mirror of https://github.com/celery/kombu.git
46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
"""
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Example of simple consumer that waits for a single message, acknowledges it
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and exits.
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"""
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from kombu import BrokerConnection, Exchange, Queue, Consumer
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from pprint import pformat
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#: By default messages sent to exchanges are persistent (delivery_mode=2),
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#: and queues and exchanges are durable.
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exchange = Exchange("kombu_demo", type="direct")
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queue = Queue("kombu_demo", exchange, routing_key="kombu_demo")
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def pretty(obj):
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return pformat(obj, indent=4)
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#: This is the callback applied when a message is received.
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def handle_message(body, message):
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print("Received message: %r" % (body, ))
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print(" properties:\n%s" % (pretty(message.properties), ))
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print(" delivery_info:\n%s" % (pretty(message.delivery_info), ))
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message.ack()
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#: Create a connection and a channel.
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#: If hostname, userid, password and virtual_host is not specified
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#: the values below are the default, but listed here so it can
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#: be easily changed.
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connection = BrokerConnection(hostname="localhost",
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userid="guest",
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password="guest",
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virtual_host="/")
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channel = connection.channel()
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#: Create consumer using our callback and queue.
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#: Second argument can also be a list to consume from
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#: any number of queues.
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consumer = Consumer(channel, queue, callbacks=[handle_message])
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consumer.consume()
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#: This waits for a single event. Note that this event may not
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#: be a message, or a message that is to be delivered to the consumers
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#: channel, but any event received on the connection.
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connection.drain_events()
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