Question

我正在使用带有StructureMap的mvc.net来扫描和注册所有存储库和服务。现在我想通过Singleton注册和缓存。我该怎么办？

 IContainer container = new Container(x => {
            // Register Repositories and Services
            x.Scan(y => {
                y.AssemblyContainingType<SomeRepository>();
                y.AssemblyContainingType<SomeService>();

                y.IncludeNamespaceContainingType<SomeRepository>();
                y.IncludeNamespaceContainingType<SomeService>();
            });   

            // Register Controllers
            x.Scan(y => {
                y.TheCallingAssembly();
                y.AddAllTypesOf<IController>().NameBy(type => type.Name.Replace("Controller", ""));
            });
        });

Answer 1

使用2.6中的新API，不推荐使用ITypeScanner。这应该作为惯例来实现。一个简单的例子是你想要注册一个约定，所有类型的特定接口都是单例：

    Scan(a =>
    {
        a.AssemblyContainingType<IMyPluginType>();
        a.With(new SingletonConvention<IMyPluginType>());
        a.AddAllTypesOf<IMyPluginType>();
    });

然后：

    internal class SingletonConvention<TPluginFamily> : IRegistrationConvention
    {
        public void Process(Type type, Registry registry)
        {
            if (!type.IsConcrete() || !type.CanBeCreated() || !type.AllInterfaces().Contains(typeof(TPluginFamily))) return;

            registry.For(typeof(TPluginFamily)).Singleton().Use(type);
        }
    }

Answer 2

您需要实施类似于Jeremy Miller在http://codebetter.com/blogs/jeremy.miller/archive/2009/01/20/create-your-own-auto-registration-convention-with-structuremap.aspx概述的ITypeScanner

因此，对于您的控制器，我会将Scan调用更改为：

x.Scan(y => {
    y.TheCallingAssembly();
    y.With<MyNewTypeScanner>();
});

然后我会在其他地方定义一个看起来像这样的类：

public class MyNewTypeScanner: ITypeScanner
{
    //This method is responsible for determining if a type should be registered
    // and then passing it to RegisterType() if so
    public void Process(Type type, PluginGraph graph)
    {
        //At this point you would probably just test to see if type is IController
        //but you can get more sophisticated without too much headache.

        this.RegisterType(graph, type);
    }


    private void RegisterType(PluginGraph graph, Type implementingType)
    {
        //The argument passed to FindFamily must be the type/class that will be requested out of SM
        var family = graph.FindFamily(implementingType);

        family.AddType(implementingType);
        family.SetScopeTo(InstanceScope.Singleton);
    }
}

这应该适合你。

Answer 3

扩展@Eric Hauser的答案，创建一个更容易使用的解决方案

public abstract class TypedRegistrationConvention<TPluginFamily> 
                                        : IRegistrationConvention
{
    public virtual void Process(Type type, Registry registry)
    {
        if (!type.IsConcrete() 
            || !type.CanBeCreated() 
            || !type.AllInterfaces().Contains(typeof (TPluginFamily))) 
            return;

        ApplyConvention(type, registry);
    }

    public abstract void ApplyConvention(Type type, Registry registry);
}

使用这个已建立的基类，您可以实现约定，而不必使用类型检查代码。

public class SingletonConvention<TPluginFamily> 
                                : TypedRegistrationConvention<TPluginFamily>
{
    public override void ApplyConvention(Type type, Registry registry)
    {
        registry.For(typeof (TPluginFamily)).Singleton().Use(type);
    }
}

最后更简单的课程。

如何在Singleton中将Structuremap配置为Assembly and Cache中的自动扫描类型？

3 个答案: