| 1 | package Memoize::ExpireFile; |
| 2 | |
| 3 | =head1 NAME |
| 4 | |
| 5 | Memoize::ExpireFile - test for Memoize expiration semantics |
| 6 | |
| 7 | =head1 DESCRIPTION |
| 8 | |
| 9 | See L<Memoize::Expire>. |
| 10 | |
| 11 | =cut |
| 12 | |
| 13 | $VERSION = 1.01; |
| 14 | use Carp; |
| 15 | |
| 16 | my $Zero = pack("N", 0); |
| 17 | |
| 18 | sub TIEHASH { |
| 19 | my ($package, %args) = @_; |
| 20 | my $cache = $args{HASH} || {}; |
| 21 | bless {ARGS => \%args, C => $cache} => $package; |
| 22 | } |
| 23 | |
| 24 | |
| 25 | sub STORE { |
| 26 | # print "Expiry manager STORE handler\n"; |
| 27 | my ($self, $key, $data) = @_; |
| 28 | my $cache = $self->{C}; |
| 29 | my $cur_date = pack("N", (stat($key))[9]); |
| 30 | $cache->{"C$key"} = $data; |
| 31 | $cache->{"T$key"} = $cur_date; |
| 32 | } |
| 33 | |
| 34 | sub FETCH { |
| 35 | my ($self, $key) = @_; |
| 36 | $self->{C}{"C$key"}; |
| 37 | } |
| 38 | |
| 39 | sub EXISTS { |
| 40 | # print "Expiry manager EXISTS handler\n"; |
| 41 | my ($self, $key) = @_; |
| 42 | my $cache_date = $self->{C}{"T$key"} || $Zero; |
| 43 | my $file_date = pack("N", (stat($key))[9]);# |
| 44 | # if ($self->{ARGS}{CHECK_DATE} && $old_date gt $cur_date) { |
| 45 | # return $self->{ARGS}{CHECK_DATE}->($key, $old_date, $cur_date); |
| 46 | # } |
| 47 | my $res = $cache_date ge $file_date; |
| 48 | # print $res ? "... still good\n" : "... expired\n"; |
| 49 | $res; |
| 50 | } |
| 51 | |
| 52 | 1; |