1MooseX::Storage::EngineU:s:eTrraCiotn:tM:roOionbslueytXWe:hd:eSnPtBeourrilalgtDe(o:3c:)uEmnegnitnaet:i:oTnrait::OnlyWhenBuilt(3)
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NAME

6       MooseX::Storage::Engine::Trait::OnlyWhenBuilt - An engine trait to
7       bypass serialization
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SYNOPSIS

10           {   package Point;
11               use Moose;
12               use MooseX::Storage;
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14               with Storage( traits => [qw|OnlyWhenBuilt|] );
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16               has 'x' => (is => 'rw', lazy_build => 1 );
17               has 'y' => (is => 'rw', lazy_build => 1 );
18               has 'z' => (is => 'rw', builder => '_build_z' );
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20               sub _build_x { 3 }
21               sub _build_y { expensive_computation() }
22               sub _build_z { 3 }
23           }
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25           my $p = Point->new( 'x' => 4 );
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27           # the result of ->pack will contain:
28           # { x => 4, z => 3 }
29           $p->pack;
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DESCRIPTION

32       Sometimes you don't want a particular attribute to be part of the
33       serialization if it has not been built yet. If you invoke "Storage()"
34       as outlined in the "Synopsis", only attributes that have been built
35       (ie, where the predicate returns 'true') will be serialized.  This
36       avoids any potentially expensive computations.
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38       This trait is applied to an instance of MooseX::Storage::Engine, for
39       the user-visible version shown in the SYNOPSIS, see
40       MooseX::Storage::Traits::OnlyWhenBuilt
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METHODS

43   Introspection
44       meta
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BUGS

47       All complex software has bugs lurking in it, and this module is no
48       exception. If you find a bug please either email me, or add the bug to
49       cpan-RT.
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AUTHOR

52       Stevan Little <stevan.little@iinteractive.com>
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55       Copyright 2007-2008 by Infinity Interactive, Inc.
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57       <http://www.iinteractive.com>
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59       This library is free software; you can redistribute it and/or modify it
60       under the same terms as Perl itself.
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64perl v5.12.0                  Moos2e0X0:9:-S0t7o-r1a3ge::Engine::Trait::OnlyWhenBuilt(3)
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