Autofac模块扫描各种应用 [英] Autofac Module Scanning for Various Applications

问题描述

假设你工作在一个ASP.NET MVC项目，它是层分裂成不同的项目在一个单一的解决方案。每个项目都有创建要连接的依赖autofac模块。现在，我想扫描组件和登记所有模块的容器中。

Let's say you're working on an ASP.NET MVC project and it is layers split up into different projects in a single solution. Each project has autofac modules created to wire up the dependencies. Now, I would like to scan the assemblies and register all of the modules into the container.

我适应类似于在这里共享 http://goo.gl/VJEct

I adapted an extension method similar to what was shared here http://goo.gl/VJEct

public static void RegisterAssemblyModules(this ContainerBuilder builder, Assembly 
assembly)
{
  var scanningBuilder = new ContainerBuilder();

  scanningBuilder.RegisterAssemblyTypes(assembly)
    .Where(t => typeof(IModule).IsAssignableFrom(t))
    .As<IModule>();

  using (var scanningContainer = scanningBuilder.Build())
  {
    foreach (var m in scanningContainer.Resolve<IEnumerable<IModule>>())
      builder.RegisterModule(module);
  }
}

我的第一个问题，考虑到这是样品前几年提供的，这是仍然是一个可行的结构与autofac的当前版本使用？

My first question, considering that this sample was provided a few years ago, is this still an feasible construct to use with current versions of autofac?

其次，MVC应用程序依赖于功能的，这意味着有时我会需要.InstancePerHtt prequest注册类型（）其他层。不过，我也想有来自非Web应用程序引用他们的选择，而不是采取的System.Web的依赖。什么是注册，可以在这些不同的环境中使用模块的最佳方法呢？

Secondly, the MVC app is dependent on functionality in the other layers which means at times I would need to register types with .InstancePerHttpRequest(). However, I would also like to have the option of referencing them from non web applications and not take a dependency on System.Web. What is the best approach for to register modules that can be used in these different contexts?

推荐答案

我不会注册在容器中的模块。我认为没有理由这样做。

I would not register the modules in the container. I see no reason to do that.

下面是一个<一个href=\"https://github.com/sogeti-se/Sogeti.Pattern/blob/master/source/Sogeti.Pattern/Sogeti.Pattern.Core.Autofac/BuilderExtensions.cs\"相对=nofollow>替代。

它使用 Activator.CreateInstance 以创建模块，并在构建器进行注册。

It uses Activator.CreateInstance to create the modules and register them in the builder.

相同的构架也给你配置免费注册的支持。只需添加一个属性到你的服务：

The same framework also gives you configuration free registration support. Just add an attribute to your services:

[Component]
public class MyService : IService
{
}

和运行商扩展方法：

builder.RegisterAllComponents(Assembly.GetExecutingAssembly());

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