| 1 | ###########################################################################
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| 2 | #
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| 3 | # ArchivesInfPlugin.pm --
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| 4 | # A component of the Greenstone digital library software
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| 5 | # from the New Zealand Digital Library Project at the
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| 6 | # University of Waikato, New Zealand.
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| 7 | #
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| 8 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 9 | #
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| 10 | # This program is free software; you can redistribute it and/or modify
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| 11 | # it under the terms of the GNU General Public License as published by
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| 12 | # the Free Software Foundation; either version 2 of the License, or
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| 13 | # (at your option) any later version.
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| 14 | #
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| 15 | # This program is distributed in the hope that it will be useful,
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| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | # GNU General Public License for more details.
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| 19 | #
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| 20 | # You should have received a copy of the GNU General Public License
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| 21 | # along with this program; if not, write to the Free Software
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| 22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | #
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| 24 | ###########################################################################
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| 25 |
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| 26 | # plugin which reads through an archives.inf (or GDBM equivalent,
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| 27 | # archiveinf-doc.{ldb,bdb} file (i.e. the file generated in the
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| 28 | # archives directory when an import is done), processing each file it
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| 29 | # finds
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| 30 |
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| 31 | package ArchivesInfPlugin;
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| 32 |
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| 33 | use util;
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| 34 | use PrintInfo;
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| 35 | use plugin;
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| 36 | use arcinfo;
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| 37 | use gsprintf;
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| 38 |
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| 39 | use strict;
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| 40 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 41 |
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| 42 | BEGIN {
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| 43 | @ArchivesInfPlugin::ISA = ('PrintInfo');
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| 44 | }
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| 45 |
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| 46 | my $arguments = [
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| 47 | ];
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| 48 |
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| 49 | my $options = { 'name' => "ArchivesInfPlugin",
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| 50 | 'desc' => "{ArchivesInfPlugin.desc}",
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| 51 | 'abstract' => "no",
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| 52 | 'inherits' => "yes" };
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| 53 |
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| 54 | sub gsprintf
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| 55 | {
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| 56 | return &gsprintf::gsprintf(@_);
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| 57 | }
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| 58 |
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| 59 | sub new {
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| 60 | my ($class) = shift (@_);
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| 61 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 62 | push(@$pluginlist, $class);
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| 63 |
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| 64 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 65 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 66 |
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| 67 | my $self = new PrintInfo($pluginlist, $inputargs, $hashArgOptLists);
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| 68 |
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| 69 | return bless $self, $class;
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| 70 | }
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| 71 |
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| 72 | # called once, at the start of processing
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| 73 | sub init {
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| 74 | my $self = shift (@_);
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| 75 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 76 |
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| 77 | # verbosity is passed through from the processor
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| 78 | $self->{'verbosity'} = $verbosity;
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| 79 |
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| 80 | # as are the outhandle and failhandle
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| 81 | $self->{'outhandle'} = $outhandle if defined $outhandle;
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| 82 | $self->{'failhandle'} = $failhandle;
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| 83 |
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| 84 | }
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| 85 |
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| 86 | sub deinit {
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| 87 | my ($self) = @_;
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| 88 |
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| 89 | my $archive_info = $self->{'archive_info'};
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| 90 |
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| 91 | if (defined $archive_info) {
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| 92 | my $archive_info_filename = $self->{'archive_info_filename'};
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| 93 |
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| 94 | my $file_list = $archive_info->get_file_list();
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| 95 |
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| 96 | foreach my $subfile (@$file_list) {
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| 97 | my $doc_oid = $subfile->[1];
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| 98 |
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| 99 | my $index_status = $archive_info->get_status_info($doc_oid);
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| 100 | #### print STDERR "*** Away to Update $doc_oid $index_status\n";
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| 101 |
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| 102 | if ($index_status eq "D") {
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| 103 | # delete
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| 104 | $archive_info->delete_info($doc_oid);
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| 105 | &GDBMUtils::gdbmDatabaseRemove($archive_info_filename,$doc_oid);
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| 106 | }
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| 107 | elsif ($index_status =~ m/^(I|R)$/) {
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| 108 | # mark as "been indexed"
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| 109 | $archive_info->set_status_info($doc_oid,"B");
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| 110 | }
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| 111 | }
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| 112 |
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| 113 | $archive_info->save_info($archive_info_filename);
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| 114 | }
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| 115 | }
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| 116 |
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| 117 | # called at the beginning of each plugin pass (import has one, buildin has many)
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| 118 | sub begin {
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| 119 | my $self = shift (@_);
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| 120 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
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| 121 |
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| 122 | }
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| 123 |
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| 124 | # called at the end of each plugin pass
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| 125 | sub end {
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| 126 | my ($self) = shift (@_);
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| 127 |
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| 128 | }
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| 129 |
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| 130 | # called if we are doing incremental building
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| 131 | sub set_incremental {
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| 132 | my $self = shift(@_);
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| 133 | my ($incremental) = @_;
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| 134 |
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| 135 | $self->{'incremental'} = $incremental;
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| 136 | }
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| 137 |
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| 138 | # return 1 if this class might recurse using $pluginfo
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| 139 | sub is_recursive {
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| 140 | my $self = shift (@_);
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| 141 |
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| 142 | return 1;
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| 143 | }
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| 144 |
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| 145 |
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| 146 | sub compile_stats {
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| 147 | my $self = shift(@_);
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| 148 | my ($stats) = @_;
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| 149 | }
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| 150 |
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| 151 | # We don't do metadata_read
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| 152 | sub metadata_read {
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| 153 | my $self = shift (@_);
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| 154 | my ($pluginfo, $base_dir, $file, $block_hash, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli) = @_;
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| 155 |
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| 156 | return undef;
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| 157 | }
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| 158 |
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| 159 | # we don't do any file blocking
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| 160 | sub file_block_read {
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| 161 |
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| 162 | my $self = shift (@_);
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| 163 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
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| 164 |
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| 165 | return undef;
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| 166 | }
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| 167 |
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| 168 |
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| 169 | # return number of files processed, undef if can't process
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| 170 | # Note that $base_dir might be "" and that $file might
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| 171 | # include directories
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| 172 | sub read {
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| 173 | my $self = shift (@_);
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| 174 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs,$total_count, $gli) = @_;
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| 175 | my $outhandle = $self->{'outhandle'};
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| 176 |
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| 177 | my $count = 0;
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| 178 |
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| 179 | # see if this has a archives information file within it
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| 180 | ## my $archive_info_filename = &util::filename_cat($base_dir,$file,"archives.inf");
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| 181 | my $db_ext = &util::is_little_endian() ? ".ldb" : ".bdb";
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| 182 | my $doc_db = "archiveinf-doc$db_ext";
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| 183 | my $archive_info_filename = &util::filename_cat($base_dir,$file,$doc_db);
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| 184 |
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| 185 | if (-e $archive_info_filename) {
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| 186 |
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| 187 | # found an archives.inf file
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| 188 | &gsprintf($outhandle, "ArchivesInfPlugin: {common.processing} $archive_info_filename\n") if $self->{'verbosity'} > 1;
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| 189 |
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| 190 | # read in the archives information file
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| 191 | my $archive_info = new arcinfo ();
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| 192 | $self->{'archive_info'} = $archive_info;
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| 193 | $self->{'archive_info_filename'} = $archive_info_filename;
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| 194 |
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| 195 | $archive_info->load_info ($archive_info_filename);
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| 196 |
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| 197 | my $file_list = $archive_info->get_file_list();
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| 198 |
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| 199 | # process each file
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| 200 | foreach my $subfile (@$file_list) {
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| 201 |
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| 202 | last if ($maxdocs != -1 && ($total_count + $count) >= $maxdocs);
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| 203 |
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| 204 | my $tmp = &util::filename_cat ($file, $subfile->[0]);
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| 205 | next if $tmp eq $file;
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| 206 |
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| 207 | my $doc_oid = $subfile->[1];
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| 208 | my $index_status = $archive_info->get_status_info($doc_oid);
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| 209 |
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| 210 | my $curr_mode = $processor->get_mode();
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| 211 | my $new_mode = $curr_mode;
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| 212 |
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| 213 | # Start by assuming we want to process the file...
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| 214 | my $process_file = 1;
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| 215 |
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| 216 | # ...unless the build processor is incremental capable and -incremental was specified, in which case we need to check its index_status flag
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| 217 | if ($processor->is_incremental_capable() && $self->{'incremental'})
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| 218 | {
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| 219 | # Check to see if the file needs indexing
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| 220 | if ($index_status eq "B")
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| 221 | {
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| 222 | # Don't process this file as it has already been indexed
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| 223 | $process_file = 0;
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| 224 | }
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| 225 | elsif ($index_status eq "D") {
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| 226 | # Need to be delete it from the index.
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| 227 | $new_mode = $curr_mode."delete";
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| 228 | $process_file = 1;
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| 229 | }
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| 230 | elsif ($index_status eq "R") {
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| 231 | # Need to be reindexed/replaced
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| 232 | $new_mode = $curr_mode."reindex";
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| 233 |
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| 234 | $process_file = 1;
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| 235 | }
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| 236 | }
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| 237 | # ... or we're being asked to delete it (in which case skip it)
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| 238 | elsif ($index_status eq "D") {
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| 239 | # Non-incremental Delete
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| 240 | # It's already been deleted from the archives directory
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| 241 | # (done during import.pl)
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| 242 | # => All we need to do here is not process it
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| 243 |
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| 244 | $process_file = 0;
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| 245 | }
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| 246 |
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| 247 | if (!$processor->is_incremental_capable() && $self->{'incremental'}) {
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| 248 | # Nag feature
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| 249 | if (!defined $self->{'incremental-warning'}) {
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| 250 | print $outhandle "\n";
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| 251 | print $outhandle "Warning: command-line option '-incremental' used with *non-incremental*\n";
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| 252 | print $outhandle " processor '", ref $processor, "'. Some conflicts may arise.\n";
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| 253 | print $outhandle "\n";
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| 254 | sleep 10;
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| 255 | $self->{'incremental-warning'} = 1;
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| 256 | }
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| 257 | }
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| 258 |
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| 259 |
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| 260 |
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| 261 | if ($process_file) {
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| 262 | # note: metadata is not carried on to the next level
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| 263 |
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| 264 | $processor->set_mode($new_mode) if ($new_mode ne $curr_mode);
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| 265 |
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| 266 | $count += &plugin::read ($pluginfo, $base_dir, $tmp, $block_hash, {}, $processor, $maxdocs, ($total_count+$count), $gli);
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| 267 |
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| 268 | $processor->set_mode($curr_mode) if ($new_mode ne $curr_mode);
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| 269 | }
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| 270 | }
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| 271 |
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| 272 | return $count;
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| 273 | }
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| 274 |
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| 275 | # wasn't an archives directory, someone else will have to process it
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| 276 | return undef;
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| 277 | }
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| 278 |
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| 279 | 1;
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