Ninject InRequestScope fallback to InThreadScope

Question

In my MVC3 project I\'ve setup my kernel to Ninject the Entityframework context on a InRequestScope basis, this works perfect. But I have a ba

Answer 1

This is what I composed to have the request scope in the first place and the thread as a fallback.

public static class NinjectBindingExtensions
{
    private static bool IsRequestPresent()
    {
        try
        {
            return HttpContext.Current != null;
        }
        catch
        {
            return false;
        }
    }

    private static object GetScope(IContext ctx)
    {
        // note: this is a copy of the private method of Ninject.Web.Common.RequestScopeExtensionMethod#GetScope
        return ctx.Kernel.Components.GetAll().Select(c => c.RequestScope).FirstOrDefault(s => s != null);
    }

    public static IBindingWhenInNamedWithOrOnSyntax InRequestFallbackScope(this IBindingWhenInNamedWithOrOnSyntax binding)
    {
        Func fallbackCallback = ctx => IsRequestPresent() ? GetScope(ctx) : StandardScopeCallbacks.Thread(ctx);
        binding.BindingConfiguration.ScopeCallback = fallbackCallback;
        return binding;
    }
}

If you are in the Thread scenario make sure you call _kernel.Components.Get().Clear(Thread.CurrentThread); to trigger the (maybe existing) Dispose() on the objects you loaded in this scope (-> Thread.CurrentThread).