If I run the following code, the callback (test) passed to the consumer is never triggered.
However, if I keep an eye on the rabbitmq GUI, I do see that the message is retrieved (but not acknowledged). So it seems the consumer is getting the message, but not passing it on to my callback. If I set no_ack to true, the message just disappears from the queue, again without calling the callback.
hn = "..."
usr = "..."
pwd = "..."
vh = "/"
port = 5672
rkey = "some.routing.key"
qname = "some-queue-name"
exchangeName = "MyExchange"
connection = BrokerConnection(hostname=hn,
userid=usr,
password=pwd,
virtual_host=vh,
port=port)
connection.connect()
ch = connection.channel()
# Create & the exchange
exchange = Exchange(name=exchangeName,
type="topic",
channel=ch,
durable=True)
exchange.declare()
# Temporary channel
ch = connection.channel()
# Create the queue to feed from
balq = Queue(name=qname,
exchange=exchange,
durable=True,
auto_delete=False,
channel=ch,
routing_key=rkey)
# Declare it on the server
balq.declare();
def test(b,m):
print '** Message Arrived **'
# Create a consumer
consumer = Consumer(channel=connection.channel(),
queues=balq,
auto_declare=False,
callbacks = [test]
)
# register it on the server
consumer.consume(no_ack=False);
print 'Waiting for messages'
while(True):
pass
However, the following code does work properly (I can successfully get and acknowledge the message):
m = balq.get(no_ack=False)
m.ack()
print m
But the whole point was to stay asynchronous. So something must be wrong with my callback..
Turns out its a simple error. Adding
connection.drain_events()
to the while loop causes messages to arrive.