[32518] | 1 | ###########################################################################
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| 2 | #
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[32527] | 3 | # GreenstoneSQLPlugout.pm -- plugout module for writing all or some the
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| 4 | # Greenstone document format (metadata and/or fulltext) into a (My)SQL db.
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[32526] | 5 | # The rest is then still written out by GreenstoneXMLPlugout as usual.
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[32518] | 6 | # A component of the Greenstone digital library software
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| 7 | # from the New Zealand Digital Library Project at the
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| 8 | # University of Waikato, New Zealand.
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| 9 | #
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| 10 | # Copyright (C) 2006 New Zealand Digital Library Project
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| 11 | #
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| 12 | # This program is free software; you can redistribute it and/or modify
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| 13 | # it under the terms of the GNU General Public License as published by
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| 14 | # the Free Software Foundation; either version 2 of the License, or
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| 15 | # (at your option) any later version.
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| 16 | #
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| 17 | # This program is distributed in the hope that it will be useful,
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| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | # GNU General Public License for more details.
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| 21 | #
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| 22 | # You should have received a copy of the GNU General Public License
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| 23 | # along with this program; if not, write to the Free Software
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| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | #
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| 26 | ###########################################################################
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| 27 |
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[32527] | 28 | package GreenstoneSQLPlugout;
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[32518] | 29 |
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| 30 | use strict;
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| 31 | no strict 'refs';
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| 32 | no strict 'subs';
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| 33 |
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[32520] | 34 | use GreenstoneXMLPlugout;
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[32518] | 35 | use docprint;
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[32529] | 36 | use gssql;
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[32518] | 37 |
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[32524] | 38 | use DBI; # the central package for this plugout
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| 39 |
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[32518] | 40 |
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[32521] | 41 | # TODO: SIGTERM rollback and disconnect?
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[32536] | 42 | # TODO Q: what about verbosity for debugging
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[32541] | 43 | # TODO Q: introduced site_name param to plugins and plugouts. Did I do it right? And should they have hiddengli = "yes"
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[32521] | 44 |
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[32518] | 45 | # this plugout does not output xml to a file, but outputs rows into a mysql table
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| 46 | sub BEGIN {
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[32527] | 47 | @GreenstoneSQLPlugout::ISA = ('GreenstoneXMLPlugout');
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[32518] | 48 | }
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| 49 |
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[32529] | 50 | # NOTTODO: die() statements need to be replaced with premature_termination
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| 51 | # which should ensure the GreenstoneXMLPlugin (group)'s stuff is closed and cleaned up SOMEHOW
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| 52 | # It's fine: the die() stmts all take place before setting up the super class' begin
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[32520] | 53 |
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| 54 | # TODO: deal with -removeold and everything? Or type out instructions for user
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| 55 |
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[32518] | 56 | # TODO Q: what is "group" in GreenstoneXMLPlugout?
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[32520] | 57 | # TODO Q: site_name only exists for GS3. What about GS2?
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[32518] | 58 |
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| 59 | my $process_mode_list =
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| 60 | [ { 'name' => "meta_only",
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[32537] | 61 | 'desc' => "{GreenstoneSQLPlug.process_mode.meta_only}" },
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[32518] | 62 | { 'name' => "text_only",
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[32537] | 63 | 'desc' => "{GreenstoneSQLPlug.process_mode.text_only}" },
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[32518] | 64 | { 'name' => "all",
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[32537] | 65 | 'desc' => "{GreenstoneSQLPlug.process_mode.all}" } ];
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[32518] | 66 |
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[32541] | 67 | # The following are the saveas.options:
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[32518] | 68 | my $arguments = [
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[32541] | 69 | { 'name' => "process_mode",
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| 70 | 'desc' => "{GreenstoneSQLPlug.process_mode}",
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| 71 | 'type' => "enum",
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| 72 | 'list' => $process_mode_list,
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| 73 | 'deft' => "all",
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| 74 | 'reqd' => "no",
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| 75 | 'hiddengli' => "no"},
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| 76 | { 'name' => "db_driver",
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| 77 | 'desc' => "{GreenstoneSQLPlug.db_driver}",
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| 78 | 'type' => "string",
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| 79 | 'deft' => "mysql",
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| 80 | 'reqd' => "yes"},
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| 81 | { 'name' => "db_client_user",
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| 82 | 'desc' => "{GreenstoneSQLPlug.db_client_user}",
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| 83 | 'type' => "string",
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| 84 | 'deft' => "root",
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| 85 | 'reqd' => "yes"},
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| 86 | { 'name' => "db_client_pwd",
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| 87 | 'desc' => "{GreenstoneSQLPlug.db_client_pwd}",
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| 88 | 'type' => "string",
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| 89 | 'deft' => "",
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| 90 | 'reqd' => "yes"}, # pwd required?
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| 91 | { 'name' => "db_host",
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| 92 | 'desc' => "{GreenstoneSQLPlug.db_host}",
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| 93 | 'type' => "string",
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| 94 | 'deft' => "127.0.0.1",
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| 95 | 'reqd' => "yes"},
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| 96 | { 'name' => "db_encoding",
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| 97 | 'desc' => "{GreenstoneSQLPlug.db_encoding}",
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| 98 | 'type' => "string",
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| 99 | 'deft' => "utf8",
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| 100 | 'reqd' => "yes"}
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| 101 | ];
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[32518] | 102 |
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[32527] | 103 | my $options = { 'name' => "GreenstoneSQLPlugout",
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| 104 | 'desc' => "{GreenstoneSQLPlugout.desc}",
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[32518] | 105 | 'abstract' => "no",
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| 106 | 'inherits' => "yes",
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| 107 | 'args' => $arguments };
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| 108 |
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| 109 | sub new {
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| 110 | my ($class) = shift (@_);
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| 111 | my ($plugoutlist, $inputargs,$hashArgOptLists) = @_;
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| 112 | push(@$plugoutlist, $class);
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| 113 |
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| 114 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 115 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 116 |
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| 117 | my $self = new GreenstoneXMLPlugout($plugoutlist,$inputargs,$hashArgOptLists);
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| 118 |
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| 119 | if ($self->{'info_only'}) {
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| 120 | # don't worry about any options etc
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| 121 | return bless $self, $class;
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| 122 | }
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[32527] | 123 | print STDERR "***** GreenstoneSQLPlugout process mode = \"", $self->{'process_mode'}, "\"\n";
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[32518] | 124 |
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| 125 | return bless $self, $class;
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| 126 | }
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| 127 |
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[32520] | 128 | # connect here and ensure all tables and databases exist
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| 129 | sub begin {
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| 130 |
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| 131 | my $self= shift (@_);
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| 132 |
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[32541] | 133 | # The saveas.options
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| 134 | #print STDERR "@@@@ PLUGOUT db_pwd: " . $self->{'db_client_pwd'} . "\n";
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| 135 | #print STDERR "@@@@ user: " . $self->{'db_client_user'} . "\n";
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| 136 | #print STDERR "@@@@ db_host: " . $self->{'db_host'} . "\n";
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| 137 | #print STDERR "@@@@ db_enc: " . $self->{'db_encoding'} . "\n";
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| 138 | #print STDERR "@@@@ db_driver: " . $self->{'db_driver'} . "\n";
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| 139 | #print STDERR "@@@@ proc_mode: " . $self->{'process_mode'} . "\n";
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| 140 |
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[32520] | 141 | ########### TODO: these should be set from cmdline/GLI options to plugout #########
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[32541] | 142 |
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[32524] | 143 | $self->{'build_mode'} = "removeold";
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[32541] | 144 |
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[32520] | 145 | ############ LOAD NECESSARY OPTIONS ###########
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[32541] | 146 | #print "@@@ plugout SITE NAME: ". $self->{'site_name'} . "\n" if defined $self->{'site_name'};
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| 147 | #print STDERR "########## COLLECTION: ". $ENV{'GSDLCOLLECTION'}."\n";
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| 148 |
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[32527] | 149 | print STDERR "***** GreenstoneSQLPlugout process mode = \"", $self->{'process_mode'}, "\"\n";
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[32529] | 150 |
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| 151 | my $db_params = {
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[32530] | 152 | 'collection_name' => $ENV{'GSDLCOLLECTION'},
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[32529] | 153 | 'db_encoding' => $self->{'db_encoding'}
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| 154 | };
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| 155 |
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| 156 | my $gs_sql = new gssql($db_params);
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[32520] | 157 |
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[32530] | 158 | # try connecting to the mysql db, if that fails it will die
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| 159 | # so don't bother preparing GreenstoneXMLPlugout by calling superclass' begin()
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| 160 | if(!$gs_sql->connect_to_db({
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| 161 | 'db_driver' => $self->{'db_driver'},
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| 162 | 'db_client_user' => $self->{'db_client_user'},
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| 163 | 'db_client_pwd' => $self->{'db_client_pwd'},
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| 164 | 'db_host' => $self->{'db_host'}
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| 165 | })
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| 166 | )
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| 167 | {
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[32520] | 168 | # This is fatal for the plugout, let's terminate here
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| 169 | # PrintError would already have displayed the warning message on connection fail
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| 170 | die("Could not connect to db. Can't proceed.\n");
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| 171 | }
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[32524] | 172 |
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[32541] | 173 | my $db_name = $self->{'site_name'} || "greenstone2"; # one database per GS3 site, for GS2 the db is called greenstone2
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[32524] | 174 | my $build_mode = $self->{'build_mode'} || "removeold";
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[32529] | 175 | if(!$gs_sql->load_db_and_tables($db_name, $build_mode)) {
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[32524] | 176 |
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[32536] | 177 | # This is fatal for the plugout, let's terminate here after disconnecting again
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| 178 | # PrintError would already have displayed the warning message on load fail
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| 179 | $gs_sql->disconnect_from_db()
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[32541] | 180 | || warn("Unable to disconnect from database.\n");
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[32536] | 181 | die("Could not use db $db_name and/or prepare its tables. Can't proceed.\n");
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[32520] | 182 | }
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| 183 |
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| 184 | # prepare the shared/common HANDLES to SQL insert statements that contain placeholders
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[32521] | 185 | # and which we will reuse repeatedly when actually executing the insert statements
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[32520] | 186 | my $proc_mode = $self->{'process_mode'};
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| 187 | if($proc_mode eq "all" || $proc_mode eq "meta_only" ) {
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[32529] | 188 | $self->{'metadata_prepared_insert_statement_handle'} = $gs_sql->prepare_insert_metadata_row_stmthandle();
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[32520] | 189 | }
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| 190 | if($proc_mode eq "all" || $proc_mode eq "text_only" ) {
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[32529] | 191 | $self->{'fulltxt_prepared_insert_statement_handle'} = $gs_sql->prepare_insert_fulltxt_row_stmthandle();
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[32520] | 192 | }
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[32521] | 193 |
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[32529] | 194 | # store the DBI wrapper instance
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| 195 | $self->{'gs_sql'} = $gs_sql;
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| 196 |
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[32524] | 197 | print STDERR "#### Meta stmt: " . $self->{'metadata_prepared_insert_statement_handle'}->{'Statement'} . "\n";
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| 198 | print STDERR "#### Full stmt: " . $self->{'fulltxt_prepared_insert_statement_handle'}->{'Statement'} . "\n";
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| 199 |
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[32521] | 200 | # if setting up to work with sql db failed, we'd have terminated and wouldn't come up to here:
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| 201 | # won't bother preparing GreenstoneXMLPlugout by calling superclass' begin()
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| 202 | # finally, can call begin on super - important as doc.xml is opened as a group etc
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[32523] | 203 |
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[32526] | 204 | $self->SUPER::begin(@_);
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[32520] | 205 | }
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| 206 |
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| 207 | # disconnect from database here, see inexport.pm
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| 208 | sub end
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| 209 | {
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| 210 | my $self = shift(@_);
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| 211 |
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[32521] | 212 | # do the superclass stuff first, as any sql db failures should not prevent superclass cleanup
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[32526] | 213 | $self->SUPER::end(@_);
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[32521] | 214 |
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[32529] | 215 | $self->{'gs_sql'}->disconnect_from_db() || warn("Unable to disconnect from database " . $self->{'site_name'} . "\n"); # disconnect_from_db() will also issue a warning, but this may be clearer
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[32520] | 216 | }
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[32533] | 217 |
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[32536] | 218 | # produce files called docsql-<OID>.xml instead of doc.xml
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| 219 | sub get_doc_xml_filename {
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[32533] | 220 | my $self = shift (@_);
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[32536] | 221 | my ($doc_obj) = @_;
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| 222 |
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| 223 | my $doc_id = $doc_obj->get_OID();
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| 224 | my $filename = $doc_id ? "docsql-".$doc_id.".xml" : "docsql.xml";
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| 225 | return $filename;
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[32533] | 226 | }
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[32521] | 227 |
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[32518] | 228 | # TODO: check arc-inf.db for whether each entry is to be deleted/indexed/reindexed/been indexed
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| 229 | sub saveas {
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| 230 | my $self = shift (@_);
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| 231 | my ($doc_obj, $doc_dir) = @_;
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| 232 |
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[32536] | 233 | # print STDERR "\n\n@@@ In saveas\n\n";
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[32524] | 234 |
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[32522] | 235 | my $proc_mode = $self->{'process_mode'};
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| 236 |
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[32521] | 237 | # 1. pre save out and saving debug handle
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| 238 |
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[32523] | 239 | # must call superclass (pre/post) saveas methods, as they handle assoc_files too
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[32526] | 240 | my ($docxml_outhandler, $output_file) = $self->SUPER::pre_saveas(@_);
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[32523] | 241 |
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| 242 | $self->{'debug_outhandle'} = $docxml_outhandler if ($self->{'debug'}); # STDOUT if debug
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| 243 |
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| 244 | # TODO: also set debugging in begin()? Then stmts creating db and tables also sent to debug out and not executed
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| 245 |
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| 246 | # TODO: remove unused old_unused_saveas from GreenstoneXMLPlugout
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[32520] | 247 |
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[32521] | 248 |
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| 249 | # 2. overriding saving behaviour to do what the superclass does PLUS saving to sql db
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[32518] | 250 |
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[32523] | 251 | #NOTE: if proc_mode == all, then "breadcrumbs" go into both meta and txt elements of doc.xml:
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| 252 | # statements pointing viewer to the sql db for contents
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[32522] | 253 |
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[32523] | 254 | # write the INVERSE into doc.xml as to what is written to the db
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| 255 | my $docxml_output_options = { 'output' => docprint::OUTPUT_NONE };
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| 256 | if($proc_mode eq "meta_only" ) { # since only meta to go into MySQL db, text will go into docxml
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| 257 | $docxml_output_options->{'output'} = docprint::OUTPUT_TEXT_ONLY;
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| 258 | } elsif($proc_mode eq "text_only" ) { # since only full text to go into MySQL db, meta will go into docxml
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| 259 | $docxml_output_options->{'output'} = docprint::OUTPUT_META_ONLY;
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[32518] | 260 | }
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[32521] | 261 |
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[32523] | 262 | # now we've prepared to write out whatever is meant to go into docxml
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| 263 | # and can do actual the steps superclass GreenstoneXMLPlugout carries out to write out docxml
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| 264 | # So: write out the doc xml file for the current document
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| 265 | my $section_text = &docprint::get_section_xml($doc_obj, $docxml_output_options);
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| 266 | print $docxml_outhandler $section_text;
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| 267 |
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| 268 |
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[32518] | 269 | # We also write out whatever needs to go into the MySQL database
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| 270 | $self->write_meta_and_text($doc_obj);
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| 271 |
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[32520] | 272 |
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[32521] | 273 | # 3. post save out
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[32526] | 274 | #$self->SUPER::post_saveas(@_);
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| 275 | $self->SUPER::post_saveas($doc_obj, $doc_dir, $docxml_outhandler, $output_file);
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[32521] | 276 |
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[32523] | 277 |
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[32521] | 278 | # database connection is closed in end() method
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| 279 | # so we don't open and close over and over for each doc during a single build
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[32518] | 280 | }
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| 281 |
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| 282 |
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[32520] | 283 | # write meta and/or text PER DOC out to DB
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[32518] | 284 | sub write_meta_and_text {
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| 285 | my $self = shift (@_);
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| 286 | my ($doc_obj) = @_;
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[32531] | 287 | my $doc_oid = $doc_obj->get_OID(); # this method processes a single doc at a time, so it uses the same OID throughout
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[32518] | 288 | my $root_section = $doc_obj->get_top_section();
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| 289 |
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[32520] | 290 | # load the prepared INSERT statement handles for both tables (can be undef for any table depending on whether meta_only or txt_only are set)
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| 291 | my $metadata_table_sth = $self->{'metadata_prepared_insert_statement_handle'};
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| 292 | my $fulltxt_table_sth = $self->{'fulltxt_prepared_insert_statement_handle'};
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[32518] | 293 |
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[32524] | 294 | $self->recursive_write_meta_and_text($doc_obj, $doc_oid, $root_section, $metadata_table_sth, $fulltxt_table_sth);
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[32521] | 295 | }
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[32518] | 296 |
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| 297 | # Perl: Reading or Writing to Another Program
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| 298 | # https://nnc3.com/mags/Perl3/cookbook/ch16_05.htm
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| 299 | sub recursive_write_meta_and_text {
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[32520] | 300 | my $self = shift (@_);
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| 301 | my ($doc_obj, $doc_oid, $section, $metadata_table_sth, $fulltxt_table_sth) = @_;
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| 302 |
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| 303 | # If section=ROOT, write "root" as section name into table
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| 304 | # doc->get_top_section() is the name of the doc root section, which is ""
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| 305 | my $section_name = ($section eq "") ? "root" : $section;
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[32518] | 306 |
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| 307 | my $section_ptr = $doc_obj->_lookup_section ($section);
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| 308 | return "" unless defined $section_ptr;
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| 309 |
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[32520] | 310 | my $debug_out = $self->{'debug_outhandle'};
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[32531] | 311 | # print STDERR "#### Meta stmt: " . $metadata_table_sth->{'Statement'} . "\n";
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| 312 | # print STDERR "#### Full stmt: " . $fulltxt_table_sth->{'Statement'} . "\n";
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[32520] | 313 |
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| 314 | #my $proc_mode = $self->{'process_mode'};
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| 315 | #if($proc_mode eq "all" || $proc_mode eq "meta_only" ) {
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| 316 | if($metadata_table_sth) { # meta insert statement handle will be undef if not writing meta
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| 317 |
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| 318 | foreach my $data (@{$section_ptr->{'metadata'}}) {
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| 319 | my $meta_name = $data->[0];
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[32536] | 320 | # TODO: does it need to be stored escaped, as it requires unescaping when read back in
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| 321 | # from db (unlike for reading back in from doc.xml)
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[32524] | 322 | my $escaped_meta_value = &docprint::escape_text($data->[1]);
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[32518] | 323 |
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[32520] | 324 | # Write out the current section's meta to collection db's METADATA table
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| 325 |
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| 326 | # for each set of values to write to meta table, execute the prepared statement, filling in the values
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| 327 |
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| 328 | if($self->{'debug'}) {
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| 329 | # just print the statement we were going to execute
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| 330 |
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[32524] | 331 | print $debug_out $metadata_table_sth->{'Statement'} . "($doc_oid, $section_name, $meta_name, $escaped_meta_value)\n";
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[32520] | 332 | }
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| 333 | else {
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[32533] | 334 |
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| 335 | $metadata_table_sth->execute($doc_oid, $section_name, $meta_name, $escaped_meta_value)
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| 336 | || warn ("Unable to write metadata row to db:\n\tOID $doc_oid, section $section_name,\n\tmeta name: $meta_name, val: $escaped_meta_value");
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[32520] | 337 | # Execution failure will print out info anyway: since db connection sets PrintError
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| 338 | }
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[32518] | 339 | }
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| 340 | }
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[32520] | 341 |
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| 342 | #if($proc_mode eq "all" || $proc_mode eq "text_only" ) {
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| 343 | if($fulltxt_table_sth) { # fulltxt insert statement handle will be undef if not writing fulltxt
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| 344 |
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| 345 | if($self->{'debug'}) {
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| 346 | # just print the statement we were going to execute, minus the fulltxt value
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| 347 | my $txt_repr = $section_ptr->{'text'} ? "<TXT>" : "NULL";
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[32524] | 348 | print $debug_out $fulltxt_table_sth->{'Statement'} . "($doc_oid, $section_name, $txt_repr)\n";
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[32520] | 349 | } else {
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[32524] | 350 | my $section_text = &docprint::escape_text($section_ptr->{'text'});
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[32520] | 351 |
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| 352 | # fulltxt column can be SQL NULL. undef value gets written out as NULL:
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| 353 | # https://stackoverflow.com/questions/12708633/which-one-represents-null-undef-or-empty-string
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| 354 |
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| 355 | # Write out the current section's text to collection db's FULLTeXT table
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[32533] | 356 | $fulltxt_table_sth->execute($doc_oid, $section_name, $section_text)
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| 357 | || warn ("Unable to write fulltxt row to db for row:\n\tOID $doc_oid, section $section_name");
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[32520] | 358 | # Execution failure will print out info anyway: since db connection sets PrintError
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| 359 | }
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[32518] | 360 | }
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| 361 |
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| 362 | # output all subsections: RECURSIVE CALL
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| 363 | foreach my $subsection (@{$section_ptr->{'subsection_order'}}) {
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[32531] | 364 | $self->recursive_write_meta_and_text($doc_obj, $doc_oid, "$section.$subsection", $metadata_table_sth, $fulltxt_table_sth);
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[32518] | 365 | }
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| 366 | }
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| 367 |
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| 368 |
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| 369 | 1;
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