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package WebService::Lucene; |
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use strict; |
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use warnings; |
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use base qw( WebService::Lucene::Client Class::Accessor::Fast ); |
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use URI; |
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use Carp qw( croak ); |
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use WebService::Lucene::Index; |
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use WebService::Lucene::XOXOParser; |
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use XML::LibXML; |
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use Scalar::Util (); |
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our $VERSION = '0.10'; |
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__PACKAGE__->mk_accessors( |
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qw( |
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base_url indices_ref properties_ref title_info |
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service_doc_fetched |
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) |
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); |
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=head1 NAME |
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WebService::Lucene - Module to interface with the Lucene indexing webservice |
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=head1 SYNOPSIS |
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# Connect to the web service |
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$ws = WebService::Lucene->new( $url ); |
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# Create an index |
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$ndex = $ws->create_index( $index ); |
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# Get a particular index |
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$index = $ws->get_index( $name ); |
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# Index a document |
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$document = $index->add_document( $document ); |
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# Get a document |
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$document = $index->get_document( $id ); |
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# Delete the document |
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$document->delete; |
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# Search an index |
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$results = $index->search( $query ); |
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# Get documents from search |
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@documents = $results->documents; |
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# Delete an index |
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$index->delete; |
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=head1 DESCRIPTION |
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This module is a Perl API in to the Lucene indexing web service. |
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http://lucene-ws.net/ |
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=head1 METHODS |
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=head2 new( $url ) |
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This method will connect to the Lucene Web Service located at C<$url>. |
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my $ws = WebService::Lucene->new( 'http://localhost:8080/lucene/' ); |
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=cut |
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sub new { |
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my ( $class, $url ) = @_; |
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croak( "No URL specified" ) unless $url; |
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if ( !ref $url ) { |
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$url =~ s{/?$}{/}; |
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$url = URI->new( $url ); |
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} |
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my $self = $class->SUPER::new; |
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$self->base_url( $url ); |
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$self->indices_ref( {} ); |
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return $self; |
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} |
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=head2 base_url( [$url] ) |
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Accessor for the base url of the service. |
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=head2 get_index( $name ) |
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Retuens an L object for C<$name>. |
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=cut |
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sub get_index { |
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my ( $self, $name ) = @_; |
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my $indices_ref = $self->indices_ref; |
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return $name if Scalar::Util::blessed $name; |
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if ( ref $name ) { |
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$name = join( ',', |
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map { Scalar::Util::blessed $_ ? $_->name : $_ } @$name ); |
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} |
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if ( my $index = $indices_ref->{ $name } ) { |
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return $index; |
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} |
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# make sure it ends in a slash |
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my $urlname = $name; |
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$urlname =~ s{/?$}{/}; |
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$indices_ref->{ $name } = WebService::Lucene::Index->new( |
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URI->new_abs( $urlname, $self->base_url ) ); |
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return $indices_ref->{ $name }; |
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} |
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=head2 indexes( ) |
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Alias for C |
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=head2 indices( ) |
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Returns an array of L objects. |
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=cut |
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*indexes = \&indices; |
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sub indices { |
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my $self = shift; |
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if ( !$self->service_doc_fetched ) { |
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$self->_fetch_service_document; |
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} |
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my $indices = $self->indices_ref; |
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# filter out multi-indicies |
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return map { $indices->{ $_ } } grep { $_ !~ /,/ } keys %$indices; |
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} |
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=head2 properties( [$properties] ) |
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Hash reference to a list of properties for the service. |
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=cut |
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sub properties { |
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my $self = shift; |
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if ( !$self->properties_ref ) { |
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$self->_fetch_service_properties; |
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} |
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return $self->properties_ref; |
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} |
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=head2 _fetch_service_properties( ) |
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Grabs the C documents and sends the contents |
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to C<_parse_service_properties>. |
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=cut |
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sub _fetch_service_properties { |
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my ( $self ) = @_; |
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my $entry = $self->getEntry( |
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URI->new_abs( 'service.properties', $self->base_url ) ); |
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$self->_parse_service_properties( $entry->content->body ); |
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} |
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=head2 _parse_service_properties( $xml ) |
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Parses the XML and populates the object's C |
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=cut |
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184
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sub _parse_service_properties { |
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my ( $self, $xml ) = @_; |
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187
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$self->properties_ref( |
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{ map { $_->{ name } => $_->{ value } } |
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WebService::Lucene::XOXOParser->parse( $xml ) |
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} |
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); |
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} |
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194
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=head2 _fetch_service_document( ) |
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196
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Connects to the service url and passes the contents on to |
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C<_parse_service_document>. |
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199
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=cut |
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201
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sub _fetch_service_document { |
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my ( $self ) = @_; |
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$self->_parse_service_document( |
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$self->_fetch_content( $self->base_url ) ); |
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$self->service_doc_fetched( 1 ); |
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} |
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208
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=head2 _parse_service_document( $xml ) |
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Parses the Atom Publishing Protocol introspection document and populates |
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the service's C. |
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213
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=cut |
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215
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sub _parse_service_document { |
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my ( $self, $xml ) = @_; |
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218
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my $parser = XML::LibXML->new; |
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my $doc = $parser->parse_string( $xml ); |
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my $indices = $self->indices_ref; |
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my ( $workspace ) |
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= $doc->documentElement->getChildrenByTagName( 'workspace' ); |
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225
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my( $title ) = $workspace->getElementsByLocalName( 'title' ); |
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$self->title_info( $title->textContent ); |
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228
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for my $collection ( $workspace->getChildrenByTagName( 'collection' ) ) { |
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my $url = $collection->getAttributeNode( 'href' )->value; |
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my ( $name ) = $url =~ m{/([^/]+)/?$}; |
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next if exists $indices->{ $name }; |
232
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$indices->{ $name } = WebService::Lucene::Index->new( $url ); |
233
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} |
234
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} |
235
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236
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=head2 title( [$title] ) |
237
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238
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Accessor for the title of the service. |
239
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240
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=cut |
241
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242
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sub title { |
243
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my ( $self ) = @_; |
244
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245
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if ( !$self->service_doc_fetched ) { |
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$self->_fetch_service_document; |
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} |
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249
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return $self->title_info; |
250
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} |
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252
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=head2 _fetch_content( $url ) |
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254
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Shortcut for fetching the content at C<$url>. |
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256
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=cut |
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258
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sub _fetch_content { |
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my ( $self, $url ) = @_; |
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my $response = $self->{ ua }->get( $url ); |
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return $response->content; |
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} |
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266
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=head2 create_index( $name ) |
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Creates the index on the server and returns the |
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L object. |
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271
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=cut |
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273
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sub create_index { |
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my ( $self, $name ) = @_; |
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my $index = $self->get_index( $name ); |
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return $index->create; |
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} |
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279
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=head2 delete_index( $name ) |
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281
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Deletes an index. |
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283
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=cut |
284
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285
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sub delete_index { |
286
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my ( $self, $name ) = @_; |
287
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my $index = $self->get_index( $name ); |
288
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return $index->delete; |
289
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} |
290
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291
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=head2 update( ) |
292
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293
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Updates the C document. |
294
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295
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=cut |
296
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297
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sub update { |
298
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my ( $self ) = @_; |
299
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|
$self->updateEntry( URI->new_abs( 'service.properties', $self->base_url ), |
300
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|
$self->_properties_as_entry ); |
301
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} |
302
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303
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=head2 _properties_as_entry( ) |
304
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305
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|
Genereates an L suitable for updating |
306
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|
the C document. |
307
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308
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|
=cut |
309
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310
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|
sub _properties_as_entry { |
311
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|
|
my ( $self ) = @_; |
312
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|
313
|
|
|
|
|
|
|
my $entry = XML::Atom::Entry->new; |
314
|
|
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|
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|
|
$entry->title( 'service.properties' ); |
315
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|
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|
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|
|
|
316
|
|
|
|
|
|
|
my $props = $self->properties_ref; |
317
|
|
|
|
|
|
|
my @properties = map +{ name => $_, value => $props->{ $_ } }, |
318
|
|
|
|
|
|
|
keys %$props; |
319
|
|
|
|
|
|
|
my $xml = WebService::Lucene::XOXOParser->construct( @properties ); |
320
|
|
|
|
|
|
|
|
321
|
|
|
|
|
|
|
$entry->content( $xml ); |
322
|
|
|
|
|
|
|
$entry->content->type( 'xhtml' ); |
323
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
return $entry; |
325
|
|
|
|
|
|
|
} |
326
|
|
|
|
|
|
|
|
327
|
|
|
|
|
|
|
=head2 search( $indices, $query, [$params] ) |
328
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
Searches one or more indices for C<$query>. Returns an |
330
|
|
|
|
|
|
|
L object. |
331
|
|
|
|
|
|
|
|
332
|
|
|
|
|
|
|
my $results = $ws->search( [ 'index1', 'index2' ], 'foo' ); |
333
|
|
|
|
|
|
|
|
334
|
|
|
|
|
|
|
=cut |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
sub search { |
337
|
|
|
|
|
|
|
my ( $self, $name, @rest ) = @_; |
338
|
|
|
|
|
|
|
return $self->get_index( $name )->search( @rest ); |
339
|
|
|
|
|
|
|
} |
340
|
|
|
|
|
|
|
|
341
|
|
|
|
|
|
|
=head2 facets( $indices, [$params] ) |
342
|
|
|
|
|
|
|
|
343
|
|
|
|
|
|
|
Gets facets for one or more indices. Returns an |
344
|
|
|
|
|
|
|
L object. |
345
|
|
|
|
|
|
|
|
346
|
|
|
|
|
|
|
my $results = $ws->facets( [ 'index1', 'index2' ] ); |
347
|
|
|
|
|
|
|
|
348
|
|
|
|
|
|
|
=cut |
349
|
|
|
|
|
|
|
|
350
|
|
|
|
|
|
|
sub facets { |
351
|
|
|
|
|
|
|
my ( $self, $name, @rest ) = @_; |
352
|
|
|
|
|
|
|
return $self->get_index( $name )->facets( @rest ); |
353
|
|
|
|
|
|
|
} |
354
|
|
|
|
|
|
|
|
355
|
|
|
|
|
|
|
=head1 SEE ALSO |
356
|
|
|
|
|
|
|
|
357
|
|
|
|
|
|
|
=over 4 |
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
=item * L |
360
|
|
|
|
|
|
|
|
361
|
|
|
|
|
|
|
=item * L |
362
|
|
|
|
|
|
|
|
363
|
|
|
|
|
|
|
=item * http://lucene-ws.net/ |
364
|
|
|
|
|
|
|
|
365
|
|
|
|
|
|
|
=back |
366
|
|
|
|
|
|
|
|
367
|
|
|
|
|
|
|
=head1 AUTHORS |
368
|
|
|
|
|
|
|
|
369
|
|
|
|
|
|
|
Brian Cassidy Ebricas@cpan.orgE |
370
|
|
|
|
|
|
|
|
371
|
|
|
|
|
|
|
Adam Paynter Eadapay@cpan.orgE |
372
|
|
|
|
|
|
|
|
373
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
374
|
|
|
|
|
|
|
|
375
|
|
|
|
|
|
|
Copyright 2006-2009 National Adult Literacy Database |
376
|
|
|
|
|
|
|
|
377
|
|
|
|
|
|
|
This library is free software; you can redistribute it and/or modify |
378
|
|
|
|
|
|
|
it under the same terms as Perl itself. |
379
|
|
|
|
|
|
|
|
380
|
|
|
|
|
|
|
=cut |
381
|
|
|
|
|
|
|
|
382
|
|
|
|
|
|
|
1; |