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Metadata-Version: 1.1
Name: kombu
Version: 4.1.0
Summary: Messaging library for Python.
Home-page: https://kombu.readthedocs.io
Author: Ask Solem
Author-email: ask@celeryproject.org
License: BSD
Description-Content-Type: UNKNOWN
Description: ========================================
         kombu - Messaging library for Python
        ========================================
        
        |build-status| |coverage| |license| |wheel| |pyversion| |pyimp|
        
        :Version: 4.1.0
        :Web: http://kombu.me/
        :Download: http://pypi.python.org/pypi/kombu/
        :Source: https://github.com/celery/kombu/
        :Keywords: messaging, amqp, rabbitmq, redis, mongodb, python, queue
        
        About
        =====
        
        `Kombu` is a messaging library for Python.
        
        The aim of `Kombu` is to make messaging in Python as easy as possible by
        providing an idiomatic high-level interface for the AMQ protocol, and also
        provide proven and tested solutions to common messaging problems.
        
        `AMQP`_ is the Advanced Message Queuing Protocol, an open standard protocol
        for message orientation, queuing, routing, reliability and security,
        for which the `RabbitMQ`_ messaging server is the most popular implementation.
        
        Features
        ========
        
        * Allows application authors to support several message server
          solutions by using pluggable transports.
        
            * AMQP transport using the `py-amqp`_, `librabbitmq`_, or `qpid-python`_ libraries.
        
            * High performance AMQP transport written in C - when using `librabbitmq`_
        
              This is automatically enabled if librabbitmq is installed:
        
              ::
        
                $ pip install librabbitmq
        
            * Virtual transports makes it really easy to add support for non-AMQP
              transports. There is already built-in support for `Redis`_,
              `Amazon SQS`_, `ZooKeeper`_, `SoftLayer MQ`_ and `Pyro`_.
        
            * In-memory transport for unit testing.
        
        * Supports automatic encoding, serialization and compression of message
          payloads.
        
        * Consistent exception handling across transports.
        
        * The ability to ensure that an operation is performed by gracefully
          handling connection and channel errors.
        
        * Several annoyances with `amqplib`_ has been fixed, like supporting
          timeouts and the ability to wait for events on more than one channel.
        
        * Projects already using `carrot`_ can easily be ported by using
          a compatibility layer.
        
        For an introduction to AMQP you should read the article `Rabbits and warrens`_,
        and the `Wikipedia article about AMQP`_.
        
        .. _`RabbitMQ`: https://www.rabbitmq.com/
        .. _`AMQP`: https://amqp.org
        .. _`py-amqp`: https://pypi.python.org/pypi/amqp/
        .. _`qpid-python`: https://pypi.python.org/pypi/qpid-python/
        .. _`Redis`: https://redis.io
        .. _`Amazon SQS`: https://aws.amazon.com/sqs/
        .. _`Zookeeper`: https://zookeeper.apache.org/
        .. _`Rabbits and warrens`: http://blogs.digitar.com/jjww/2009/01/rabbits-and-warrens/
        .. _`amqplib`: https://barryp.org/software/py-amqplib/
        .. _`Wikipedia article about AMQP`: https://en.wikipedia.org/wiki/AMQP
        .. _`carrot`: https://pypi.python.org/pypi/carrot/
        .. _`librabbitmq`: https://pypi.python.org/pypi/librabbitmq
        .. _`Pyro`: https://pythonhosting.org/Pyro4
        .. _`SoftLayer MQ`: https://sldn.softlayer.com/reference/messagequeueapi
        
        .. _transport-comparison:
        
        Transport Comparison
        ====================
        
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | **Client**    | **Type** | **Direct** | **Topic**  | **Fanout**    | **Priority** | **TTL**               |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | *amqp*        | Native   | Yes        | Yes        | Yes           | Yes [#f3]_   | Yes [#f4]_            |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | *qpid*        | Native   | Yes        | Yes        | Yes           | No           | No                    |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | *redis*       | Virtual  | Yes        | Yes        | Yes (PUB/SUB) | Yes          | No                    |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | *mongodb*     | Virtual  | Yes        | Yes        | Yes           | Yes          | Yes                   |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | *SQS*         | Virtual  | Yes        | Yes [#f1]_ | Yes [#f2]_    | No           | No                    |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | *zookeeper*   | Virtual  | Yes        | Yes [#f1]_ | No            | Yes          | No                    |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | *in-memory*   | Virtual  | Yes        | Yes [#f1]_ | No            | No           | No                    |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        | *SLMQ*        | Virtual  | Yes        | Yes [#f1]_ | No            | No           | No                    |
        +---------------+----------+------------+------------+---------------+--------------+-----------------------+
        
        
        .. [#f1] Declarations only kept in memory, so exchanges/queues
                 must be declared by all clients that needs them.
        
        .. [#f2] Fanout supported via storing routing tables in SimpleDB.
                 Disabled by default, but can be enabled by using the
                 ``supports_fanout`` transport option.
        
        .. [#f3] AMQP Message priority support depends on broker implementation.
        
        .. [#f4] AMQP Message/Queue TTL support depends on broker implementation.
        
        Documentation
        -------------
        
        Kombu is using Sphinx, and the latest documentation can be found here:
        
            https://kombu.readthedocs.io/
        
        Quick overview
        --------------
        
        .. code:: python
        
            from kombu import Connection, Exchange, Queue
        
            media_exchange = Exchange('media', 'direct', durable=True)
            video_queue = Queue('video', exchange=media_exchange, routing_key='video')
        
            def process_media(body, message):
                print body
                message.ack()
        
            # connections
            with Connection('amqp://guest:guest@localhost//') as conn:
        
                # produce
                producer = conn.Producer(serializer='json')
                producer.publish({'name': '/tmp/lolcat1.avi', 'size': 1301013},
                                  exchange=media_exchange, routing_key='video',
                                  declare=[video_queue])
        
                # the declare above, makes sure the video queue is declared
                # so that the messages can be delivered.
                # It's a best practice in Kombu to have both publishers and
                # consumers declare the queue. You can also declare the
                # queue manually using:
                #     video_queue(conn).declare()
        
                # consume
                with conn.Consumer(video_queue, callbacks=[process_media]) as consumer:
                    # Process messages and handle events on all channels
                    while True:
                        conn.drain_events()
        
            # Consume from several queues on the same channel:
            video_queue = Queue('video', exchange=media_exchange, key='video')
            image_queue = Queue('image', exchange=media_exchange, key='image')
        
            with connection.Consumer([video_queue, image_queue],
                                     callbacks=[process_media]) as consumer:
                while True:
                    connection.drain_events()
        
        
        Or handle channels manually:
        
        .. code:: python
        
            with connection.channel() as channel:
                producer = Producer(channel, ...)
                consumer = Producer(channel)
        
        
        All objects can be used outside of with statements too,
        just remember to close the objects after use:
        
        .. code:: python
        
            from kombu import Connection, Consumer, Producer
        
            connection = Connection()
                # ...
            connection.release()
        
            consumer = Consumer(channel_or_connection, ...)
            consumer.register_callback(my_callback)
            consumer.consume()
                # ....
            consumer.cancel()
        
        
        `Exchange` and `Queue` are simply declarations that can be pickled
        and used in configuration files etc.
        
        They also support operations, but to do so they need to be bound
        to a channel.
        
        Binding exchanges and queues to a connection will make it use
        that connections default channel.
        
        ::
        
            >>> exchange = Exchange('tasks', 'direct')
        
            >>> connection = Connection()
            >>> bound_exchange = exchange(connection)
            >>> bound_exchange.delete()
        
            # the original exchange is not affected, and stays unbound.
            >>> exchange.delete()
            raise NotBoundError: Can't call delete on Exchange not bound to
                a channel.
        
        Terminology
        ===========
        
        There are some concepts you should be familiar with before starting:
        
            * Producers
        
                Producers sends messages to an exchange.
        
            * Exchanges
        
                Messages are sent to exchanges. Exchanges are named and can be
                configured to use one of several routing algorithms. The exchange
                routes the messages to consumers by matching the routing key in the
                message with the routing key the consumer provides when binding to
                the exchange.
        
            * Consumers
        
                Consumers declares a queue, binds it to a exchange and receives
                messages from it.
        
            * Queues
        
                Queues receive messages sent to exchanges. The queues are declared
                by consumers.
        
            * Routing keys
        
                Every message has a routing key. The interpretation of the routing
                key depends on the exchange type. There are four default exchange
                types defined by the AMQP standard, and vendors can define custom
                types (so see your vendors manual for details).
        
                These are the default exchange types defined by AMQP/0.8:
        
                    * Direct exchange
        
                        Matches if the routing key property of the message and
                        the `routing_key` attribute of the consumer are identical.
        
                    * Fan-out exchange
        
                        Always matches, even if the binding does not have a routing
                        key.
        
                    * Topic exchange
        
                        Matches the routing key property of the message by a primitive
                        pattern matching scheme. The message routing key then consists
                        of words separated by dots (`"."`, like domain names), and
                        two special characters are available; star (`"*"`) and hash
                        (`"#"`). The star matches any word, and the hash matches
                        zero or more words. For example `"*.stock.#"` matches the
                        routing keys `"usd.stock"` and `"eur.stock.db"` but not
                        `"stock.nasdaq"`.
        
        
        Installation
        ============
        
        You can install `Kombu` either via the Python Package Index (PyPI)
        or from source.
        
        To install using `pip`,:
        
        ::
        
            $ pip install kombu
        
        To install using `easy_install`,:
        
        ::
        
            $ easy_install kombu
        
        If you have downloaded a source tarball you can install it
        by doing the following,:
        
        ::
        
            $ python setup.py build
            # python setup.py install # as root
        
        
        
        Getting Help
        ============
        
        Mailing list
        ------------
        
        Join the `carrot-users`_ mailing list.
        
        .. _`carrot-users`: https://groups.google.com/group/carrot-users/
        
        Bug tracker
        ===========
        
        If you have any suggestions, bug reports or annoyances please report them
        to our issue tracker at https://github.com/celery/kombu/issues/
        
        Contributing
        ============
        
        Development of `Kombu` happens at Github: https://github.com/celery/kombu
        
        You are highly encouraged to participate in the development. If you don't
        like Github (for some reason) you're welcome to send regular patches.
        
        License
        =======
        
        This software is licensed under the `New BSD License`. See the `LICENSE`
        file in the top distribution directory for the full license text.
        
        
        .. |build-status| image:: https://secure.travis-ci.org/celery/kombu.png?branch=master
            :alt: Build status
            :target: https://travis-ci.org/celery/kombu
        
        .. |coverage| image:: https://codecov.io/github/celery/kombu/coverage.svg?branch=master
            :target: https://codecov.io/github/celery/kombu?branch=master
        
        .. |license| image:: https://img.shields.io/pypi/l/kombu.svg
            :alt: BSD License
            :target: https://opensource.org/licenses/BSD-3-Clause
        
        .. |wheel| image:: https://img.shields.io/pypi/wheel/kombu.svg
            :alt: Kombu can be installed via wheel
            :target: https://pypi.python.org/pypi/kombu/
        
        .. |pyversion| image:: https://img.shields.io/pypi/pyversions/kombu.svg
            :alt: Supported Python versions.
            :target: https://pypi.python.org/pypi/kombu/
        
        .. |pyimp| image:: https://img.shields.io/pypi/implementation/kombu.svg
            :alt: Support Python implementations.
            :target: https://pypi.python.org/pypi/kombu/
        --
        
        
Keywords: messaging message amqp rabbitmq redis actor producer consumer
Platform: any
Classifier: Development Status :: 5 - Production/Stable
Classifier: License :: OSI Approved :: BSD License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Programming Language :: Python :: Implementation :: Jython
Classifier: Intended Audience :: Developers
Classifier: Topic :: Communications
Classifier: Topic :: System :: Distributed Computing
Classifier: Topic :: System :: Networking
Classifier: Topic :: Software Development :: Libraries :: Python Modules