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#!/usr/bin/perl -w |
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package MWS::Plucene; |
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use strict; |
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use warnings; |
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use MWS::Indexer; |
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our @ISA=qw(MWS::Indexer); |
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our $VERSION = '0.01'; |
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use Plucene::Simple; |
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use Carp; |
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use Data::Dumper; |
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=head1 NAME |
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MWS::Plucene - index your data using Plucene |
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=head1 DESCRIPTION |
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Simple implementation to use Lucene port to perl |
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=head1 METHODS |
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=head2 open_index |
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$self->open_index; |
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=cut |
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sub open_index { |
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my $self = shift; |
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$self->{index} = Plucene::Simple->open($self->{index_dir}) || croak "can't open index '",$self->{index_dir},"': $!"; |
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return $self->{index}; |
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} |
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=head2 search_index |
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my @results = $self->search_index('message:funny'); |
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Date limits are, well, cludged and sort isn't supported! |
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=cut |
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sub search_index { |
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my $self = shift; |
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my $s = shift || croak "search_index needs query"; |
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$self->open_index if (! $self->{index}); |
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# kill sort:something [asc|desc] |
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$s =~ s/sort:\w+\s+\w+//; |
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my ($y,$m,$d); |
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if ($s =~ s/date:"*(\d{4})(?:-(\d{2}))*(?:-(\d{2}))*"*//) { |
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($y,$m,$d) = ($1,$2,$3); |
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my ($df,$dt); # date from, to |
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if ($y && $m && $d) { |
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$df = $self->fmtdate($y,$m,$y); |
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$dt = $df; |
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} elsif ($y && $m) { |
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$df = $self->fmtdate($y,$m)."-01"; |
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$dt = $self->fmtdate($y,$m)."-31"; |
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} elsif ($y) { |
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$df = $self->fmtdate($y)."-01-01"; |
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$dt = $self->fmtdate($y)."-12-31"; |
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} |
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print STDERR "Plucene query $s [from $df to $dt]\n" if ($self->{debug}); |
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return $self->{index}->search_during($s, $df => $dt); |
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} else { |
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print STDERR "Plucene query $s\n" if ($self->{debug}); |
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return $self->{index}->search($s); |
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} |
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} |
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=head2 add_index |
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$self->add_index($mbox_id, $document); |
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This method will try to fake "message" field which is used to search whole |
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message (including headers) with body and subject. Duplicating content is |
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wrong, but using Plucene::Simple has it's limitations. |
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It will also remove time from date to make Plucene happy. |
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=cut |
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sub add_index { |
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my $self = shift; |
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my $mbox_id = shift || croak "add_index needs mbox_id"; |
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my $document = shift || croak "add_index needs document"; |
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$self->open_index if (! $self->{index}); |
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# does index withh document allready exist? |
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if (-f $self->{index_dir}."/segmets") { |
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return if ($self->{index}->search("id:".$document->{id})); |
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} |
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print STDERR "add_index($mbox_id)\n" if ($self->{debug}); |
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$document->{message} = ($document->{body} || '') . ($document->{subject} || ''); |
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$document->{date} =~ s/\d{4}-\d+-\d+.*//; |
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$self->{index}->add($mbox_id => $document ); |
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} |
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=head2 close_index |
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$self->close_index; |
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This will also optimize Plucene index file. |
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=cut |
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sub close_index { |
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my $self = shift; |
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$self->{index}->optimize; |
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} |
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