| #!/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. |
| # |
| """ |
| direct_consumer.py |
| |
| This AMQP client reads messages from a message |
| queue named "message_queue". |
| """ |
| |
| import qpid |
| import sys |
| import os |
| from random import randint |
| 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, username=user, password=password) |
| connection.start() |
| session = connection.session(str(uuid4())) |
| |
| |
| #----- Read from queue -------------------------------------------- |
| |
| # Now let's create a local client queue and tell it to read |
| # incoming messages. |
| |
| # The consumer tag identifies the client-side queue. |
| |
| local_queue_name = "local_queue" |
| local_queue = session.incoming(local_queue_name) |
| |
| # Call message_consume() to tell the broker to deliver messages |
| # from the AMQP queue to this local client queue. The broker will |
| # start delivering messages as soon as local_queue.start() is called. |
| |
| session.message_subscribe(queue="message_queue", destination=local_queue_name) |
| local_queue.start() |
| |
| # Initialize 'final' and 'content', variables used to identify the last message. |
| |
| message = None |
| while True: |
| try: |
| message = local_queue.get(timeout=10) |
| session.message_accept(RangedSet(message.id)) |
| content = message.body |
| print content |
| except Empty: |
| print "No more messages!" |
| break |
| |
| |
| #----- Cleanup ------------------------------------------------ |
| |
| # Clean up before exiting so there are no open threads. |
| # |
| |
| session.close() |