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"""
Example of simple consumer that waits for a single message, acknowledges it
and exits.
"""
from __future__ import with_statement
from kombu import Connection, Exchange, Queue
from pprint import pformat
#: 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")
def pretty(obj):
return pformat(obj, indent=4)
#: This is the callback applied when a message is received.
def handle_message(body, message):
print("Received message: %r" % (body, ))
print(" properties:\n%s" % (pretty(message.properties), ))
print(" delivery_info:\n%s" % (pretty(message.delivery_info), ))
message.ack()
with Connection("amqp://guest:guest@localhost:5672//") as connection:
#: Create consumer using our callback and queue.
#: Second argument can also be a list to consume from
#: any number of queues.
with connection.Consumer(queue, callbacks=[handle_message]):
#: This waits for a single event. Note that this event may not
#: be a message, or a message that is to be delivered to the consumers
#: channel, but any event received on the connection.
connection.drain_events(timeout=10)
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