| 1 | package Memoize::Storable; |
| 2 | |
| 3 | =head1 NAME |
| 4 | |
| 5 | Memoize::Storable - store Memoized data in Storable database |
| 6 | |
| 7 | =head1 DESCRIPTION |
| 8 | |
| 9 | See L<Memoize>. |
| 10 | |
| 11 | =cut |
| 12 | |
| 13 | use Storable (); |
| 14 | $VERSION = 0.65; |
| 15 | $Verbose = 0; |
| 16 | |
| 17 | sub TIEHASH { |
| 18 | require Carp if $Verbose; |
| 19 | my $package = shift; |
| 20 | my $filename = shift; |
| 21 | my $truehash = (-e $filename) ? Storable::retrieve($filename) : {}; |
| 22 | my %options; |
| 23 | print STDERR "Memoize::Storable::TIEHASH($filename, @_)\n" if $Verbose; |
| 24 | @options{@_} = (); |
| 25 | my $self = |
| 26 | {FILENAME => $filename, |
| 27 | H => $truehash, |
| 28 | OPTIONS => \%options |
| 29 | }; |
| 30 | bless $self => $package; |
| 31 | } |
| 32 | |
| 33 | sub STORE { |
| 34 | require Carp if $Verbose; |
| 35 | my $self = shift; |
| 36 | print STDERR "Memoize::Storable::STORE(@_)\n" if $Verbose; |
| 37 | $self->{H}{$_[0]} = $_[1]; |
| 38 | } |
| 39 | |
| 40 | sub FETCH { |
| 41 | require Carp if $Verbose; |
| 42 | my $self = shift; |
| 43 | print STDERR "Memoize::Storable::FETCH(@_)\n" if $Verbose; |
| 44 | $self->{H}{$_[0]}; |
| 45 | } |
| 46 | |
| 47 | sub EXISTS { |
| 48 | require Carp if $Verbose; |
| 49 | my $self = shift; |
| 50 | print STDERR "Memoize::Storable::EXISTS(@_)\n" if $Verbose; |
| 51 | exists $self->{H}{$_[0]}; |
| 52 | } |
| 53 | |
| 54 | sub DESTROY { |
| 55 | require Carp if $Verbose; |
| 56 | my $self= shift; |
| 57 | print STDERR "Memoize::Storable::DESTROY(@_)\n" if $Verbose; |
| 58 | if ($self->{OPTIONS}{'nstore'}) { |
| 59 | Storable::nstore($self->{H}, $self->{FILENAME}); |
| 60 | } else { |
| 61 | Storable::store($self->{H}, $self->{FILENAME}); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | sub FIRSTKEY { |
| 66 | 'Fake hash from Memoize::Storable'; |
| 67 | } |
| 68 | |
| 69 | sub NEXTKEY { |
| 70 | undef; |
| 71 | } |
| 72 | 1; |