Module Scanning

[Cecil Phillip]

I'm incorporating autofac into a project I'm working on and I want to split the registrations up into modules. Is there a built in way to handle module scanning? If not, what would be the best approach to implement this myself ?

[Nicholas Blumhardt]

Not sure how anyone feels about the following :) but I'd expect this should work:

var moduleFinder = new ContainerBuilder();

moduleFinder.RegisterAssemblyTypes(...).As<IModule>();

var moduleContainer = moduleFinder.Build();

var containerBuilder = new ContainerBuilder();

foreach (var module in moduleContainer.Resolve<IEnumerable<IModule>>())

{

    containerBuilder.RegisterModule(module);

}

// Configure/use containerBuilder...

Cheers,

Nick

On 4 April 2012 08:16, Cecil Phillip <cecilp...@gmail.com> wrote:

I'm incorporating autofac into a project I'm working on and I want to split the registrations up into modules. Is there a built in way to handle module scanning? If not, what would be the best approach to implement this myself ?

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[Cecil Phillip]

Thanks Nick.. Based on your code of course, I put together this extension method

      public static void RegisterAssemblyModules(this ContainerBuilder builder, params Assembly[] assemblies)

        {

            var moduleFinder = new ContainerBuilder();

            moduleFinder.RegisterAssemblyTypes(assemblies)

              .Where(t => typeof(IModule).IsAssignableFrom(t))

              .As<IModule>();

            using (var moduleContainer = moduleFinder.Build())

            {

                foreach (var m in moduleContainer.Resolve<IEnumerable<IModule>>())

                    builder.RegisterModule(m);

            }

        }

[Nicholas Blumhardt]

Looks good, we should probably provide this functionality out of the box.

If you're using the latest version (unless there's a bug lurking :)) you shouldn't need the "Where" clause in there - As() will automatically filter on compatibility.

Cheers,
Nick

            }

        }

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[Cecil Phillip]

Oh, I didn't know that. Is there a changelog for the 2.6.1?

That's good info to update the documentation with :)

[Alex Meyer-Gleaves]

Hi guys,

This functionality is now available out-of-the-box. Well, it will be after the next release anyway. :)

http://code.google.com/p/autofac/source/detail?r=9d4caa9805762c885a997c852b370eb2d9c87bb8 

Register all IModule types:

[Test]

public void RegisterAssemblyModules()

{

var assembly = typeof(AComponent).Assembly;

var builder = new ContainerBuilder();

builder.RegisterAssemblyModules(assembly);

var container = builder.Build();

Assert.That(container.IsRegistered<AComponent>(), Is.True);

Assert.That(container.IsRegistered<BComponent>(), Is.True);

}

Register only certain module types:

[Test]

public void RegisterAssemblyModulesOfType()

{

var assembly = typeof(AComponent).Assembly;

var builder = new ContainerBuilder();

builder.RegisterAssemblyModules<AModule>(assembly);

var container = builder.Build();

Assert.That(container.IsRegistered<AComponent>(), Is.True);

Assert.That(container.IsRegistered<BComponent>(), Is.False);

}

Cheers,

Alex.

[Cecil Phillip]

That's amazingly awesome :)... Thank you for the update Sir

[Nicholas Blumhardt]

I think the change happened quite a few releases back now, possibly around 2.4. The commit log is the most detailed changelog ;)

On 6 April 2012 08:12, Cecil Phillip <cecilp...@gmail.com> wrote:

Oh, I didn't know that. Is there a changelog for the 2.6.1?

That's good info to update the documentation with :)

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