forked from platypush/platypush
81 lines
2.8 KiB
Python
81 lines
2.8 KiB
Python
import os
|
|
|
|
from platypush.backend import Backend
|
|
from platypush.message.event.path import PathCreateEvent, PathDeleteEvent, \
|
|
PathOpenEvent, PathModifyEvent, PathPermissionsChangeEvent, PathCloseEvent
|
|
|
|
|
|
class InotifyBackend(Backend):
|
|
"""
|
|
(Linux only) This backend will listen for events on the filesystem (whether
|
|
a file/directory on a watch list is opened, modified, created, deleted,
|
|
closed or had its permissions changed) and will trigger a relevant event.
|
|
|
|
Triggers:
|
|
|
|
* :class:`platypush.message.event.path.PathCreateEvent` if a resource is created
|
|
* :class:`platypush.message.event.path.PathOpenEvent` if a resource is opened
|
|
* :class:`platypush.message.event.path.PathModifyEvent` if a resource is modified
|
|
* :class:`platypush.message.event.path.PathPermissionsChangeEvent` if the permissions of a resource are changed
|
|
* :class:`platypush.message.event.path.PathCloseEvent` if a resource is closed
|
|
* :class:`platypush.message.event.path.PathDeleteEvent` if a resource is removed
|
|
|
|
Requires:
|
|
|
|
* **inotify** (``pip install inotify``)
|
|
"""
|
|
|
|
inotify_watch = None
|
|
|
|
def __init__(self, watch_paths=[], **kwargs):
|
|
"""
|
|
:param watch_paths: Filesystem resources to watch for events
|
|
:type watch_paths: str
|
|
"""
|
|
|
|
super().__init__(**kwargs)
|
|
self.watch_paths = set(map(
|
|
lambda path: os.path.abspath(os.path.expanduser(path)),
|
|
watch_paths))
|
|
|
|
def _cleanup(self):
|
|
if not self.inotify_watch:
|
|
return
|
|
|
|
for path in self.watch_paths:
|
|
self.inotify_watch.remove_watch(path)
|
|
|
|
self.inotify_watch = None
|
|
|
|
def run(self):
|
|
import inotify.adapters
|
|
super().run()
|
|
|
|
self.inotify_watch = inotify.adapters.Inotify()
|
|
for path in self.watch_paths:
|
|
self.inotify_watch.add_watch(path)
|
|
|
|
self.logger.info('Initialized inotify file monitoring backend, monitored resources: {}'
|
|
.format(self.watch_paths))
|
|
|
|
try:
|
|
for inotify_event in self.inotify_watch.event_gen():
|
|
if inotify_event is not None:
|
|
(header, inotify_types, watch_path, filename) = inotify_event
|
|
event = None
|
|
|
|
if 'IN_OPEN' in inotify_types:
|
|
event = PathOpenEvent(path=watch_path)
|
|
elif 'IN_MODIFY' in inotify_types:
|
|
event = PathModifyEvent(path=watch_path)
|
|
elif 'IN_CLOSE_WRITE' in inotify_types or 'IN_CLOSE_NOWRITE' in inotify_types:
|
|
event = PathCloseEvent(path=watch_path)
|
|
|
|
if event:
|
|
self.bus.post(event)
|
|
finally:
|
|
self._cleanup()
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|
|
|