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PyroDaemon.py
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PyroDaemon.py
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"""PyroDaemon: Wrapper class around pyro daemon
__author__ = "gemalto http:https://www.gemalto.com"
Copyright 2001-2012 gemalto
Author: Jean-Daniel Aussel, mailto:[email protected]
This file is part of pyscard.
pyscard is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
pyscard 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with pyscard; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
"""
import signal
from threading import Thread
import time
import Pyro.core
import Pyro.naming
class PyroDaemon(object):
"""Singleton class to wrap the pyro daemon."""
class _PyroDaemon:
"""The pyro daemon actual wrapper class.
A single instance of this class is created
by the public PyroDaemon class.
"""
def __init__(self):
self.daemon = Pyro.core.Daemon()
self.handler = signal.signal(signal.SIGINT, self)
ns = Pyro.naming.NameServerLocator().getNS()
self.daemon.useNameServer(ns)
def __call__(self, signame, sf):
"""Ctrl+c handler that will gracefully shutdown the server
upon Ctrl+C signal"""
print 'PyroDaemon Ctrl+C handler'
self.daemon.shutdown(True)
time.sleep(1)
self.handler(signame, sf)
def connect(self, object, name=None):
return self.daemon.connect(object, name)
def disconnect(self, object):
return self.daemon.disconnect(object)
def start(self):
"""start pyro daemon."""
self.daemon.requestLoop()
# the singleton
instance = None
def __init__(self):
if not PyroDaemon.instance:
PyroDaemon.instance = PyroDaemon._PyroDaemon()
def __getattr__(self, name):
return getattr(self.instance, name)
class PyroDaemonThread(Thread):
"""Thread running the Pyro daemon server.
"""
def __init__(self):
"""Initialize pyro event server with command line arguments.
For a complete list of command line arguments, see pyro documentation
for pyro-es start script."""
Thread.__init__(self)
self.setDaemon(True)
self.setName('smartcard.pyro.server.PyroDaemonThread')
self._daemon = PyroDaemon()
def run(self):
"""Starts Pyro daemon."""
self._daemon.start()