Mercurial > libervia-backend
annotate frontends/src/bridge/bridge_frontend.py @ 2109:85f3e12e984d
core (memory/cache): file caching handling, first draft:
instead of having file caching handled individually by plugins, a generic module has been added in memory.
- Cache can be global or associated to a profile. In the later case, client.cache can be used.
- Cache are managed with unique ids (which can be any unique unicode, hash uuid, or something else).
- To know if a file is in cache, getFilePath is used: if the file is in cache, its absolute path is returned, else None is returned.
- To cache a file, cacheData is used with at list the source of cache (most of time plugin import name), and unique id. The method return file opened in binary writing mode (so cacheData can - and should - be used with "with" statement).
- 2 files will be created: a metadata file (named after the unique id), and the actual file.
- each file has a end of life time, after it, the cache is invalidated and the file must be requested again.
author | Goffi <goffi@goffi.org> |
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date | Thu, 05 Jan 2017 20:23:38 +0100 |
parents | e0066920a661 |
children | 4b78b4c7f805 |
rev | line source |
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1934
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use of /usr/bin/env instead of /usr/bin/python in shebang
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1 #!/usr/bin/env python2 |
0 | 2 #-*- coding: utf-8 -*- |
3 | |
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4 # SAT communication bridge |
1766 | 5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org) |
0 | 6 |
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7 # This program is free software: you can redistribute it and/or modify |
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8 # it under the terms of the GNU Affero General Public License as published by |
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9 # the Free Software Foundation, either version 3 of the License, or |
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10 # (at your option) any later version. |
0 | 11 |
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12 # This program is distributed in the hope that it will be useful, |
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 # GNU Affero General Public License for more details. |
0 | 16 |
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17 # You should have received a copy of the GNU Affero General Public License |
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
0 | 19 |
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20 |
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bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
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21 class BridgeFrontend(object): |
0 | 22 |
23 def register(self, functionName, handler): | |
24 raise NotImplementedError | |
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25 |
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26 |
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27 class BridgeException(Exception): |
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28 """An exception which has been raised from the backend and arrived to the frontend.""" |
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29 |
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30 def __init__(self, name, message='', condition=''): |
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31 """ |
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32 |
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33 @param name (str): full exception class name (with module) |
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34 @param message (str): error message |
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35 @param condition (str) : error condition |
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36 """ |
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37 Exception.__init__(self) |
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38 self.fullname = unicode(name) |
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39 self.message = unicode(message) |
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40 self.condition = unicode(condition) if condition else '' |
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41 self.module, dummy, self.classname = unicode(self.fullname).rpartition('.') |
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42 |
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43 def __str__(self): |
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44 message = (': %s' % self.message) if self.message else '' |
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45 return self.classname + message |
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46 |
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47 def __eq__(self, other): |
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48 return self.classname == other |