NAME

Cache::Keys::DSL - Declare cache key generator by DSL

SYNOPSIS

package MyProj::Keys;
use Cache::Keys::DSL base_version => 0.01; # base_version is optional

key 'all_items';
keygen 'item';

keygen 'user';

keygen with_version user_item => 0.01, sub {
    my ($user, $item) = @_;
    return $user->{id}, $item->{id};
};

1;

package MyProj;
use MyProj::Keys qw/key_for_all_items gen_key_for_item gen_key_for_user gen_key_for_user_item/;

sub search_all_items {
    my $key = key_for_all_items();
    $cache->get_or_set($key => sub { $dbh->selectall_arrayref('SELECT * FROM item ORDER BY id', { Slice => {} }) });
}

sub fetch_item_by_id {
    my $item_id = shift;
    my $key = gen_key_for_item($item_id);
    $cache->get_or_set($key => sub { $dbh->selectrow_hashref('SELECT * FROM item WHERE id = ?', undef, $item_id) });
}

sub fetch_user_by_id {
    my $user_id = shift;
    my $key = gen_key_for_user($user_id);
    $cache->get_or_set($key => sub { $dbh->selectrow_hashref('SELECT * FROM user WHERE id = ?', undef, $user_id) });
}

sub fetch_user_item {
    my ($user, $item) = @_;
    my $key = gen_key_for_user_item($user, $item);
    $cache->get_or_set($key => sub {
        $dbh->selectrow_hashref('SELECT * FROM user_item WHERE user_id = ? AND item_id = ?', undef, $user->{id}, $item->{id});
    });
}

DESCRIPTION

Cache::Keys::DSL provides DSL for declaring cache key.

FUNCTIONS

• key $name

  For declaring static key. It generates exportable constant subroutine named key_for_$name.

• keygen $name

  For declaring dynamic key. It generates exportable subroutine named gen_key_for_$name.

• with_version $name, $version

  For declaring cache version.

LICENSE

Copyright (C) karupanerura.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

karupanerura <karupa@cpan.org>