you don't need to pass the kernel or container to the MainForm. only
IApplicationFacade. also if there is only 1 implementation of a given
interface then you don't need the key either. you're code could look
something like this
class MyForm : Form
{
public MyForm(IApplicationFascade app)
{
}
}
class Program
{
public static IWindsorContainer Container { get; private set; }
public static void Main()
{
Container = new WindsorContainer()
.AddComponent<MyForm, MyForm>()
.AddComponent<IApplicationFascade,
ApplicationFacade>();
Container.Relsove<MyForm>().Show();
}
}
you should not need many (any?) references to either IKernel or
IWindsorContainer in the application. If you do need it, IKernel is
where all the real decision making is done. IWindsorContainer is just
a wrapper around IKernel. I try to keep IKernel within infrastructure
code only. Like implementations of SubDependencyReslovers,
ComponentConstructionBuilders, Handler Selectors, Interceptors...
those sorts of things. the GUI and business models are container
agnostic.
On Sep 25, 4:27 am, CarmineM <[email protected]> wrote:
> Hi Ken,
>
> On 25 Set, 09:27, Ken Egozi <[email protected]> wrote:
>
> > @Carmine - is there any chance that multiple instances of your application
> > are being started - thus you get multiple containers?the container should be
> > held as a static instance, and instantiated once per app domain
>
> Let me state that at the beginning it was the Kernel that got passed
> around to all
> components partecipating in the application. Then I switched to
> passing the WindsorContainer
> thinking the kernel might have been the "culprit". Obviously I was
> wrong.
>
> I don't think this happens because the container gets created upon
> application launch (in Program.cs)
> where the following things happens:
>
> IWindsorContainer container = new WindsorContainer();
> container.AddComponent<IApplicationFacade, ApplicationFacade>
> ("applicationFacade");
> container.AddComponent<MainForm>("mainForm");
>
> MainForm mf = container.Resolve<MainForm>("mainForm");
>
> Then the usual stuff in Program.cs happens which launches the
> MainForm.
>
> MainForm's constructor has the following signature:
>
> MainForm(IWindsorContainer container)
>
> And it gets called as expected.
>
> In the above mentioned constructor, the following things happens:
>
> IApplicationFacade = _container.Resolve<IApplciationFacade>
> ("applicationFacade");
>
> Which triggers the instantiation of ApplicationFacade's instance.
> ApplicationFacade's constructor has the following signature:
> ApplicationFacade(IWindsorContainer container)
>
> Its main purpose is to load any plugin and/or service it finds in the
> application folder.
> Both plugins and services have constructors with only one requirement:
> the "global" container.
> Plugins and services constructor does:
>
> _container.AddComponent<IMyServiceInterface,MyServiceClass>
> ("myServiceName");
> _facade = _container.Resolve<IApplicationFacade>("applicationFacade");
>
> Now, since the first time "applicationFacade" was requested it
> happened in the MainForm's constructor, I
> here expect to receive the already instantiated singleton since all of
> those plugins and services are loaded
> in the default application domain.
> Instead, tracing step by step, I discovered that the
> ApplicationFacade's constructor gets called each and every
> time the container is asked to resolve.
>
> To my newbie's eyes, it seems that I do nothing wrong.
> I beg your pardon but I couldn't post code for two reasons:
>
> 1. Source code's at home :)
> 2. I thought it was too much for a post. So, if you think that seeing
> actual code might be of some help,
> please, feel free to ask.
>
> Thanks again for all your precious help.
> Regards, Carmine
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