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#!/usr/bin/env python
"""
declare_queues.py
Creates and binds a queue on an AMQP direct exchange.
All messages using the routing key "routing_key" are
sent to the queue named "message_queue".
"""
import qpid
import sys
import os
from qpid.util import connect
from qpid.connection import Connection
from qpid.datatypes import Message, RangedSet, uuid4
from qpid.queue import Empty
#----- Initialization -----------------------------------
# Set parameters for login
host="127.0.0.1"
port=5672
user="guest"
password="guest"
# If an alternate host or port has been specified, use that instead
# (this is used in our unit tests)
if len(sys.argv) > 1 :
host=sys.argv[1]
if len(sys.argv) > 2 :
port=int(sys.argv[2])
# Create a connection.
socket = connect(host, port)
connection = Connection (sock=socket)
connection.start()
session = connection.session(str(uuid4()))
#----- Create a queue -------------------------------------
# queue_declare() creates an AMQP queue, which is held
# on the broker. Published messages are sent to the AMQP queue,
# from which messages are delivered to consumers.
#
# queue_bind() determines which messages are routed to a queue.
# Route all messages with the routing key "routing_key" to
# the AMQP queue named "message_queue".
session.exchange_declare(exchange="xml", type="xml")
session.queue_declare(queue="message_queue")
binding = {}
binding["xquery"] = """
let $w := ./weather
return $w/station = 'Raleigh-Durham International Airport (KRDU)'
and $w/temperature_f > 50
and $w/temperature_f - $w/dewpoint > 5
and $w/wind_speed_mph > 7
and $w/wind_speed_mph < 20 """
session.exchange_bind(exchange="xml", queue="message_queue", binding_key="weather", arguments=binding)
#----- Cleanup ---------------------------------------------
session.close()
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