[rabbitmq-discuss] losing messages
Grenier,Michel [CMC]
Michel.Grenier at ssc-spc.gc.ca
Thu Sep 5 20:04:35 BST 2013
Perhaps there is something wrong with my consumer...
Here is the python code :
# MG
import amqplib.client_0_8 as amqp
import os,sys,time
machine = sys.argv[1]
user = "anonymous"
passwd = "anonymous"
exchange_realm = "/data"
exchange_name = "cmc"
exchange_type = "topic"
# being notified for all URLs
exchange_key = "exp.dd.notify.#"
#exchange_key = "exp.dd.notify.radar.PRECIP.GIF.WBI"
# being notified for a reception in
http://weather.gc.ca/radar/CAPPI/GIF/XAM
#exchange_key = "exp.dd.notify.radar.CAPPI.GIF.XAM"
# connection
connection = amqp.Connection(
machine,userid=user,password=passwd,ssl=False)
channel = connection.channel()
# exchange
channel.access_request(exchange_realm, active=True, read=True)
channel.exchange_declare(exchange_name, exchange_type, auto_delete=True)
# queue
_queuename, message_count, consumer_count = channel.queue_declare()
channel.queue_bind(_queuename, exchange_name, exchange_key)
# amqp callback
def amqp_callback(msg):
hdr = msg.properties['application_headers']
filename = hdr['filename']
msg.channel.basic_ack(msg.delivery_tag)
# Cancel this callback
if msg.body == 'quit':
msg.channel.basic_cancel(msg.consumer_tag)
self.msg = None
self.logger.error('CRITICAL ERROR...')
self.logger.error('Requiered to quit the connection')
sys.exit(1)
# send url to user callback
user_callback(msg.body)
###################################
# user callback
###################################
def user_callback(url):
t = time.strftime("%Y%m%d %H:%M:%S",time.gmtime())
print("%s %s" % (t,url))
# amqp callback activation
channel.basic_consume(_queuename, callback=amqp_callback)
# Wait for things to arrive on the queue
while True:
try:
channel.wait()
except:
channel.close()
connection.close()
sys.exit(1)
# close connections
channel.close()
connection.close()
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