mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-11-16 16:54:51 +02:00
69 lines
2.0 KiB
Python
69 lines
2.0 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright (C) 2016 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import asyncio
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import os
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class FileWatcher:
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"""
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Watch for file change and call the callback when something happen
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"""
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def __init__(self, path, callback, delay=1):
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if not isinstance(path, str):
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path = str(path)
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self._path = path
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self._callback = callback
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self._delay = delay
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self._closed = False
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try:
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self._mtime = os.stat(path).st_mtime
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except OSError:
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self._mtime = None
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asyncio.get_event_loop().call_later(self._delay, self._check_config_file_change)
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def __del__(self):
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self._closed = True
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def close(self):
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self._closed = True
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def _check_config_file_change(self):
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if self._closed:
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return
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changed = False
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try:
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if os.stat(self._path).st_mtime != self._mtime:
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changed = True
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self._mtime = os.stat(self._path).st_mtime
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except OSError:
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self._mtime = None
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if changed:
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self._callback(self._path)
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asyncio.get_event_loop().call_later(self._delay, self._check_config_file_change)
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@property
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def callback(self):
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return self._callback
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@callback.setter
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def callback(self, val):
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self._callback = val
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