Cache::RemovalStrategy::LRU - LRU Removal Strategy for a Cache

Cache documentation Contained in the Cache distribution.

Index

Code Index:

NAME

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Cache::RemovalStrategy::LRU - LRU Removal Strategy for a Cache

DESCRIPTION

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Implements a Least Recently Used removal strategy for a Cache. When removing entries from the cache, the 'stalest' will be removed first.

METHODS

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See Cache::RemovalStrategy for details.

SEE ALSO

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Cache

AUTHOR

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 Chris Leishman <chris@leishman.org>
 Based on work by DeWitt Clinton <dewitt@unto.net>

COPYRIGHT

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 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 $

Cache documentation Contained in the Cache distribution. 
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__