1 package Catalyst::IOC::Container;
5 use Data::Visitor::Callback;
6 use Catalyst::Utils ();
7 use Devel::InnerPackage ();
8 use Hash::Util qw/lock_hash/;
9 use MooseX::Types::LoadableClass qw/ LoadableClass /;
11 use Catalyst::IOC::BlockInjection;
12 use Catalyst::IOC::ConstructorInjection;
13 use Module::Pluggable::Object ();
14 use namespace::autoclean;
16 extends 'Bread::Board::Container';
18 has config_local_suffix => (
27 default => sub { +{} },
36 has substitutions => (
39 default => sub { +{} },
42 has application_name => (
48 has sub_container_class => (
52 default => 'Catalyst::IOC::SubContainer',
54 new_sub_container => 'new',
59 my ( $self, $params ) = @_;
62 $self->${\"build_${_}_service"}
82 $self->add_sub_container(
83 $self->build_controller_subcontainer
86 # FIXME - the config should be merged at this point
87 my $config = $self->resolve( service => 'config' );
88 my $default_view = $params->{default_view} || $config->{default_view};
89 my $default_model = $params->{default_model} || $config->{default_model};
91 $self->add_sub_container(
92 $self->build_view_subcontainer(
93 default_component => $default_view,
97 $self->add_sub_container(
98 $self->build_model_subcontainer(
99 default_component => $default_model,
104 sub build_model_subcontainer {
107 return $self->new_sub_container( @_,
112 sub build_view_subcontainer {
115 return $self->new_sub_container( @_,
120 sub build_controller_subcontainer {
123 return $self->new_sub_container(
124 name => 'controller',
128 sub build_application_name_service {
131 return Bread::Board::Literal->new( name => 'application_name', value => $self->application_name );
134 sub build_driver_service {
137 return Bread::Board::Literal->new( name => 'driver', value => $self->driver );
140 sub build_file_service {
143 return Bread::Board::Literal->new( name => 'file', value => $self->file );
146 sub build_substitutions_service {
149 return Bread::Board::Literal->new( name => 'substitutions', value => $self->substitutions );
152 sub build_extensions_service {
155 return Bread::Board::BlockInjection->new(
156 lifecycle => 'Singleton',
157 name => 'extensions',
159 return \@{Config::Any->extensions};
164 sub build_prefix_service {
167 return Bread::Board::BlockInjection->new(
168 lifecycle => 'Singleton',
171 return Catalyst::Utils::appprefix( shift->param('application_name') );
173 dependencies => [ depends_on('application_name') ],
177 sub build_path_service {
180 return Bread::Board::BlockInjection->new(
181 lifecycle => 'Singleton',
186 return Catalyst::Utils::env_value( $s->param('application_name'), 'CONFIG' )
188 || $s->param('application_name')->path_to( $s->param('prefix') );
190 dependencies => [ depends_on('file'), depends_on('application_name'), depends_on('prefix') ],
194 sub build_config_service {
197 return Bread::Board::BlockInjection->new(
198 lifecycle => 'Singleton',
203 my $v = Data::Visitor::Callback->new(
205 return unless defined $_;
206 return $self->_config_substitutions( $s->param('application_name'), $s->param('substitutions'), $_ );
210 $v->visit( $s->param('raw_config') );
212 dependencies => [ depends_on('application_name'), depends_on('raw_config'), depends_on('substitutions') ],
216 sub build_raw_config_service {
219 return Bread::Board::BlockInjection->new(
220 lifecycle => 'Singleton',
221 name => 'raw_config',
225 my @global = @{$s->param('global_config')};
226 my @locals = @{$s->param('local_config')};
229 for my $cfg (@global, @locals) {
231 $config = Catalyst::Utils::merge_hashes( $config, $cfg->{$_} );
236 dependencies => [ depends_on('global_config'), depends_on('local_config') ],
240 sub build_global_files_service {
243 return Bread::Board::BlockInjection->new(
244 lifecycle => 'Singleton',
245 name => 'global_files',
249 my ( $path, $extension ) = @{$s->param('config_path')};
251 my @extensions = @{$s->param('extensions')};
255 die "Unable to handle files with the extension '${extension}'" unless grep { $_ eq $extension } @extensions;
258 @files = map { "$path.$_" } @extensions;
262 dependencies => [ depends_on('extensions'), depends_on('config_path') ],
266 sub build_local_files_service {
269 return Bread::Board::BlockInjection->new(
270 lifecycle => 'Singleton',
271 name => 'local_files',
275 my ( $path, $extension ) = @{$s->param('config_path')};
276 my $suffix = $s->param('config_local_suffix');
278 my @extensions = @{$s->param('extensions')};
282 die "Unable to handle files with the extension '${extension}'" unless grep { $_ eq $extension } @extensions;
283 $path =~ s{\.$extension}{_$suffix.$extension};
286 @files = map { "${path}_${suffix}.$_" } @extensions;
290 dependencies => [ depends_on('extensions'), depends_on('config_path'), depends_on('config_local_suffix') ],
294 sub build_global_config_service {
297 return Bread::Board::BlockInjection->new(
298 lifecycle => 'Singleton',
299 name => 'global_config',
303 return Config::Any->load_files({
304 files => $s->param('global_files'),
305 filter => \&_fix_syntax,
307 driver_args => $s->param('driver'),
310 dependencies => [ depends_on('global_files') ],
314 sub build_local_config_service {
317 return Bread::Board::BlockInjection->new(
318 lifecycle => 'Singleton',
319 name => 'local_config',
323 return Config::Any->load_files({
324 files => $s->param('local_files'),
325 filter => \&_fix_syntax,
327 driver_args => $s->param('driver'),
330 dependencies => [ depends_on('local_files') ],
334 sub build_config_path_service {
337 return Bread::Board::BlockInjection->new(
338 lifecycle => 'Singleton',
339 name => 'config_path',
343 my $path = $s->param('path');
344 my $prefix = $s->param('prefix');
346 my ( $extension ) = ( $path =~ m{\.(.{1,4})$} );
349 $path =~ s{[\/\\]$}{};
353 return [ $path, $extension ];
355 dependencies => [ depends_on('prefix'), depends_on('path') ],
359 sub build_config_local_suffix_service {
362 return Bread::Board::BlockInjection->new(
363 lifecycle => 'Singleton',
364 name => 'config_local_suffix',
367 my $suffix = Catalyst::Utils::env_value( $s->param('application_name'), 'CONFIG_LOCAL_SUFFIX' ) || $self->config_local_suffix;
371 dependencies => [ depends_on('application_name') ],
375 sub build_locate_components_service {
378 return Bread::Board::BlockInjection->new(
379 lifecycle => 'Singleton',
380 name => 'locate_components',
383 my $class = $s->param('application_name');
384 my $config = $s->param('config')->{ setup_components };
386 Catalyst::Exception->throw(
387 qq{You are using search_extra config option. That option is\n} .
388 qq{deprecated, please refer to the documentation for\n} .
389 qq{other ways of achieving the same results.\n}
390 ) if delete $config->{ search_extra };
392 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
394 my $locator = Module::Pluggable::Object->new(
395 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
399 # XXX think about ditching this sort entirely
400 my @comps = sort { length $a <=> length $b } $locator->plugins;
404 dependencies => [ depends_on('application_name'), depends_on('config') ],
408 sub setup_components {
410 my $class = $self->resolve( service => 'application_name' );
411 my @comps = @{ $self->resolve( service => 'locate_components' ) };
412 my %comps = map { $_ => 1 } @comps;
413 my $deprecatedcatalyst_component_names = 0;
415 for my $component ( @comps ) {
417 # We pass ignore_loaded here so that overlay files for (e.g.)
418 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
419 # we know M::P::O found a file on disk so this is safe
421 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
424 for my $component (@comps) {
425 $self->add_component( $component, $class );
426 # FIXME - $instance->expand_modules() is broken
427 my @expanded_components = $self->expand_component_module( $component );
430 !$deprecatedcatalyst_component_names &&
431 ($deprecatedcatalyst_component_names = $component =~ m/::[CMV]::/) ||
432 ($deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @expanded_components)
434 # FIXME - should I be calling warn here?
435 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
436 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
440 for my $component (@expanded_components) {
441 $self->add_component( $component, $class )
442 unless $comps{$component};
446 $self->get_sub_container('model')->make_single_default;
447 $self->get_sub_container('view')->make_single_default;
454 prefix => $_ eq 'Component' ? '' : $_ . '::',
455 values => delete $config->{ lc $_ } || delete $config->{ $_ }
457 grep { ref $config->{ lc $_ } || ref $config->{ $_ } }
458 qw( Component Model M View V Controller C Plugin )
461 foreach my $comp ( @components ) {
462 my $prefix = $comp->{ prefix };
463 foreach my $element ( keys %{ $comp->{ values } } ) {
464 $config->{ "$prefix$element" } = $comp->{ values }->{ $element };
469 sub _config_substitutions {
470 my ( $self, $name, $subs, $arg ) = @_;
472 $subs->{ HOME } ||= sub { shift->path_to( '' ); };
476 if (! defined($ENV{$v})) {
477 Catalyst::Exception->throw( message =>
478 "Missing environment variable: $v" );
484 $subs->{ path_to } ||= sub { shift->path_to( @_ ); };
485 $subs->{ literal } ||= sub { return $_[ 1 ]; };
486 my $subsre = join( '|', keys %$subs );
488 $arg =~ s{__($subsre)(?:\((.+?)\))?__}{ $subs->{ $1 }->( $name, $2 ? split( /,/, $2 ) : () ) }eg;
492 sub get_component_from_sub_container {
493 my ( $self, $sub_container_name, $name, $c, @args ) = @_;
495 my $sub_container = $self->get_sub_container( $sub_container_name );
498 my $default = $sub_container->default_component;
500 return $sub_container->get_component( $default, $c, @args )
501 if $default && $sub_container->has_service( $default );
503 # FIXME - should I be calling $c->log->warn here?
504 # this is never a controller, so this is safe
505 $c->log->warn( "Calling \$c->$sub_container_name() is not supported unless you specify one of:" );
506 $c->log->warn( "* \$c->config(default_$sub_container_name => 'the name of the default $sub_container_name to use')" );
507 $c->log->warn( "* \$c->stash->{current_$sub_container_name} # the name of the view to use for this request" );
508 $c->log->warn( "* \$c->stash->{current_${sub_container_name}_instance} # the instance of the $sub_container_name to use for this request" );
513 return $sub_container->get_component_regexp( $name, $c, @args )
516 return $sub_container->get_component( $name, $c, @args )
517 if $sub_container->has_service( $name );
520 "Attempted to use $sub_container_name '$name', " .
521 "but it does not exist"
528 my ( $self, $component, $c, @args ) = @_;
529 my ( $type, $name ) = _get_component_type_name($component);
532 return $self->get_component_from_sub_container(
533 $type, $name, $c, @args
536 my $query = ref $component
541 for my $subcontainer_name (qw/model view controller/) {
542 my $subcontainer = $self->get_sub_container( $subcontainer_name );
543 my @components = $subcontainer->get_service_list;
544 @result = grep { m{$component} } @components;
546 return map { $subcontainer->get_component( $_, $c, @args ) } @result
550 # FIXME - I guess I shouldn't be calling $c->components here
551 # one last search for things like $c->comp(qr/::M::/)
552 @result = $self->find_component_regexp(
553 $c->components, $component, $c, @args
554 ) if !@result and ref $component;
556 # it expects an empty list on failed searches
560 sub find_component_regexp {
561 my ( $self, $components, $component, @args ) = @_;
564 my @components = grep { m{$component} } keys %{ $components };
567 my ($type, $name) = _get_component_type_name($_);
569 push @result, $self->get_component_from_sub_container(
577 # FIXME sorry for the name again :)
578 sub get_components_types {
582 for my $sub_container_name (qw/model view controller/) {
583 my $sub_container = $self->get_sub_container($sub_container_name);
584 for my $service ( $sub_container->get_service_list ) {
585 my $comp = $self->resolve(service => $service);
586 my $compname = ref $comp || $comp;
587 my $type = ref $comp ? 'instance' : 'class';
588 push @comps_types, [ $compname, $type ];
595 sub get_all_components {
600 map { $_ => $self->get_sub_container($_) } qw(model view controller)
603 for my $container (keys %$containers) {
604 for my $component ($containers->{$container}->get_service_list) {
605 my $comp = $containers->{$container}->resolve(
606 service => $component
608 my $comp_name = ref $comp || $comp;
609 $components{$comp_name} = $comp;
613 return lock_hash %components;
617 my ( $self, $component, $class ) = @_;
618 my ( $type, $name ) = _get_component_type_name($component);
619 my $suffix = Catalyst::Utils::class2classsuffix( $component );
623 $self->get_sub_container($type)->add_service(
624 Catalyst::IOC::ConstructorInjection->new(
625 lifecycle => 'Singleton', # FIXME?
629 application_name => Bread::Board::Dependency->new( service_path => '/application_name' ),
630 config => Bread::Board::Dependency->new( service_path => '/config' ),
639 # FIXME: should this sub exist?
640 # should it be moved to Catalyst::Utils,
641 # or replaced by something already existing there?
642 sub _get_component_type_name {
643 my ( $component ) = @_;
645 my @parts = split /::/, $component;
647 while (my $type = shift @parts) {
648 return ('controller', join '::', @parts)
649 if $type =~ /^(c|controller)$/i;
651 return ('model', join '::', @parts)
652 if $type =~ /^(m|model)$/i;
654 return ('view', join '::', @parts)
655 if $type =~ /^(v|view)$/i;
658 return (undef, $component);
661 # FIXME ugly and temporary
662 # Just moved it here the way it was, so we can work on it here in the container
663 sub setup_component {
664 my ( $self, $component, $class ) = @_;
666 unless ( $component->can( 'COMPONENT' ) ) {
670 # FIXME I know this isn't the "Dependency Injection" way of doing things,
672 my $suffix = Catalyst::Utils::class2classsuffix( $component );
673 my $config = $self->resolve(service => 'config')->{ $suffix } || {};
675 # Stash catalyst_component_name in the config here, so that custom COMPONENT
676 # methods also pass it. local to avoid pointlessly shitting in config
677 # for the debug screen, as $component is already the key name.
678 local $config->{catalyst_component_name} = $component;
680 my $instance = eval { $component->COMPONENT( $class, $config ); };
682 if ( my $error = $@ ) {
684 Catalyst::Exception->throw(
685 message => qq/Couldn't instantiate component "$component", "$error"/
688 elsif (!blessed $instance) {
689 my $metaclass = Moose::Util::find_meta($component);
690 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
691 my $component_method_from = $method_meta->associated_metaclass->name;
692 my $value = defined($instance) ? $instance : 'undef';
693 Catalyst::Exception->throw(
695 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
702 sub expand_component_module {
703 my ( $class, $module ) = @_;
704 return Devel::InnerPackage::list_packages( $module );
715 Catalyst::Container - IOC for Catalyst components
725 =head2 build_model_subcontainer
727 Container that stores all models.
729 =head2 build_view_subcontainer
731 Container that stores all views.
733 =head2 build_controller_subcontainer
735 Container that stores all controllers.
739 =head2 build_application_name_service
741 Name of the application (such as MyApp).
743 =head2 build_driver_service
745 Config options passed directly to the driver being used.
747 =head2 build_file_service
751 =head2 build_substitutions_service
753 Executes all the substitutions in config. See L</_config_substitutions> method.
755 =head2 build_extensions_service
757 =head2 build_prefix_service
759 =head2 build_path_service
761 =head2 build_config_service
763 =head2 build_raw_config_service
765 =head2 build_global_files_service
767 =head2 build_local_files_service
769 =head2 build_global_config_service
771 =head2 build_local_config_service
773 =head2 build_config_path_service
775 =head2 build_config_local_suffix_service
777 Determines the suffix of files used to override the main config. By default
778 this value is C<local>, which will load C<myapp_local.conf>. The suffix can
779 be specified in the following order of preference:
783 =item * C<$ENV{ MYAPP_CONFIG_LOCAL_SUFFIX }>
785 =item * C<$ENV{ CATALYST_CONFIG_LOCAL_SUFFIX }>
789 The first one of these values found replaces the default of C<local> in the
790 name of the local config file to be loaded.
792 For example, if C< $ENV{ MYAPP_CONFIG_LOCAL_SUFFIX }> is set to C<testing>,
793 ConfigLoader will try and load C<myapp_testing.conf> instead of
796 =head2 get_component_from_sub_container($sub_container, $name, $c, @args)
798 Looks for components in a given subcontainer (such as controller, model or view), and returns the searched component. If $name is undef, it returns the default component (such as default_view, if $sub_container is 'view'). If $name is a regexp, it returns an array of matching components. Otherwise, it looks for the component with name $name.
800 =head2 get_components_types
802 =head2 get_all_components
804 Fetches all the components, in each of the sub_containers model, view and controller, and returns a readonly hash. The keys are the class names, and the values are the blessed objects. This is what is returned by $c->components.
808 Adds a component to the appropriate subcontainer. The subcontainer is guessed by the component name given.
810 =head2 find_component
812 Searches for components in all containers. If $component is the full class name, the subcontainer is guessed, and it gets the searched component in there. Otherwise, it looks for a component with that name in all subcontainers. If $component is a regexp, it calls the method below, find_component_regexp, and matches all components against that regexp.
814 =head2 find_component_regexp
816 Finds components that match a given regexp. Used internally, by find_component.
818 =head2 setup_component
822 =head2 _config_substitutions
824 This method substitutes macros found with calls to a function. There are a
825 number of default macros:
829 =item * C<__HOME__> - replaced with C<$c-E<gt>path_to('')>
831 =item * C<__ENV(foo)__> - replaced with the value of C<$ENV{foo}>
833 =item * C<__path_to(foo/bar)__> - replaced with C<$c-E<gt>path_to('foo/bar')>
835 =item * C<__literal(__FOO__)__> - leaves __FOO__ alone (allows you to use
836 C<__DATA__> as a config value, for example)
840 The parameter list is split on comma (C<,>). You can override this method to
841 do your own string munging, or you can define your own macros in
842 C<MyApp-E<gt>config-E<gt>{ 'Plugin::ConfigLoader' }-E<gt>{ substitutions }>.
845 MyApp->config->{ 'Plugin::ConfigLoader' }->{ substitutions } = {
846 baz => sub { my $c = shift; qux( @_ ); }
849 The above will respond to C<__baz(x,y)__> in config strings.
851 =head2 $c->expand_component_module( $component, $setup_component_config )
853 Components found by C<locate_components> will be passed to this method, which
854 is expected to return a list of component (package) names to be set up.
856 =head2 build_locate_components_service
858 This method is meant to provide a list of component modules that should be
859 setup for the application. By default, it will use L<Module::Pluggable>.
861 Specify a C<setup_components> config option to pass additional options directly
862 to L<Module::Pluggable>.
864 =head2 build_setup_components_service
868 Catalyst Contributors, see Catalyst.pm
872 This library is free software. You can redistribute it and/or modify it under
873 the same terms as Perl itself.