[32536] | 1 | ###########################################################################
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| 2 | #
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[32542] | 3 | # GreenstoneSQLPlugin.pm -- reads into doc_obj from SQL db and docsql.xml
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[32536] | 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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[32592] | 37 | use gsmysql;
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[32536] | 38 |
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| 39 |
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| 40 |
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[32555] | 41 | ########################################################################################
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| 42 |
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[32595] | 43 | # GreenstoneSQLPlugin inherits from GreenstoneXMLPlugin so that if meta or fulltext
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[32536] | 44 | # is still written out to doc.xml (docsql .xml), that will be processed as usual,
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| 45 | # whereas GreenstoneSQLPlugin will process all the rest (full text and/or meta, whichever
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| 46 | # is written out by GreenstoneSQLPlugout into the SQL db).
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| 47 |
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| 48 |
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| 49 | sub BEGIN {
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| 50 | @GreenstoneSQLPlugin::ISA = ('GreenstoneXMLPlugin');
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| 51 | }
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| 52 |
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| 53 | # This plugin must be in the document plugins pipeline IN PLACE OF GreenstoneXMLPlugin
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| 54 | # So we won't have a process exp conflict here.
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[32542] | 55 | # The structure of docsql.xml files is identical to doc.xml and the contents are similar except:
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| 56 | # - since metadata and/or fulltxt are stored in mysql db instead, just XML comments indicating
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| 57 | # this are left inside docsql.xml within the <Description> (for meta) and/or <Content> (for txt)
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| 58 | # - the root element Archive now has a docoid attribute: <Archive docoid="OID">
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[32536] | 59 | sub get_default_process_exp {
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| 60 | my $self = shift (@_);
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| 61 |
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[32542] | 62 | return q^(?i)docsql(-\d+)?\.xml$^; # regex based on this method in GreenstoneXMLPlugin
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[32536] | 63 | }
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| 64 |
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| 65 | my $process_mode_list =
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| 66 | [ { 'name' => "meta_only",
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[32537] | 67 | 'desc' => "{GreenstoneSQLPlug.process_mode.meta_only}" },
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[32536] | 68 | { 'name' => "text_only",
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[32537] | 69 | 'desc' => "{GreenstoneSQLPlug.process_mode.text_only}" },
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[32536] | 70 | { 'name' => "all",
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[32537] | 71 | 'desc' => "{GreenstoneSQLPlug.process_mode.all}" } ];
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[32536] | 72 |
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[32582] | 73 | my $rollback_on_cancel_list =
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| 74 | [ { 'name' => "true",
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| 75 | 'desc' => "{GreenstoneSQLPlug.rollback_on_cancel}" },
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| 76 | { 'name' => "false",
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| 77 | 'desc' => "{GreenstoneSQLPlug.rollbacl_on_cancel}" } ];
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| 78 |
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[32595] | 79 | # NOTE: If subclassing gsmysql for other supporting databases and if they have different required
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[32591] | 80 | # connection parameters, we can check how WordPlugin, upon detecting Word is installed,
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| 81 | # dynamically loads Word specific configuration options.
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[32536] | 82 | my $arguments =
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| 83 | [ { 'name' => "process_exp",
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| 84 | 'desc' => "{BaseImporter.process_exp}",
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| 85 | 'type' => "regexp",
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| 86 | 'deft' => &get_default_process_exp(),
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| 87 | 'reqd' => "no" },
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[32541] | 88 | { 'name' => "process_mode",
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| 89 | 'desc' => "{GreenstoneSQLPlug.process_mode}",
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| 90 | 'type' => "enum",
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| 91 | 'list' => $process_mode_list,
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| 92 | 'deft' => "all",
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| 93 | 'reqd' => "no"},
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[32582] | 94 | { 'name' => "rollback_on_cancel",
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| 95 | 'desc' => "{GreenstoneSQLPlug.rollback_on_cancel}",
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| 96 | 'type' => "enum",
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| 97 | 'list' => $rollback_on_cancel_list,
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[32591] | 98 | 'deft' => "false", # better default than true
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[32582] | 99 | 'reqd' => "no",
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| 100 | 'hiddengli' => "no"},
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[32541] | 101 | { 'name' => "db_driver",
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| 102 | 'desc' => "{GreenstoneSQLPlug.db_driver}",
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| 103 | 'type' => "string",
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| 104 | 'deft' => "mysql",
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| 105 | 'reqd' => "yes"},
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| 106 | { 'name' => "db_client_user",
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| 107 | 'desc' => "{GreenstoneSQLPlug.db_client_user}",
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| 108 | 'type' => "string",
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| 109 | 'deft' => "root",
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| 110 | 'reqd' => "yes"},
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| 111 | { 'name' => "db_client_pwd",
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| 112 | 'desc' => "{GreenstoneSQLPlug.db_client_pwd}",
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| 113 | 'type' => "string",
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| 114 | 'deft' => "",
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[32591] | 115 | 'reqd' => "no"}, # pwd not required: can create mysql accounts without pwd
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[32541] | 116 | { 'name' => "db_host",
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| 117 | 'desc' => "{GreenstoneSQLPlug.db_host}",
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| 118 | 'type' => "string",
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[32591] | 119 | 'deft' => "127.0.0.1", # NOTE: make this int? No default for port, since it's not a required connection param
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[32541] | 120 | 'reqd' => "yes"},
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[32589] | 121 | { 'name' => "db_port",
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| 122 | 'desc' => "{GreenstoneSQLPlug.db_port}",
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| 123 | 'type' => "string", # NOTE: make this int? No default for port, since it's not a required connection param
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| 124 | 'reqd' => "no"}
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[32536] | 125 | ];
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| 126 |
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| 127 | my $options = { 'name' => "GreenstoneSQLPlugin",
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| 128 | 'desc' => "{GreenstoneSQLPlugin.desc}",
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| 129 | 'abstract' => "no",
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| 130 | 'inherits' => "yes",
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| 131 | 'args' => $arguments };
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| 132 |
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| 133 |
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[32583] | 134 | ###### Methods called during buildcol and import #######
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[32536] | 135 |
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| 136 | sub new {
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| 137 | my ($class) = shift (@_);
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| 138 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 139 | push(@$pluginlist, $class);
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| 140 |
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| 141 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 142 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 143 |
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| 144 | my $self = new GreenstoneXMLPlugin($pluginlist, $inputargs, $hashArgOptLists);
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| 145 |
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| 146 |
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| 147 | #return bless $self, $class;
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| 148 | $self = bless $self, $class;
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| 149 | if ($self->{'info_only'}) {
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| 150 | # If running pluginfo, we don't need to go further.
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| 151 | return $self;
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| 152 | }
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| 153 |
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| 154 | # do anything else that needs to be done here when not pluginfo
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| 155 |
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| 156 | return $self;
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| 157 | }
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| 158 |
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[32583] | 159 | # Call init() not begin() because there can be multiple plugin passes and begin() called for
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| 160 | # each pass (one for doc level and another for section level indexing), whereas init() should
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| 161 | # be called before any and all passes.
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| 162 | # This way, we can connect to the SQL database once per buildcol run.
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[32595] | 163 | # Although now it doesn't matter, since gsmysql.pm uses the get_instance pattern to return a
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| 164 | # singleton db connection, regardless of the number of gsmysql objects instantiated and
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| 165 | # the number of connect() calls made on them.
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[32583] | 166 | sub init {
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| 167 | my ($self) = shift (@_);
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| 168 |
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| 169 | $self->SUPER::init(@_); # super (GreenstoneXMLPlugin) will not yet be trying to read from doc.xml (docsql .xml) files in init().
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| 170 |
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| 171 |
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[32592] | 172 | # create gsmysql object.
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[32583] | 173 | # collection name will be used for naming tables (site name will be used for naming database)
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[32592] | 174 | my $gs_sql = new gsmysql({
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[32583] | 175 | 'collection_name' => $ENV{'GSDLCOLLECTION'},
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| 176 | 'verbosity' => $self->{'verbosity'} || 0
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| 177 | });
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| 178 |
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| 179 | # if autocommit is set, there's no rollback support
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| 180 | my $autocommit = ($self->{'rollback_on_cancel'} eq "false") ? 1 : 0;
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| 181 |
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| 182 | # try connecting to the mysql db, die if that fails
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| 183 | if(!$gs_sql->connect_to_db({
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| 184 | 'db_driver' => $self->{'db_driver'},
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| 185 | 'db_client_user' => $self->{'db_client_user'},
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| 186 | 'db_client_pwd' => $self->{'db_client_pwd'},
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| 187 | 'db_host' => $self->{'db_host'},
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[32589] | 188 | 'db_port' => $self->{'db_port'}, # undef by default, can leave as is
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[32583] | 189 | 'autocommit' => $autocommit
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| 190 | })
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| 191 | )
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| 192 | {
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| 193 | # This is fatal for the plugout, let's terminate here
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| 194 | # PrintError would already have displayed the warning message on connection fail
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| 195 | die("Could not connect to db. Can't proceed.\n");
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| 196 | }
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| 197 |
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[32586] | 198 | my $db_name = $self->{'site'} || "greenstone2"; # one database per GS3 site, for GS2 the db is called greenstone2
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[32583] | 199 |
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| 200 | # Attempt to use the db, create it if it doesn't exist (but don't create the tables yet)
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| 201 | # Bail if we can't use the database
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| 202 | if(!$gs_sql->use_db($db_name)) {
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| 203 |
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| 204 | # This is fatal for the plugout, let's terminate here after disconnecting again
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| 205 | # PrintError would already have displayed the warning message on load fail
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[32592] | 206 | # And on die() perl will call gsmysql destroy which will ensure a disconnect() from db
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[32583] | 207 | die("Could not use db $db_name. Can't proceed.\n");
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| 208 | }
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| 209 |
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| 210 |
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| 211 | # store db handle now that we're connected
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| 212 | $self->{'gs_sql'} = $gs_sql;
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| 213 | }
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| 214 |
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| 215 |
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[32595] | 216 | # This method also runs on import.pl if gs_sql has a value.
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[32583] | 217 | # Call deinit() not end() because there can be multiple plugin passes:
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| 218 | # one for doc level and another for section level indexing
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| 219 | # and deinit() should be called before all passes
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| 220 | # This way, we can close the SQL database once per buildcol run.
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[32595] | 221 | # Again, this doesn't matter because we gsmysql the ensures the connection
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| 222 | # is a singleton connection instance, which connects once and disconnects once per perl process.
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[32583] | 223 | sub deinit {
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| 224 | my ($self) = shift (@_);
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| 225 |
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| 226 | if($self->{'gs_sql'}) {
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| 227 |
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| 228 | # Important to call finished():
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[32592] | 229 | # it will disconnect from db if this is the last gsmysql instance,
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[32583] | 230 | # and it will commit to db before disconnecting if rollbback_on_cancel turned on
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| 231 | $self->{'gs_sql'}->finished();
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| 232 |
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| 233 | # Clear gs_sql (setting key to undef has a different meaning from deleting:
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| 234 | # undef makes key still exist but its value is unded whereas delete deletes the key)
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| 235 | # So all future use has to make the connection again
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| 236 | delete $self->{'gs_sql'};
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| 237 | }
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| 238 |
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| 239 | $self->SUPER::deinit(@_);
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| 240 | }
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| 241 |
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| 242 |
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| 243 |
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| 244 | ###### Methods only called during import.pl #####
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| 245 |
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[32563] | 246 | # This is called once if removeold is set with import.pl. Most plugins will do
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| 247 | # nothing but if a plugin does any stuff outside of creating doc obj, then
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| 248 | # it may need to clear something.
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| 249 | # In the case of GreenstoneSQL plugs: this is the first time we have a chance
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| 250 | # to purge the tables of the current collection from the current site's database
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| 251 | sub remove_all {
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| 252 | my $self = shift (@_);
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| 253 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
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| 254 |
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[32577] | 255 | $self->SUPER::remove_all(@_);
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| 256 |
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[32563] | 257 | print STDERR " Building with removeold option set, so deleting current collection's tables if they exist\n" if($self->{'verbosity'});
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| 258 |
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[32586] | 259 | # if we're in here, we'd already have run 'use database <site>;' during sub init()
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[32563] | 260 | # so we can go ahead and delete the collection's tables
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| 261 | my $gs_sql = $self->{'gs_sql'};
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| 262 | $gs_sql->delete_collection_tables(); # will delete them if they exist
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| 263 |
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| 264 | # and recreate tables? No. Tables' existence is ensured in GreenstoneSQLPlugout::begin()
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| 265 | my $proc_mode = $self->{'process_mode'};
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| 266 | if($proc_mode ne "text_only") {
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| 267 | $gs_sql->ensure_meta_table_exists();
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| 268 | }
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| 269 | if($proc_mode ne "meta_only") {
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| 270 | $gs_sql->ensure_fulltxt_table_exists();
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| 271 | }
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[32582] | 272 |
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[32563] | 273 | }
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| 274 |
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[32582] | 275 | # This is called during import.pl per document for docs that have been deleted from the
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[32563] | 276 | # collection. Most plugins will do nothing
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| 277 | # but if a plugin does any stuff outside of creating doc obj, then it may need
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| 278 | # to clear something.
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[32595] | 279 | # In the case of GreenstoneSQL plugs: Remove the doc(s) denoted by oids from GS SQL db.
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[32563] | 280 | # This takes care of incremental deletes (docs marked D by ArchivesInfPlugin when building
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[32595] | 281 | # incrementally) as well as cases of "Non-icremental Delete", see ArchivesInfPlugin.pm.
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| 282 | # As well as cases involving reindexing, which are implemented here as delete followed by add.
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[32563] | 283 | sub remove_one {
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| 284 | my $self = shift (@_);
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| 285 |
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| 286 | my ($file, $oids, $archivedir) = @_;
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| 287 |
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[32570] | 288 | my $rv = $self->SUPER::remove_one(@_);
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| 289 |
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[32563] | 290 | print STDERR "@@@ IN SQLPLUG::REMOVE_ONE: $file\n";
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| 291 |
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[32570] | 292 | #return undef unless $self->can_process_this_file($file); # NO, DON'T DO THIS (inherited remove_one behaviour) HERE:
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[32563] | 293 | # WE DON'T CARE IF IT'S AN IMAGE FILE THAT WAS DELETED.
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[32578] | 294 | # WE CARE ABOUT REMOVING THE DOC_OID OF THAT IMAGE FILE FROM THE SQL DB
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[32570] | 295 | # SO DON'T RETURN IF CAN'T_PROCESS_THIS_FILE
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| 296 |
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[32563] | 297 |
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| 298 | my $gs_sql = $self->{'gs_sql'} || return 0; # couldn't make the connection or no db etc
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| 299 |
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| 300 | my $proc_mode = $self->{'process_mode'};
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| 301 | foreach my $oid (@$oids) {
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| 302 | if($proc_mode eq "all" || $proc_mode eq "meta_only") {
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| 303 | print STDERR "@@@@@@@@ Deleting $oid from meta table\n" if $self->{'verbosity'} > 2;
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| 304 | $gs_sql->delete_recs_from_metatable_with_docid($oid);
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| 305 | }
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| 306 | if($proc_mode eq "all" || $proc_mode eq "text_only") {
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| 307 | print STDERR "@@@@@@@@ Deleting $oid from fulltxt table\n" if $self->{'verbosity'} > 2;
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| 308 | $gs_sql->delete_recs_from_texttable_with_docid($oid);
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| 309 | }
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| 310 | }
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[32570] | 311 | return $rv;
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[32563] | 312 | }
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| 313 |
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[32583] | 314 | ##### Methods called only during buildcol #####
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[32563] | 315 |
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[32542] | 316 | sub xml_start_tag {
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| 317 | my $self = shift(@_);
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| 318 | my ($expat, $element) = @_;
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[32536] | 319 |
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[32542] | 320 | my $outhandle = $self->{'outhandle'};
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| 321 |
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| 322 | $self->{'element'} = $element;
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| 323 | if ($element eq "Archive") { # docsql.xml files contain a OID attribute on Archive element
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| 324 | # the element's attributes are in %_ as per ReadXMLFile::xml_start_tag() (while $_
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| 325 | # contains the tag)
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| 326 |
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| 327 | # Don't access %_{'docoid'} directly: keep getting a warning message to
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| 328 | # use $_{'docoid'} for scalar contexts, but %_ is the element's attr hashmap
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| 329 | # whereas $_ has the tag info. So we don't want to do $_{'docoid'}.
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| 330 | my %attr_hash = %_; # right way, see OAIPlugin.pm
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[32555] | 331 | $self->{'doc_oid'} = $attr_hash{'docoid'};
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[32542] | 332 | print $outhandle "Extracted OID from docsql.xml: ".$self->{'doc_oid'}."\n"
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[32544] | 333 | if $self->{'verbosity'} > 2;
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[32542] | 334 |
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| 335 | }
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| 336 | else { # let superclass GreenstoneXMLPlugin continue to process <Section> and <Metadata> elements
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| 337 | $self->SUPER::xml_start_tag(@_);
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| 338 | }
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| 339 | }
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| 340 |
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[32591] | 341 | # There are multiple passes processing the document (see buildcol's mode parameter description):
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| 342 | # - compressing the text which may be a dummy pass for lucene/solr, wherein they still want the
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| 343 | # docobj for different purposes,
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| 344 | # - the pass(es) for indexing, e.g. doc/didx and section/sidx level passes
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| 345 | # - and an infodb pass for processing the classifiers. This pass too needs the docobj
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| 346 | # Since all passes need the doc_obj, all are read in from docsql + SQL db into the docobj in memory
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[32536] | 347 |
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[32595] | 348 | # We only ever get here or do any parsing of the docsql.xml file during the buildcol.pl phase.
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[32536] | 349 | # At the end of superclass GreenstoneXMLPlugin.pm's close_document() method,
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| 350 | # the doc_obj in memory is processed (indexed) and then made undef.
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| 351 | # So we have to work with doc_obj before superclass close_document() is finished.
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| 352 | sub close_document {
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| 353 | my $self = shift(@_);
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[32555] | 354 |
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[32563] | 355 | my $gs_sql = $self->{'gs_sql'};
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[32555] | 356 |
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[32536] | 357 | my $outhandle = $self->{'outhandle'};
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[32544] | 358 | my $doc_obj = $self->{'doc_obj'};
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[32536] | 359 |
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[32542] | 360 | my $oid = $self->{'doc_oid'}; # we stored current doc's OID during sub xml_start_tag()
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[32555] | 361 | my $proc_mode = $self->{'process_mode'};
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| 362 |
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[32538] | 363 | # For now, we have access to doc_obj (until just before super::close_document() terminates)
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[32563] | 364 |
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[32570] | 365 | # OID parsed of docsql.xml file does need to be set on $doc_obj, as noticed in this case:
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| 366 | # when a doc in import is renamed, and you do incremental import, it is marked for reindexing
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| 367 | # (reindexing is implemented by this plugin as a delete followed by add into the sql db).
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| 368 | # In that case, UNLESS you set the OID at this stage, the old deleted doc id (for the old doc
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| 369 | # name) continues to exist in the index at the end of incremental rebuilding if you were to
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| 370 | # browse the rebuilt collection by files/titles. So unless you set the OID here, the deleted
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| 371 | # doc oids will still be listed in the index.
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| 372 | $self->{'doc_obj'}->set_OID($oid);
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| 373 |
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[32563] | 374 | print STDERR " GreenstoneSQLPlugin processing doc $oid (reading into docobj from SQL db)\n"
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[32584] | 375 | if $self->{'verbosity'};
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[32555] | 376 |
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[32563] | 377 | if($proc_mode eq "all" || $proc_mode eq "meta_only") {
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| 378 | # read in meta for the collection (i.e. select * from <col>_metadata table
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[32555] | 379 |
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[32575] | 380 | my $records = $gs_sql->select_from_metatable_matching_docid($oid, $outhandle);
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[32555] | 381 |
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[32563] | 382 | print $outhandle "----------SQL DB contains meta-----------\n" if $self->{'verbosity'} > 2;
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[32575] | 383 |
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| 384 | foreach my $row (@$records) {
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| 385 | my ($primary_key, $did, $sid, $metaname, $metaval) = @$row;
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[32555] | 386 |
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[32563] | 387 | # get rid of the artificial "root" introduced in section id when saving to sql db
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| 388 | $sid =~ s@^root@@;
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| 389 | $sid = $doc_obj->get_top_section() unless $sid;
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| 390 | print $outhandle "### did: $did, sid: |$sid|, meta: $metaname, val: $metaval\n"
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[32544] | 391 | if $self->{'verbosity'} > 2;
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[32536] | 392 |
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[32595] | 393 | # We're only dealing with utf8 data where docobj is concerned
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| 394 | # Data stored unescaped in db: escaping only for html/xml files, not for txt files or db
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[32591] | 395 | $doc_obj->add_utf8_metadata($sid, $metaname, $metaval);
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[32536] | 396 | }
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[32563] | 397 | print $outhandle "----------FIN READING DOC's META FROM SQL DB------------\n"
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| 398 | if $self->{'verbosity'} > 2;
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| 399 | }
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| 400 |
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| 401 | if($proc_mode eq "all" || $proc_mode eq "text_only") {
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| 402 | # read in fulltxt for the collection (i.e. select * from <col>_fulltxt table
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[32536] | 403 |
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[32563] | 404 | my $fulltxt_table = $gs_sql->get_fulltext_table_name();
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[32536] | 405 |
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[32563] | 406 |
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[32575] | 407 | my $records = $gs_sql->select_from_texttable_matching_docid($oid, $outhandle);
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[32563] | 408 |
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[32575] | 409 |
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[32563] | 410 | print $outhandle "----------\nSQL DB contains txt entries for-----------\n"
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| 411 | if $self->{'verbosity'} > 2;
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[32575] | 412 |
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| 413 | foreach my $row (@$records) {
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| 414 | my ($primary_key, $did, $sid, $text) = @$row;
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[32555] | 415 |
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[32563] | 416 | # get rid of the artificial "root" introduced in section id when saving to sql db
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| 417 | #$sid =~ s@^root@@;
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| 418 | $sid = $doc_obj->get_top_section() if ($sid eq "root");
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| 419 | print $outhandle "### did: $did, sid: |$sid|, fulltext: <TXT>\n"
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[32544] | 420 | if $self->{'verbosity'} > 2;
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[32595] | 421 |
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| 422 | # We're only dealing with utf8 data where docobj is concerned
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| 423 | # Data stored unescaped in db: escaping is only for html/xml files, not for txt files or db
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[32591] | 424 | $doc_obj->add_utf8_textref($sid, \$text);
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[32563] | 425 | }
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| 426 | print $outhandle "----------FIN READING DOC's TXT FROM SQL DB------------\n"
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| 427 | if $self->{'verbosity'} > 2;
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| 428 | }
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[32536] | 429 |
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[32563] | 430 | # done reading into docobj from SQL db
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| 431 |
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[32536] | 432 | # don't forget to clean up on close() in superclass
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| 433 | # It will get the doc_obj indexed then make it undef
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| 434 | $self->SUPER::close_document(@_);
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| 435 | }
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| 436 |
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| 437 |
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[32583] | 438 | 1;
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