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Plucene::Index::Writer.3pm
Langue: en
Version: 2005-09-05 (ubuntu - 08/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
Plucene::Index::Writer - write an index.SYNOPSIS
my $writer = Plucene::Index::Writer->new($path, $analyser, $create); $writer->add_document($doc); $writer->add_indexes(@dirs); $writer->optimize; # called before close my $doc_count = $writer->doc_count; my $mergefactor = $writer->mergefactor; $writer->set_mergefactor($value);
DESCRIPTION
This is the writer class.If an index will not have more documents added for a while and optimal search performance is desired, then the "optimize" method should be called before the index is closed.
METHODS
new
my $writer = Plucene::Index::Writer->new($path, $analyser, $create);
This will create a new Plucene::Index::Writer object.
The third argument to the constructor determines whether a new index is created, or whether an existing index is opened for the addition of new documents.
mergefactor / set_mergefactor
my $mergefactor = $writer->mergefactor; $writer->set_mergefactor($value);
Get / set the mergefactor. It defaults to 5.
doc_count
my $doc_count = $writer->doc_count;
add_document
$writer->add_document($doc);
Adds a document to the index. After the document has been added, a merge takes place if there are more than $Plucene::Index::Writer::mergefactor segments in the index. This defaults to 10, but can be set to whatever value is optimal for your application.
optimize
$writer->optimize;
Merges all segments together into a single segment, optimizing an index for search. This should be the last method called on an indexer, as it invalidates the writer object.
add_indexes
$writer->add_indexes(@dirs);
Merges all segments from an array of indexes into this index.
This may be used to parallelize batch indexing. A large document collection can be broken into sub-collections. Each sub-collection can be indexed in parallel, on a different thread, process or machine. The complete index can then be created by merging sub-collection indexes with this method.
After this completes, the index is optimized.
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