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#!/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.
#
"""
listener.py
This AMQP client reads messages from a message
queue named "message_queue". It is implemented
as a message listener.
"""
# Common includes
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
# Includes specific to this example
from time import sleep
#----- Message Receive Handler -----------------------------
class Receiver:
def __init__ (self):
self.finalReceived = False
def isFinal (self):
return self.finalReceived
def Handler (self, message):
content = message.body
session.message_accept(RangedSet(message.id))
print content
if content == "That's all, folks!":
self.finalReceived = True
#----- 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 local_queue_name identifies the client-side queue.
local_queue_name = "local_queue"
queue = session.incoming(local_queue_name)
# Call message_subscribe() 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 message_subscribe() is called.
session.message_subscribe(queue="message_queue", destination=local_queue_name)
queue.start()
receiver = Receiver()
queue.listen (receiver.Handler)
while not receiver.isFinal() :
sleep (1)
#----- Cleanup ------------------------------------------------
# Clean up before exiting so there are no open threads.
#
session.close(timeout=10)
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