WebService::Solr(3) Module to interface with the Solr (Lucene) webservice

SYNOPSIS


my $solr = WebService::Solr->new;
$solr->add( @docs );
my $response = $solr->search( $query );
for my $doc ( $response->docs ) {
print $doc->value_for( $id );
}

DESCRIPTION

WebService::Solr is a client library for Apache Lucene's Solr; an enterprise-grade indexing and searching platform.

ACCESSORS

  • url - the webservice base url
  • agent - a user agent object
  • autocommit - a boolean value for automatic commit() after add/update/delete (default: enabled)
  • default_params - a hashref of parameters to send on every request
  • last_response - stores a WebService::Solr::Response for the last request

HTTP KEEP-ALIVE

Enabling HTTP Keep-Alive is as simple as passing your custom user-agent to the constructor. 

    my $solr = WebService::Solr->new( $url,
        { agent => LWP::UserAgent->new( keep_alive => 1 ) }
    );

Visit LWP::UserAgent's documentation for more information and available options.

METHODS

new( $url, \%options )

Creates a new WebService::Solr instance. If $url is omitted, then "http://localhost:8983/solr" is used as a default. Available options are listed in the ACCESSORS section.

BUILDARGS( @args )

A Moose override to allow our custom constructor.

add( $doc|\@docs, \%options )

Adds a number of documents to the index. Returns true on success, false otherwise. A document can be a WebService::Solr::Document object or a structure that can be passed to "WebService::Solr::Document->new". Available options as of Solr 1.4 are:
  • overwrite (default: true) - Replace previously added documents with the same uniqueKey
  • commitWithin (in milliseconds) - The document will be added within the specified time

update( $doc|\@docs, \%options )

Alias for "add()".

delete( \%options )

Deletes documents matching the options provided. The delete operation currently accepts "query" and "id" parameters. Multiple values can be specified as array references. 

    # delete documents matching "title:bar" or uniqueId 13 or 42
    $solr->delete( {
        query => 'title:bar',
        id    => [ 13, 42 ],
    } );

delete_by_id( $id )

Deletes all documents matching the id specified. Returns true on success, false otherwise.

delete_by_query( $query )

Deletes documents matching $query. Returns true on success, false otherwise.

search( $query, \%options )

Searches the index given a $query. Returns a WebService::Solr::Response object. All key-value pairs supplied in "\%options" are serialized in the request URL.

If filter queries are needed, create WebService::Solr::Query objects and pass them into the %options. For example, if you were searching a database of books for a subject of ``Perl'', but wanted only paperbacks and a copyright year of 2011 or 2012: 

    my $query = WebService::Solr::Query->new( { subject => 'Perl' } );
    my %options = (
        fq => [
            WebService::Solr::Query->new( { binding => 'Paperback' } ),
            WebService::Solr::Query->new( { year => [ 2011, 2012 ] } ),
        ],
    );
    my $response = $solr->search( $query, \%options );

The filter queries are typically added when drilling down into search results and selecting a facet to drill into.

auto_suggest( \%options )

Get suggestions from a list of terms for a given field. The Solr wiki has more details about the available options (http://wiki.apache.org/solr/TermsComponent)

commit( \%options )

Sends a commit command. Returns true on success, false otherwise. You must do a commit after an add, update or delete. By default, autocommit is enabled. You may disable autocommit to allow you to issue commit commands manually: 

    my $solr = WebService::Solr->new( undef, { autocommit => 0 } );
    $solr->add( $doc ); # will not automatically call commit()
    $solr->commit;

Options as of Solr 1.4 include:

  • maxSegments (default: 1) - Optimizes down to at most this number of segments
  • waitFlush (default: true) - Block until index changes are flushed to disk
  • waitSearcher (default: true) - Block until a new searcher is opened
  • expungeDeletes (default: false) - Merge segments with deletes away

rollback( )

This method will rollback any additions/deletions since the last commit.

optimize( \%options )

Sends an optimize command. Returns true on success, false otherwise.

Options as of Solr 1.4 are the same as "commit()".

ping( )

Sends a basic ping request. Returns true on success, false otherwise.

generic_solr_request( $path, \%query )

Performs a simple "GET" request appending $path to the base URL and using key-value pairs from "\%query" to generate the query string. This should allow you to access parts of the Solr API that don't yet have their own correspondingly named function (e.g. "dataimport" ).

AUTHORS

Brian Cassidy <[email protected]>

Kirk Beers

COPYRIGHT AND LICENSE

Copyright 2008-2014 National Adult Literacy Database

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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