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c527660e |
1 | package MooseX::Runnable::Invocation; |
2 | use Moose; |
3 | use MooseX::Types -declare => ['RunnableClass']; |
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4 | use MooseX::Types::Moose qw(Str HashRef ArrayRef); |
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5 | use namespace::autoclean; |
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6 | |
7 | require Class::MOP; |
8 | |
9 | # we can't load the class until plugins are loaded, |
10 | # so we have to handle this outside of coerce |
11 | |
12 | subtype RunnableClass, |
13 | as Str, |
14 | where { $_ =~ /^[:A-Za-z_]+$/ }; |
15 | |
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16 | |
17 | # this class is just as runnable as any other, so I guess we should tag it |
18 | with 'MooseX::Runnable', 'MooseX::Object::Pluggable'; |
19 | |
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20 | has 'class' => ( |
21 | is => 'ro', |
22 | isa => RunnableClass, |
23 | required => 1, |
24 | ); |
25 | |
26 | has 'plugins' => ( |
27 | is => 'ro', |
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28 | isa => HashRef[ArrayRef[Str]], |
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29 | default => sub { [] }, |
30 | required => 1, |
31 | auto_deref => 1, |
32 | ); |
33 | |
34 | sub BUILD { |
35 | my $self = shift; |
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36 | $self->load_plugin($_) for keys %{$self->plugins}; |
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37 | } |
38 | |
39 | sub load_class { |
40 | my $self = shift; |
41 | my $class = $self->class; |
42 | |
43 | Class::MOP::load_class( $class ); |
44 | |
45 | confess 'We can only work with Moose classes with "meta" methods' |
46 | if !$class->can('meta'); |
47 | |
48 | my $meta = $class->meta; |
49 | |
50 | confess "The metaclass of $class is not a Moose::Meta::Class, it's $meta" |
51 | unless $meta->isa('Moose::Meta::Class'); |
52 | |
53 | confess 'MooseX::Runnable can only run classes tagged with '. |
54 | 'the MooseX::Runnable role' |
55 | unless $meta->does_role('MooseX::Runnable'); |
56 | |
57 | return $meta; |
58 | } |
59 | |
60 | sub apply_scheme { |
61 | my ($self, $class) = @_; |
62 | |
63 | my @schemes = grep { defined } map { |
64 | $self->_convert_role_to_scheme($_) |
65 | } $class->calculate_all_roles; |
66 | |
26041d41 |
67 | eval { |
68 | foreach my $scheme (@schemes) { |
69 | $scheme->apply($self); |
70 | } |
71 | }; |
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72 | } |
73 | |
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74 | |
75 | sub _convert_role_to_scheme { |
76 | my ($self, $role) = @_; |
77 | |
78 | my $name = $role->name; |
79 | return if $name =~ /\|/; |
80 | $name = "MooseX::Runnable::Invocation::Scheme::$name"; |
81 | |
82 | return eval { |
83 | Class::MOP::load_class($name); |
84 | warn "$name was loaded OK, but it's not a role!" and return |
85 | unless $name->meta->isa('Moose::Meta::Role'); |
86 | return $name->meta; |
87 | }; |
88 | } |
89 | |
90 | |
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91 | sub validate_class { |
92 | my ($self, $class) = @_; |
93 | |
94 | my @bad_attributes = map { $_->name } grep { |
95 | $_->is_required && $_->has_default || $_->has_builder |
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96 | } $class->get_all_attributes; |
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97 | |
98 | confess |
99 | 'By default, MooseX::Runnable calls the constructor with no'. |
100 | ' args, but that will result in an error for your class. You'. |
101 | ' need to provide a MooseX::Runnable::Invocation::Plugin or'. |
102 | ' ::Scheme for this class that will satisfy the requirements.'. |
103 | "\n". |
104 | "The class is @{[$class->name]}, and the required attributes are ". |
105 | join ', ', map { "'$_'" } @bad_attributes |
106 | if @bad_attributes; |
107 | |
108 | return; # return value is meaningless |
109 | } |
110 | |
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111 | sub create_instance { |
112 | my ($self, $class, @args) = @_; |
113 | return ($class->name->new, @args); |
114 | } |
115 | |
116 | sub start_application { |
117 | my $self = shift; |
118 | my $instance = shift; |
119 | my @args = @_; |
120 | |
121 | return $instance->run(@args); |
122 | } |
123 | |
124 | sub run { |
125 | my $self = shift; |
126 | my @args = @_; |
127 | |
128 | my $class = $self->load_class; |
129 | $self->apply_scheme($class); |
130 | $self->validate_class($class); |
131 | my ($instance, @more_args) = $self->create_instance($class, @args); |
132 | my $exit_code = $self->start_application($instance, @more_args); |
133 | return $exit_code; |
134 | } |
135 | |
136 | 1; |