/usr/share/perl5/Cache/Null.pm is in libcache-perl 2.10-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | =head1 NAME
Cache::Null - Null implementation of the Cache interface
=head1 SYNOPSIS
use Cache::Null;
my $cache = Cache::Null->new();
See Cache for the usage synopsis.
=head1 DESCRIPTION
The Cache::Null class implements the Cache interface, but does not actually
persist data. This is useful when developing and debugging a system and you
wish to easily turn off caching. As a result, all calls return results
indicating that there is no data stored.
=cut
package Cache::Null;
require 5.006;
use strict;
use warnings;
use Cache::Null::Entry;
use base qw(Cache);
use fields qw(cache_root);
our $VERSION = '2.10';
=head1 CONSTRUCTOR
my $cache = Cache::Null->new( %options )
The constructor takes cache properties as named arguments, for example:
my $cache = Cache::Null->new( default_expires => '600 sec' );
See 'PROPERTIES' below and in the Cache documentation for a list of all
available properties that can be set. However it should be noted that all the
existing properties, such as default_expires, have no effect in a Null cache.
=cut
sub new {
my Cache::Null $self = shift;
my $args = $#_? { @_ } : shift;
$self = fields::new($self) unless ref $self;
$self->SUPER::new($args);
return $self;
}
=head1 METHODS
See 'Cache' for the API documentation.
=cut
sub entry {
my Cache::Null $self = shift;
my ($key) = @_;
return Cache::Null::Entry->new($self, $key);
}
sub purge {
#my Cache::Null $self = shift;
}
sub clear {
#my Cache::Null $self = shift;
}
sub count {
#my Cache::Null $self = shift;
return 0;
}
sub size {
#my Cache::Null $self = shift;
return 0;
}
# UTILITY METHODS
sub remove_oldest {
#my Cache::Null $self = shift;
return undef;
}
sub remove_stalest {
#my Cache::Null $self = shift;
return undef;
}
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: Null.pm,v 1.4 2006/01/31 15:23:58 caleishm Exp $
=cut
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