MVC3 & Ninject / Unity:注入分层服务容器

本文关键字:分层 注入 服务 Unity amp Ninject MVC3 | 更新日期: 2023-09-27 18:35:06

我已经使用Ninject一段时间了,但仅用于简单的DI。我有一个稍微复杂的场景,我想迎合。

我正在使用带有控制器注入的Ninject.Web.MVC插件,该插件在我的基本控制器上被强制传递到所有继承控制器。这是我的基本模式:

using System;
using System.Web;
using System.Web.Mvc;
using Business;
using Microsoft.Web.Infrastructure.DynamicModuleHelper;
using Ninject;
using Ninject.Web.Common;
namespace Web {
    #region Controller
    public class MyController : MyBaseController {
        public MyController(IMyService1 myService1, IMyService2 myService2)
            : base(myService1, myService2) {
        }
        public ActionResult MyAction() {
            MyServiceProp1.DoSomething();
            MyServiceProp2.DoSomethingElse();
            return View();
        }
    }
    public class MyBaseController : Controller {
        protected IMyService1 MyServiceProp1 { get; set; }
        protected IMyService2 MyServiceProp2 { get; set; }
        public MyBaseController(IMyService1 myService1, IMyService2 myService2) {
            MyServiceProp1 = myService1;
            MyServiceProp2 = myService2;
        }
    }
    #endregion
}
namespace Business {
    #region Services
    public interface IMyService1 {
        void DoSomething();
    }
    public interface IMyService2 {
        void DoSomethingElse();
    }
    public class MyService1 : IMyService1 {
        public void DoSomething() {
        }
    }
    public class MyService2 : IMyService2 {
        public void DoSomethingElse() {
        }
    }
    #endregion
}
#region Ninject stuff
namespace Web.App_Start {
    public static class NinjectWebCommon {
        private static readonly Bootstrapper bootstrapper = new Bootstrapper();
        /// <summary>
        /// Starts the application
        /// </summary>
        public static void Start() {
            DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
            DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
            bootstrapper.Initialize(CreateKernel);
        }
        /// <summary>
        /// Stops the application.
        /// </summary>
        public static void Stop() {
            bootstrapper.ShutDown();
        }
        /// <summary>
        /// Creates a kernel that will manage the application.
        /// </summary>
        /// <returns>The created kernel.</returns>
        private static IKernel CreateKernel() {
            var kernel = new StandardKernel();
            kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
            kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();
            RegisterServices(kernel);
            return kernel;
        }
        /// <summary>
        /// Loads modules and services
        /// </summary>
        /// <param name="kernel">The kernel.</param>
        private static void RegisterServices(IKernel kernel) {
            kernel.Bind<IMyService1>().To<MyService1>();
            kernel.Bind<IMyService2>().To<MyService2>();
        }
    }
}
#endregion

如您所见,我有多种服务。如果我想添加 MyService3,我将不得不修改实现基本控制器的每个控制器。虽然就目前而言,这不是一项艰巨的工作,但当项目更大时......

我想做的是实现某种服务容器,我将注入到基本控制器中,从而注入到所有实现控制器(以及任何后续类)中:

namespace Web {
    #region Controller
    public class MyController : MyBaseController {
        public MyController(IMyServiceContainer container)
            : base(container) {
        }
        public ActionResult MyAction() {
            MyServiceProp1.DoSomething();
            MyServiceProp2.DoSomethingElse();
            return View();
        }
    }
    public interface IMyServiceContainer {
        IMyService1 MyServiceProp1 { get; set; }
        IMyService2 MyServiceProp2 { get; set; }
    }
    public class MyBaseController : Controller, IMyServiceContainer {
        public MyBaseController(IMyServiceContainer container) {
            MyServiceProp1 = container.MyServiceProp1;
            MyServiceProp2 = container.MyServiceProp2;
        }
        #region Implementation of IMyServiceContainer
        public IMyService1 MyServiceProp1 { get; set; }
        public IMyService2 MyServiceProp2 { get; set; }
        #endregion
    }
    #endregion
}

这样,如果我需要添加全局依赖项,我就不必更改任何控制器,只需更改基本控制器,这更容易维护。

有没有办法使用 Ninject(甚至是 Unity,因为我很快就会将其更改为那个)来实现这一点,该模式/方法是否有我尚未听说过的特定名称?

MVC3 & Ninject / Unity:注入分层服务容器

public interface IMyServiceContainer 
{
    IMyService1 MyService1 { get; }
    IMyService2 MyService2 { get; }
    IMyService3 MyService3 { get; }
}
public class MyServiceContainer 
{
    public IMyService1 MyService1 { get; private set; }
    public IMyService2 MyService2 { get; private set; }
    public IMyService3 MyService3 { get; private set; }
    public MyServiceContainer(IMyService1 myService1, IMyService2 myService2, IMyService3 myService3)
    {
        MyService1 = myService1;
        MyService2 = myService2;
        MyService3 = myService3;
    }
}

然后是您的基本控制器:

public class MyBaseController : Controller 
{
    public MyBaseController(IMyServiceContainer container) 
    {
        Container = container;
    }
    protected IMyServiceContainer Container { get; private set; }
}

然后是派生的控制器:

public class MyController : MyBaseController 
{
    public MyController(IMyServiceContainer container) : base(container) 
    {
    }
    public ActionResult MyAction() 
    {
        Container.MyService1.DoSomething();
        Container.MyService2.DoSomethingElse();
        return View();
    }
}

现在剩下的就是配置 NInject:

private static void RegisterServices(IKernel kernel) 
{
    kernel.Bind<IMyService1>().To<MyService1>();
    kernel.Bind<IMyService2>().To<MyService2>();
    kernel.Bind<IMyService3>().To<MyService3>();
    kernel.Bind<IMyServiceContainer>().To<MyServiceContainer>();
}