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Metadata-Version: 1.1
Name: kombu
Version: 1.4.3
Summary: AMQP Messaging Framework for Python
Home-page: http://github.com/ask/kombu/
Author: Ask Solem
Author-email: ask@celeryproject.org
License: UNKNOWN
Description: #############################################
         kombu - AMQP Messaging Framework for Python
        #############################################
        
        :Version: 1.4.3
        
        Synopsis
        ========
        
        `Kombu` is an `AMQP`_ messaging framework for Python.
        
        AMQP is the Advanced Message Queuing Protocol, an open standard protocol
        for message orientation, queuing, routing, reliability and security.
        
        One of the most popular implementations of AMQP is `RabbitMQ`_.
        
        The aim of `Kombu` is to make messaging in Python as easy as possible by
        providing an idiomatic high-level interface for the AMQP protocol, and also
        provide proven and tested solutions to common messaging problems.
        
        Features
        ========
        
        * Allows application authors to support several message server
          solutions by using pluggable transports.
        
            * AMQP transports for both the `amqplib`_ (sync) and
              `pika`_ (sync + async) clients.
        
            * Virtual transports makes it really easy to add support for non-AMQP
              transports.  There is already built-in support for `Redis`_,
              `Beanstalk`_, `Amazon SQS`_, `CouchDB`_, and `MongoDB`_.
        
            * SQLAlchemy and Django ORM transports exists as plug-ins (
              `kombu-sqlalchemy`_ and `django-kombu`_).
        
            * 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 errrors.
        
        * 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`: http://www.rabbitmq.com/
        .. _`AMQP`: http://amqp.org
        .. _`Redis`: http://code.google.com/p/redis/
        .. _`Amazon SQS`: http://aws.amazon.com/sqs/
        .. _`MongoDB`: http://www.mongodb.org/
        .. _`CouchDB`: http://couchdb.apache.org/
        .. _`Beanstalk`: http://kr.github.com/beanstalkd/
        .. _`Rabbits and warrens`: http://blogs.digitar.com/jjww/2009/01/rabbits-and-warrens/
        .. _`amqplib`: http://barryp.org/software/py-amqplib/
        .. _`pika`: http://github.com/pika/pika
        .. _`Wikipedia article about AMQP`: http://en.wikipedia.org/wiki/AMQP
        .. _`kombu-sqlalchemy`: http://github.com/ask/kombu-sqlalchemy/
        .. _`django-kombu`: http://github.com/ask/django-kombu/
        .. _`carrot`: http://pypi.python.org/pypi/carrot/
        
        
        Transport Comparison
        ====================
        
        +---------------+----------+------------+-----------+---------------+
        | **Client**    | **Type** | **Direct** | **Topic** | **Fanout**    |
        +---------------+----------+------------+-----------+---------------+
        | *amqplib*     | Native   | Yes        | Yes       | Yes           |
        +---------------+----------+------------+-----------+---------------+
        | *pika*        | Native   | Yes        | Yes       | Yes           |
        +---------------+----------+------------+-----------+---------------+
        | *redis*       | Virtual  | Yes        | Yes[*]_   | Yes (PUB/SUB) |
        +---------------+----------+------------+-----------+---------------+
        | *beanstalk*   | Virtual  | Yes        | Yes[*]_   | No            |
        +---------------+----------+------------+-----------+---------------+
        | *SQS*         | Virtual  | Yes        | Yes[*]_   | Yes[#]_       |
        +---------------+----------+------------+-----------+---------------+
        | *mongodb*     | Virtual  | Yes        | Yes[*]_   | No            |
        +---------------+----------+------------+-----------+---------------+
        | *couchdb*     | Virtual  | Yes        | Yes[*]_   | No            |
        +---------------+----------+------------+-----------+---------------+
        | *in-memory*   | Virtual  | Yes        | Yes[*]_   | No            |
        +---------------+----------+------------+-----------+---------------+
        
        
        .. [*] Declarations only kept in memory, so exchanges/queues
               must be declared by all clients that needs them.
        
        .. [#] Fanout supported via storing routing tables in SimpleDB.
               Can be disabled by setting the ``supports_fanout`` transport option.
        
        
        Documentation
        -------------
        
        Kombu is using Sphinx, and the latest documentation is available at GitHub:
        
            http://ask.github.com/kombu
        
        Quick overview
        --------------
        
        ::
        
            from kombu import BrokerConnection, 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 BrokerConnection("amqp://guest:guest@localhost//") as conn:
        
                # produce
                with conn.Producer(exchange=media_exchange,
                                   serializer="json", routing_key="video") as producer:
                    producer.publish({"name": "/tmp/lolcat1.avi", "size": 1301013})
        
                # 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 menually::
        
            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::
        
            from kombu import BrokerConnection, Consumer, Producer
        
            connection = BrokerConnection()
                # ...
            connection.close()
        
            consumer = Consumer(channel_or_connection, ...)
            consumer.register_callback(my_callback)
            consumer.consume()
                # ....
            consumer.cancel()
        
        
            producer = Producer(channel_or_connection, ...)
                # ....
            producer.close()
        
        
        `Exchange` and `Queue` are simply declarations that can be pickled
        and used in configuaration files etc.
        
        They also support operations, but to do so they need to be bound
        to a channel:
        
        ::
        
            >>> exchange = Exchange("tasks", "direct")
        
            >>> connection = BrokerConnection()
            >>> channel = connection.channel()
            >>> bound_exchange = exchange(channel)
            >>> 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.
        
        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
        
        
        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"`.
        
        Getting Help
        ============
        
        Mailing list
        ------------
        
        Join the `carrot-users`_ mailing list.
        
        .. _`carrot-users`: http://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 http://github.com/ask/kombu/issues/
        
        Contributing
        ============
        
        Development of `Kombu` happens at Github: http://github.com/ask/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.
        
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 :: 2.7
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.5
Classifier: Programming Language :: Python :: 2.4
Classifier: Programming Language :: Python :: 2
Classifier: Intended Audience :: Developers
Classifier: Topic :: Communications
Classifier: Topic :: System :: Distributed Computing
Classifier: Topic :: System :: Networking
Classifier: Topic :: Software Development :: Libraries :: Python Modules