def __init__(self, eq, fs, ignore_config=None, timeout=1):
self.log = logging.getLogger('ubuntuone.SyncDaemon.FSMonitor')
self.log.setLevel(TRACE)
self._processor = NotifyProcessor(self, ignore_config)
self.fs = fs
self.eq = eq
self._factory = PyInotifyEventsFactory(self._processor)
self._protocol = None
class FilesystemMonitor(object):
"""Implementation that allows to receive events from the system."""
def __init__(self, eq, fs, ignore_config=None, timeout=1):
self.log = logging.getLogger('ubuntuone.SyncDaemon.FSMonitor')
self.log.setLevel(TRACE)
self._processor = NotifyProcessor(self, ignore_config)
self.fs = fs
self.eq = eq
self._factory = PyInotifyEventsFactory(self._processor)
self._protocol = None
@classmethod
def is_available_monitor(cls):
"""Return if the monitor can be used in the platform."""
# can only be used if the daemon is running
return is_daemon_running()
@defer.inlineCallbacks
def _connect_to_daemon(self):
"""Connect to the daemon so that we can receive events."""
description = 'unix:path=%s' % DAEMON_SOCKET
client = endpoints.clientFromString(reactor, description)
self._protocol = yield client.connect(self._factory)
# add the user with no paths
yield self._protocol.add_user([])
def add_to_mute_filter(self, event, **info):
"""Add info to mute filter in the processor."""
self._processor.add_to_mute_filter(event, info)
def rm_from_mute_filter(self, event, **info):
"""Remove info to mute filter in the processor."""
self._processor.rm_from_mute_filter(event, info)
def shutdown(self):
"""Prepares the EQ to be closed."""
if self._protocol is not None:
def on_user_removed(data):
"""We managed to remove the user."""
self._protocol.transport.loseConnection()
self._protocol = None
return True
def on_user_not_removed(reason):
"""We did not manage to remove the user."""
return True
d = self._protocol.remove_user()
d.addCallback(on_user_removed)
d.addErrback(on_user_not_removed)
return d
return defer.succeed(True)
@defer.inlineCallbacks
def rm_watch(self, dirpath):
"""Remove watch from a dir."""
# in mac os x we are only watching the parent watches, this is an
# important details because we will only send a real remove_path to the
# daemon if the path is the parent path else we will filter it in the
# factory level
if not dirpath[-1] == os.path.sep:
dirpath += os.path.sep
if dirpath not in self._factory.watched_paths:
# we are watching a parent path but we are not a root one
# therefore we are going to add it as an ignored path and
# return
self._factory.ignored_paths.append(dirpath)
defer.returnValue(None)
# if we got to this point we want to remove a root dir, this is an
# important detail to take care of. Connect if needed and tell the
# daemon to remove the path
if self._protocol is None:
# we have not yet connected, lets do it!
yield self._connect_to_daemon()
was_removed = yield self._protocol.remove_path(dirpath)
# only remove it if we really removed it
if was_removed:
self._factory.watched_paths.remove(dirpath)
@defer.inlineCallbacks
def add_watch(self, dirpath):
"""Add watch to a dir."""
if not dirpath[-1] == os.path.sep:
dirpath = dirpath + os.path.sep
# if we are watching a parent dir we can just ensure that it is not
# ignored
parent_watched = any(dirpath.startswith(watched_path)
for watched_path in self._factory.watched_paths)
if parent_watched:
if dirpath in self._factory.ignored_paths:
self._factory.ignored_paths.remove(dirpath)
defer.returnValue(True)
if dirpath in self._factory.ignored_paths:
self._factory.ignored_paths.remove(dirpath)
defer.returnValue(True)
if self._protocol is None:
# we have not yet connected, lets do it!
yield self._connect_to_daemon()
was_added = yield self._protocol.add_path(dirpath)
if was_added:
self._factory.watched_paths.append(dirpath)
defer.returnValue(True)
def add_watches_to_udf_ancestors(self, volume):
"""Add a inotify watch to volume's ancestors if it's an UDF."""
# On Mac OS X we do no need to add watches to the ancestors because we
# will get the events from them with no problem.
return defer.succeed(True)
def is_frozen(self):
"""Checks if there's something frozen."""
return self._processor.frozen_path is not None
def freeze_begin(self, path):
"""Puts in hold all the events for this path."""
if self._processor.frozen_path is not None:
raise ValueError("There's something already frozen!")
self._processor.freeze_begin(path)
def freeze_rollback(self):
"""Unfreezes the frozen path, reseting to idle state."""
if self._processor.frozen_path is None:
raise ValueError("Rolling back with nothing frozen!")
self._processor.freeze_rollback()
def freeze_commit(self, events):
"""Unfreezes the frozen path, sending received events if not dirty.
If events for that path happened:
- return True
else:
- push the here received events, return False
"""
if self._processor.frozen_path is None:
raise ValueError("Committing with nothing frozen!")
d = defer.execute(self._processor.freeze_commit, events)
return d