Caliburn.micro与团结

Question

目前我正在学习更多关于caliburn.micro的内容,这真是令人惊叹.

在我的小型演示项目中,有一些导航,有MEF和EventAggregator.

由于我想在一个已经使用统一的项目中使用caliburn.micro,我想使用Unity进行DI.

如何设置引导程序以使用Unity？

除了MindScape教程和codeplex页面上的任何好的教程都非常受欢迎.(除了我没有看到处理这种情况的合适的人)

Answer 1

在引导程序中必须覆盖4种方法来连接IoC容器(使用时Boostrapper<T>):

1. Configure()

   这通常是初始化容器并注册所有依赖项的地方.

2. GetInstance(string, Type)

   按类型和键检索对象 - 据我所知,它通常被框架用来检索例如视图模型,常规依赖项.所以这里你的容器必须以某种方式获得基于a string和/或的实例Type(通常使用视图优先绑定将模型连接到视图时使用类型,字符串).通常容器内置类似的方法,开箱即用或只需稍微调整即可.

3. GetAllInstances(Type)

   检索对象集合(仅按类型) - 据我从经验中可以看出,这个通常由Caliburn.Micro用于视图.

4. BuildUp(object)

   一种可以对对象进行属性注入的方法.

如果您有兴趣,我有一个使用SimpleInjector(或Autofac)的示例,遗憾的是我没有使用Unity的经验.

[编辑]

采样时间!这个是使用SimpleInjector.

public class MainViewModel
{
//...
}

public class ApplicationBootstrapper : Bootstrapper<MainViewModel>
{
    private Container container;

    protected override void Configure()
    {
        container = new Container();

        container.Register<IWindowManager, WindowManager>();
      //for Unity, that would probably be something like:
      //container.RegisterType<IWindowManager, WindowManager>();
        container.RegisterSingle<IEventAggregator, EventAggregator>();

        container.Verify();
    }

    protected override object GetInstance(string key, Type service)
    {
        // Now, for example, you can't resolve dependency by key in SimpleInjector, so you have to
        // create the type out of the string (if the 'service' parameter is missing)
        var serviceType = service;
        if(serviceType == null)
        {
            var typeName = Assembly.GetExecutingAssembly().DefinedTypes.Where(x => x.Name == key).Select(x => x.FullName).FirstOrDefault();
            if(typeName == null)
                throw new InvalidOperationException("No matching type found");

            serviceType = Type.GetType(typeName);
        }

        return container.GetInstance(serviceType);
        //Unity: container.Resolve(serviceType) or Resolve(serviceType, name)...?

    }

    protected override IEnumerable<object> GetAllInstances(Type service)
    {
        return container.GetAllInstances(service);
        //Unity: No idea here.
    }

    protected override void BuildUp(object instance)
    {
        container.InjectProperties(instance);
        //Unity: No idea here.
    }
}

Answer 2

我发现CM的Wiki非常有用,并且来自Unity/CSL背景的Bootstrapper<TRootModel>方法名称和签名是直观的.

我想分享我自己的UnityBootstrapper<TRootModel>使用Unity 3 的Class ,它小巧,干净,可以满足您的期望.

/// <summary>
/// <para>Unity Bootstrapper for Caliburn.Micro</para>
/// <para>You can subclass this just as you would Caliburn's Bootstrapper</para>
/// <para>http://caliburnmicro.codeplex.com/wikipage?title=Customizing%20The%20Bootstrapper</para>
/// </summary>
/// <typeparam name="TRootModel">Root ViewModel</typeparam>
public class UnityBootstrapper<TRootModel>
    : Bootstrapper<TRootModel>
    where TRootModel : class, new()
{
    protected UnityContainer Container
    {
        get { return _container; }
        set { _container = value; }
    }

    private UnityContainer _container = new UnityContainer();

    protected override void Configure()
    {
        if (!Container.IsRegistered<IWindowManager>())
        {
            Container.RegisterInstance<IWindowManager>(new WindowManager());
        }
        if (!Container.IsRegistered<IEventAggregator>())
        {
            Container.RegisterInstance<IEventAggregator>(new EventAggregator());
        }
        base.Configure();
    }

    protected override void BuildUp(object instance)
    {
        instance = Container.BuildUp(instance);
        base.BuildUp(instance);
    }

    protected override IEnumerable<object> GetAllInstances(Type type)
    {
        return Container.ResolveAll(type);
    }

    protected override object GetInstance(Type type, string name)
    {
        var result = default(object);
        if (name != null)
        {
            result = Container.Resolve(type, name);
        }
        else
        {
            result = Container.Resolve(type);
        }
        return result;
    }
}

您可以直接实例化,提供有效的泛型类型参数,或者您可以子类化和自定义诸如Lifetime Managers之类的内容:

public class AppBootstrapper
    : UnityBootstrapper<ViewModels.AppViewModel>
{
    protected override void Configure()
    {
        // register a 'singleton' instance of the app view model
        base.Container.RegisterInstance(
            new ViewModels.AppViewModel(), 
            new ContainerControlledLifetimeManager());

        // finish configuring for Caliburn
        base.Configure();
    }
}