/usr/share/perl5/Cache/NullCache.pm is in libcache-cache-perl 1.08-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# $Id: NullCache.pm,v 1.7 2002/07/18 06:15:18 dclinton Exp $
# Copyright (C) 2001 Jay Sachs, 2002 DeWitt Clinton All Rights Reserved
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either expressed or
# implied. See the License for the specific language governing
# rights and limitations under the License.
######################################################################
package Cache::NullCache;
use strict;
use vars qw( @ISA );
use Cache::BaseCache;
use Cache::Cache qw( $EXPIRES_NOW );
@ISA = qw ( Cache::BaseCache );
sub Clear
{
}
sub Purge
{
}
sub Size
{
return 0;
}
sub new
{
my ( $proto ) = @_;
return bless( {}, ref( $proto ) || $proto );
}
sub clear
{
}
sub get
{
return undef;
}
sub get_object
{
return undef;
}
sub purge
{
}
sub remove
{
}
sub set
{
}
sub set_object
{
}
sub size
{
return 0;
}
sub get_default_expires_in
{
return $EXPIRES_NOW;
}
sub get_keys
{
return ( );
}
sub get_identifiers
{
warn( "get_identifiers has been marked deprepricated. use get_keys" );
return ( );
}
sub get_auto_purge_interval
{
return 0;
}
sub set_auto_purge_interval
{
}
sub get_auto_purge_on_set
{
return 0;
}
sub set_auto_purge_on_set
{
}
sub get_auto_purge_on_get
{
return 0;
}
sub set_auto_purge_on_get
{
}
__END__
=pod
=head1 NAME
Cache::NullCache -- implements the Cache interface.
=head1 DESCRIPTION
The NullCache class implements the Cache::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 to get and get_object will return undef.
=head1 SYNOPSIS
use Cache::NullCache;
my $cache = new Cache::NullCache( );
See Cache::Cache for the usage synopsis.
=head1 METHODS
See Cache::Cache for the API documentation.
=head1 OPTIONS
See Cache::Cache for standard options.
=head1 PROPERTIES
See Cache::Cache for default properties.
=head1 SEE ALSO
Cache::Cache
=head1 AUTHOR
Original author: Jay Sachs
Last author: $Author: dclinton $
Copyright (C) 2001 Jay Sachs, 2002 DeWitt Clinton
=cut
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