NAME¶
MooseX::Storage::Engine::Trait::OnlyWhenBuilt - An engine trait to bypass
serialization
SYNOPSIS¶
{ package Point;
use Moose;
use MooseX::Storage;
with Storage( traits => [qw|OnlyWhenBuilt|] );
has 'x' => (is => 'rw', lazy_build => 1 );
has 'y' => (is => 'rw', lazy_build => 1 );
has 'z' => (is => 'rw', builder => '_build_z' );
sub _build_x { 3 }
sub _build_y { expensive_computation() }
sub _build_z { 3 }
}
my $p = Point->new( 'x' => 4 );
# the result of ->pack will contain:
# { x => 4, z => 3 }
$p->pack;
DESCRIPTION¶
Sometimes you don't want a particular attribute to be part of the serialization
if it has not been built yet. If you invoke "Storage()" as outlined
in the "Synopsis", only attributes that have been built (ie, where
the predicate returns 'true') will be serialized. This avoids any potentially
expensive computations.
This trait is applied to an instance of MooseX::Storage::Engine, for the
user-visible version shown in the SYNOPSIS, see
MooseX::Storage::Traits::OnlyWhenBuilt
METHODS¶
Introspection¶
- meta
BUGS¶
All complex software has bugs lurking in it, and this module is no exception. If
you find a bug please either email me, or add the bug to cpan-RT.
AUTHOR¶
Stevan Little <stevan.little@iinteractive.com>
COPYRIGHT AND LICENSE¶
Copyright 2007-2008 by Infinity Interactive, Inc.
<
http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.