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Edit File: CacheMemory.pm
package DBI::Util::CacheMemory; # $Id: CacheMemory.pm 10314 2007-11-26 22:25:33Z Tim $ # # Copyright (c) 2007, Tim Bunce, Ireland # # You may distribute under the terms of either the GNU General Public # License or the Artistic License, as specified in the Perl README file. use strict; use warnings; =head1 NAME DBI::Util::CacheMemory - a very fast but very minimal subset of Cache::Memory =head1 DESCRIPTION Like Cache::Memory (part of the Cache distribution) but doesn't support any fancy features. This module aims to be a very fast compatible strict sub-set for simple cases, such as basic client-side caching for DBD::Gofer. Like Cache::Memory, and other caches in the Cache and Cache::Cache distributions, the data will remain in the cache until cleared, it expires, or the process dies. The cache object simply going out of scope will I<not> destroy the data. =head1 METHODS WITH CHANGES =head2 new All options except C<namespace> are ignored. =head2 set Doesn't support expiry. =head2 purge Same as clear() - deletes everything in the namespace. =head1 METHODS WITHOUT CHANGES =over =item clear =item count =item exists =item remove =back =head1 UNSUPPORTED METHODS If it's not listed above, it's not supported. =cut our $VERSION = "0.010315"; my %cache; sub new { my ($class, %options ) = @_; my $namespace = $options{namespace} ||= 'Default'; #$options{_cache} = \%cache; # can be handy for debugging/dumping my $self = bless \%options => $class; $cache{ $namespace } ||= {}; # init - ensure it exists return $self; } sub set { my ($self, $key, $value) = @_; $cache{ $self->{namespace} }->{$key} = $value; } sub get { my ($self, $key) = @_; return $cache{ $self->{namespace} }->{$key}; } sub exists { my ($self, $key) = @_; return exists $cache{ $self->{namespace} }->{$key}; } sub remove { my ($self, $key) = @_; return delete $cache{ $self->{namespace} }->{$key}; } sub purge { return shift->clear; } sub clear { $cache{ shift->{namespace} } = {}; } sub count { return scalar keys %{ $cache{ shift->{namespace} } }; } sub size { my $c = $cache{ shift->{namespace} }; my $size = 0; while ( my ($k,$v) = each %$c ) { $size += length($k) + length($v); } return $size; } 1;