| 1 | ###########################################################################
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| 2 | #
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| 3 | # GreenstoneSQLPlugin.pm -- reads into doc_obj from SQL db and docsql-<OID>.xml
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| 4 | # Metadata and/or fulltext are stored in SQL db, the rest may be stored in
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| 5 | # the docsql .xml files.
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| 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) 2001 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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| 28 | package GreenstoneSQLPlugin;
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| 29 |
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| 30 |
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| 31 | use strict;
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| 32 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 33 |
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| 34 | use DBI;
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| 35 | use docprint; # for new unescape_text() subroutine
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| 36 | use GreenstoneXMLPlugin;
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| 37 | use gssql;
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| 38 |
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| 39 |
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| 40 | # TODO:
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| 41 | # - Run TODOs here and in plugout by Dr Bainbridge. Ask about docsql naming convention adopted
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| 42 | # to identify OID. Better way?
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| 43 | # collection names -> table names: hyphens not allowed? Changed to underscores.
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| 44 | # - Startup parameters
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| 45 | # - incremental building: where do we need to add code to delete rows from our sql table after
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| 46 | # incrementally importing a coll with fewer docs (for instance)? What about deleted/modified meta?
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| 47 | # - Courier documents in lucene-sql collection: character (degree symbol) not preserved. Is this because we encode in utf8 when putting into db and reading back in?
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| 48 | # - Have not yet tested writing out just meta or just fulltxt to sql db and reading just that
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| 49 | # back in from the sql db while the remainder is to be read back in from the docsql .xml files.
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| 50 |
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| 51 |
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| 52 | # GreenstoneSQLPlugin inherits from GreenstoneXMLPlugin so that it if meta or fulltext
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| 53 | # is still written out to doc.xml (docsql .xml), that will be processed as usual,
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| 54 | # whereas GreenstoneSQLPlugin will process all the rest (full text and/or meta, whichever
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| 55 | # is written out by GreenstoneSQLPlugout into the SQL db).
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| 56 |
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| 57 |
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| 58 | sub BEGIN {
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| 59 | @GreenstoneSQLPlugin::ISA = ('GreenstoneXMLPlugin');
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| 60 | }
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| 61 |
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| 62 | # This plugin must be in the document plugins pipeline IN PLACE OF GreenstoneXMLPlugin
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| 63 | # So we won't have a process exp conflict here.
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| 64 | sub get_default_process_exp {
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| 65 | my $self = shift (@_);
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| 66 |
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| 67 | #return q^(?i)docsql(-\d+)?\.xml$^;
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| 68 | return q^(?i)docsql(-.+)?\.xml$^;
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| 69 | }
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| 70 |
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| 71 | my $process_mode_list =
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| 72 | [ { 'name' => "meta_only",
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| 73 | 'desc' => "{GreenstoneSQLPlugout.process_mode.meta_only}" },
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| 74 | { 'name' => "text_only",
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| 75 | 'desc' => "{GreenstoneSQLPlugout.process_mode.text_only}" },
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| 76 | { 'name' => "all",
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| 77 | 'desc' => "{GreenstoneSQLPlugout.process_mode.all}" } ];
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| 78 |
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| 79 | my $arguments =
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| 80 | [ { 'name' => "process_exp",
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| 81 | 'desc' => "{BaseImporter.process_exp}",
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| 82 | 'type' => "regexp",
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| 83 | 'deft' => &get_default_process_exp(),
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| 84 | 'reqd' => "no" },
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| 85 | { 'name' => "process_mode",
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| 86 | 'desc' => "{GreenstoneSQLPlugout.process_mode}",
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| 87 | 'type' => "enum",
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| 88 | 'list' => $process_mode_list,
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| 89 | 'deft' => "all",
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| 90 | 'reqd' => "no"}
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| 91 | ];
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| 92 |
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| 93 | my $options = { 'name' => "GreenstoneSQLPlugin",
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| 94 | 'desc' => "{GreenstoneSQLPlugin.desc}",
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| 95 | 'abstract' => "no",
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| 96 | 'inherits' => "yes",
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| 97 | 'args' => $arguments };
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| 98 |
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| 99 |
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| 100 | # TODO: For on cancel, add a SIGTERM handler or so to call end()
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| 101 | # or to explicitly call gs_sql->close_connection if $gs_sql def
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| 102 |
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| 103 | sub new {
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| 104 | my ($class) = shift (@_);
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| 105 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 106 | push(@$pluginlist, $class);
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| 107 |
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| 108 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 109 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 110 |
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| 111 | my $self = new GreenstoneXMLPlugin($pluginlist, $inputargs, $hashArgOptLists);
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| 112 |
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| 113 |
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| 114 | #return bless $self, $class;
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| 115 | $self = bless $self, $class;
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| 116 | if ($self->{'info_only'}) {
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| 117 | # If running pluginfo, we don't need to go further.
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| 118 | return $self;
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| 119 | }
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| 120 |
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| 121 | # do anything else that needs to be done here when not pluginfo
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| 122 |
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| 123 | return $self;
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| 124 | }
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| 125 |
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| 126 | # need to store current section
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| 127 | #sub xml_start_tag {
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| 128 | # my $self = shift(@_);
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| 129 | # $self->SUPER::xml_start_tag(@_);
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| 130 | # $self->{'stored_section'} = $self->{'section'};
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| 131 | # $self->{'stored_section_level'} = $self->{'section_level'}
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| 132 | #}
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| 133 |
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| 134 | # TODO Q: Why are there 3 passes when we're only indexing at doc and section level (2 passes)?
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| 135 |
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| 136 | # At the end of superclass GreenstoneXMLPlugin.pm's close_document() method,
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| 137 | # the doc_obj in memory is processed (indexed) and then made undef.
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| 138 | # So we have to work with doc_obj before superclass close_document() is finished.
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| 139 | sub close_document {
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| 140 | my $self = shift(@_);
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| 141 |
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| 142 | my $outhandle = $self->{'outhandle'};
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| 143 | my $doc_obj = $self->{'doc_obj'};
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| 144 | my $gs_sql = $self->{'gs_sql'};
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| 145 |
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| 146 | my $oid = $self->{'doc_oid'}; # we stored current doc's OID during sub read()
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| 147 | print $outhandle "@@@@@@ OID of document (meta|text) to be read in from DB: $oid\n"
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| 148 | if $self->{'verbosity'} > 1;
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| 149 |
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| 150 | # print STDERR "@@@@ section: |" . $self->{'stored_section'} . "|\n";
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| 151 | # print STDERR "@@@@ section_level: " . $self->{'stored_section_level'} . "\n";
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| 152 |
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| 153 | # for now, we have access to doc_obj (until just before super::close_document() terminates)
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| 154 | #$self->{'doc_obj'}->set_OID($oid);
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| 155 |
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| 156 | # TODO: This function is called on a per doc.xml file basis
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| 157 | # but we can process all docs of a collection in one go when dealing with the SQL tables for
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| 158 | # the collection. How and where should we read in the collection tables then?
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| 159 | # TODO: Perhaps MySQLPlugout could write out a token file (.gssql) into archives during import.pl
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| 160 | # and if that file is detected, then MySQLPlugin::read() is passed in that file during
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| 161 | # buildcol.pl. And that file will trigger reading the 2 tables for the collection???
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| 162 | my $proc_mode = $self->{'process_mode'};
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| 163 | if($proc_mode eq "all" || $proc_mode eq "meta_only") {
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| 164 | # read in meta for the collection (i.e. select * from <col>_metadata table
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| 165 |
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| 166 | my $meta_table = $gs_sql->get_metadata_table_name();
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| 167 |
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| 168 | # https://www.effectiveperlprogramming.com/2010/07/set-custom-dbi-error-handlers/
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| 169 | my $sth = $gs_sql->get_db_handle()->prepare(qq{SELECT * FROM $meta_table WHERE did = ?});
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| 170 | print $outhandle "### stmt: ".$sth->{'Statement'}."\n"
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| 171 | if $self->{'verbosity'} > 1;
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| 172 | $sth->execute( $oid ); # will print msg on fail
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| 173 |
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| 174 | print $outhandle "----------SQL DB contains meta-----------\n" if $self->{'verbosity'} > 1;
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| 175 | while( my @row = $sth->fetchrow_array() ) {
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| 176 | #print $outhandle "row: @row\n";
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| 177 | my ($primary_key, $did, $sid, $metaname, $metaval) = @row;
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| 178 |
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| 179 | # get rid of the artificial "root" introduced in section id when saving to sql db
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| 180 | $sid =~ s@^root@@;
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| 181 | $sid = $doc_obj->get_top_section() unless $sid;
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| 182 | print $outhandle "### did: $did, sid: |$sid|, meta: $metaname, val: $metaval\n"
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| 183 | if $self->{'verbosity'} > 1;
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| 184 |
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| 185 | # TODO: we accessed the db in utf8 mode, so, we can call doc_obj->add_utf8_meta directly:
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| 186 | $doc_obj->add_utf8_metadata($sid, $metaname, &docprint::unescape_text($metaval));
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| 187 | }
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| 188 | print $outhandle "----------FIN READING DOC's META FROM SQL DB------------\n"
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| 189 | if $self->{'verbosity'} > 1;
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| 190 | }
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| 191 |
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| 192 | if($proc_mode eq "all" || $proc_mode eq "text_only") {
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| 193 | # read in fulltxt for the collection (i.e. select * from <col>_fulltxt table
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| 194 |
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| 195 | my $fulltxt_table = $gs_sql->get_fulltext_table_name();
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| 196 |
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| 197 |
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| 198 | my $sth = $gs_sql->get_db_handle()->prepare(qq{SELECT * FROM $fulltxt_table WHERE did = ?});
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| 199 | print $outhandle "### stmt: ".$sth->{'Statement'}."\n"
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| 200 | if $self->{'verbosity'} > 1;
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| 201 | $sth->execute( $oid ); # will print msg on fail
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| 202 |
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| 203 | print $outhandle "----------\nSQL DB contains txt entries for-----------\n"
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| 204 | if $self->{'verbosity'} > 1;
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| 205 | while( my ($primary_key, $did, $sid, $text) = $sth->fetchrow_array() ) {
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| 206 |
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| 207 | # get rid of the artificial "root" introduced in section id when saving to sql db
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| 208 | #$sid =~ s@^root@@;
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| 209 | $sid = $doc_obj->get_top_section() if ($sid eq "root");
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| 210 | print $outhandle "### did: $did, sid: |$sid|, fulltext: <TXT NOT PRINTED>\n"
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| 211 | if $self->{'verbosity'} > 1;
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| 212 |
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| 213 | # TODO - pass by ref?
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| 214 | # TODO: we accessed the db in utf8 mode, so, we can call doc_obj->add_utf8_text directly:
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| 215 | $doc_obj->add_utf8_text($sid, &docprint::unescape_text($text));
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| 216 | }
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| 217 | print $outhandle "----------FIN READING DOC's TXT FROM SQL DB------------\n"
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| 218 | if $self->{'verbosity'} > 1;
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| 219 | }
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| 220 |
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| 221 |
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| 222 | # don't forget to clean up on close() in superclass
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| 223 | # It will get the doc_obj indexed then make it undef
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| 224 | $self->SUPER::close_document(@_);
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| 225 | }
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| 226 |
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| 227 |
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| 228 | # TODO: only want to work with sql db if buildcol.pl
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| 229 | # call init() not begin() because there can be multiple plugin passes
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| 230 | # and init() should be called before all passes:
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| 231 | # one for doc level and another for section level indexing
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| 232 | sub init {
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| 233 | my ($self) = shift (@_);
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| 234 | # print STDERR "@@@@@@@@@@ INIT CALLED\n";
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| 235 |
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| 236 | $self->SUPER::init(@_); # super (GreenstoneXMLPlugin) will not yet be trying to read from doc.xml (docsql .xml) files in init().
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| 237 |
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| 238 | # TODO: how do we know what site we're dealing with unless this is passed in, by buildcol?
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| 239 | ###########
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| 240 | # print "@@@ SITE NAME: ". $self->{'site_name'} . "\n" if defined $self->{'site_name'};
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| 241 | # print "@@@ COLL NAME: ". $ENV{'GSDLCOLLECTION'} . "\n";
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| 242 |
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| 243 | $self->{'db_driver'} = "mysql";
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| 244 | $self->{'site_name'} = "localsite";
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| 245 | $self->{'db_client_user'} = "root";
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| 246 | $self->{'db_client_pwd'} = "6reenstone3";
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| 247 | $self->{'build_mode'} = "removeold";
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| 248 | $self->{'db_host'} = "127.0.0.1";
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| 249 | $self->{'db_encoding'} = "utf8";
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| 250 | ###########
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| 251 |
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| 252 | my $gs_sql = new gssql({
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| 253 | 'collection_name' => $ENV{'GSDLCOLLECTION'},
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| 254 | 'db_encoding' => $self->{'db_encoding'}
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| 255 | #'db_name' => $self->{'site_name'},
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| 256 | #'build_mode' => $self->{'build_mode'},
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| 257 | }
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| 258 | );
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| 259 |
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| 260 | # try connecting to the mysql db, if that fails it will die
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| 261 | if(!$gs_sql->connect_to_db({
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| 262 | 'db_driver' => $self->{'db_driver'},
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| 263 | 'db_client_user' => $self->{'db_client_user'},
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| 264 | 'db_client_pwd' => $self->{'db_client_pwd'},
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| 265 | 'db_host' => $self->{'db_host'}
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| 266 | })
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| 267 | )
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| 268 | {
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| 269 | # This is fatal for the plugout, let's terminate here
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| 270 | # PrintError would already have displayed the warning message on connection fail
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| 271 | die("Could not connect to db. Can't proceed.\n");
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| 272 | }
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| 273 |
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| 274 | my $db_name = $self->{'site_name'} || "localsite"; # one database per GS3 site
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| 275 | #my $build_mode = $self->{'build_mode'} || "removeold";
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| 276 |
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| 277 | # the db and its tables should exist. Attempt to use the db:
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| 278 | if(!$gs_sql->use_db($db_name)) {
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| 279 |
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| 280 | # This is fatal for the plugout, let's terminate here after disconnecting again
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| 281 | # PrintError would already have displayed the warning message on load fail
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| 282 | $gs_sql->disconnect_from_db()
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| 283 | || warn("Unable to disconnect from database " . $self->{'site_name'} . "\n");
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| 284 | die("Could not use db $db_name. Can't proceed.\n");
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| 285 | }
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| 286 |
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| 287 | # store db handle now that we're connected
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| 288 | $self->{'gs_sql'} = $gs_sql;
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| 289 |
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| 290 | }
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| 291 |
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| 292 |
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| 293 | # Call deinit() not end() because there can be multiple plugin passes:
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| 294 | # one for doc level and another for section level indexing
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| 295 | # and deinit() should be called before all passes
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| 296 | sub deinit {
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| 297 | my ($self) = shift (@_);
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| 298 | if($self->{'gs_sql'}) { # can cover TODO: only want to work with sql db if buildcol.pl
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| 299 | $self->{'gs_sql'}->disconnect_from_db()
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| 300 | || warn("Unable to disconnect from database " . $self->{'site_name'} . "\n");
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| 301 | }
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| 302 | # print STDERR "@@@@@@@@@@ DEINIT CALLED\n";
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| 303 | $self->SUPER::deinit(@_);
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| 304 | }
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| 305 |
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| 306 | sub read {
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| 307 | my $self = shift (@_);
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| 308 |
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| 309 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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| 310 |
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| 311 | # when running buildcol.pl, the filename should match "docsql-<OID>.xml"
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| 312 | # when running import.pl it will be the original document's filename
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| 313 | # we only want to read in from db when running buildcol.pl
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| 314 |
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| 315 | # doc_obj doesn't exist yet and only exists during super::read(): a new doc (doc_obj)
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| 316 | # is created in super::open_document() and is made undef again on super::close_document().
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| 317 | # Further, can't read it in from doc.xml to work out which OID to query in sql db:
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| 318 | # even if we got access to doc_obj, if no meta stored in docsql.xml, then when
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| 319 | # doc_obj is read in from docsql.xml there will be no OID. So OID is docsql.xml filename
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| 320 | # contains OID in filename. Having extracted OID from the filename, store OID in plugin-self
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| 321 | if($file =~ m/docsql-(.+?)\.xml$/) {
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| 322 |
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| 323 | # work out docoid from filename of form "docsql-<OID>.xml". $file can have a containing
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| 324 | # subfolder besides filename, e.g. "dir/docsql-<OID>.xml"
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| 325 |
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| 326 | # https://stackoverflow.com/questions/22836/how-do-i-perform-a-perl-substitution-on-a-string-while-keeping-the-original
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| 327 | (my $oid = $file) =~ s@^(.*?)docsql-(.+?)\.xml$@$2@;
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| 328 |
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| 329 | $self->{'doc_oid'} = $oid;
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| 330 | }
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| 331 |
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| 332 |
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| 333 | # always read docsql.xml, as we then know doc structure, and assoc files are dealt with
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| 334 | # Plus we need to read docsql.xml if either meta or fulltxt went into there instead of to sql db
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| 335 | return $self->SUPER::read(@_); # will open_doc, close_doc then process doc_obj for indexing, then undef doc_obj
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| 336 |
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| 337 |
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| 338 | }
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