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annotate roundup/instance.py @ 2467:76ead526113d

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client instances may be used as translation engines. any backend translator may be passed as constructor argument or via setTranslator() method. by default, templating.translationService is used. use this engine to translate client messages.
author Alexander Smishlajev <a1s@users.sourceforge.net>
date Tue, 15 Jun 2004 09:19:49 +0000
parents fa50e1347397
children eeadb59213d8
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1 #
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2 # Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
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3 # This module is free software, and you may redistribute it and/or modify
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4 # under the same terms as Python, so long as this copyright message and
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5 # disclaimer are retained in their original form.
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6 #
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7 # IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
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8 # DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
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9 # OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
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10 # POSSIBILITY OF SUCH DAMAGE.
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11 #
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12 # BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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13 # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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14 # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
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15 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
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16 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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17 #
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18 # $Id: instance.py,v 1.14 2004-06-08 05:29:18 richard Exp $
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20 '''Tracker handling (open tracker).
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21
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22 Backwards compatibility for the old-style "imported" trackers.
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23 '''
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24 __docformat__ = 'restructuredtext'
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25
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26 import os
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27 from roundup import rlog
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28
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29 class Vars:
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30 ''' I'm just a container '''
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31
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32 class Tracker:
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33 def __init__(self, tracker_home):
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34 self.tracker_home = tracker_home
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35 self.select_db = self._load_python('select_db.py')
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36 self.config = self._load_config('config.py')
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37 raise NotImplemented, 'this is *so* not finished'
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38 self.init = XXX
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39 self.Client = XXX
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40 self.MailGW = XXX
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41
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42 def open(self):
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43 return self._load_config('schema.py').db
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44 self._load_config('security.py', db=db)
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46
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47 def _load_python(self, file):
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48 file = os.path.join(self.tracker_home, file)
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49 vars = Vars()
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50 execfile(file, vars.__dict__)
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51 return vars
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53
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54 class TrackerError(Exception):
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55 pass
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56
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57
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58 class OldStyleTrackers:
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59 def __init__(self):
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60 self.number = 0
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61 self.trackers = {}
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63 def open(self, tracker_home):
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64 ''' Open the tracker.
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65
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66 Raise ValueError if the tracker home doesn't exist.
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67 '''
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68 import imp
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69 # sanity check existence of tracker home
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70 if not os.path.exists(tracker_home):
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71 raise ValueError, 'no such directory: "%s"'%tracker_home
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72
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73 # sanity check tracker home contents
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74 for reqd in 'config dbinit select_db interfaces'.split():
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75 if not os.path.exists(os.path.join(tracker_home, '%s.py'%reqd)):
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76 raise TrackerError, 'File "%s.py" missing from tracker '\
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77 'home "%s"'%(reqd, tracker_home)
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78
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79 if self.trackers.has_key(tracker_home):
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80 return imp.load_package(self.trackers[tracker_home],
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81 tracker_home)
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82 self.number = self.number + 1
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83 modname = '_roundup_tracker_%s'%self.number
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84 self.trackers[tracker_home] = modname
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85
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86 # load the tracker
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87 tracker = imp.load_package(modname, tracker_home)
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88
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89 # ensure the tracker has all the required bits
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90 for required in 'config open init Client MailGW'.split():
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91 if not hasattr(tracker, required):
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92 raise TrackerError, \
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93 'Required tracker attribute "%s" missing'%required
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94
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95 # init the logging
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96 config = tracker.config
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97 if hasattr(config, 'LOGGING_CONFIG'):
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98 try:
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99 import logging
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100 config.logging = logging
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101 except ImportError, msg:
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102 raise TrackerError, 'Python logging module unavailable: %s'%msg
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103 config.logging.fileConfig(config.LOGGING_CONFIG)
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104 elif hasattr(config, 'LOGGING_FILENAME'):
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105 config.logging = rlog.BasicLogging()
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106 config.logging.setFile(config.LOGGING_FILENAME)
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107 if hasattr(config, 'LOGGING_LEVEL'):
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108 config.logging.setLevel(config.LOGGING_LEVEL)
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109 else:
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110 config.logging = rlog.BasicLogging()
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111 config.logging.setLevel('ERROR')
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112
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113 return tracker
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114
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115 OldStyleTrackers = OldStyleTrackers()
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116 def open(tracker_home):
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117 if os.path.exists(os.path.join(tracker_home, 'dbinit.py')):
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118 # user should upgrade...
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119 return OldStyleTrackers.open(tracker_home)
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120
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121 return Tracker(tracker_home)
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122
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123 # vim: set filetype=python ts=4 sw=4 et si
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