tbrecv.py.in 3.27 KB
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#! /usr/local/bin/python
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#
# Copyright (c) 2002-2004 University of Utah and the Flux Group.
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# 
# {{{EMULAB-LICENSE
# 
# This file is part of the Emulab network testbed software.
# 
# This file is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at
# your option) any later version.
# 
# This file is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public
# License for more details.
# 
# You should have received a copy of the GNU Affero General Public License
# along with this file.  If not, see <http://www.gnu.org/licenses/>.
# 
# }}}
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#
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import sys
import time
import getopt

sys.path.append("@prefix@/lib")

from tbevent import *

# Usage message
usage = """Example python testbed event receiver.
Usage: tbrecv.py [-h] [-s server] [-p port]

Optional arguments:
  -h       Print this message.
  -s name  The host name where the elvin event server is located.
           (Default: boss)
  -p port  The port the elvin event server is listening on.

Example output:
  Event: 1087828041:50467 * * * * TBEXAMPLE * FOO
"""

# Default values
server = "boss"
port = ""

# Process command line arguments
try:
    opts, args = getopt.getopt(sys.argv[1:],
                               "hs:p:",
                               [ "help",
                                 "server=",
                                 "port=" ])
    for opt, val in opts:
        if opt in ("-h", "--help"):
            sys.stderr.write(usage)
            sys.exit()
            pass
        elif opt in ("-s", "--server"):
            server = val
            pass
        elif opt in ("-p", "--port"):
            port = val
            pass
        else:
            sys.stderr.write("Unhandled option: " + opt + "\n")
            pass
        pass
    pass
except getopt.error:
    sys.stderr.write(usage)
    sys.exit(2)
    pass

#
# Python clients are built around the EventClient class with the "handle_event"
# method being used to process individual events.
#
class MyClient(EventClient):

    def handle_event(self, event):
        """
        Our event handler, just print out the event.
        """
        
        #
        # The "event" object is a NotificationWrapper and has all of the setter
        # and getter methods.
        #
        print ("Event: "
               + `time.time()`
               + " "
               + event.getSite()
               + " "
               + event.getExpt()
               + " "
               + event.getGroup()
               + " "
               + event.getHost()
               + " "
               + event.getObjType()
               + " "
               + event.getObjName()
               + " "
               + event.getEventType())
        return

    pass


#
# Allocate and initialize an address tuple like any other python object, there
# is no need to use address_tuple_alloc().
#
at = address_tuple()
at.host = ADDRESSTUPLE_ALL
at.objtype = "TBEXAMPLE"

# Construct our client and
mc = MyClient(server=server, port=port)

# ... subscribe to the address.
mc.subscribe(at)

# Start receiving events...
mc.run()