Mercurial > p > roundup > code

annotate roundup/backends/blobfiles.py @ 825:0779ea9f1f18

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More indexer work: - all String properties may now be indexed too. Currently there's a bit of "issue" specific code in the actual searching which needs to be addressed. In a nutshell: + pass 'indexme="yes"' as a String() property initialisation arg, eg: file = FileClass(db, "file", name=String(), type=String(), comment=String(indexme="yes")) + the comment will then be indexed and be searchable, with the results related back to the issue that the file is linked to - as a result of this work, the FileClass has a default MIME type that may be overridden in a subclass, or by the use of a "type" property as is done in the default templates. - the regeneration of the indexes (if necessary) is done once the schema is set up in the dbinit.
author Richard Jones <richard@users.sourceforge.net>
date Tue, 09 Jul 2002 03:02:53 +0000
parents 254b8d112eec
children 76c6db876c14
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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: blobfiles.py,v 1.6 2002-07-09 03:02:52 richard Exp $
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19 '''
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20 This module exports file storage for roundup backends.
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21 Files are stored into a directory hierarchy.
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22 '''
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23
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24 import os
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25
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26 def files_in_dir(dir):
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27 if not os.path.exists(dir):
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28 return 0
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29 num_files = 0
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30 for dir_entry in os.listdir(dir):
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31 full_filename = os.path.join(dir,dir_entry)
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32 if os.path.isfile(full_filename):
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33 num_files = num_files + 1
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34 elif os.path.isdir(full_filename):
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35 num_files = num_files + files_in_dir(full_filename)
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36 return num_files
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37
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38 class FileStorage:
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39 """Store files in some directory structure"""
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40 # TODO: maybe set "files"
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41 # def __init__(self):
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42 # pass
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43
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44 def filename(self, classname, nodeid, property=None):
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45 '''Determine what the filename for the given node and optionally
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46 property is.
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47 '''
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48 if property:
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49 name = '%s%s.%s'%(classname, nodeid, property)
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50 else:
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51 # roundupdb.FileClass never specified the property name, so don't
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52 # include it
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53 name = '%s%s'%(classname, nodeid)
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54
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55 # have a separate subdir for every thousand messages
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56 subdir = str(int(nodeid) / 1000)
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57 return os.path.join(self.dir, 'files', classname, subdir, name)
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58
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59 def filename_flat(self, classname, nodeid, property=None):
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60 '''Determine what the filename for the given node and optionally
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61 property is.
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62 '''
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63 if property:
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64 return os.path.join(self.dir, 'files', '%s%s.%s'%(classname,
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65 nodeid, property))
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66 else:
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67 # roundupdb.FileClass never specified the property name, so don't
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68 # include it
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69 return os.path.join(self.dir, 'files', '%s%s'%(classname,
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70 nodeid))
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71
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72 def storefile(self, classname, nodeid, property, content):
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73 '''Store the content of the file in the database. The property may be
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74 None, in which case the filename does not indicate which property
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75 is being saved.
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76 '''
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77 # determine the name of the file to write to
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78 name = self.filename(classname, nodeid, property)
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79
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80 # make sure the file storage dir exists
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81 if not os.path.exists(os.path.dirname(name)):
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82 os.makedirs(os.path.dirname(name))
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83
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84 # open the temp file for writing
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85 open(name + '.tmp', 'wb').write(content)
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86
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87 # save off the commit action
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88 self.transactions.append((self._doStoreFile, (classname, nodeid,
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89 property)))
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90
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91 def getfile(self, classname, nodeid, property):
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92 '''Get the content of the file in the database.
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93 '''
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94 filename = self.filename(classname, nodeid, property)
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95 try:
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96 return open(filename, 'rb').read()
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97 except:
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98 # now try the temp pre-commit filename
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99 try:
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100 return open(filename+'.tmp', 'rb').read()
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101 except:
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102 # fallback to flat file storage
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103 filename = self.filename_flat(classname, nodeid, property)
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104 return open(filename, 'rb').read()
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105
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106 def numfiles(self):
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107 '''Get number of files in storage, even across subdirectories.
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108 '''
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109 files_dir = os.path.join(self.dir, 'files')
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110 return files_in_dir(files_dir)
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111
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112 def _doStoreFile(self, classname, nodeid, property, **databases):
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113 '''Store the file as part of a transaction commit.
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114 '''
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115 # determine the name of the file to write to
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116 name = self.filename(classname, nodeid, property)
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117
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118 # the file is currently ".tmp" - move it to its real name to commit
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119 os.rename(name+".tmp", name)
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120
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121 # return the classname, nodeid so we reindex this content
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122 return (classname, nodeid)
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123
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124 def _rollbackStoreFile(self, classname, nodeid, property, **databases):
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125 '''Remove the temp file as a part of a rollback
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126 '''
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127 # determine the name of the file to delete
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128 name = self.filename(classname, nodeid, property)
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129 if os.path.exists(name+".tmp"):
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130 os.remove(name+".tmp")
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131
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132 # $Log: not supported by cvs2svn $
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133 # Revision 1.5 2002/07/08 06:58:15 richard
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134 # cleaned up the indexer code:
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135 # - it splits more words out (much simpler, faster splitter)
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136 # - removed code we'll never use (roundup.roundup_indexer has the full
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137 # implementation, and replaces roundup.indexer)
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138 # - only index text/plain and rfc822/message (ideas for other text formats to
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139 # index are welcome)
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140 # - added simple unit test for indexer. Needs more tests for regression.
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141 #
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142 # Revision 1.4 2002/06/19 03:07:19 richard
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143 # Moved the file storage commit into blobfiles where it belongs.
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144 #
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145 # Revision 1.3 2002/02/27 07:33:34 grubert
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146 # . add, vim line and cvs log key.
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147 #
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148 #
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149 # vim: set filetype=python ts=4 sw=4 et si
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