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annotate roundup/instance.py @ 2077:3e0961d6d44d

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Added the "actor" property. Metakit backend not done (still not confident I know how it's supposed to work ;) Currently it will come up as NULL in the RDBMS backends for older items. The *dbm backends will look up the journal. I hope to remedy the former before 0.7's release. Fixed a bunch of migration issues in the rdbms backends while I was at it (index changes for key prop changes) and simplified the class table update code for RDBMSes that have "alter table" in their command set (ie. not sqlite) ... migration from "version 1" to "version 2" still hasn't actually been tested yet though.
author Richard Jones <richard@users.sourceforge.net>
date Mon, 15 Mar 2004 05:50:20 +0000
parents fc52d57c6c3e
children 69f7eaf96963 c77483d2cda4
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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 1.12 2004-02-11 23:55:08 richard Exp $
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20 '''Tracker handling (open tracker).
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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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26 import os
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27
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28 class Vars:
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29 ''' I'm just a container '''
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31 class Tracker:
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32 def __init__(self, tracker_home):
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33 self.tracker_home = tracker_home
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34 self.select_db = self._load_python('select_db.py')
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35 self.config = self._load_config('config.py')
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36 raise NotImplemented, 'this is *so* not finished'
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37 self.init = XXX
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38 self.Client = XXX
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39 self.MailGW = XXX
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41 def open(self):
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42 return self._load_config('schema.py').db
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43 self._load_config('security.py', db=db)
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46 def _load_python(self, file):
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47 file = os.path.join(tracker_home, file)
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48 vars = Vars()
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49 execfile(file, vars.__dict__)
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50 return vars
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53 class TrackerError(Exception):
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54 pass
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57 class OldStyleTrackers:
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58 def __init__(self):
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59 self.number = 0
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60 self.trackers = {}
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62 def open(self, tracker_home):
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63 ''' Open the tracker.
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65 Raise ValueError if the tracker home doesn't exist.
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66 '''
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67 import imp
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68 # sanity check existence of tracker home
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69 if not os.path.exists(tracker_home):
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70 raise ValueError, 'no such directory: "%s"'%tracker_home
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72 # sanity check tracker home contents
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73 for reqd in 'config dbinit select_db interfaces'.split():
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74 if not os.path.exists(os.path.join(tracker_home, '%s.py'%reqd)):
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75 raise TrackerError, 'File "%s.py" missing from tracker '\
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76 'home "%s"'%(reqd, tracker_home)
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78 if self.trackers.has_key(tracker_home):
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79 return imp.load_package(self.trackers[tracker_home],
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80 tracker_home)
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81 self.number = self.number + 1
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82 modname = '_roundup_tracker_%s'%self.number
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83 self.trackers[tracker_home] = modname
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84
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85 # load the tracker
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86 tracker = imp.load_package(modname, tracker_home)
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87
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88 # ensure the tracker has all the required bits
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89 for required in 'config open init Client MailGW'.split():
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90 if not hasattr(tracker, required):
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91 raise TrackerError, \
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92 'Required tracker attribute "%s" missing'%required
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94 return tracker
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96 OldStyleTrackers = OldStyleTrackers()
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97 def open(tracker_home):
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98 if os.path.exists(os.path.join(tracker_home, 'dbinit.py')):
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99 # user should upgrade...
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100 return OldStyleTrackers.open(tracker_home)
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102 return Tracker(tracker_home)
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104 # vim: set filetype=python ts=4 sw=4 et si
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