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#!/usr/bin/env python
"""
server.py
Server for a client/server example
"""
import qpid
import sys
from qpid.client import Client
from qpid.content import Content
from qpid.queue import Empty
#----- Functions -------------------------------------------
def respond(session, request):
# The routing key for the response is the request's reply-to
# property. The body for the response is the request's body,
# converted to upper case.
response=Content(request.body.upper())
response["routing_key"] = request["reply_to"]["routing_key"]
session.message_transfer(destination=request["reply_to"]["exchange_name"], content=response)
#----- Initialization --------------------------------------
# Set parameters for login
host=len(sys.argv) > 1 and sys.argv[1] or "127.0.0.1"
port=len(sys.argv) > 2 and int(sys.argv[2]) or 5672
amqp_spec="/usr/share/amqp/amqp.0-10-preview.xml"
user="guest"
password="guest"
# Create a client and log in to it.
client = Client(host, port, qpid.spec.load(amqp_spec))
client.start({"LOGIN": user, "PASSWORD": password})
# Create a session and open it.
session = client.session()
session.session_open()
#----- Main Body -- ----------------------------------------
# Create a request queue and subscribe to it
session.queue_declare(queue="request", exclusive=True)
session.queue_bind(exchange="amq.direct", queue="request", routing_key="request")
dest = "request_destination"
session.message_subscribe(queue="request", destination=dest)
session.message_flow(dest, 0, 0xFFFFFFFF)
session.message_flow(dest, 1, 0xFFFFFFFF)
# Remind the user to start the client program
print "Request server running - run your client now."
print "(Times out after 100 seconds ...)"
sys.stdout.flush()
# Respond to each request
queue = client.queue(dest)
# If we get a message, send it back to the user (as indicated in the
# ReplyTo property)
while True:
try:
request = queue.get(timeout=100)
respond(session, request.content)
request.complete()
except Empty:
print "No more messages!"
break;
#----- Cleanup ------------------------------------------------
# Clean up before exiting so there are no open threads.
session.session_close()
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