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annotate roundup/backends/back_bsddb.py @ 440:de5bf4191f11

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Enabled transaction support in the bsddb backend. It uses the anydbm code where possible, only replacing methods where the db is opened (it uses the btree opener specifically.) Also cleaned up some change note generation. Made the backends package work with pydoc too.
author Richard Jones <richard@users.sourceforge.net>
date Mon, 10 Dec 2001 22:20:01 +0000
parents f43af1e97fdd
children e346a9792335 c242455d9b46
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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: back_bsddb.py,v 1.13 2001-12-10 22:20:01 richard Exp $
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19 '''
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20 This module defines a backend that saves the hyperdatabase in BSDDB.
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21 '''
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23 import bsddb, os, marshal
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24 from roundup import hyperdb, date, password
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26 # these classes are so similar, we just use the anydbm methods
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27 import back_anydbm
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29 #
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30 # Now the database
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31 #
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32 class Database(back_anydbm.Database):
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33 """A database for storing records containing flexible data types."""
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34 #
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35 # Class DBs
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36 #
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37 def clear(self):
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38 for cn in self.classes.keys():
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39 db = os.path.join(self.dir, 'nodes.%s'%cn)
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40 bsddb.btopen(db, 'n')
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41 db = os.path.join(self.dir, 'journals.%s'%cn)
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42 bsddb.btopen(db, 'n')
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43
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44 def getclassdb(self, classname, mode='r'):
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45 ''' grab a connection to the class db that will be used for
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46 multiple actions
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47 '''
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48 path = os.path.join(os.getcwd(), self.dir, 'nodes.%s'%classname)
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49 if os.path.exists(path):
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50 return bsddb.btopen(path, mode)
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51 else:
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52 return bsddb.btopen(path, 'n')
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54 #
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55 # Journal
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56 #
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57 def getjournal(self, classname, nodeid):
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58 ''' get the journal for id
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59 '''
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60 # attempt to open the journal - in some rare cases, the journal may
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61 # not exist
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62 try:
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63 db = bsddb.btopen(os.path.join(self.dir, 'journals.%s'%classname),
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64 'r')
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65 except bsddb.error, error:
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66 if error.args[0] != 2: raise
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67 return []
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68 # mor handling of bad journals
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69 if not db.has_key(nodeid): return []
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70 journal = marshal.loads(db[nodeid])
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71 res = []
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72 for entry in journal:
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73 (nodeid, date_stamp, self.journaltag, action, params) = entry
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74 date_obj = date.Date(date_stamp)
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75 res.append((nodeid, date_obj, self.journaltag, action, params))
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76 db.close()
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77 return res
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78
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79 def _doSaveJournal(self, classname, nodeid, action, params):
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80 entry = (nodeid, date.Date().get_tuple(), self.journaltag, action,
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81 params)
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82 db = bsddb.btopen(os.path.join(self.dir, 'journals.%s'%classname), 'c')
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83 if db.has_key(nodeid):
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84 s = db[nodeid]
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85 l = marshal.loads(db[nodeid])
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86 l.append(entry)
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87 else:
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88 l = [entry]
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89 db[nodeid] = marshal.dumps(l)
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90 db.close()
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91
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92 #
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93 #$Log: not supported by cvs2svn $
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94 #Revision 1.12 2001/11/21 02:34:18 richard
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95 #Added a target version field to the extended issue schema
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96 #
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97 #Revision 1.11 2001/10/09 23:58:10 richard
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98 #Moved the data stringification up into the hyperdb.Class class' get, set
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99 #and create methods. This means that the data is also stringified for the
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100 #journal call, and removes duplication of code from the backends. The
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101 #backend code now only sees strings.
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102 #
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103 #Revision 1.10 2001/10/09 07:25:59 richard
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104 #Added the Password property type. See "pydoc roundup.password" for
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105 #implementation details. Have updated some of the documentation too.
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106 #
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107 #Revision 1.9 2001/08/12 06:32:36 richard
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108 #using isinstance(blah, Foo) now instead of isFooType
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109 #
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110 #Revision 1.8 2001/08/07 00:24:42 richard
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111 #stupid typo
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112 #
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113 #Revision 1.7 2001/08/07 00:15:51 richard
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114 #Added the copyright/license notice to (nearly) all files at request of
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115 #Bizar Software.
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116 #
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117 #Revision 1.6 2001/07/30 02:36:23 richard
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118 #Handle non-existence of db files in the other backends (code from anydbm).
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119 #
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120 #Revision 1.5 2001/07/30 01:41:36 richard
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121 #Makes schema changes mucho easier.
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122 #
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123 #Revision 1.4 2001/07/23 08:25:33 richard
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124 #more handling of bad journals
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125 #
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126 #Revision 1.3 2001/07/23 08:20:44 richard
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127 #Moved over to using marshal in the bsddb and anydbm backends.
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128 #roundup-admin now has a "freshen" command that'll load/save all nodes (not
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129 # retired - mod hyperdb.Class.list() so it lists retired nodes)
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130 #
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131 #Revision 1.2 2001/07/23 07:56:05 richard
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132 #Storing only marshallable data in the db - no nasty pickled class references.
671203878652 Moved over to using marshal in the bsddb and anydbm backends.
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133 #
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134 #Revision 1.1 2001/07/23 07:22:13 richard
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135 #*sigh* some databases have _foo.so as their underlying implementation.
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136 #This time for sure, Rocky.
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137 #
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138 #Revision 1.1 2001/07/23 07:15:57 richard
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139 #Moved the backends into the backends package. Anydbm hasn't been tested at all.
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140 #
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141 #Revision 1.1 2001/07/23 06:23:41 richard
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142 #moved hyper_bsddb.py to the new backends package as bsddb.py
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143 #
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144 #Revision 1.2 2001/07/22 12:09:32 richard
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145 #Final commit of Grande Splite
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146 #
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147 #Revision 1.1 2001/07/22 11:58:35 richard
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148 #More Grande Splite
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149 #
Roundup Issue Tracker: http://roundup-tracker.org/