You're doing too much work, when you can just use Memoize and take advantage of the Memoize::Storable capability.
package Audio::Scrobbler::SimilarArtists;
use strict;
use Memoize;
my %cache;
sub new {
my ($class, %parameters) = @_;
my $self = bless ({}, ref ($class) || $class);
my %options = (
min_match => 75,
cache_time => '1 week',
cache_file => '/tmp/audioscrobbler.cache',
%parameters,
);
$self->{'_options'} = \%options;
$self->{cache} = \%cache;
tie %{ $self->{cache} } =>
'GDBM_File', $self->{_options}->{cache_file}, O_RDWR|O_CREAT, 066
+6;
memoize 'lookup', SCALAR_CACHE => [HASH => \%cache];
return $self;
}
sub lookup {
# same as above, but without caching code: memoize handles that.
}
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