Mercurial > p > roundup > code
annotate roundup/backends/blobfiles.py @ 1244:8dd4f736370b
merge from maintenance branch
| author | Richard Jones <richard@users.sourceforge.net> |
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| date | Thu, 03 Oct 2002 06:56:30 +0000 |
| parents | 32e41ddf2edb |
| children | c538a64b94a7 |
| rev | line source |
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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 # |
| 1088 | 18 #$Id: blobfiles.py,v 1.9 2002-09-10 00:11:50 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 def filename(self, classname, nodeid, property=None): |
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41 '''Determine what the filename for the given node and optionally |
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42 property is. |
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43 ''' |
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44 if property: |
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45 name = '%s%s.%s'%(classname, nodeid, property) |
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46 else: |
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47 # roundupdb.FileClass never specified the property name, so don't |
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48 # include it |
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49 name = '%s%s'%(classname, nodeid) |
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50 |
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51 # have a separate subdir for every thousand messages |
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52 subdir = str(int(nodeid) / 1000) |
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53 return os.path.join(self.dir, 'files', classname, subdir, name) |
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54 |
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55 def filename_flat(self, classname, nodeid, property=None): |
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56 '''Determine what the filename for the given node and optionally |
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57 property is. |
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58 ''' |
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59 if property: |
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60 return os.path.join(self.dir, 'files', '%s%s.%s'%(classname, |
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61 nodeid, property)) |
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62 else: |
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63 # roundupdb.FileClass never specified the property name, so don't |
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64 # include it |
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65 return os.path.join(self.dir, 'files', '%s%s'%(classname, |
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66 nodeid)) |
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67 |
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68 def storefile(self, classname, nodeid, property, content): |
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69 '''Store the content of the file in the database. The property may be |
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70 None, in which case the filename does not indicate which property |
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71 is being saved. |
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72 ''' |
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73 # determine the name of the file to write to |
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74 name = self.filename(classname, nodeid, property) |
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75 |
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76 # make sure the file storage dir exists |
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77 if not os.path.exists(os.path.dirname(name)): |
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78 os.makedirs(os.path.dirname(name)) |
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79 |
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80 # open the temp file for writing |
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81 open(name + '.tmp', 'wb').write(content) |
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82 |
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83 # save off the commit action |
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84 self.transactions.append((self.doStoreFile, (classname, nodeid, |
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85 property))) |
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86 |
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87 def getfile(self, classname, nodeid, property): |
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88 '''Get the content of the file in the database. |
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89 ''' |
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90 filename = self.filename(classname, nodeid, property) |
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91 try: |
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92 return open(filename, 'rb').read() |
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93 except: |
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94 # now try the temp pre-commit filename |
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95 try: |
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96 return open(filename+'.tmp', 'rb').read() |
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97 except: |
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98 # fallback to flat file storage |
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99 filename = self.filename_flat(classname, nodeid, property) |
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100 return open(filename, 'rb').read() |
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101 |
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102 def numfiles(self): |
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103 '''Get number of files in storage, even across subdirectories. |
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104 ''' |
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105 files_dir = os.path.join(self.dir, 'files') |
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106 return files_in_dir(files_dir) |
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107 |
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108 def doStoreFile(self, classname, nodeid, property, **databases): |
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109 '''Store the file as part of a transaction commit. |
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110 ''' |
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111 # determine the name of the file to write to |
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112 name = self.filename(classname, nodeid, property) |
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113 |
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114 # the file is currently ".tmp" - move it to its real name to commit |
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115 os.rename(name+".tmp", name) |
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116 |
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117 # return the classname, nodeid so we reindex this content |
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118 return (classname, nodeid) |
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119 |
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120 def rollbackStoreFile(self, classname, nodeid, property, **databases): |
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121 '''Remove the temp file as a part of a rollback |
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122 ''' |
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123 # determine the name of the file to delete |
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124 name = self.filename(classname, nodeid, property) |
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125 if os.path.exists(name+".tmp"): |
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126 os.remove(name+".tmp") |
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127 |
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128 # vim: set filetype=python ts=4 sw=4 et si |
