| 1 | ###########################################################################
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| 2 | #
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| 3 | # GreenstoneXMLPlugout.pm -- the plugout module for Greenstone Archives
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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) 2006 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 | package MySQLPlugout;
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| 27 |
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| 28 | use strict;
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| 29 | no strict 'refs';
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| 30 | no strict 'subs';
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| 31 |
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| 32 | use util;
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| 33 | use FileUtils;
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| 34 | #use BasePlugout;
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| 35 | use GreenstoneXMLPlugout;
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| 36 | use docprint;
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| 37 |
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| 38 | use IPC::Open2;
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| 39 | use POSIX ":sys_wait_h"; # for waitpid, http://perldoc.perl.org/functions/waitpid.html
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| 40 |
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| 41 | # this plugout does not output xml to a file, but outputs rows into a mysql table
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| 42 | sub BEGIN {
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| 43 | @MySQLPlugout::ISA = ('GreenstoneXMLPlugout');
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| 44 | }
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| 45 |
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| 46 |
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| 47 | # TODO: deal with -removeold and everything? Or type out instructions for user
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| 48 |
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| 49 | # TODO Q: what is "group" in GreenstoneXMLPlugout?
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| 50 | # TODO Q: site_name only exists for GS3. What about GS2?
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| 51 |
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| 52 | my $process_mode_list =
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| 53 | [ { 'name' => "meta_only",
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| 54 | 'desc' => "{MySQLPlugout.process_mode.meta_only}" },
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| 55 | { 'name' => "text_only",
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| 56 | 'desc' => "{MySQLPlugout.process_mode.text_only}" },
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| 57 | { 'name' => "all",
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| 58 | 'desc' => "{MySQLPlugout.process_mode.all}" } ];
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| 59 |
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| 60 | my $arguments = [
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| 61 | { 'name' => "process_mode",
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| 62 | 'desc' => "{MySQLPlugout.process_mode}",
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| 63 | 'type' => "enum",
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| 64 | 'list' => $process_mode_list,
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| 65 | 'deft' => "all",
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| 66 | 'reqd' => "no",
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| 67 | 'hiddengli' => "no"} ];
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| 68 |
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| 69 | my $options = { 'name' => "MySQLPlugout",
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| 70 | 'desc' => "{MySQLPlugout.desc}",
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| 71 | 'abstract' => "no",
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| 72 | 'inherits' => "yes",
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| 73 | 'args' => $arguments };
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| 74 |
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| 75 | sub new {
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| 76 | my ($class) = shift (@_);
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| 77 | my ($plugoutlist, $inputargs,$hashArgOptLists) = @_;
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| 78 | push(@$plugoutlist, $class);
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| 79 |
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| 80 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 81 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 82 |
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| 83 | my $self = new GreenstoneXMLPlugout($plugoutlist,$inputargs,$hashArgOptLists);
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| 84 |
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| 85 | if ($self->{'info_only'}) {
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| 86 | # don't worry about any options etc
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| 87 | return bless $self, $class;
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| 88 | }
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| 89 | print STDERR "***** MySQLPlugout process mode = \"", $self->{'process_mode'}, "\"\n";
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| 90 |
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| 91 | return bless $self, $class;
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| 92 | }
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| 93 |
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| 94 | # connect here and ensure all tables and databases exist
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| 95 | sub begin {
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| 96 |
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| 97 | my $self= shift (@_);
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| 98 |
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| 99 | ########### TODO: these should be set from cmdline/GLI options to plugout #########
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| 100 | $self->{'db_driver'} = "mysql";
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| 101 | $self->{'site_name'} = "localsite";
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| 102 | $self->{'client_user'} = "root";
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| 103 | $self->{'client_pwd'} = "6reenstone3";
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| 104 | #$self->{'db_host'} = "127.0.0.1";
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| 105 | #$self->{'db_encoding'} = "utf8";
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| 106 |
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| 107 | ############ LOAD NECESSARY OPTIONS ###########
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| 108 | print STDERR "########## COLLECTION: ". $ENV{'GSDLCOLLECTION'}."\n";
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| 109 | $self->{'collection_name'} = $ENV{'GSDLCOLLECTION'};
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| 110 |
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| 111 | if(!$self->connect_to_db()) {
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| 112 | # This is fatal for the plugout, let's terminate here
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| 113 | # PrintError would already have displayed the warning message on connection fail
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| 114 | die("Could not connect to db. Can't proceed.\n");
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| 115 | }
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| 116 | if(!$self->load_db_and_tables()) {
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| 117 | # This is fatal for the plugout, let's terminate here
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| 118 | # PrintError would already have displayed the warning message on connection fail
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| 119 | die("Could not use db or prepare its tables. Can't proceed.\n");
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| 120 | }
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| 121 |
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| 122 | # prepare the shared/common HANDLES to SQL insert statements that contain placeholders
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| 123 | # and which we will reuse repeatedly when executing the actual insert statements
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| 124 | my $proc_mode = $self->{'process_mode'};
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| 125 | if($proc_mode eq "all" || $proc_mode eq "meta_only" ) {
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| 126 | $self->{'metadata_prepared_insert_statement_handle'} = $self->prepare_insert_metadata_row_stmthandle();
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| 127 | }
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| 128 | if($proc_mode eq "all" || $proc_mode eq "text_only" ) {
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| 129 | $self->{'fulltxt_prepared_insert_statement_handle'} = $self->prepare_insert_fulltxt_row_stmthandle();
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| 130 | }
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| 131 |
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| 132 | # finally, call begin on super
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| 133 | $self->GreenstoneXMLPlugout::begin(@_);
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| 134 | }
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| 135 |
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| 136 | # disconnect from database here, see inexport.pm
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| 137 | sub end
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| 138 | {
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| 139 | my $self = shift(@_);
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| 140 |
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| 141 | # do the superclass stuff
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| 142 | $self->GreenstoneXMLPlugout::end(@_);
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| 143 | $self->disconnect_from_db() || warn("Unable to disconnect from database " . $self->{'site_name'} . "\n");
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| 144 | #my $success = $self->GreenstoneXMLPlugout::end(@_);
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| 145 | #$success = $self->disconnect_from_db() && $success;
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| 146 | #return $success;
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| 147 | }
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| 148 |
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| 149 | # TODO: check arc-inf.db for whether each entry is to be deleted/indexed/reindexed/been indexed
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| 150 | sub saveas {
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| 151 | my $self = shift (@_);
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| 152 | my ($doc_obj, $doc_dir) = @_;
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| 153 |
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| 154 | # pre save out
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| 155 | my ($docxml_outhandler, $output_file) = $self->GreenstoneXMLPlugout::pre_saveas(@_);
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| 156 |
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| 157 |
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| 158 | # saving customisation
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| 159 | $self->{'debug_outhandle'} = $docxml_outhandler if ($self->{'debug'}); # STDOUT if debug
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| 160 |
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| 161 | # write the INVERSE into doc.xml as to what is written to the db
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| 162 | my $proc_mode = $self->{'process_mode'};
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| 163 | my $docxml_output_options = { 'output' => docprint::OUTPUT_NONE };
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| 164 | if($proc_mode eq "meta_only" ) { # since only meta to go into MySQL db, text will go into docxml
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| 165 | $docxml_output_options->{'output'} = docprint::OUTPUT_TEXT_ONLY;
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| 166 | } elsif($proc_mode eq "text_only" ) { # since only full text to go into MySQL db, meta will go into docxml
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| 167 | $docxml_output_options->{'output'} = docprint::OUTPUT_META_ONLY;
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| 168 | }
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| 169 |
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| 170 | # now we've prepared to write out whatever is meant to go into docxml
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| 171 | # and can do actual the steps superclass GreenstoneXMLPlugout carries out to write out docxml
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| 172 | # So: write out the doc xml file for the current document
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| 173 | my $section_text = &docprint::get_section_xml($doc_obj, $docxml_output_options);
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| 174 | print $docxml_outhandler $section_text;
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| 175 |
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| 176 | # We also write out whatever needs to go into the MySQL database
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| 177 | $self->write_meta_and_text($doc_obj);
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| 178 |
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| 179 |
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| 180 | # post save out
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| 181 | $self->GreenstoneXMLPlugout::post_saveas(@_);
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| 182 |
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| 183 | # TODO: close database connection here? Or do something like with groups
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| 184 | # so we don't open and close over and over during a single build?
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| 185 | }
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| 186 |
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| 187 |
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| 188 | # write meta and/or text PER DOC out to DB
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| 189 | sub write_meta_and_text {
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| 190 | my $self = shift (@_);
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| 191 | my ($doc_obj) = @_;
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| 192 | my $root_section = $doc_obj->get_top_section();
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| 193 | my $doc_oid = $doc_obj->get_OID(); # we're processing a single doc at a time, so single OID
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| 194 |
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| 195 | ##binmode($db_handle,":utf8"); ## WRONG FOR DB, NEED TO CREATE IN UTF8 MODE
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| 196 |
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| 197 | # TODO if $self->debug is on
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| 198 |
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| 199 | # Do we want to open and close a connection per doc?
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| 200 | # Would we not rather want to open and close per collection rebuild?
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| 201 |
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| 202 | #$self->create_db_connection();
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| 203 |
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| 204 | # 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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| 205 | my $metadata_table_sth = $self->{'metadata_prepared_insert_statement_handle'};
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| 206 | my $fulltxt_table_sth = $self->{'fulltxt_prepared_insert_statement_handle'};
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| 207 |
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| 208 | $self->recursive_write_meta_and_text($doc_obj, $root_section, $metadata_table_sth, $fulltxt_table_sth);
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| 209 |
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| 210 | #$self->close_db_connection();
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| 211 | }
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| 212 | # Perl: Reading or Writing to Another Program
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| 213 | # https://nnc3.com/mags/Perl3/cookbook/ch16_05.htm
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| 214 | sub recursive_write_meta_and_text {
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| 215 | my $self = shift (@_);
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| 216 | my ($doc_obj, $doc_oid, $section, $metadata_table_sth, $fulltxt_table_sth) = @_;
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| 217 |
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| 218 | # If section=ROOT, write "root" as section name into table
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| 219 | # doc->get_top_section() is the name of the doc root section, which is ""
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| 220 | my $section_name = ($section eq "") ? "root" : $section;
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| 221 |
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| 222 | my $section_ptr = $doc_obj->_lookup_section ($section);
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| 223 | return "" unless defined $section_ptr;
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| 224 |
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| 225 | my $debug_out = $self->{'debug_outhandle'};
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| 226 |
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| 227 | #my $proc_mode = $self->{'process_mode'};
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| 228 | #if($proc_mode eq "all" || $proc_mode eq "meta_only" ) {
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| 229 | if($metadata_table_sth) { # meta insert statement handle will be undef if not writing meta
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| 230 |
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| 231 | foreach my $data (@{$section_ptr->{'metadata'}}) {
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| 232 | my $meta_name = $data->[0];
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| 233 | my $escaped_meta_value = &escape_text($data->[1]);
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| 234 |
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| 235 | # Write out the current section's meta to collection db's METADATA table
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| 236 |
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| 237 | # for each set of values to write to meta table, execute the prepared statement, filling in the values
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| 238 |
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| 239 | if($self->{'debug'}) {
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| 240 | # just print the statement we were going to execute
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| 241 |
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| 242 | print $debug_out $metadata_table_sth->Statement . "($doc_oid, $section_name, $meta_name, $escaped_meta_value)\n";
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| 243 | }
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| 244 | else {
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| 245 |
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| 246 | $metadata_table_sth->execute($doc_oid, $section_name, $meta_name, $escaped_meta_value);
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| 247 | #|| warn ("Unable to write metadata row to db:\n\tOID $doc_oid, section $section_name,\n\tmeta name: $meta_name, val: $escaped_meta_value");
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| 248 | # Execution failure will print out info anyway: since db connection sets PrintError
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| 249 | }
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| 250 | }
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| 251 | }
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| 252 |
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| 253 | #if($proc_mode eq "all" || $proc_mode eq "text_only" ) {
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| 254 | if($fulltxt_table_sth) { # fulltxt insert statement handle will be undef if not writing fulltxt
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| 255 |
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| 256 | if($self->{'debug'}) {
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| 257 | # just print the statement we were going to execute, minus the fulltxt value
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| 258 | my $txt_repr = $section_ptr->{'text'} ? "<TXT>" : "NULL";
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| 259 | print $debug_out $fulltxt_table_sth->Statement . "($doc_oid, $section_name, $txt_repr)\n";
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| 260 | } else {
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| 261 | my $section_text = &escape_text($section_ptr->{'text'});
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| 262 |
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| 263 | # fulltxt column can be SQL NULL. undef value gets written out as NULL:
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| 264 | # https://stackoverflow.com/questions/12708633/which-one-represents-null-undef-or-empty-string
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| 265 |
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| 266 | # Write out the current section's text to collection db's FULLTeXT table
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| 267 | $fulltxt_table_sth->execute($doc_oid, $section_name, $section_text);
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| 268 | #|| warn ("Unable to write fulltxt row to db for row:\n\tOID $doc_oid, section $section_name");
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| 269 | # Execution failure will print out info anyway: since db connection sets PrintError
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| 270 | }
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| 271 | }
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| 272 |
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| 273 | # output all subsections: RECURSIVE CALL
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| 274 | foreach my $subsection (@{$section_ptr->{'subsection_order'}}) {
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| 275 | &recursive_write_meta_and_text($doc_obj, $doc_oid, "$section.$subsection", $metadata_table_sth, $fulltxt_table_sth);
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| 276 | }
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| 277 | }
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| 278 |
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| 279 | #################################
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| 280 |
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| 281 | # Database access related functions
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| 282 | # http://g2pc1.bu.edu/~qzpeng/manual/MySQL%20Commands.htm
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| 283 | # https://www.guru99.com/insert-into.html
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| 284 |
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| 285 | # TODO Q: What on cancelling a build: delete table? But what if it was a rebuild and the rebuild is cancelled (not the original build)?
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| 286 | # Do we create a copy of the orig database as backup, then start populating current db, and if cancelled, delete current db and RENAME backup table to current?
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| 287 | # https://stackoverflow.com/questions/3280006/duplicating-a-mysql-table-indexes-and-data
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| 288 | # BUT what if the table is HUGE? (Think of a collection with millions of docs.) Huge overhead in copying?
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| 289 | # The alternative is we just quit on cancel, but then: cancel could leave the table in a partial committed state, with no way of rolling back.
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| 290 | # Unless they do a full rebuild, which will recreate the table from scratch?
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| 291 | # SOLUTION-> rollback transaction on error, see https://www.effectiveperlprogramming.com/2010/07/set-custom-dbi-error-handlers/
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| 292 |
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| 293 | # I'm using perl's open2 like in Z3950Download, as opposed to open3 like in WgetDownload
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| 294 | # since I'm assuming each insert statement is atomic: it either does the insertion or fails
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| 295 | # and we (may) get some message back. That means we should hopefully be able to terminate
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| 296 | # as well if we get SIGTERM/SIGKILL: we're not blocking, but are responsive after every INSERT stmt.
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| 297 |
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| 298 | # Just runs the command without displaying it
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| 299 | sub run_command_basic
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| 300 | {
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| 301 | my ($self,$strCMD) = @_;
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| 302 |
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| 303 |
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| 304 | my $process_instr = $self->{'MYSQL_IN'};
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| 305 |
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| 306 | print $process_instr "$strCMD\n";
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| 307 | }
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| 308 |
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| 309 | sub run_command
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| 310 | {
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| 311 | my ($self,$strCMD) = @_;
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| 312 |
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| 313 | print STDERR "Running mysql command: $strCMD\n";
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| 314 | $self->run_command_basic($strCMD);
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| 315 |
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| 316 | }
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| 317 |
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| 318 | sub response_line_contains {
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| 319 | my ($self,$expected) = @_;
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| 320 |
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| 321 | my $out = $self->{'MYSQL_OUT'};
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| 322 | my $opening_line = <$out>;
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| 323 | if ($opening_line =~ m/$expected/i) {
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| 324 | return 1;
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| 325 | }
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| 326 | return 0;
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| 327 | }
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| 328 |
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| 329 | sub response_lines_contain {
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| 330 | my ($self,$expected) = @_;
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| 331 |
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| 332 | my $found_expected = 0;
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| 333 | my $out = $self->{'MYSQL_OUT'};
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| 334 | while (my $line = <$out>) {
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| 335 | print STDERR "$line\n";
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| 336 | if($line =~ m/$expected/){
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| 337 | #return 1;
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| 338 | $found_expected = 1; #won't break out of loop: loop will consume all on child out at present
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| 339 | }
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| 340 | }
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| 341 | return $found_expected;
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| 342 | }
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| 343 |
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| 344 | # based on Z3950Download.pm::start_yaz()
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| 345 | # ./PATH/TO/mysql -u root -p
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| 346 | # Returns:
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| 347 | # - 1 if client already quit after pwd fail (so can't send quit message to stopped client)
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| 348 | # - 0 if load_db failed (needs to be quit),
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| 349 | # - 1 if load_db succeeded (mysql client still running)
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| 350 | sub create_db_connection {
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| 351 | my $self = shift (@_);
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| 352 | print STDERR "Opening connection to MySQL db\n";
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| 353 |
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| 354 | my $mysql_client = $self->{'client_path'};
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| 355 | my $client_user = $self->{'client_user'} || "root";
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| 356 |
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| 357 |
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| 358 | my $launch_cmd = "\"./$mysql_client\" -u $client_user -p";
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| 359 | my $childpid = open2(*MYSQL_OUT, *MYSQL_IN, $launch_cmd)
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| 360 | or (print STDERR "Done\n" and die "can't open2 pipe to mysql client: $!");
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| 361 |
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| 362 | $self->{'pid'} = $childpid;
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| 363 | $self->{'MYSQL_OUT'} = *MYSQL_OUT;
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| 364 | $self->{'MYSQL_IN'} = *MYSQL_IN;
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|---|
| 365 |
|
|---|
| 366 | # connect with pwd and load the database for this site
|
|---|
| 367 | #my $conn_open = $self->open_connection();
|
|---|
| 368 | #
|
|---|
| 369 | #if (!$conn_open) {
|
|---|
| 370 | # print STDERR "Cannot connect to mysql db with $launch_cmd\n";
|
|---|
| 371 | # print STDERR "Done\n";
|
|---|
| 372 | # return 0;
|
|---|
| 373 | #}
|
|---|
| 374 |
|
|---|
| 375 | # connect with pwd
|
|---|
| 376 | my $conn_success = $self->send_pwd();
|
|---|
| 377 | if(!$conn_success) {
|
|---|
| 378 | return -1; # if pwd failed, then the program already exited by itself
|
|---|
| 379 | # (so don't send quit command after process terminated)
|
|---|
| 380 | }
|
|---|
| 381 | else {
|
|---|
| 382 | return $self->load_db();
|
|---|
| 383 | }
|
|---|
| 384 |
|
|---|
| 385 | # return $conn_open;
|
|---|
| 386 | return $conn_success; # 1 if client already quit after pwd fail, 0 if load_db failed (needs to be quit), 1 if load_db succeeded (mysql client still running)
|
|---|
| 387 | }
|
|---|
| 388 |
|
|---|
| 389 |
|
|---|
| 390 | # Copied from Z3950Download.pm::quit_yaz()
|
|---|
| 391 | sub close_db_connection {
|
|---|
| 392 | my $self = shift (@_);
|
|---|
| 393 |
|
|---|
| 394 | $self->run_command("quit");
|
|---|
| 395 | close($self->{'MYSQL_IN'}); # close the input to yaz. It also flushes quit command to mysql client
|
|---|
| 396 |
|
|---|
| 397 | # make sure nothing is being output by mysql client
|
|---|
| 398 | # flush the mysql-client process' outputstream, else we'll be stuck in an infinite
|
|---|
| 399 | # loop waiting for the process to quit.
|
|---|
| 400 | my $output = $self->{'MYSQL_OUT'};
|
|---|
| 401 | my $line;
|
|---|
| 402 | while (defined ($line = <$output>)) {
|
|---|
| 403 | if($line !~ m/\w/s) { # print anything other than plain whitespace in case it is important
|
|---|
| 404 | print STDERR "***### $line";
|
|---|
| 405 | }
|
|---|
| 406 | }
|
|---|
| 407 |
|
|---|
| 408 | close($self->{'MYSQL_OUT'});
|
|---|
| 409 |
|
|---|
| 410 | # Is the following necessary? The PerlDoc on open2 (http://perldoc.perl.org/IPC/Open2.html)
|
|---|
| 411 | # says that waitpid must be called to "reap the child process", or otherwise it will hang
|
|---|
| 412 | # around like a zombie process in the background. Adding it here makes the code work as
|
|---|
| 413 | # before, but it is certainly necessary to call waitpid on wget (see WgetDownload.pm).
|
|---|
| 414 | # http://perldoc.perl.org/functions/waitpid.html
|
|---|
| 415 | my $kidpid;
|
|---|
| 416 | do {
|
|---|
| 417 | $kidpid = waitpid($self->{'pid'}, WNOHANG);
|
|---|
| 418 | } while $kidpid > 0; # waiting for pid to become -1
|
|---|
| 419 | }
|
|---|
| 420 |
|
|---|
| 421 | # should be called only once per site
|
|---|
| 422 | sub create_database {
|
|---|
| 423 | my $self = shift (@_);
|
|---|
| 424 | #my $sitename = shift(@_);
|
|---|
| 425 | my $sitename = $self->{'site_name'};
|
|---|
| 426 | my $cmd = "CREATE DATABASE $sitename;";
|
|---|
| 427 | $self->run_command($cmd);
|
|---|
| 428 | }
|
|---|
| 429 |
|
|---|
| 430 |
|
|---|
| 431 | sub send_pwd {
|
|---|
| 432 | my $self = shift (@_);
|
|---|
| 433 |
|
|---|
| 434 | my $client_pwd = $self->{'client_pwd'};
|
|---|
| 435 | my $out = $self->{'MYSQL_OUT'};
|
|---|
| 436 |
|
|---|
| 437 | # if connected, it's prompting for pwd. Write the pwd to the mysql client process:
|
|---|
| 438 | $self->run_command_basic($client_pwd);
|
|---|
| 439 |
|
|---|
| 440 | #my $opening_line = <$out>;
|
|---|
| 441 | #if ($opening_line =~ m/Access denied/i) {
|
|---|
| 442 | #print STDERR "Password not recognised. Got: $opening_line\n";
|
|---|
| 443 | #return 0;
|
|---|
| 444 | #}
|
|---|
| 445 |
|
|---|
| 446 | if($self->response_line_contains("Access denied")) {
|
|---|
| 447 | print STDERR "Password not recognised. Got: Access denied.\n";
|
|---|
| 448 | return 0;
|
|---|
| 449 | }
|
|---|
| 450 |
|
|---|
| 451 | return 1;
|
|---|
| 452 | }
|
|---|
| 453 |
|
|---|
| 454 |
|
|---|
| 455 | sub load_db {
|
|---|
| 456 | my $self = shift (@_);
|
|---|
| 457 |
|
|---|
| 458 | # attempt to load the db
|
|---|
| 459 | # use the database
|
|---|
| 460 | my $db_name = $self->{'site_name'}; # TODO Q: site_name only exists for GS3. What about GS2?
|
|---|
| 461 | $self->run_command("use " . $db_name . ";");
|
|---|
| 462 |
|
|---|
| 463 | my $db_found = 0;
|
|---|
| 464 | my $out = $self->{'MYSQL_OUT'};
|
|---|
| 465 | while (my $line = <$out>) {
|
|---|
| 466 | print STDERR "$line\n";
|
|---|
| 467 | if($line =~ m/Database changed/){
|
|---|
| 468 | # return 1; # TODO Q: consume all output of running command
|
|---|
| 469 | $db_found = 1;
|
|---|
| 470 | }
|
|---|
| 471 | elsif($line =~ m/Unknown database/){
|
|---|
| 472 | $db_found = -1;
|
|---|
| 473 | }
|
|---|
| 474 | }
|
|---|
| 475 |
|
|---|
| 476 | if($db_found == 1) {
|
|---|
| 477 | return $db_found;
|
|---|
| 478 | }
|
|---|
| 479 | elsif ($db_found == -1) { # a db for the current sitename didn't exist, create it
|
|---|
| 480 | $self->create_database();
|
|---|
| 481 |
|
|---|
| 482 | # attempt to load the newly created db
|
|---|
| 483 | if($self->_load_db()) { # recursive call!
|
|---|
| 484 | return 1;
|
|---|
| 485 | }
|
|---|
| 486 |
|
|---|
| 487 |
|
|---|
| 488 | #my $opening_line = <$out>;
|
|---|
| 489 | #if ($opening_line !~ m/Query OK/) {
|
|---|
| 490 | if(!$self->response_line_contains("Query OK")) {
|
|---|
| 491 | print STDERR "Could not create db\n";
|
|---|
| 492 | return 0; # couldn't even create the db
|
|---|
| 493 | } else { # success creating db
|
|---|
| 494 | # so let's create the metadata and fulltxt tables for the current coll while we're at it
|
|---|
| 495 | if($self->create_meta_table()) {
|
|---|
| 496 | return $self->create_fulltxt_table();
|
|---|
| 497 | }
|
|---|
| 498 | }
|
|---|
| 499 | }
|
|---|
| 500 | else { # unknown error trying to load db, bail
|
|---|
| 501 | return 0;
|
|---|
| 502 | }
|
|---|
| 503 | }
|
|---|
| 504 |
|
|---|
| 505 |
|
|---|
| 506 | sub create_meta_table {
|
|---|
| 507 | my $self = shift (@_);
|
|---|
| 508 | my $table_name = $self->{'collection_name'} . "metadata";
|
|---|
| 509 | #my $cmd = "CREATE TABLE $table_name (id VARCHAR(255) NOT NULL UNIQUE, did VARCHAR(63) NOT NULL, sid VARCHAR(63) NOT NULL, metaname VARCHAR(127) NOT NULL, metavalue VARCHAR(1023) NOT NULL, PRIMARY KEY(id));";
|
|---|
| 510 |
|
|---|
| 511 | # If using an auto incremented primary key:
|
|---|
| 512 | my $cmd = "CREATE TABLE $table_name (id INT NOT NULL AUTO_INCREMENT, did VARCHAR(63) NOT NULL, sid VARCHAR(63) NOT NULL, metaname VARCHAR(127) NOT NULL, metavalue VARCHAR(1023) NOT NULL, PRIMARY KEY(id));";
|
|---|
| 513 |
|
|---|
| 514 | $self->run_command($cmd);
|
|---|
| 515 |
|
|---|
| 516 | if(!$self->response_lines_contain("Query OK")) {
|
|---|
| 517 | print STDERR "Could not create metadata table\n";
|
|---|
| 518 | return 0;
|
|---|
| 519 | } else {
|
|---|
| 520 | return 1;
|
|---|
| 521 | }
|
|---|
| 522 | }
|
|---|
| 523 |
|
|---|
| 524 | sub create_fulltxt_table {
|
|---|
| 525 | my $self = shift (@_);
|
|---|
| 526 | my $table_name = $self->{'collection_name'} . "fulltxt";
|
|---|
| 527 | #my $cmd = "CREATE TABLE $table_name (id VARCHAR(255) NOT NULL UNIQUE, did VARCHAR(63) NOT NULL, sid VARCHAR(63) NOT NULL, fulltxt LONGTEXT, PRIMARY KEY(id));";
|
|---|
| 528 |
|
|---|
| 529 | # If using an auto incremented primary key:
|
|---|
| 530 | my $cmd = "CREATE TABLE $table_name (id INT NOT NULL AUTO_INCREMENT, did VARCHAR(63) NOT NULL, sid VARCHAR(63) NOT NULL, fulltxt LONGTEXT, PRIMARY KEY(id));";
|
|---|
| 531 |
|
|---|
| 532 | $self->run_command($cmd);
|
|---|
| 533 |
|
|---|
| 534 | if(!$self->response_lines_contain("Query OK")) {
|
|---|
| 535 | print STDERR "Could not create table\n";
|
|---|
| 536 | return 0;
|
|---|
| 537 | } else {
|
|---|
| 538 | return 1;
|
|---|
| 539 | }
|
|---|
| 540 | }
|
|---|
| 541 |
|
|---|
| 542 | # https://www.guru99.com/insert-into.html
|
|---|
| 543 | # and https://dev.mysql.com/doc/refman/8.0/en/example-auto-increment.html
|
|---|
| 544 | # for inserting multiple rows at once
|
|---|
| 545 | sub get_cmd_insert_new_row_into_meta_table {
|
|---|
| 546 | my $self = shift (@_);
|
|---|
| 547 | my ($did, $sid, $metaname, $metavalue) = @_;
|
|---|
| 548 | my $tablename = $self->{'colname'}."_metadata";
|
|---|
| 549 |
|
|---|
| 550 | my $cmd = "INSERT INTO $tablename (did, sid, metaname, metavalue) VALUES\n";
|
|---|
| 551 | $cmd .= "('$did', '$sid', '$metaname', '$metavalue');\n";
|
|---|
| 552 | return $cmd;
|
|---|
| 553 | }
|
|---|
| 554 |
|
|---|
| 555 | sub get_cmd_insert_new_row_into_txt_table {
|
|---|
| 556 | my $self = shift (@_);
|
|---|
| 557 | my ($did, $sid, $fulltext) = @_;
|
|---|
| 558 | my $tablename = $self->{'colname'}."_fulltxt";
|
|---|
| 559 |
|
|---|
| 560 | my $cmd = "INSERT INTO $tablename (did, sid, fulltxt) VALUES\n";
|
|---|
| 561 | $cmd .= "('$did', '$sid', '$fulltext');\n";
|
|---|
| 562 | return $cmd;
|
|---|
| 563 | }
|
|---|
| 564 |
|
|---|
| 565 | # TODO: later add edit and delete (and nothing for "been indexed" status?)
|
|---|
| 566 |
|
|---|
| 567 | ##################
|
|---|
| 568 |
|
|---|
| 569 | ## UNUSED
|
|---|
| 570 | sub X_open_connection()
|
|---|
| 571 | {
|
|---|
| 572 | my $self = shift (@_);
|
|---|
| 573 | # connect with pwd
|
|---|
| 574 | my $conn_success = $self->send_pwd();
|
|---|
| 575 | if(!$conn_success) {
|
|---|
| 576 | return -1; # if pwd failed, then the program already exists by itself (so don't send quit command after process terminated)
|
|---|
| 577 | }
|
|---|
| 578 |
|
|---|
| 579 | if($conn_success) {
|
|---|
| 580 | return $self->load_db();
|
|---|
| 581 | } else {
|
|---|
| 582 | return $conn_success;
|
|---|
| 583 | }
|
|---|
| 584 | }
|
|---|
| 585 |
|
|---|
| 586 | #################
|
|---|
| 587 | # Database functions that use the perl DBI module (with the DBD driver module for mysql)
|
|---|
| 588 | #################
|
|---|
| 589 |
|
|---|
| 590 | # THE NEW DB FUNCTIONS
|
|---|
| 591 | # NOTE: FULLTEXT is a reserved keyword in (My)SQL. So we can't name a table or any of its columns "fulltext".
|
|---|
| 592 | # https://dev.mysql.com/doc/refman/5.5/en/keywords.html
|
|---|
| 593 |
|
|---|
| 594 | # TODO: Consider AutoCommit status (and Autocommit off allowing commit or rollback for GS coll build cancel) later
|
|---|
| 595 |
|
|---|
| 596 | sub connect_to_db {
|
|---|
| 597 | my $self= shift (@_);
|
|---|
| 598 |
|
|---|
| 599 | my $db_driver = $self->{'db_driver'};
|
|---|
| 600 | my $db_user = $self->{'client_user'} || "root";
|
|---|
| 601 | my $db_pwd = $self->{'client_pwd'};
|
|---|
| 602 | my $db_host = $self->{'db_host'} || "127.0.0.1";
|
|---|
| 603 | my $db_enc = $self->{'db_encoding'} || "utf8";
|
|---|
| 604 |
|
|---|
| 605 | #my $db_name = $self->{'site_name'};
|
|---|
| 606 |
|
|---|
| 607 | # try connecting to the mysql db, if that fails it will die
|
|---|
| 608 | # so don't bother preparing GreenstoneXMLPlugout by calling superclass' begin()
|
|---|
| 609 |
|
|---|
| 610 | # localhost doesn't work for us, but 127.0.0.1 works
|
|---|
| 611 | # https://metacpan.org/pod/DBD::mysql
|
|---|
| 612 | # "The hostname, if not specified or specified as '' or 'localhost', will default to a MySQL server
|
|---|
| 613 | # running on the local machine using the default for the UNIX socket. To connect to a MySQL server
|
|---|
| 614 | # on the local machine via TCP, you must specify the loopback IP address (127.0.0.1) as the host."
|
|---|
| 615 | #my $connect_str = "dbi:$db_driver:database=$db_name;host=$db_host";
|
|---|
| 616 | my $connect_str = "dbi:$db_driver:host=$db_host"; # don't provide db, so we can check the db is there
|
|---|
| 617 | my $dbh = DBI->connect("$connect_str", $db_user, $db_pwd,
|
|---|
| 618 | {
|
|---|
| 619 | ShowErrorStatement => 1, # more informative as DBI will append failed SQL stmt to error message
|
|---|
| 620 | PrintError => 1, # on by default, but being explicit
|
|---|
| 621 | RaiseError => 0, # off by default, but being explicit
|
|---|
| 622 | AutoCommit => 1, # on by default, but being explicit
|
|---|
| 623 | });
|
|---|
| 624 |
|
|---|
| 625 | if(!$dbh) {
|
|---|
| 626 | # NOTE, despite handle dbh being undefined, error code will be in DBI->err
|
|---|
| 627 | return 0;
|
|---|
| 628 | }
|
|---|
| 629 |
|
|---|
| 630 | # set encoding https://metacpan.org/pod/DBD::mysql
|
|---|
| 631 | # https://dev.mysql.com/doc/refman/5.7/en/charset.html
|
|---|
| 632 | # https://dev.mysql.com/doc/refman/5.7/en/charset-conversion.html
|
|---|
| 633 | # Setting the encoding at db server level.
|
|---|
| 634 | # Not sure if this command is mysql specific:
|
|---|
| 635 | my $stmt = "set NAMES '" . $db_enc . "'";
|
|---|
| 636 | $dbh->do($stmt) || warn("Unable to set charset encoding at db server level to: " . $db_enc . "\n");
|
|---|
| 637 |
|
|---|
| 638 | # if we're here, then connection succeeded, store handle
|
|---|
| 639 | $self->{'db_handle'} = $dbh;
|
|---|
| 640 | return 1;
|
|---|
| 641 | }
|
|---|
| 642 |
|
|---|
| 643 | sub load_db_and_tables {
|
|---|
| 644 | my $self= shift (@_);
|
|---|
| 645 | my $db_name = $self->{'site_name'}; # one database per GS3 site
|
|---|
| 646 | my $dbh = $self->{'db_handle'};
|
|---|
| 647 |
|
|---|
| 648 | # perl DBI switch database: https://www.perlmonks.org/?node_id=995434
|
|---|
| 649 | # do() returns undef on error.
|
|---|
| 650 | # connection succeeded, try to load our database. If that didn't work, attempt to create db
|
|---|
| 651 | my $success = $dbh->do("use $db_name");
|
|---|
| 652 |
|
|---|
| 653 | if(!$success && $dbh->err == 1049) { # "Unknown database" error has code 1049 (mysql only?) meaning db doesn't exist yet
|
|---|
| 654 | # attempt to create the db and its tables
|
|---|
| 655 | $self->create_db($db_name) || return 0;
|
|---|
| 656 |
|
|---|
| 657 | # once more attempt to use db, now that it exists
|
|---|
| 658 | $dbh->do("use $db_name") || return 0;
|
|---|
| 659 | #$dbh->do("use localsite") or die "Error (code" . $dbh->err ."): " . $dbh->errstr . "\n";
|
|---|
| 660 |
|
|---|
| 661 | # attempt to create tables in current db
|
|---|
| 662 | $self->create_metadata_table() || return 0;
|
|---|
| 663 | $self->create_fulltext_table() || return 0;
|
|---|
| 664 |
|
|---|
| 665 | $success = 1;
|
|---|
| 666 | }
|
|---|
| 667 | elsif($success) { # database existed and loaded successfully, but
|
|---|
| 668 | # before proceeding check that the current collection's tables exist
|
|---|
| 669 |
|
|---|
| 670 | # attempt to create tables in current db
|
|---|
| 671 | if(!$self->table_exists($self->{'collection_name'} . "metadata")) {
|
|---|
| 672 | $self->create_metadata_table() || return 0;
|
|---|
| 673 | }
|
|---|
| 674 | if(!$self->table_exists($self->{'collection_name'} . "fulltxt")) {
|
|---|
| 675 | $self->create_fulltext_table() || return 0;
|
|---|
| 676 | }
|
|---|
| 677 | }
|
|---|
| 678 |
|
|---|
| 679 | return $success; # could still return 0, if database failed to load with an error code != 1049
|
|---|
| 680 | }
|
|---|
| 681 |
|
|---|
| 682 | # disconnect from db - https://metacpan.org/pod/DBI#disconnect
|
|---|
| 683 | # TODO: make sure to have committed or rolled back before disconnect
|
|---|
| 684 | # and that you've call finish() on statement handles if any fetch remnants remain
|
|---|
| 685 | sub disconnect_from_db {
|
|---|
| 686 | my $self= shift (@_);
|
|---|
| 687 | my $dbh = $self->{'db_handle'};
|
|---|
| 688 |
|
|---|
| 689 | # make sure any active stmt handles are finished
|
|---|
| 690 | # NO: "When all the data has been fetched from a SELECT statement, the driver will automatically call finish for you. So you should not call it explicitly except when you know that you've not fetched all the data from a statement handle and the handle won't be destroyed soon."
|
|---|
| 691 |
|
|---|
| 692 | #$meta_sth = $self->{'metadata_prepared_insert_statement_handle'};
|
|---|
| 693 | #$txt_sth = $self->{'fulltxt_prepared_insert_statement_handle'};
|
|---|
| 694 | #$meta_sth->finish() if($meta_sth);
|
|---|
| 695 | #$txt_sth->finish() if($txt_sth);
|
|---|
| 696 |
|
|---|
| 697 | my $rc = $dbh->disconnect or warn $dbh->errstr; # The handle is of little use after disconnecting. Possibly PrintError already prints a warning and this duplicates it?
|
|---|
| 698 | return $rc;
|
|---|
| 699 | }
|
|---|
| 700 |
|
|---|
| 701 | sub create_db {
|
|---|
| 702 | my $self= shift (@_);
|
|---|
| 703 | my $db_name = $self->{'site_name'};
|
|---|
| 704 | my $dbh = $self->{'db_handle'};
|
|---|
| 705 |
|
|---|
| 706 | # https://stackoverflow.com/questions/5025768/how-can-i-create-a-mysql-database-from-a-perl-script
|
|---|
| 707 | return $dbh->do("create database $db_name"); # do() will return undef on fail, https://metacpan.org/pod/DBI#do
|
|---|
| 708 | }
|
|---|
| 709 |
|
|---|
| 710 | sub create_metadata_table {
|
|---|
| 711 | my $self= shift (@_);
|
|---|
| 712 | my $dbh = $self->{'db_handle'};
|
|---|
| 713 |
|
|---|
| 714 | my $table_name = $self->{'collection_name'} . "metadata";
|
|---|
| 715 |
|
|---|
| 716 | # If using an auto incremented primary key:
|
|---|
| 717 | my $stmt = "CREATE TABLE $table_name (id INT NOT NULL AUTO_INCREMENT, did VARCHAR(63) NOT NULL, sid VARCHAR(63) NOT NULL, metaname VARCHAR(127) NOT NULL, metavalue VARCHAR(1023) NOT NULL, PRIMARY KEY(id));";
|
|---|
| 718 | return $dbh->do($stmt);
|
|---|
| 719 | }
|
|---|
| 720 |
|
|---|
| 721 | # TODO: Investigate: https://dev.mysql.com/doc/search/?d=10&p=1&q=FULLTEXT
|
|---|
| 722 | # 12.9.1 Natural Language Full-Text Searches
|
|---|
| 723 | # to see whether we have to index the 'fulltxt' column of the 'fulltext' tables
|
|---|
| 724 | # or let user edit this file, or add it as another option
|
|---|
| 725 | sub create_fulltext_table {
|
|---|
| 726 | my $self= shift (@_);
|
|---|
| 727 | my $dbh = $self->{'db_handle'};
|
|---|
| 728 |
|
|---|
| 729 | my $table_name = $self->{'collection_name'} . "fulltxt";
|
|---|
| 730 |
|
|---|
| 731 | # If using an auto incremented primary key:
|
|---|
| 732 | my $stmt = "CREATE TABLE $table_name (id INT NOT NULL AUTO_INCREMENT, did VARCHAR(63) NOT NULL, sid VARCHAR(63) NOT NULL, fulltxt LONGTEXT, PRIMARY KEY(id));";
|
|---|
| 733 | return $dbh->do($stmt);
|
|---|
| 734 |
|
|---|
| 735 | }
|
|---|
| 736 |
|
|---|
| 737 |
|
|---|
| 738 | # USEFUL: https://metacpan.org/pod/DBI
|
|---|
| 739 | # "Many methods have an optional \%attr parameter which can be used to pass information to the driver implementing the method. Except where specifically documented, the \%attr parameter can only be used to pass driver specific hints. In general, you can ignore \%attr parameters or pass it as undef."
|
|---|
| 740 |
|
|---|
| 741 |
|
|---|
| 742 | # https://www.guru99.com/insert-into.html
|
|---|
| 743 | # and https://dev.mysql.com/doc/refman/8.0/en/example-auto-increment.html
|
|---|
| 744 | # for inserting multiple rows at once
|
|---|
| 745 | # https://www.perlmonks.org/bare/?node_id=316183
|
|---|
| 746 | # https://metacpan.org/pod/DBI#do
|
|---|
| 747 | # https://www.quora.com/What-is-the-difference-between-prepare-and-do-statements-in-Perl-while-we-make-a-connection-to-the-database-for-executing-the-query
|
|---|
| 748 | # https://docstore.mik.ua/orelly/linux/dbi/ch05_05.htm
|
|---|
| 749 |
|
|---|
| 750 | # https://metacpan.org/pod/DBI#performance
|
|---|
| 751 | # 'The q{...} style quoting used in this example avoids clashing with quotes that may be used in the SQL statement. Use the double-quote like qq{...} operator if you want to interpolate variables into the string. See "Quote and Quote-like Operators" in perlop for more details.'
|
|---|
| 752 | sub prepare_insert_metadata_row_stmthandle {
|
|---|
| 753 | my $self = shift (@_);
|
|---|
| 754 | my ($did, $sid, $metaname, $metavalue) = @_;
|
|---|
| 755 | my $dbh = $self->{'db_handle'};
|
|---|
| 756 |
|
|---|
| 757 | my $tablename = $self->{'colname'}."_metadata";
|
|---|
| 758 |
|
|---|
| 759 | #my $stmt = "INSERT INTO $tablename (did, sid, metaname, metavalue) VALUES ('$did', '$sid', '$metaname', '$metavalue');"; # ?, ?, ?, ?
|
|---|
| 760 |
|
|---|
| 761 | # using qq{} since we want $tablename placeholder to be filled in
|
|---|
| 762 | # returns Statement Handle object!
|
|---|
| 763 | my $sth = $dbh->prepare(qq{INSERT INTO $tablename (did, sid, metaname, metavalue) VALUES (?, ?, ?, ?)"}) || warn("Could not prepare insert statement for metadata table\n");
|
|---|
| 764 |
|
|---|
| 765 | return $sth;
|
|---|
| 766 | }
|
|---|
| 767 |
|
|---|
| 768 | sub prepare_insert_fulltxt_row_stmthandle {
|
|---|
| 769 | my $self = shift (@_);
|
|---|
| 770 | my ($did, $sid, $fulltext) = @_;
|
|---|
| 771 | my $dbh = $self->{'db_handle'};
|
|---|
| 772 |
|
|---|
| 773 | my $tablename = $self->{'colname'}."_fulltxt";
|
|---|
| 774 |
|
|---|
| 775 | #my $stmt = "INSERT INTO $tablename (did, sid, fulltxt) VALUES ('$did', '$sid', '$fulltext');"; ?, ?, ?
|
|---|
| 776 |
|
|---|
| 777 | # using qq{} since we want $tablename placeholder to be filled in
|
|---|
| 778 | # returns Statement Handle object!
|
|---|
| 779 | my $sth = $dbh->prepare(qq{INSERT INTO $tablename (did, sid, fulltxt) VALUES (?, ?, ?)"}) || warn("Could not prepare insert statement for fulltxt table\n");
|
|---|
| 780 |
|
|---|
| 781 | return $sth;
|
|---|
| 782 | }
|
|---|
| 783 |
|
|---|
| 784 | # I can get my version of table_exists to work, but it's not so ideal
|
|---|
| 785 | # Interesting that MySQL has non-standard command to CREATE TABLE IF NOT EXISTS and DROP TABLE IF EXISTS,
|
|---|
| 786 | # see https://www.perlmonks.org/bare/?node=DBI%20Recipes
|
|---|
| 787 | # The page further has a table_exists function that could work with proper comparison
|
|---|
| 788 | # Couldn't get the first solution at https://www.perlmonks.org/bare/?node_id=500050 to work though
|
|---|
| 789 | sub table_exists {
|
|---|
| 790 | my ($dbh,$table_name) = @_;
|
|---|
| 791 |
|
|---|
| 792 | my @table_list = $dbh->tables;
|
|---|
| 793 | #my $tables_str = @table_list[0];
|
|---|
| 794 | foreach my $table (@table_list) {
|
|---|
| 795 | return 1 if ($table =~ m/$table_name/);
|
|---|
| 796 | }
|
|---|
| 797 | return 0;
|
|---|
| 798 | }
|
|---|
| 799 |
|
|---|
| 800 | 1;
|
|---|
