root / lib / asyncnotifier.py @ 680f0a89
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1 | a8a76bc2 | Guido Trotter | #
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2 | a8a76bc2 | Guido Trotter | #
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3 | a8a76bc2 | Guido Trotter | |
4 | a8a76bc2 | Guido Trotter | # Copyright (C) 2009 Google Inc.
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5 | a8a76bc2 | Guido Trotter | #
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6 | a8a76bc2 | Guido Trotter | # This program is free software; you can redistribute it and/or modify
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7 | a8a76bc2 | Guido Trotter | # it under the terms of the GNU General Public License as published by
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8 | a8a76bc2 | Guido Trotter | # the Free Software Foundation; either version 2 of the License, or
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9 | a8a76bc2 | Guido Trotter | # (at your option) any later version.
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10 | a8a76bc2 | Guido Trotter | #
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11 | a8a76bc2 | Guido Trotter | # This program is distributed in the hope that it will be useful, but
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12 | a8a76bc2 | Guido Trotter | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a8a76bc2 | Guido Trotter | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | a8a76bc2 | Guido Trotter | # General Public License for more details.
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15 | a8a76bc2 | Guido Trotter | #
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16 | a8a76bc2 | Guido Trotter | # You should have received a copy of the GNU General Public License
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17 | a8a76bc2 | Guido Trotter | # along with this program; if not, write to the Free Software
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18 | a8a76bc2 | Guido Trotter | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | a8a76bc2 | Guido Trotter | # 02110-1301, USA.
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20 | a8a76bc2 | Guido Trotter | |
21 | a8a76bc2 | Guido Trotter | |
22 | a8a76bc2 | Guido Trotter | """Asynchronous pyinotify implementation"""
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23 | a8a76bc2 | Guido Trotter | |
24 | a8a76bc2 | Guido Trotter | |
25 | a8a76bc2 | Guido Trotter | import asyncore |
26 | a8a76bc2 | Guido Trotter | |
27 | ad54f3d2 | Guido Trotter | try:
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28 | 7260cfbe | Iustin Pop | # pylint: disable-msg=E0611
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29 | 6af8a903 | Iustin Pop | from pyinotify import pyinotify |
30 | ad54f3d2 | Guido Trotter | except ImportError: |
31 | 6af8a903 | Iustin Pop | import pyinotify |
32 | ad54f3d2 | Guido Trotter | |
33 | a8a76bc2 | Guido Trotter | |
34 | a8a76bc2 | Guido Trotter | class AsyncNotifier(asyncore.file_dispatcher): |
35 | a8a76bc2 | Guido Trotter | """An asyncore dispatcher for inotify events.
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36 | a8a76bc2 | Guido Trotter |
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37 | a8a76bc2 | Guido Trotter | """
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38 | 7260cfbe | Iustin Pop | # pylint: disable-msg=W0622,W0212
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39 | 69b99987 | Michael Hanselmann | def __init__(self, watch_manager, default_proc_fun=None, map=None): |
40 | 69b99987 | Michael Hanselmann | """Initializes this class.
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41 | 69b99987 | Michael Hanselmann |
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42 | 69b99987 | Michael Hanselmann | This is a a special asyncore file_dispatcher that actually wraps a
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43 | 69b99987 | Michael Hanselmann | pyinotify Notifier, making it asyncronous.
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44 | a8a76bc2 | Guido Trotter |
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45 | a8a76bc2 | Guido Trotter | """
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46 | a8a76bc2 | Guido Trotter | if default_proc_fun is None: |
47 | 69b99987 | Michael Hanselmann | default_proc_fun = pyinotify.ProcessEvent() |
48 | 69b99987 | Michael Hanselmann | |
49 | a8a76bc2 | Guido Trotter | self.notifier = pyinotify.Notifier(watch_manager, default_proc_fun)
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50 | 69b99987 | Michael Hanselmann | |
51 | a8a76bc2 | Guido Trotter | # here we need to steal the file descriptor from the notifier, so we can
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52 | a8a76bc2 | Guido Trotter | # use it in the global asyncore select, and avoid calling the
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53 | a8a76bc2 | Guido Trotter | # check_events() function of the notifier (which doesn't allow us to select
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54 | a8a76bc2 | Guido Trotter | # together with other file descriptors)
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55 | a8a76bc2 | Guido Trotter | self.fd = self.notifier._fd |
56 | a8a76bc2 | Guido Trotter | asyncore.file_dispatcher.__init__(self, self.fd, map) |
57 | a8a76bc2 | Guido Trotter | |
58 | a8a76bc2 | Guido Trotter | def handle_read(self): |
59 | a8a76bc2 | Guido Trotter | self.notifier.read_events()
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60 | a8a76bc2 | Guido Trotter | self.notifier.process_events() |