## GSOC
-### Next large steps, planned:
-
-For all components that have been discovered, in whatever way, we create a service:
- - that's a catalyst component service
- - which is basically just a constructor injection
- - except the constructor name is COMPONENT
- - and we're "implicitly" passing along some constructor args
- - Lifecycle => Singleton
-
- - We make a 'components' sub container in the main container.
- - This gets the ConstructorInjection COMPONENT services, as model_Foo.
- - Lifecycle of these services is Singleton
- - This simplifies the code for MyApp->components, as it need only list one sub-container
-
- - We create a second service (depending on the first one) for ACCEPT_CONTEXT
- - This has a custom service which calls ACCEPT_CONTEXT when the instance is fetched
- - Not Singleton lifecycle
-
- Note - ACCEPT_CONTEXT can be called on app values - if you have a Model::Foo, with an ACCEPT_CONTEXT
- and you call MyApp->model('Foo') then ACCEPT_CONTEXT gets invoked with a $c of 'MyApp' (this is not\
- the normal case, but we need to preserve for compat)
-
### Next steps - less planned:
- Creating service()-like sugar for component
- Test cases for extending the container in an application.
- Using the sugar added in the previous item
- Test when Model::Foo depends_on Model::Bar
-
- a) configure additional services in that container
- - super simple container $default_container => as { more services };
- class MyApp::Container extends Catalyst::Container {
- use Bread::Board; # Or our own sugar?
- method BUILD { container $self => as {
- service model => ...; # some constructor injection to MyApp::Model or something
- container Model => as {
- component Foo => (dependencies => ['/model']); # As per default!
- component Bar => (dependencies => ['/model/Foo']); # Magic!
- };
- # Note - implementation of BB may need to be changed to support making sure existing
- # services actually get overridden. not sure how the default container behaves when doing that
- # above code would build the constructor injection as it currently does,
- # defaulting to the class name in the right namespace as declared by the surrounding container
- # as well as adding using the catalyst-specific service class
- } }
- };
-
- let's consider the usage patterns we actually want to enable by doing the whole B::B thing
- what happens if i make the "per-app" service for a component life only for the duration of the request?
- or be instanciated every time i look up the component?
- (or scoping it per session, or having a block injection, or something)
-
- say you override the app service to be per-request
- now the wrapper for the per-request variant doesn't make sense anymore. does it?
- because you're only overriding one half of what has been generated automatically
-
- ah, so you have basically ended up with getting a request scoped thing to be used to construct a request scoped thing, which is pointless? Would/could you not just override the
- service which is actually getting looked up instead, and make it not depend on the auto-generated per-app scope service, which will then just never be built?
-
- yes, you could. but then you'd have to be aware of the distinction
- which is what i hoped to be a barely visible backcompat thing
- but which i'm afraid it won't be if we go for two actual separate services
-
- what stops the sugar we give from not just making you specify the lifecycle, and giving you the obvious name / wiring?
- i.e. everything looks like 'Foo', so you don't have to know COMPONENT/Foo exists
-
- my hopes of not needing any sugar at all, i guess
-
- only a couple of new lifecycles to be registered with the container - ??
-
+ - Test for component Foo => ( lifecycle => 'Singleton', class => 'My::External::Class', dependencies => { config => depends_on("config") } )
+ - Fix ^^ so that you can get your component's namespaced config nicely.
+
+ - Tests for using the container outside of Catalyst
+ - Custom container which adds some (very simple) services which are initialized from
+ the application config file (note plain services, not components)
+ - Depend on (and test) these inside Catalyst
+ - Test loading container outside Catalyst, and these services working
+ - Test Catalyst / MyApp is not loaded
+
+#### Extending my app, notes
+
+Basically try to implement something like this (starting out without the sugar!), and see how it breaks
+and what needs to be done to fix it!
+
+##### Eventual syntax
+
+package MyApp::Container;
+use Catalyst::IOC;
+
+ container $self, as {
+ container model => as {
+ component Foo => (); # As per default!
+ component Bar => (dependencies => ['/model/Foo']); # Magic!
+ component Baz => ( lifecycle => 'InstancePerContext );
+ component Quux => ( lifecycle => 'Singleton' ); # ACCEPT_CONTEXT not called
+ # Catalyst::Model::Adaptor example
+ conponent Fnar => ( lifecycle => 'Singleton', class => 'My::External::Class', dependencies => { config => depends_on('config')} );
+ # ^^ FIXME - gets whole config, not Model::Foo
+ # There should be a 'nice' way to get the 'standard' config
+ };
+ # Note - implementation of BB may need to be changed to support making sure existing
+ # services actually get overridden. not sure how the default container behaves when doing that
+ # above code would build the constructor injection as it currently does,
+ # defaulting to the class name in the right namespace as declared by the surrounding container
+ # as well as adding using the catalyst-specific service class
+ };
+
+1;
+
+##### To start with
+
+package MyApp::Container;
+use Moose;
+
+extends 'Catalyst::Container;
+
+after BUILD => sub {
+ my $self = shift;
+ my $model_container = $self->get_sub_container('model');
+ my $service = Catalyst::IOC::ConstructorInjection->new(
+ name => 'Baz',
+ class => 'MyApp::Model::Baz',
+ dependencies => [
+ depends_on( '/application_name' ),
+ depends_on( '/config' ),
+ depends_on( '/model/Foo' ),
+ ],
+ lifecycle => 'InstancePerContext',
+ );
+ $model_container->add_service( 'Foo', $service );
+};
### To polish off / t0m review
- - + $class->container->get_sub_container('model')->make_single_default;
- + $class->container->get_sub_container('view')->make_single_default;
-
- get_components_names_types
-
- locate_components
-
- +# FIXME - t0m, how do you feel about this name?
- +# also, do you think I should draw it here, or just return the data structure?
- +sub get_components_names_types {
-
- + MyApp->config->{ 'Plugin::ConfigLoader' }->{ substitutions } = {
-
- +# FIXME - just till I understand how it's supposed to be done
- +# Made this so that COMPONENT is executed once,
- +# and ACCEPT_CONTEXT every call.
- +has instance => (
- + is => 'rw',
-
- # This is ok??
- +my $applevel_config = TestAppContainer->container->resolve(service => 'config')->{applevel_config};
- +__PACKAGE__->config(applevel_config => 'foo');
-
+ locate_components service vs setup_components method
+ - can we be more lazy?
+ - should setup_components be a service that things like the ->component lookup
+ can depend on?
- accept_context_args - where does this come from?
+ - my $accept_context_args = $self->param('accept_context_args');
+ + my $accept_context_args = $params{accept_context_args};
+ ^^ This (may be) wrong! I am thinking the service should be allowed to mangle the
+ accept_context args, no?
+ Without this change, the user could make a custom service which mangled the param, and use
+ Catalyst/IOC/Service/WithAcceptContext.pm, with this change, that module will always see the
+ un-mangled version?? However, without this change, shit doesn't work...
### Known issues
- expand_component_module
+ - People wrapping locate_components in Catalyst.pm
projects / catagits/Catalyst-Runtime.git / blobdiff