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White Paper on Storage Considerations for Accelerating Databases
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MooseX::Storage::Engine::Trait::OnlyWhenBuilt(3) User Contributed Perl Documentation MooseX::Storage::Engine::Trait::OnlyWhenBuilt(3) 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. perl v5.16.2 2009-08-11 MooseX::Storage::Engine::Trait::OnlyWhenBuilt(3)
