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annotate roundup/backends/back_bsddb3.py @ 2633:a9e1fff1e793

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I thought I committed this last night. Ho hum. - This implements most of the rest of the new tracker config layout: - dbinit.py split between schema.py and initial_data.py - interfaces.py gone - tracker and detectors __init__.py gone - Added some missing functionality to backends: db_exists test and db_nuke. - Implemented configuration file options in postgresql backend. - Cleaned up tracker initialisation a lot.
author Richard Jones <richard@users.sourceforge.net>
date Tue, 27 Jul 2004 00:57:19 +0000
parents 091711fb2f8c
children 11811b313459
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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_bsddb3.py,v 1.25 2004-07-27 00:57:18 richard Exp $
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19 '''This module defines a backend that saves the hyperdatabase in BSDDB3.
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20 '''
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21 __docformat__ = 'restructuredtext'
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22
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23 import bsddb3, os, marshal, errno, shutil
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24 from roundup import hyperdb, date
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25
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26 # these classes are so similar, we just use the anydbm methods
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27 from back_anydbm import Database, Class, FileClass, IssueClass
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29 def db_exists(config):
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30 return os.path.exists(os.path.join(config.TRACKER_HOME, 'db', 'user'))
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31
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32 def db_nuke(config):
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33 shutil.rmtree(os.path.join(config.TRACKER_HOME, 'db'))
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34
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35 #
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36 # Now the database
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37 #
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38 class Database(Database):
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39 """A database for storing records containing flexible data types."""
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40 #
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41 # Class DBs
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42 #
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43 def clear(self):
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44 for cn in self.classes.keys():
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45 for name in 'nodes.%s'%cn, 'journals.%s'%cn:
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46 try:
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47 os.remove(os.path.join(self.dir, name))
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48 except os.error, error:
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49 if error.errno != errno.ENOENT:
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50 raise
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51
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52 def getclassdb(self, classname, mode='r'):
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53 ''' grab a connection to the class db that will be used for
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54 multiple actions
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55 '''
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56 path = os.path.join(os.getcwd(), self.dir, 'nodes.%s'%classname)
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57 if os.path.exists(path):
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58 return bsddb3.btopen(path, mode)
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59 else:
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60 return bsddb3.btopen(path, 'c')
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61
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62 def opendb(self, name, mode):
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63 '''Low-level database opener that gets around anydbm/dbm
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64 eccentricities.
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65 '''
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66 # determine which DB wrote the class file
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67 path = os.path.join(os.getcwd(), self.dir, name)
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68 if not os.path.exists(path):
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69 if __debug__:
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70 self.config.logging.getLogger('hyperdb').debug("opendb bsddb3.open(%r, 'c')"%path)
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71 return bsddb3.btopen(path, 'c')
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72
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73 # open the database with the correct module
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74 if __debug__:
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75 self.config.logging.getLogger('hyperdb').debug("opendb bsddb3.open(%r, %r)"%(path, mode))
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76 return bsddb3.btopen(path, mode)
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77
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78 #
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79 # Journal
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80 #
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81 def getjournal(self, classname, nodeid):
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82 ''' get the journal for id
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83
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84 Raise IndexError if the node doesn't exist (as per history()'s
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85 API)
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86 '''
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87 # our journal result
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88 res = []
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89
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90 # add any journal entries for transactions not committed to the
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91 # database
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92 for method, args in self.transactions:
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93 if method != self.doSaveJournal:
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94 continue
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95 (cache_classname, cache_nodeid, cache_action, cache_params,
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96 cache_creator, cache_creation) = args
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97 if cache_classname == classname and cache_nodeid == nodeid:
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98 if not cache_creator:
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99 cache_creator = self.getuid()
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100 if not cache_creation:
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101 cache_creation = date.Date()
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102 res.append((cache_nodeid, cache_creation, cache_creator,
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103 cache_action, cache_params))
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104
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105 # attempt to open the journal - in some rare cases, the journal may
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106 # not exist
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107 try:
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108 db = bsddb3.btopen(os.path.join(self.dir, 'journals.%s'%classname),
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109 'r')
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110 except bsddb3._db.DBNoSuchFileError:
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111 if res:
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112 # we have unsaved journal entries, return them
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113 return res
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114 raise IndexError, 'no such %s %s'%(classname, nodeid)
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115 # more handling of bad journals
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116 if not db.has_key(nodeid):
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117 db.close()
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118 if res:
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119 # we have some unsaved journal entries, be happy!
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120 return res
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121 raise IndexError, 'no such %s %s'%(classname, nodeid)
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122 journal = marshal.loads(db[nodeid])
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123 db.close()
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124
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125 # add all the saved journal entries for this node
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126 for nodeid, date_stamp, user, action, params in journal:
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127 res.append((nodeid, date.Date(date_stamp), user, action, params))
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128 return res
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129
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130 def getCachedJournalDB(self, classname):
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131 ''' get the journal db, looking in our cache of databases for commit
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132 '''
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133 # get the database handle
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134 db_name = 'journals.%s'%classname
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135 if self.databases.has_key(db_name):
974a4b94c5e3 Implemented the destroy() method needed by the session database...
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136 return self.databases[db_name]
974a4b94c5e3 Implemented the destroy() method needed by the session database...
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parents: 858
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137 else:
974a4b94c5e3 Implemented the destroy() method needed by the session database...
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138 db = bsddb3.btopen(os.path.join(self.dir, db_name), 'c')
974a4b94c5e3 Implemented the destroy() method needed by the session database...
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139 self.databases[db_name] = db
974a4b94c5e3 Implemented the destroy() method needed by the session database...
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140 return db
974a4b94c5e3 Implemented the destroy() method needed by the session database...
Richard Jones <richard@users.sourceforge.net>
parents: 858
diff changeset
141
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