| #!/usr/bin/env python |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| """ |
| xml_producer.py |
| |
| Publishes messages to an XML exchange, using |
| the routing key "weather" |
| """ |
| |
| |
| 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 |
| |
| #----- Functions ---------------------------------------- |
| |
| # Data for weather reports |
| |
| station = ("Raleigh-Durham International Airport (KRDU)", |
| "New Bern, Craven County Regional Airport (KEWN)", |
| "Boone, Watauga County Hospital Heliport (KTNB)", |
| "Hatteras, Mitchell Field (KHSE)") |
| wind_speed_mph = ( 0, 2, 5, 10, 16, 22, 28, 35, 42, 51, 61, 70, 80 ) |
| temperature_f = ( 30, 40, 50, 60, 70, 80, 90, 100 ) |
| dewpoint = ( 35, 40, 45, 50 ) |
| |
| def pick_one(list, i): |
| return str( list [ i % len(list)] ) |
| |
| def report(i): |
| return "<weather>" + "<station>" + pick_one(station,i)+ "</station>" + "<wind_speed_mph>" + pick_one(wind_speed_mph,i) + "</wind_speed_mph>" + "<temperature_f>" + pick_one(temperature_f,i) + "</temperature_f>" + "<dewpoint>" + pick_one(dewpoint,i) + "</dewpoint>" + "</weather>" |
| |
| |
| #----- 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, username=user, password=password) |
| connection.start() |
| session = connection.session(str(uuid4())) |
| |
| #----- Publish some messages ------------------------------ |
| |
| # Create some messages and put them on the broker. |
| |
| props = session.delivery_properties(routing_key="weather") |
| |
| for i in range(10): |
| print report(i) |
| session.message_transfer(destination="xml", message=Message(props, report(i))) |
| |
| |
| #----- Cleanup -------------------------------------------- |
| |
| # Clean up before exiting so there are no open threads. |
| |
| session.close() |