94 lines
1.7 KiB
Perl
94 lines
1.7 KiB
Perl
|
package Git::SVN::Memoize::YAML;
|
||
|
|
use warnings;
|
||
|
|
use strict;
|
||
|
|
use YAML::Any ();
|
||
|
|
|
||
|
|
# based on Memoize::Storable.
|
||
|
|
|
||
|
|
sub TIEHASH {
|
||
|
|
my $package = shift;
|
||
|
|
my $filename = shift;
|
||
|
|
my $truehash = (-e $filename) ? YAML::Any::LoadFile($filename) : {};
|
||
|
|
my $self = {FILENAME => $filename, H => $truehash};
|
||
|
|
bless $self => $package;
|
||
|
|
}
|
||
|
|
|
||
|
|
sub STORE {
|
||
|
|
my $self = shift;
|
||
|
|
$self->{H}{$_[0]} = $_[1];
|
||
|
|
}
|
||
|
|
|
||
|
|
sub FETCH {
|
||
|
|
my $self = shift;
|
||
|
|
$self->{H}{$_[0]};
|
||
|
|
}
|
||
|
|
|
||
|
|
sub EXISTS {
|
||
|
|
my $self = shift;
|
||
|
|
exists $self->{H}{$_[0]};
|
||
|
|
}
|
||
|
|
|
||
|
|
sub DESTROY {
|
||
|
|
my $self = shift;
|
||
|
|
YAML::Any::DumpFile($self->{FILENAME}, $self->{H});
|
||
|
|
}
|
||
|
|
|
||
|
|
sub SCALAR {
|
||
|
|
my $self = shift;
|
||
|
|
scalar(%{$self->{H}});
|
||
|
|
}
|
||
|
|
|
||
|
|
sub FIRSTKEY {
|
||
|
|
'Fake hash from Git::SVN::Memoize::YAML';
|
||
|
|
}
|
||
|
|
|
||
|
|
sub NEXTKEY {
|
||
|
|
undef;
|
||
|
|
}
|
||
|
|
|
||
|
|
1;
|
||
|
|
__END__
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
Git::SVN::Memoize::YAML - store Memoized data in YAML format
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
use Memoize;
|
||
|
|
use Git::SVN::Memoize::YAML;
|
||
|
|
|
||
|
|
tie my %cache => 'Git::SVN::Memoize::YAML', $filename;
|
||
|
|
memoize('slow_function', SCALAR_CACHE => [HASH => \%cache]);
|
||
|
|
slow_function(arguments);
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
This module provides a class that can be used to tie a hash to a
|
||
|
|
YAML file. The file is read when the hash is initialized and
|
||
|
|
rewritten when the hash is destroyed.
|
||
|
|
|
||
|
|
The intent is to allow L<Memoize> to back its cache with a file in
|
||
|
|
YAML format, just like L<Memoize::Storable> allows L<Memoize> to
|
||
|
|
back its cache with a file in Storable format. Unlike the Storable
|
||
|
|
format, the YAML format is platform-independent and fairly stable.
|
||
|
|
|
||
|
|
Carps on error.
|
||
|
|
|
||
|
|
=head1 DIAGNOSTICS
|
||
|
|
|
||
|
|
See L<YAML::Any>.
|
||
|
|
|
||
|
|
=head1 DEPENDENCIES
|
||
|
|
|
||
|
|
L<YAML::Any> from CPAN.
|
||
|
|
|
||
|
|
=head1 INCOMPATIBILITIES
|
||
|
|
|
||
|
|
None reported.
|
||
|
|
|
||
|
|
=head1 BUGS
|
||
|
|
|
||
|
|
The entire cache is read into a Perl hash when loading the file,
|
||
|
|
so this is not very scalable.
|