Castle Windsor intercept method call from within the class

Question

We have components registrations in Castle Windsor container like so

void RegisterComponent() {
    var component = Compon         


        

Answer 1

I know this is an old thread, but I just came across it while getting Castle interceptors working in Blazor WASM (which they actually do, but beware...Mono can't seem to support proxying any class that has any generic methods...).

Anyway, to get around this issue in my case, I simply injected the container into my class, and in the method that needed to call a "sibling method" via this I simply resolved a fresh instance of my interface and called the method on that. It won't work for scenarios with shared context/transient states, but the interceptor indeed does its thing.

In Blazor's client WASM app's Program.cs:

public static async Task Main(string[] args)
{
    WebAssemblyHostBuilder builder = WebAssemblyHostBuilder.CreateDefault(args);

    ...

    builder.ConfigureContainer(new WindsorServiceProviderFactory(), container =>
    {
        container.Register(Component.For()
                                    .ImplementedBy()
                                    .Named("BlazorInterceptor").LifestyleTransient());
    });

    ...

    builder.Services.AddScoped();
    
    ...

    await builder.Build().RunAsync();
}

Example service and interface implementation:

public Interface IService
{
    MethodA(int arg);
    MethodB(int arg);
}

[Interceptor("BlazorInterceptor")]
public class Service : IService
{
    private readonly IServiceProvider _container;

    public Service(IServiceProvider container)
    {
        this._container = container;
    }

    public MethodA(int arg)
    {
        IService service = this._container.GetRequiredService();
        service.MethodB(arg);
    }

    public MethodB(int arg)
    {
        //should be intercepted...just in a different instance of the service unless you're using singletons...
    }
}

Pros: Doesn't require virtualizing methods or complicating your DI configuration. Cons: Kind of gross (useful for stateless repositories, but would probably give something like EF a heart attack).