93 lines
3.4 KiB
Python
93 lines
3.4 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# Copyright 2011 Yesudeep Mangalapilly <yesudeep@gmail.com>
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# Copyright 2012 Google, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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:module: watchdog.observers
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:synopsis: Observer that picks a native implementation if available.
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:author: yesudeep@google.com (Yesudeep Mangalapilly)
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Classes
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=======
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.. autoclass:: Observer
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:members:
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:show-inheritance:
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:inherited-members:
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Observer thread that schedules watching directories and dispatches
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calls to event handlers.
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You can also import platform specific classes directly and use it instead
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of :class:`Observer`. Here is a list of implemented observer classes.:
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============== ================================ ==============================
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Class Platforms Note
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============== ================================ ==============================
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|Inotify| Linux 2.6.13+ ``inotify(7)`` based observer
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|FSEvents| Mac OS X FSEvents based observer
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|Kqueue| Mac OS X and BSD with kqueue(2) ``kqueue(2)`` based observer
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|WinApi| MS Windows Windows API-based observer
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|Polling| Any fallback implementation
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============== ================================ ==============================
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.. |Inotify| replace:: :class:`.inotify.InotifyObserver`
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.. |FSEvents| replace:: :class:`.fsevents.FSEventsObserver`
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.. |Kqueue| replace:: :class:`.kqueue.KqueueObserver`
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.. |WinApi| replace:: :class:`.read_directory_changes.WindowsApiObserver`
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.. |WinApiAsync| replace:: :class:`.read_directory_changes_async.WindowsApiAsyncObserver`
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.. |Polling| replace:: :class:`.polling.PollingObserver`
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"""
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import warnings
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from ..utils import platform
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from ..utils import UnsupportedLibc
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if platform.is_linux():
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try:
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from .inotify import InotifyObserver as Observer
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except UnsupportedLibc:
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from .polling import PollingObserver as Observer
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elif platform.is_darwin():
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# FIXME: catching too broad. Error prone
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try:
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from .fsevents import FSEventsObserver as Observer
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except:
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try:
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from .kqueue import KqueueObserver as Observer
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warnings.warn("Failed to import fsevents. Fall back to kqueue")
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except:
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from .polling import PollingObserver as Observer
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warnings.warn("Failed to import fsevents and kqueue. Fall back to polling.")
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elif platform.is_bsd():
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from .kqueue import KqueueObserver as Observer
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elif platform.is_windows():
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# TODO: find a reliable way of checking Windows version and import
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# polling explicitly for Windows XP
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try:
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from .read_directory_changes import WindowsApiObserver as Observer
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except:
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from .polling import PollingObserver as Observer
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warnings.warn("Failed to import read_directory_changes. Fall back to polling.")
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else:
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from .polling import PollingObserver as Observer
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