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https://github.com/celery/py-amqp

amqplib fork
https://github.com/celery/py-amqp

amqp amqp-client amqp-connection amqp-messages python python-library python3 rabbitmq

Last synced: 3 months ago
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amqplib fork

Host: GitHub
URL: https://github.com/celery/py-amqp
Owner: celery
License: other
Created: 2012-07-23T13:50:57.000Z (over 12 years ago)
Default Branch: main
Last Pushed: 2024-04-08T19:53:12.000Z (7 months ago)
Last Synced: 2024-05-19T17:32:58.164Z (6 months ago)
Topics: amqp, amqp-client, amqp-connection, amqp-messages, python, python-library, python3, rabbitmq
Language: Python
Homepage:
Size: 2.35 MB
Stars: 309
Watchers: 22
Forks: 198
Open Issues: 38
Metadata Files:
- Readme: README.rst
- Changelog: Changelog
- License: LICENSE
- Authors: AUTHORS

Awesome Lists containing this project

README

        =====================================================================

 Python AMQP 0.9.1 client library

=====================================================================

|build-status| |coverage| |license| |wheel| |pyversion| |pyimp|

:Version: 5.2.0

:Web: https://amqp.readthedocs.io/

:Download: https://pypi.org/project/amqp/

:Source: http://github.com/celery/py-amqp/

:Keywords: amqp, rabbitmq

About

=====

This is a fork of amqplib_ which was originally written by Barry Pederson.

It is maintained by the Celery_ project, and used by `kombu`_ as a pure python

alternative when `librabbitmq`_ is not available.

This library should be API compatible with `librabbitmq`_.

.. _amqplib: https://pypi.org/project/amqplib/

.. _Celery: http://celeryproject.org/

.. _kombu: https://kombu.readthedocs.io/

.. _librabbitmq: https://pypi.org/project/librabbitmq/

Differences from `amqplib`_

===========================

- Supports draining events from multiple channels (``Connection.drain_events``)

- Support for timeouts

- Channels are restored after channel error, instead of having to close the

  connection.

- Support for heartbeats

    - ``Connection.heartbeat_tick(rate=2)`` must called at regular intervals

      (half of the heartbeat value if rate is 2).

    - Or some other scheme by using ``Connection.send_heartbeat``.

- Supports RabbitMQ extensions:

    - Consumer Cancel Notifications

        - by default a cancel results in ``ChannelError`` being raised

        - but not if a ``on_cancel`` callback is passed to ``basic_consume``.

    - Publisher confirms

        - ``Channel.confirm_select()`` enables publisher confirms.

        - ``Channel.events['basic_ack'].append(my_callback)`` adds a callback

          to be called when a message is confirmed. This callback is then

          called with the signature ``(delivery_tag, multiple)``.

    - Exchange-to-exchange bindings: ``exchange_bind`` / ``exchange_unbind``.

        - ``Channel.confirm_select()`` enables publisher confirms.

        - ``Channel.events['basic_ack'].append(my_callback)`` adds a callback

          to be called when a message is confirmed. This callback is then

          called with the signature ``(delivery_tag, multiple)``.

    - Authentication Failure Notifications

        Instead of just closing the connection abruptly on invalid

        credentials, py-amqp will raise an ``AccessRefused`` error

        when connected to rabbitmq-server 3.2.0 or greater.

- Support for ``basic_return``

- Uses AMQP 0-9-1 instead of 0-8.

    - ``Channel.access_request`` and ``ticket`` arguments to methods

      **removed**.

    - Supports the ``arguments`` argument to ``basic_consume``.

    - ``internal`` argument to ``exchange_declare`` removed.

    - ``auto_delete`` argument to ``exchange_declare`` deprecated

    - ``insist`` argument to ``Connection`` removed.

    - ``Channel.alerts`` has been removed.

    - Support for ``Channel.basic_recover_async``.

    - ``Channel.basic_recover`` deprecated.

- Exceptions renamed to have idiomatic names:

    - ``AMQPException`` -> ``AMQPError``

    - ``AMQPConnectionException`` -> ConnectionError``

    - ``AMQPChannelException`` -> ChannelError``

    - ``Connection.known_hosts`` removed.

    - ``Connection`` no longer supports redirects.

    - ``exchange`` argument to ``queue_bind`` can now be empty

      to use the "default exchange".

- Adds ``Connection.is_alive`` that tries to detect

  whether the connection can still be used.

- Adds ``Connection.connection_errors`` and ``.channel_errors``,

  a list of recoverable errors.

- Exposes the underlying socket as ``Connection.sock``.

- Adds ``Channel.no_ack_consumers`` to keep track of consumer tags

  that set the no_ack flag.

- Slightly better at error recovery

Quick overview

==============

Simple producer publishing messages to ``test`` queue using default exchange:

.. code:: python

    import amqp

    with amqp.Connection('broker.example.com') as c:

        ch = c.channel()

        ch.basic_publish(amqp.Message('Hello World'), routing_key='test')

Producer publishing to ``test_exchange`` exchange with publisher confirms enabled and using virtual_host ``test_vhost``:

.. code:: python

    import amqp

    with amqp.Connection(

        'broker.example.com', exchange='test_exchange',

        confirm_publish=True, virtual_host='test_vhost'

    ) as c:

        ch = c.channel()

        ch.basic_publish(amqp.Message('Hello World'), routing_key='test')

Consumer with acknowledgments enabled:

.. code:: python

    import amqp

    with amqp.Connection('broker.example.com') as c:

        ch = c.channel()

        def on_message(message):

            print('Received message (delivery tag: {}): {}'.format(message.delivery_tag, message.body))

            ch.basic_ack(message.delivery_tag)

        ch.basic_consume(queue='test', callback=on_message)

        while True:

            c.drain_events()

Consumer with acknowledgments disabled:

.. code:: python

    import amqp

    with amqp.Connection('broker.example.com') as c:

        ch = c.channel()

        def on_message(message):

            print('Received message (delivery tag: {}): {}'.format(message.delivery_tag, message.body))

        ch.basic_consume(queue='test', callback=on_message, no_ack=True)

        while True:

            c.drain_events()

Speedups

========

This library has **experimental** support of speedups. Speedups are implemented using Cython. To enable speedups, ``CELERY_ENABLE_SPEEDUPS`` environment variable must be set during building/installation.

Currently speedups can be installed:

1. using source package (using ``--no-binary`` switch):

.. code:: shell

    CELERY_ENABLE_SPEEDUPS=true pip install --no-binary :all: amqp

2. building directly source code:

.. code:: shell

    CELERY_ENABLE_SPEEDUPS=true python setup.py install

Further

=======

- Differences between AMQP 0.8 and 0.9.1

    http://www.rabbitmq.com/amqp-0-8-to-0-9-1.html

- AMQP 0.9.1 Quick Reference

    http://www.rabbitmq.com/amqp-0-9-1-quickref.html

- RabbitMQ Extensions

    http://www.rabbitmq.com/extensions.html

- For more information about AMQP, visit

    http://www.amqp.org

- For other Python client libraries see:

    http://www.rabbitmq.com/devtools.html#python-dev

.. |build-status| image:: https://github.com/celery/py-amqp/actions/workflows/ci.yaml/badge.svg

    :alt: Build status

    :target: https://github.com/celery/py-amqp/actions/workflows/ci.yaml

.. |coverage| image:: https://codecov.io/github/celery/py-amqp/coverage.svg?branch=main

    :target: https://codecov.io/github/celery/py-amqp?branch=main

.. |license| image:: https://img.shields.io/pypi/l/amqp.svg

    :alt: BSD License

    :target: https://opensource.org/licenses/BSD-3-Clause

.. |wheel| image:: https://img.shields.io/pypi/wheel/amqp.svg

    :alt: Python AMQP can be installed via wheel

    :target: https://pypi.org/project/amqp/

.. |pyversion| image:: https://img.shields.io/pypi/pyversions/amqp.svg

    :alt: Supported Python versions.

    :target: https://pypi.org/project/amqp/

.. |pyimp| image:: https://img.shields.io/pypi/implementation/amqp.svg

    :alt: Support Python implementations.

    :target: https://pypi.org/project/amqp/

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============================================

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