This is the universal base class for Catalyst components
(Model/View/Controller).
-It provides you with a generic new() for instantiation through Catalyst's
+It provides you with a generic new() for component construction through Catalyst's
component loader with config() support and a process() method placeholder.
=cut
# TODO maybe this should be a ClassData option?
my $class = blessed($self) || $self;
my $meta = Class::MOP::get_metaclass_by_name($class);
- unless ($meta->has_package_symbol('$_config')) {
+ unless (${ $meta->get_or_add_package_symbol('$_config') }) {
# Call merge_hashes to ensure we deep copy the parent
# config onto the subclass
$self->_config( Catalyst::Utils::merge_hashes($config, {}) );
C<< my $component_instance = $component->COMPONENT($app, $arguments); >>
-If this method is present (as it is on all Catalyst::Component subclasses,
+If this method is present (as it is on all Catalyst::Component subclasses),
it is called by Catalyst during setup_components with the application class
as $app and any config entry on the application for this component (for example,
in the case of MyApp::Controller::Foo this would be
C<< __PACKAGE__->config >> hashref before calling C<< ->new >>
to instantiate the component.
-You can override it in your components to do custom instantiation, using
+You can override it in your components to do custom construction, using
something like this:
sub COMPONENT {
will be merged with any existing config settings. Each component in
a Catalyst application has its own config hash.
+The component's config hash is merged with any config entry on the
+application for this component and passed to C<new()> (as mentioned
+above at L</COMPONENT>). The common practice to access the merged
+config is to use a Moose attribute for each config entry on the
+receiving component.
+
=head2 $c->process()
This is the default method called on a Catalyst component in the dispatcher.