )

        async with queue.iterator() as queue_iter:
            # Cancel consuming after __aexit__
            async for message in queue_iter:
                async with message.process():
                    print(message.body)

                    if queue.name in message.body.decode():
                        break


if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main(loop))
    loop.close()

Simple publisher:

import asyncio
import aio_pika
import aio_pika.abc


async def main(loop):
    # Explicit type annotation
    connection: aio_pika.RobustConnection = await aio_pika.connect_robust(
        "amqp://guest:guest@127.0.0.1/", loop=loop
    )

    routing_key = "test_queue"

    channel: aio_pika.abc.AbstractChannel = await connection.channel()

    await channel.default_exchange.publish(
        aio_pika.Message(
            body='Hello {}'.format(routing_key).encode()
        ),
        routing_key=routing_key
    )

    await connection.close()


if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main(loop))
    loop.close()

Get single message example:

import asyncio
from aio_pika import connect_robust, Message


async def main(loop):
    connection = await connect_robust(
        "amqp://guest:guest@127.0.0.1/",
        loop=loop
    )

    queue_name = "test_queue"
    routing_key = "test_queue"

    # Creating channel
    channel = await connection.channel()

    # Declaring exchange
    exchange = await channel.declare_exchange('direct', auto_delete=True)

    # Declaring queue
    queue = await channel.declare_queue(queue_name, auto_delete=True)

    # Binding queue
    await queue.bind(exchange, routing_key)

    await exchange.publish(
        Message(
            bytes('Hello', 'utf-8'),
            content_type='text/plain',
            headers={'foo': 'bar'}
        ),
        routing_key
    )

    # Receiving message
    incoming_message = await queue.get(timeout=5)

    # Confirm message
    await incoming_message.ack()

    await queue.unbind(exchange, routing_key)
    await queue.delete()
    await connection.close()


if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main(loop))

There are more examples and the RabbitMQ tutorial in the documentation.

Versioning

This software follows Semantic Versioning

For contributors

Setting up development environment

Clone the project:

git clone https://github.com/mosquito/aio-pika.git
cd aio-pika

Create a new virtualenv for aio-pika:

python3 -m venv env
source env/bin/activate

Install all requirements for aio-pika:

pip install -e '.[develop]'

Running Tests

NOTE: In order to run the tests locally you need to run a RabbitMQ instance with default user/password (guest/guest) and port (5672).

  • ProTip: Use Docker for this:

docker run -d -p 5671:5671 -p 5672:5672 -p 15671:15671 -p 15672:15672 mosquito/aiormq-rabbitmq

To test just run:

make test

Editing Documentation

To iterate quickly on the documentation live in your browser, try:

nox -s docs -- serve

Creating Pull Requests

Please feel free to create pull requests, but you should describe your use cases and add some examples.

Changes should follow a few simple rules:

  • When your changes break the public API, you must increase the major version.

  • When your changes are safe for public API (e.g. added an argument with default value)

  • You have to add test cases (see tests/ folder)

  • You must add docstrings

  • Feel free to add yourself to “thank’s to” section

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