"""

Example producer that sends a single message and exits.

You can use `complete_receive.py` to receive the message sent.

"""
from __future__ import with_statement

from kombu import Connection, Exchange, Queue

#: By default messages sent to exchanges are persistent (delivery_mode=2),
#: and queues and exchanges are durable.
exchange = Exchange("kombu_demo", type="direct")
queue = Queue("kombu_demo", exchange, routing_key="kombu_demo")


with Connection("amqp://guest:guest@localhost:5672//") as connection:

    #: Producers are used to publish messages.
    #: a default exchange and routing key can also be specifed
    #: as arguments the Producer, but we rather specify this explicitly
    #: at the publish call.
    producer = connection.Producer()

    #: Publish the message using the json serializer (which is the default),
    #: and zlib compression.  The kombu consumer will automatically detect
    #: encoding, serializiation and compression used and decode accordingly.
    producer.publish({"hello": "world"},
                     exchange=exchange,
                     routing_key="kombu_demo",
                     serializer="json", compression="zlib")