def __init__(self, timeout, nshost, debug):
Pyro.core.ObjBase.__init__(self)
self.debug = debug
self.nshost = nshost
self.instance_uri = None
self.host = None
#fork a WatchDog thread, which sleeps all the time and quits if it
#hasn't been pinged after timeout minutes, by calling self.watchdog.set(xxx)
#where xxx is a float (the current time).
self.watchdog = WatchDog(timeout, debug, logfile='watchdog.debug')
self.watchdog.start()
class PyroHandler(Pyro.core.ObjBase):
"""
Runs on remote side, non-specific object.
It is a tool to launch instances of any picklable object
on the remote host (where it resides)
If PyroHandler is idle longer than .timeout time, it kills itself
on the remote side (together with all registered instances)
Returns: raw Pyro proxy
"""
def __init__(self, timeout, nshost, debug):
Pyro.core.ObjBase.__init__(self)
self.debug = debug
self.nshost = nshost
self.instance_uri = None
self.host = None
#fork a WatchDog thread, which sleeps all the time and quits if it
#hasn't been pinged after timeout minutes, by calling self.watchdog.set(xxx)
#where xxx is a float (the current time).
self.watchdog = WatchDog(timeout, debug, logfile='watchdog.debug')
self.watchdog.start()
def set(self, time):
self.watchdog.set(time)
def publish(self, instance, instance_uri, delegate):
"""
delegate = False for descendants of Pyro.core.ObjBase
Publishes a copy of the instance on the host where PyroHandler
is running.
"""
if self.debug:
print 'PyroHandler.publish: publishing instance %s with URI %s' % (instance, instance_uri)
self.t = threading.Thread(target = PyroUtils.launch_instance, \
args = (instance, instance_uri, delegate,
self.nshost, self.debug, False))
self.t.start()
self.instance_uri = instance_uri
## to enable cleaning up upon remote shutdown
atexit.register(self.terminate)
def terminate(self):
## called from PyroProxy.terminate or on sys.exit (WatchDog call)
if self.debug:
print 'PyroHandler.terminate: %s terminating... ' % self
##--- call terminate only
## if the handler is already terminated (e.g. by hands)
## then function is not called on the exit
topop = [atexit._exithandlers[i][0] == self.terminate
for i in range(len(atexit._exithandlers))]
if True in topop:
atexit._exithandlers.pop( topop.index(True) )
##--- unregister from the nameserver
## it will waits PyroUtils.default_timeout to let it
## finish self-unregistration
if not self.instance_uri == None:
PyroUtils.unregister(self.instance_uri, ns = self.nshost)
##--- shuts down remote process
## will leave interpreter alive if debug = True
## PyroHandler itself is an object instance managed
## by Pyro.core.Daemon, hence will be stopped by setting
## PyroHandler._pyro_stop to True
self._pyro_stop = True
## PyroUtils.is_stopped(self._pyro_suppl['uri'], ns = self.nshost)
##
## but also it may cause problems when running without xterm (unconfirmed)
## because it shuts down the python process (daemon.shutdown()) causing
## connection lost error
def __str__(self):
if hasattr(self, '_pyro_suppl'):
s = '%s(uri="%s", host="%s")' % (self.__class__.__name__, \
self._pyro_suppl['uri'], self._pyro_suppl['host'])
else:
s = self.__class__.__name__
return s
