How to reconfigure a service registration

[xp-development]

Hi. It is possible to replace a binding in a second registration block?

The following test is green, but ClearExports don't remove the export. I try to rebind (like Ninject) a service registration.

[Fact]
public void ReplaceExport_InSecondRegistrationBlock()
{
  var container = new DependencyInjectionContainer();

  container.Configure(c =>
  {
    c.Export<MultipleService1>().As<IMultipleService>();
  });

  container.Configure(c =>
  {
    c.ClearExports(export => export.ExportAs.Contains(typeof(IMultipleService)));
    c.Export<MultipleService2>().As<IMultipleService>();
  });

  var multipleService = container.Locate<IMultipleService>();
  Assert.Equal(multipleService.GetType(), typeof(MultipleService2));
}

[ipjohnson]

Hi @jan-schubert clear exports only clears within that configure block. By default registering a new export will become the default export. So if you remove the ClearExport your test will pass.

That said by default Grace builds delegates at runtime to achieve it's performance. So once you've resolved a type once the delegate is built and the dependencies are set. If you need to change dependencies after the first time a type is resolved you need to mark the dependency as IsDynamic (DynamicTests.cs for some examples)

[xp-development]

Great!