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=head1 NAME
Cache::RemovalStrategy::LRU - LRU Removal Strategy for a Cache
=head1 DESCRIPTION
Implements a Least Recently Used removal strategy for a Cache. When removing
entries from the cache, the 'stalest' will be removed first.
=head1 METHODS
See Cache::RemovalStrategy for details.
=cut
package Cache::RemovalStrategy::LRU;
require 5.006;
use strict;
use warnings;
use base qw(Cache::RemovalStrategy);
use fields qw();
sub new {
my Cache::RemovalStrategy::LRU $self = shift;
$self = fields::new($self) unless ref $self;
$self->SUPER::new(@_);
return $self;
}
sub remove_size {
my Cache::RemovalStrategy::LRU $self = shift;
my ($cache, $size) = @_;
while ($size > 0) {
my $removed = $cache->remove_stalest();
defined $removed or last;
$size -= $removed;
}
}
1;
__END__
=head1 SEE ALSO
Cache
=head1 AUTHOR
Chris Leishman <chris@leishman.org>
Based on work by DeWitt Clinton <dewitt@unto.net>
=head1 COPYRIGHT
Copyright (C) 2003-2006 Chris Leishman. All Rights Reserved.
This module is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
either expressed or implied. This program is free software; you can
redistribute or modify it under the same terms as Perl itself.
$Id: LRU.pm,v 1.4 2006/01/31 15:23:58 caleishm Exp $
=cut
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