1 package Koha::SearchEngine::Elasticsearch;
3 # Copyright 2015 Catalyst IT
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it under the
8 # terms of the GNU General Public License as published by the Free Software
9 # Foundation; either version 3 of the License, or (at your option) any later
12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 # A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License along
17 # with Koha; if not, write to the Free Software Foundation, Inc.,
18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 use base qw(Class::Accessor);
25 use Koha::Exceptions::Config;
26 use Koha::SearchFields;
27 use Koha::SearchMarcMaps;
33 use Search::Elasticsearch;
37 use List::Util qw( sum0 reduce );
40 use Encode qw(encode);
43 __PACKAGE__->mk_ro_accessors(qw( index ));
44 __PACKAGE__->mk_accessors(qw( sort_fields ));
46 # Constants to refer to the standard index names
47 Readonly our $BIBLIOS_INDEX => 'biblios';
48 Readonly our $AUTHORITIES_INDEX => 'authorities';
52 Koha::SearchEngine::Elasticsearch - Base module for things using elasticsearch
60 The name of the index to use, generally 'biblios' or 'authorities'.
70 my $self = $class->SUPER::new(@_);
71 # Check for a valid index
72 Koha::Exceptions::MissingParameter->throw('No index name provided') unless $self->index;
76 =head2 get_elasticsearch
78 my $elasticsearch_client = $self->get_elasticsearch();
80 Returns a C<Search::Elasticsearch> client. The client is cached on a C<Koha::SearchEngine::ElasticSearch>
81 instance level and will be reused if method is called multiple times.
85 sub get_elasticsearch {
87 unless (defined $self->{elasticsearch}) {
88 my $conf = $self->get_elasticsearch_params();
89 $self->{elasticsearch} = Search::Elasticsearch->new($conf);
91 return $self->{elasticsearch};
94 =head2 get_elasticsearch_params
96 my $params = $self->get_elasticsearch_params();
98 This provides a hashref that contains the parameters for connecting to the
99 ElasicSearch servers, in the form:
102 'nodes' => ['127.0.0.1:9200', 'anotherserver:9200'],
103 'index_name' => 'koha_instance_index',
106 This is configured by the following in the C<config> block in koha-conf.xml:
109 <server>127.0.0.1:9200</server>
110 <server>anotherserver:9200</server>
111 <index_name>koha_instance</index_name>
116 sub get_elasticsearch_params {
119 # Copy the hash so that we're not modifying the original
120 my $conf = C4::Context->config('elasticsearch');
121 die "No 'elasticsearch' block is defined in koha-conf.xml.\n" if ( !$conf );
122 my $es = { %{ $conf } };
124 # Helpfully, the multiple server lines end up in an array for us anyway
125 # if there are multiple ones, but not if there's only one.
126 my $server = $es->{server};
127 delete $es->{server};
128 if ( ref($server) eq 'ARRAY' ) {
130 # store it called 'nodes' (which is used by newer Search::Elasticsearch)
131 $es->{nodes} = $server;
134 $es->{nodes} = [$server];
137 die "No elasticsearch servers were specified in koha-conf.xml.\n";
139 die "No elasticsearch index_name was specified in koha-conf.xml.\n"
140 if ( !$es->{index_name} );
141 # Append the name of this particular index to our namespace
142 $es->{index_name} .= '_' . $self->index;
144 $es->{key_prefix} = 'es_';
145 $es->{client} //= '5_0::Direct';
146 $es->{cxn_pool} //= 'Sniff';
147 $es->{request_timeout} //= 60;
152 =head2 get_elasticsearch_settings
154 my $settings = $self->get_elasticsearch_settings();
156 This provides the settings provided to Elasticsearch when an index is created.
157 These can do things like define tokenization methods.
159 A hashref containing the settings is returned.
163 sub get_elasticsearch_settings {
166 # Use state to speed up repeated calls
167 state $settings = undef;
168 if (!defined $settings) {
169 my $config_file = C4::Context->config('elasticsearch_index_config');
170 $config_file ||= C4::Context->config('intranetdir') . '/admin/searchengine/elasticsearch/index_config.yaml';
171 $settings = LoadFile( $config_file );
177 =head2 get_elasticsearch_mappings
179 my $mappings = $self->get_elasticsearch_mappings();
181 This provides the mappings that get passed to Elasticsearch when an index is
186 sub get_elasticsearch_mappings {
189 # Use state to speed up repeated calls
193 if (!defined $all_mappings{$self->index}) {
194 $sort_fields{$self->index} = {};
196 data => scalar _get_elasticsearch_mapping('general', '')
198 my $marcflavour = lc C4::Context->preference('marcflavour');
199 $self->_foreach_mapping(
201 my ( $name, $type, $facet, $suggestible, $sort, $marc_type ) = @_;
202 return if $marc_type ne $marcflavour;
203 # TODO if this gets any sort of complexity to it, it should
204 # be broken out into its own function.
206 # TODO be aware of date formats, but this requires pre-parsing
207 # as ES will simply reject anything with an invalid date.
208 my $es_type = 'text';
209 if ($type eq 'boolean') {
210 $es_type = 'boolean';
211 } elsif ($type eq 'number' || $type eq 'sum') {
212 $es_type = 'integer';
213 } elsif ($type eq 'isbn' || $type eq 'stdno') {
217 $mappings->{data}{properties}{$name} = _get_elasticsearch_mapping('search', $es_type);
220 $mappings->{data}{properties}{ $name . '__facet' } = _get_elasticsearch_mapping('facet', $es_type);
223 $mappings->{data}{properties}{ $name . '__suggestion' } = _get_elasticsearch_mapping('suggestible', $es_type);
225 # Sort is a bit special as it can be true, false, undef.
226 # We care about "true" or "undef",
227 # "undef" means to do the default thing, which is make it sortable.
228 if (!defined $sort || $sort) {
229 $mappings->{data}{properties}{ $name . '__sort' } = _get_elasticsearch_mapping('sort', $es_type);
230 $sort_fields{$self->index}{$name} = 1;
234 $all_mappings{$self->index} = $mappings;
236 $self->sort_fields(\%{$sort_fields{$self->index}});
238 return $all_mappings{$self->index};
241 =head2 _get_elasticsearch_mapping
243 Get the Elasticsearch mappings for the given purpose and data type.
245 $mapping = _get_elasticsearch_mapping('search', 'text');
249 sub _get_elasticsearch_mapping {
251 my ( $purpose, $type ) = @_;
253 # Use state to speed up repeated calls
254 state $settings = undef;
255 if (!defined $settings) {
256 my $config_file = C4::Context->config('elasticsearch_field_config');
257 $config_file ||= C4::Context->config('intranetdir') . '/admin/searchengine/elasticsearch/field_config.yaml';
258 $settings = LoadFile( $config_file );
261 if (!defined $settings->{$purpose}) {
262 die "Field purpose $purpose not defined in field config";
265 return $settings->{$purpose};
267 if (defined $settings->{$purpose}{$type}) {
268 return $settings->{$purpose}{$type};
270 if (defined $settings->{$purpose}{'default'}) {
271 return $settings->{$purpose}{'default'};
276 sub reset_elasticsearch_mappings {
277 my ( $reset_fields ) = @_;
278 my $mappings_yaml = C4::Context->config('elasticsearch_index_mappings');
279 $mappings_yaml ||= C4::Context->config('intranetdir') . '/admin/searchengine/elasticsearch/mappings.yaml';
280 my $indexes = LoadFile( $mappings_yaml );
282 while ( my ( $index_name, $fields ) = each %$indexes ) {
283 while ( my ( $field_name, $data ) = each %$fields ) {
284 my $field_type = $data->{type};
285 my $field_label = $data->{label};
286 my $mappings = $data->{mappings};
287 my $search_field = Koha::SearchFields->find_or_create({ name => $field_name, label => $field_label, type => $field_type }, { key => 'name' });
288 for my $mapping ( @$mappings ) {
289 my $marc_field = Koha::SearchMarcMaps->find_or_create({ index_name => $index_name, marc_type => $mapping->{marc_type}, marc_field => $mapping->{marc_field} });
290 $search_field->add_to_search_marc_maps($marc_field, { facet => $mapping->{facet} || 0, suggestible => $mapping->{suggestible} || 0, sort => $mapping->{sort} } );
296 # This overrides the accessor provided by Class::Accessor so that if
297 # sort_fields isn't set, then it'll generate it.
301 $self->_sort_fields_accessor(@_);
304 my $val = $self->_sort_fields_accessor();
307 # This will populate the accessor as a side effect
308 $self->get_elasticsearch_mappings();
309 return $self->_sort_fields_accessor();
312 =head2 _process_mappings($mappings, $data, $record_document, $altscript)
314 $self->_process_mappings($mappings, $marc_field_data, $record_document, 0)
316 Process all C<$mappings> targets operating on a specific MARC field C<$data>.
317 Since we group all mappings by MARC field targets C<$mappings> will contain
318 all targets for C<$data> and thus we need to fetch the MARC field only once.
319 C<$mappings> will be applied to C<$record_document> and new field values added.
320 The method has no return value.
326 Arrayref of mappings containing arrayrefs in the format
327 [C<$target>, C<$options>] where C<$target> is the name of the target field and
328 C<$options> is a hashref containing processing directives for this particular
333 The source data from a MARC record field.
335 =item C<$record_document>
337 Hashref representing the Elasticsearch document on which mappings should be
342 A boolean value indicating whether an alternate script presentation is being
349 sub _process_mappings {
350 my ($_self, $mappings, $data, $record_document, $altscript) = @_;
351 foreach my $mapping (@{$mappings}) {
352 my ($target, $options) = @{$mapping};
354 # Don't process sort fields for alternate scripts
355 my $sort = $target =~ /__sort$/;
356 if ($sort && $altscript) {
360 # Copy (scalar) data since can have multiple targets
361 # with differing options for (possibly) mutating data
362 # so need a different copy for each
364 $record_document->{$target} //= [];
365 if (defined $options->{substr}) {
366 my ($start, $length) = @{$options->{substr}};
367 $_data = length($data) > $start ? substr $data, $start, $length : '';
369 if (defined $options->{value_callbacks}) {
370 $_data = reduce { $b->($a) } ($_data, @{$options->{value_callbacks}});
372 if (defined $options->{property}) {
374 $options->{property} => $_data
377 push @{$record_document->{$target}}, $_data;
381 =head2 marc_records_to_documents($marc_records)
383 my @record_documents = $self->marc_records_to_documents($marc_records);
385 Using mappings stored in database convert C<$marc_records> to Elasticsearch documents.
387 Returns array of hash references, representing Elasticsearch documents,
388 acceptable as body payload in C<Search::Elasticsearch> requests.
392 =item C<$marc_documents>
394 Reference to array of C<MARC::Record> objects to be converted to Elasticsearch documents.
400 sub marc_records_to_documents {
401 my ($self, $records) = @_;
402 my $rules = $self->_get_marc_mapping_rules();
403 my $control_fields_rules = $rules->{control_fields};
404 my $data_fields_rules = $rules->{data_fields};
405 my $marcflavour = lc C4::Context->preference('marcflavour');
407 my @record_documents;
409 foreach my $record (@{$records}) {
410 my $record_document = {};
411 my $mappings = $rules->{leader};
413 $self->_process_mappings($mappings, $record->leader(), $record_document, 0);
415 foreach my $field ($record->fields()) {
416 if ($field->is_control_field()) {
417 my $mappings = $control_fields_rules->{$field->tag()};
419 $self->_process_mappings($mappings, $field->data(), $record_document, 0);
423 my $tag = $field->tag();
424 # Handle alternate scripts in MARC 21
426 if ($marcflavour eq 'marc21' && $tag eq '880') {
427 my $sub6 = $field->subfield('6');
428 if ($sub6 =~ /^(...)-\d+/) {
434 my $data_field_rules = $data_fields_rules->{$tag};
436 if ($data_field_rules) {
437 my $subfields_mappings = $data_field_rules->{subfields};
438 my $wildcard_mappings = $subfields_mappings->{'*'};
439 foreach my $subfield ($field->subfields()) {
440 my ($code, $data) = @{$subfield};
441 my $mappings = $subfields_mappings->{$code} // [];
442 if ($wildcard_mappings) {
443 $mappings = [@{$mappings}, @{$wildcard_mappings}];
446 $self->_process_mappings($mappings, $data, $record_document, $altscript);
450 my $subfields_join_mappings = $data_field_rules->{subfields_join};
451 if ($subfields_join_mappings) {
452 foreach my $subfields_group (keys %{$subfields_join_mappings}) {
453 # Map each subfield to values, remove empty values, join with space
458 map { join(' ', $field->subfield($_)) } split(//, $subfields_group)
462 $self->_process_mappings($subfields_join_mappings->{$subfields_group}, $data, $record_document, $altscript);
469 foreach my $field (keys %{$rules->{defaults}}) {
470 unless (defined $record_document->{$field}) {
471 $record_document->{$field} = $rules->{defaults}->{$field};
474 foreach my $field (@{$rules->{sum}}) {
475 if (defined $record_document->{$field}) {
476 # TODO: validate numeric? filter?
477 # TODO: Or should only accept fields without nested values?
478 # TODO: Quick and dirty, improve if needed
479 $record_document->{$field} = sum0(grep { !ref($_) && m/\d+(\.\d+)?/} @{$record_document->{$field}});
482 # Index all applicable ISBN forms (ISBN-10 and ISBN-13 with and without dashes)
483 foreach my $field (@{$rules->{isbn}}) {
484 if (defined $record_document->{$field}) {
486 foreach my $input_isbn (@{$record_document->{$field}}) {
487 my $isbn = Business::ISBN->new($input_isbn);
488 if (defined $isbn && $isbn->is_valid) {
489 my $isbn13 = $isbn->as_isbn13->as_string;
490 push @isbns, $isbn13;
492 push @isbns, $isbn13;
494 my $isbn10 = $isbn->as_isbn10;
496 $isbn10 = $isbn10->as_string;
497 push @isbns, $isbn10;
499 push @isbns, $isbn10;
502 push @isbns, $input_isbn;
505 $record_document->{$field} = \@isbns;
509 # Remove duplicate values and collapse sort fields
510 foreach my $field (keys %{$record_document}) {
511 if (ref($record_document->{$field}) eq 'ARRAY') {
512 @{$record_document->{$field}} = do {
514 grep { !$seen{ref($_) eq 'HASH' && defined $_->{input} ? $_->{input} : $_}++ } @{$record_document->{$field}};
516 if ($field =~ /__sort$/) {
517 # Make sure to keep the sort field length sensible. 255 was chosen as a nice round value.
518 $record_document->{$field} = [substr(join(' ', @{$record_document->{$field}}), 0, 255)];
523 # TODO: Perhaps should check if $records_document non empty, but really should never be the case
524 $record->encoding('UTF-8');
527 # Temporarily intercept all warn signals (MARC::Record carps when record length > 99999)
528 local $SIG{__WARN__} = sub {
529 push @warnings, $_[0];
531 $record_document->{'marc_data'} = encode_base64(encode('UTF-8', $record->as_usmarc()));
534 # Suppress warnings if record length exceeded
535 unless (substr($record->leader(), 0, 5) eq '99999') {
536 foreach my $warning (@warnings) {
540 $record_document->{'marc_data'} = $record->as_xml_record($marcflavour);
541 $record_document->{'marc_format'} = 'MARCXML';
544 $record_document->{'marc_format'} = 'base64ISO2709';
546 my $id = $record->subfield('999', 'c');
547 push @record_documents, [$id, $record_document];
549 return \@record_documents;
552 =head2 _field_mappings($facet, $suggestible, $sort, $target_name, $target_type, $range)
554 my @mappings = _field_mappings($facet, $suggestible, $sort, $target_name, $target_type, $range)
556 Get mappings, an internal data structure later used by
557 L<_process_mappings($mappings, $data, $record_document, $altscript)> to process MARC target
558 data for a MARC mapping.
560 The returned C<$mappings> is not to to be confused with mappings provided by
561 C<_foreach_mapping>, rather this sub accepts properties from a mapping as
562 provided by C<_foreach_mapping> and expands it to this internal data structure.
563 In the caller context (C<_get_marc_mapping_rules>) the returned C<@mappings>
564 is then applied to each MARC target (leader, control field data, subfield or
565 joined subfields) and integrated into the mapping rules data structure used in
566 C<marc_records_to_documents> to transform MARC records into Elasticsearch
573 Boolean indicating whether to create a facet field for this mapping.
575 =item C<$suggestible>
577 Boolean indicating whether to create a suggestion field for this mapping.
581 Boolean indicating whether to create a sort field for this mapping.
583 =item C<$target_name>
585 Elasticsearch document target field name.
587 =item C<$target_type>
589 Elasticsearch document target field type.
593 An optional range as a string in the format "<START>-<END>" or "<START>",
594 where "<START>" and "<END>" are integers specifying a range that will be used
595 for extracting a substring from MARC data as Elasticsearch field target value.
597 The first character position is "1", and the range is inclusive,
598 so "1-3" means the first three characters of MARC data.
600 If only "<START>" is provided only one character at position "<START>" will
607 sub _field_mappings {
608 my ($_self, $facet, $suggestible, $sort, $target_name, $target_type, $range) = @_;
609 my %mapping_defaults = ();
612 my $substr_args = undef;
614 # TODO: use value_callback instead?
615 my ($start, $end) = map(int, split /-/, $range, 2);
616 $substr_args = [$start];
617 push @{$substr_args}, (defined $end ? $end - $start + 1 : 1);
619 my $default_options = {};
621 $default_options->{substr} = $substr_args;
624 # TODO: Should probably have per type value callback/hook
625 # but hard code for now
626 if ($target_type eq 'boolean') {
627 $default_options->{value_callbacks} //= [];
628 push @{$default_options->{value_callbacks}}, sub {
630 # Trim whitespace at both ends
631 $value =~ s/^\s+|\s+$//g;
632 return $value ? 'true' : 'false';
636 my $mapping = [$target_name, $default_options];
637 push @mappings, $mapping;
640 push @suffixes, 'facet' if $facet;
641 push @suffixes, 'suggestion' if $suggestible;
642 push @suffixes, 'sort' if !defined $sort || $sort;
644 foreach my $suffix (@suffixes) {
645 my $mapping = ["${target_name}__$suffix"];
646 # TODO: Hack, fix later in less hideous manner
647 if ($suffix eq 'suggestion') {
648 push @{$mapping}, {%{$default_options}, property => 'input'};
651 push @{$mapping}, $default_options;
653 push @mappings, $mapping;
658 =head2 _get_marc_mapping_rules
660 my $mapping_rules = $self->_get_marc_mapping_rules()
662 Generates rules from mappings stored in database for MARC records to Elasticsearch JSON document conversion.
664 Since field retrieval is slow in C<MARC::Records> (all fields are itereted through for
665 each call to C<MARC::Record>->field) we create an optimized structure of mapping
666 rules keyed by MARC field tags holding all the mapping rules for that particular tag.
668 We can then iterate through all MARC fields for each record and apply all relevant
669 rules once per fields instead of retreiving fields multiple times for each mapping rule
670 which is terribly slow.
674 # TODO: This structure can be used for processing multiple MARC::Records so is currently
675 # rebuilt for each batch. Since it is cacheable it could also be stored in an in
676 # memory cache which it is currently not. The performance gain of caching
677 # would probably be marginal, but to do this could be a further improvement.
679 sub _get_marc_mapping_rules {
681 my $marcflavour = lc C4::Context->preference('marcflavour');
682 my $field_spec_regexp = qr/^([0-9]{3})([()0-9a-z]+)?(?:_\/(\d+(?:-\d+)?))?$/;
683 my $leader_regexp = qr/^leader(?:_\/(\d+(?:-\d+)?))?$/;
686 'control_fields' => {},
693 $self->_foreach_mapping(sub {
694 my ($name, $type, $facet, $suggestible, $sort, $marc_type, $marc_field) = @_;
695 return if $marc_type ne $marcflavour;
697 if ($type eq 'sum') {
698 push @{$rules->{sum}}, $name;
700 elsif ($type eq 'isbn') {
701 push @{$rules->{isbn}}, $name;
703 elsif ($type eq 'boolean') {
704 # boolean gets special handling, if value doesn't exist for a field,
706 $rules->{defaults}->{$name} = 'false';
709 if ($marc_field =~ $field_spec_regexp) {
714 # Parse and separate subfields form subfield groups
716 my $subfield_group = '';
719 foreach my $token (split //, $2) {
722 Koha::Exceptions::Elasticsearch::MARCFieldExprParseError->throw(
723 "Unmatched opening parenthesis for $marc_field"
730 elsif ($token eq ")") {
732 if ($subfield_group) {
733 push @subfield_groups, $subfield_group;
734 $subfield_group = '';
739 Koha::Exceptions::Elasticsearch::MARCFieldExprParseError->throw(
740 "Unmatched closing parenthesis for $marc_field"
744 elsif ($open_group) {
745 $subfield_group .= $token;
748 push @subfields, $token;
753 push @subfields, '*';
756 my $range = defined $3 ? $3 : undef;
757 my @mappings = $self->_field_mappings($facet, $suggestible, $sort, $name, $type, $range);
759 if ($field_tag < 10) {
760 $rules->{control_fields}->{$field_tag} //= [];
761 push @{$rules->{control_fields}->{$field_tag}}, @mappings;
764 $rules->{data_fields}->{$field_tag} //= {};
765 foreach my $subfield (@subfields) {
766 $rules->{data_fields}->{$field_tag}->{subfields}->{$subfield} //= [];
767 push @{$rules->{data_fields}->{$field_tag}->{subfields}->{$subfield}}, @mappings;
769 foreach my $subfield_group (@subfield_groups) {
770 $rules->{data_fields}->{$field_tag}->{subfields_join}->{$subfield_group} //= [];
771 push @{$rules->{data_fields}->{$field_tag}->{subfields_join}->{$subfield_group}}, @mappings;
775 elsif ($marc_field =~ $leader_regexp) {
776 my $range = defined $1 ? $1 : undef;
777 my @mappings = $self->_field_mappings($facet, $suggestible, $sort, $name, $type, $range);
778 push @{$rules->{leader}}, @mappings;
781 Koha::Exceptions::Elasticsearch::MARCFieldExprParseError->throw(
782 "Invalid MARC field expression: $marc_field"
789 =head2 _foreach_mapping
791 $self->_foreach_mapping(
793 my ( $name, $type, $facet, $suggestible, $sort, $marc_type,
796 return unless $marc_type eq 'marc21';
797 print "Data comes from: " . $marc_field . "\n";
801 This allows you to apply a function to each entry in the elasticsearch mappings
802 table, in order to build the mappings for whatever is needed.
804 In the provided function, the files are:
810 The field name for elasticsearch (corresponds to the 'mapping' column in the
815 The type for this value, e.g. 'string'.
819 True if this value should be facetised. This only really makes sense if the
820 field is understood by the facet processing code anyway.
824 True if this is a field that a) needs special sort handling, and b) if it
825 should be sorted on. False if a) but not b). Undef if not a). This allows,
826 for example, author to be sorted on but not everything marked with "author"
827 to be included in that sort.
831 A string that indicates the MARC type that this mapping is for, e.g. 'marc21',
832 'unimarc', 'normarc'.
836 A string that describes the MARC field that contains the data to extract.
837 These are of a form suited to Catmandu's MARC fixers.
843 sub _foreach_mapping {
844 my ( $self, $sub ) = @_;
846 # TODO use a caching framework here
847 my $search_fields = Koha::Database->schema->resultset('SearchField')->search(
849 'search_marc_map.index_name' => $self->index,
851 { join => { search_marc_to_fields => 'search_marc_map' },
853 'search_marc_to_fields.facet',
854 'search_marc_to_fields.suggestible',
855 'search_marc_to_fields.sort',
856 'search_marc_map.marc_type',
857 'search_marc_map.marc_field',
869 while ( my $search_field = $search_fields->next ) {
871 # Force lower case on indexed field names for case insensitive
872 # field name searches
873 lc($search_field->name),
875 $search_field->get_column('facet'),
876 $search_field->get_column('suggestible'),
877 $search_field->get_column('sort'),
878 $search_field->get_column('marc_type'),
879 $search_field->get_column('marc_field'),
886 die process_error($@);
888 This parses an Elasticsearch error message and produces a human-readable
889 result from it. This result is probably missing all the useful information
890 that you might want in diagnosing an issue, so the warning is also logged.
892 Note that currently the resulting message is not internationalised. This
893 will happen eventually by some method or other.
898 my ($self, $msg) = @_;
900 warn $msg; # simple logging
902 # This is super-primitive
903 return "Unable to understand your search query, please rephrase and try again.\n" if $msg =~ /ParseException/;
905 return "Unable to perform your search. Please try again.\n";
908 =head2 _read_configuration
910 my $conf = _read_configuration();
912 Reads the I<configuration file> and returns a hash structure with the
913 configuration information. It raises an exception if mandatory entries
916 The hashref structure has the following form:
919 'nodes' => ['127.0.0.1:9200', 'anotherserver:9200'],
920 'index_name' => 'koha_instance',
923 This is configured by the following in the C<config> block in koha-conf.xml:
926 <server>127.0.0.1:9200</server>
927 <server>anotherserver:9200</server>
928 <index_name>koha_instance</index_name>
933 sub _read_configuration {
937 my $conf = C4::Context->config('elasticsearch');
938 Koha::Exceptions::Config::MissingEntry->throw(
939 "Missing 'elasticsearch' block in config file")
940 unless defined $conf;
942 if ( $conf && $conf->{server} ) {
943 my $nodes = $conf->{server};
944 if ( ref($nodes) eq 'ARRAY' ) {
945 $configuration->{nodes} = $nodes;
948 $configuration->{nodes} = [$nodes];
952 Koha::Exceptions::Config::MissingEntry->throw(
953 "Missing 'server' entry in config file for elasticsearch");
956 if ( defined $conf->{index_name} ) {
957 $configuration->{index_name} = $conf->{index_name};
960 Koha::Exceptions::Config::MissingEntry->throw(
961 "Missing 'index_name' entry in config file for elasticsearch");
964 return $configuration;
975 =item Chris Cormack C<< <chrisc@catalyst.net.nz> >>
977 =item Robin Sheat C<< <robin@catalyst.net.nz> >>
979 =item Jonathan Druart C<< <jonathan.druart@bugs.koha-community.org> >>