source: gsdl/trunk/perllib/inexport.pm@ 18469

Last change on this file since 18469 was 18469, checked in by davidb, 14 years ago

Support for reindexing a document added

  • Property svn:executable set to *
File size: 8.2 KB
Line 
1###########################################################################
2#
3# inexport.pm -- useful utilities to support import.pl and export.pl
4# A component of the Greenstone digital library software
5# from the New Zealand Digital Library Project at the
6# University of Waikato, New Zealand.
7#
8# Copyright (C) 1999 New Zealand Digital Library Project
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, write to the Free Software
22# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23#
24###########################################################################
25
26package inexport;
27
28use strict;
29
30use File::Basename;
31
32use util;
33use GDBMUtils;
34
35sub new_vs_old_import_diff
36{
37 my ($archive_info,$block_hash,$importdir) = @_;
38
39 # First convert all files to absolute form
40 # This is to support the situation where the import folder is not
41 # the default
42
43 my $prev_all_files = $archive_info->{'prev_import_filelist'};
44 my $full_prev_all_files = {};
45
46 foreach my $prev_file (keys %$prev_all_files) {
47
48 if (!&util::filename_is_absolute($prev_file)) {
49 my $full_prev_file = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},$prev_file);
50 $full_prev_all_files->{$full_prev_file} = $prev_file;
51 }
52 else {
53 $full_prev_all_files->{$prev_file} = $prev_file;
54 }
55 }
56
57
58 # Figure out which are the new files, existing files and so
59 # by implication the files from the previous import that are not
60 # there any more => mark them for deletion
61 foreach my $curr_file (keys %{$block_hash->{'all_files'}}) {
62
63 my $full_curr_file = $curr_file;
64
65 # entry in 'all_files' is moved to either 'existing_files',
66 # 'deleted_files', or 'new_files'
67
68 if (!&util::filename_is_absolute($curr_file)) {
69 # add in import dir to make absolute
70 $full_curr_file = &util::filename_cat($importdir,$curr_file);
71 }
72
73 if (defined $block_hash->{'file_blocks'}->{$full_curr_file}) {
74 # If in block list, we want to ignore it
75 delete $block_hash->{'all_files'}->{$curr_file};
76
77 if (defined $full_prev_all_files->{$full_curr_file}) {
78 # also make sure it is gone from 'previous' list so
79 # not mistaken for a file that needs to be deleted
80 delete $full_prev_all_files->{$full_curr_file};
81 }
82 next;
83 }
84
85 # figure of if new file or not
86 if (defined $full_prev_all_files->{$full_curr_file}) {
87
88 # had it before
89 $block_hash->{'existing_files'}->{$full_curr_file} = 1;
90
91 # Now remove it, so by end of loop only the files
92 # that need deleting are left
93
94 delete $full_prev_all_files->{$full_curr_file};
95 }
96 else {
97 $block_hash->{'new_files'}->{$full_curr_file} = 1;
98 }
99
100 delete $block_hash->{'all_files'}->{$curr_file};
101 }
102
103 # By this point full_prev_all_files contains the files
104 # mentioned in archiveinf-src.db but are not in the 'import'
105 # folder (or whatever was specified through -importdir ...)
106
107 # This list can contain files that were created in the 'tmp' or
108 # 'cache' areas (such as screen-size and thumbnail images).
109 #
110 # In building the final list of files to delete, we test to see if
111 # it exists on the filesystem and if it does (unusual for a file
112 # that's allegedly deleted!) , supress it from going into the final
113 # list
114
115 my $collectdir = $ENV{'GSDLCOLLECTDIR'};
116
117 my @deleted_files = values %$full_prev_all_files;
118 map { my $curr_file = $_;
119 my $full_curr_file = $curr_file;
120
121 if (!&util::filename_is_absolute($curr_file)) {
122 # add in import dir to make absolute
123
124 $full_curr_file = &util::filename_cat($collectdir,$curr_file);
125 }
126
127
128 if (!-e $full_curr_file) {
129 $block_hash->{'deleted_files'}->{$curr_file} = 1;
130 }
131 } @deleted_files;
132}
133
134sub mark_docs_for_deletion
135{
136 my ($archive_info,$deleted_files_ref,$archivedir,$verbosity) = @_;
137
138 my $db_ext = &util::is_little_endian() ? ".ldb" : ".bdb";
139 my $doc_db = "archiveinf-doc$db_ext";
140 my $src_db = "archiveinf-src$db_ext";
141 my $arcinfo_doc_filename = &util::filename_cat ($archivedir, $doc_db);
142 my $arcinfo_src_filename = &util::filename_cat ($archivedir, $src_db);
143
144
145 # record files marked for deletion in arcinfo
146 foreach my $file (@$deleted_files_ref) {
147 # use 'archiveinf-src' GDBM file to look up all the OIDs
148 # this file is used in (note in most cases, it's just one OID)
149
150 my $src_rec = GDBMUtils::gdbmRecordToHash($arcinfo_src_filename,$file);
151 my $oids = $src_rec->{'oid'};
152 foreach my $oid (@$oids) {
153
154 # Find out if it's an assoc file or main doc
155
156 my $doc_rec = GDBMUtils::gdbmRecordToHash($arcinfo_doc_filename,$oid);
157 if ($doc_rec->{'src-file'}->[0] eq $file) {
158 # It's the main doc
159 # => mark it for deletion
160
161 if ($verbosity>1) {
162 print STDERR "$oid marked to be deleted from index on next buildcol.pl\n";
163 }
164 $archive_info->set_status_info($oid,"D");
165
166 my $val = &GDBMUtils::gdbmDatabaseGet($arcinfo_doc_filename,$oid);
167 my ($index_status) = ($val =~ m/^<index-status>(.*)$/m);
168 if ($index_status ne "D") {
169 $val =~ s/^<index-status>(.*)$/<index-status>D/m;
170 &GDBMUtils::gdbmDatabaseSet($arcinfo_doc_filename,$oid,$val);
171 my $doc_file = $doc_rec->{'doc-file'}->[0];
172
173 my $doc_filename = &util::filename_cat($archivedir,$doc_file);
174
175
176 my ($doc_tailname, $doc_dirname, $suffix)
177 = File::Basename::fileparse($doc_filename, "\\.[^\\.]+\$");
178
179 print STDERR "Removing $doc_dirname\n" if ($verbosity>2);
180
181 &util::rm_r($doc_dirname);
182
183 }
184 }
185 else {
186 # assoc file => mark it for re-indexing (safest thing to do)
187 my $curr_status = $archive_info->get_status_info($oid);
188
189
190 if (defined($curr_status) && (($curr_status ne "D") && ($curr_status ne "R"))) {
191 if ($verbosity > 1) {
192 print STDERR "$oid marked for (potential) reindexing\n";
193 print STDERR " (because associated file $file deleted)\n";
194 }
195 $archive_info->set_status_info($oid,"R");
196
197 my $val = &GDBMUtils::gdbmDatabaseGet($arcinfo_doc_filename,$oid);
198 $val =~ s/^<index-status>(.*)$/<index-status>R/m;
199 &GDBMUtils::gdbmDatabaseSet($arcinfo_doc_filename,$oid,$val);
200 }
201 }
202
203 GDBMUtils::gdbmDatabaseRemove($arcinfo_src_filename,$file);
204 }
205 }
206}
207
208
209
210sub mark_docs_for_reindex
211{
212 my ($archive_info,$existing_files_ref,$archivedir,$verbosity) = @_;
213
214 # Reindexing is accomplished by deleting the previously indexed
215 # version of the document, and then allowing the new version to
216 # be indexed (as would a new document be indexed).
217 #
218 # The first step (marking for deletion) is implemented by this routine.
219 #
220 # By default in Greenstone a new version of an index will hash to
221 # a new unique OID, and the above strategy of reindex=delete+add
222 # works fine. A special case arises when a persistent OID is
223 # allocated to a document (for instance through a metadata field),
224 # and the second step to reindexing (see XXXX) detects this and
225 # deals with it appropriately.
226
227 my $db_ext = &util::is_little_endian() ? ".ldb" : ".bdb";
228 my $doc_db = "archiveinf-doc$db_ext";
229 my $arcinfo_doc_filename = &util::filename_cat ($archivedir, $doc_db);
230
231
232 my $archiveinf_timestamp = -M $arcinfo_doc_filename;
233
234 my $reindex_files_ref = [];
235
236 foreach my $existing_filename (@$existing_files_ref) {
237
238 if (-M $existing_filename < $archiveinf_timestamp) {
239 # file is newer than last build
240
241 my $existing_file = $existing_filename;
242 my $collectdir = &util::filename_cat($ENV{'GSDLCOLLECTDIR'});
243
244 $existing_file =~ s/^$collectdir(\\|\/)?//;
245
246 print STDERR "**** Deleting existing file: $existing_file\n";
247
248 push(@$reindex_files_ref,$existing_file);
249 }
250
251 }
252
253 mark_docs_for_deletion($archive_info,$reindex_files_ref,$archivedir,$verbosity);
254
255 return @$reindex_files_ref;
256}
257
258
259
2601;
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