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#!/usr/bin/env python
"""
listener.py
This AMQP client reads messages from a message
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
#
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)
connection.start()
session = connection.session(str(uuid4()))
#----- Read from queue --------------------------------------------
# Create a server-side queue and route messages to it.
# The server-side queue must have a unique name. Use the
# session id for that.
server_queue_name = session.name
session.queue_declare(queue=server_queue_name)
session.exchange_bind(queue=server_queue_name, exchange="amq.fanout")
# Create a local queue to receive messages from the server-side
# queue.
local_queue_name = "local_queue"
local_queue = session.incoming(local_queue_name)
# The local queue name identifies the client-side queue.
local_queue_name = "local_queue"
local_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 local_queue.start() is called.
session.message_subscribe(queue=server_queue_name, destination=local_queue_name)
local_queue.start()
receiver = Receiver ()
local_queue.listen (receiver.Handler)
while not receiver.isFinal ():
sleep (1)
#----- Cleanup ------------------------------------------------
# Clean up before exiting so there are no open threads.
#
session.close()
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