Awesome

What?

FtwFacility is a facility for the excellent Castle Windsor that addresses one of its few shortcomings: The nifty IHandlerSelector and IHandlersFilter hooks are not registered in the container, they are instances provided to the container at registration time, and thus cannot take advantage of autowiring, lifestyle management, etc.

Therefore, FtwFacility goes on and adds to the kernel one single implementation of IHandlerSelector and IHandlersFilter that has access to the kernel, allowing it to pull handler selectors and handler filters from the container.

With FtwFacility, you can register ISelectHandlerFor<TService> and IFilterHandlersFor<TService> implementations and have them resolved and called whenever TService is either Resolved or ResolveAlld.

Why?

Like I said: Your usual handler selector/filter is not pulled from the container. With this facility, you can hook into the same places with components from the container.

How?

Reference F.T.Windsor from your project and

var container = new WindsorContainer();

container.AddFacility<FtwFacility>();

before adding any selectors to the container.

From then on, you can do this:

container.Register(Component.For<ISelectHandlerFor<ISomeService>>().ImplementedBy<SomeServiceSelector>(),
                   Component.For<ISomeService>().ImplementedBy<FirstImpl>(),
                   Component.For<ISomeService>().ImplementedBy<SecondImpl>());

var someService = container.Resolve<ISomeService>();

in order to choose among handlers for FirstImpl and SecondImpl when resolving ISomeService, and this:

container.Register(Component.For<IFilterHandlersFor<ISomeService>>().ImplementedBy<SomeServiceFilter>(),
                   Component.For<ISomeService>().ImplementedBy<FirstImpl>(),
                   Component.For<ISomeService>().ImplementedBy<SecondImpl>());

var services = container.ResolveAll<ISomeService>();

in order to pick & choose & order the list of handlers invoked when resolving multimple implementations of ISomeService.

More info

Contact me through Twitter.

License

FtwFacility (or F.T.Windsor) is Beer-ware.