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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.
#
import optparse, traceback
from qpid.messaging import *
from qpid.log import enable, DEBUG, WARN
from common import *
parser = optparse.OptionParser(usage="usage: %prog [options]",
description="machine inventory agent")
parser.add_option("-b", "--broker", default="localhost",
help="connect to specified BROKER (default %default)")
parser.add_option("-d", "--database",
help="database file for persistent machine status")
parser.add_option("-a", "--address", default="reservations",
help="address for reservation requests")
parser.add_option("-v", dest="verbose", action="store_true",
help="enable verbose logging")
opts, args = parser.parse_args()
if opts.verbose:
enable("qpid", DEBUG)
else:
enable("qpid", WARN)
conn = Connection.establish(opts.broker, reconnect=True, reconnect_interval=1)
class Inventory(Dispatcher):
def __init__(self):
self.agents = {}
def running(self):
return True
def do_status(self, msg):
id, status, owner = get_status(msg)
self.agents[id] = (status, owner)
def do_query(self, msg):
patterns = msg.content["identity"]
result = []
for id, (status, owner) in self.agents.items():
if match(id, patterns):
r = Message(properties = {
"type": "status"
},
content = {
"identity": id,
"status": status,
"owner": owner
})
result.append((msg.reply_to, r))
continue
if not result:
result.append((msg.reply_to,
Message(properties = {"type": "empty"})))
return result
def ignored(self, msg):
type = msg.properties.get("type")
return type not in ("status", "query")
try:
ssn = conn.session()
rcv = ssn.receiver(opts.address, capacity = 10)
snd = ssn.sender(opts.address)
snd.send(Message(reply_to = opts.address,
properties = {"type": "discover", "identity": ["*"]}))
inv = Inventory()
inv.run(ssn)
except KeyboardInterrupt:
pass
finally:
conn.close()
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