C# 传递Ninject内核是一种好的实践吗？

我正在编写一个小框架，它执行了几个任务。 有些任务需要通过Ninject注入的特定属性

var schedulerInstance = kernel.Get<Scheduler>();

假设我的基类中有以下表示单个任务的构造函数：

protected DDPSchedulerTask(ILogger logger, List<string> platforms, IBackOfficeDataStore backOfficeDataStore, ICommonDataStore commonDataStore)
{
    _logger = logger;
    _platforms = platforms;
    _backOfficeDataStore = backOfficeDataStore;
    _commonDataStore = commonDataStore;
}

有人知道如何解决这个问题吗

我可以将内核传递给不同的任务，但是有些东西告诉我这不是正确的方法

---

亲切问候

在这种情况下，我通常使用工厂模式。在调度程序中，可以将任务工厂作为依赖项。此工厂还可以有多种方法来创建不同类型的任务

class DDPSchedulerTaskFactory : IDDPSchedulerTaskFactory
{
    DDPSchedulerTaskFactory(ILogger logger, List<string> platforms, IBackOfficeDataStore backOfficeDataStore, ICommonDataStore commonDataStore)
    {
        _logger = logger;
        _platforms = platforms;
        _backOfficeDataStore = backOfficeDataStore;
        _commonDataStore = commonDataStore;
    }

    public IDDPSchedulerTask CreateNormal(){
        return new DDPSchedulerTask(
            _logger,
            _platforms,
            _backOfficeDataStore,
            _commonDataStore);
    }

    public IDDPSchedulerTask CreateSpecial(someAdditionalParameter){
        return new AnotherDDPSchedulerTask(
            _logger,
            _platforms,
            _backOfficeDataStore,
            _commonDataStore,
            someAdditionalParameter);
    }

    public IDDPSchedulerTask CreateTaskWithDifferentDependenties(yetAnotherParameter){
        return new AnotherDDPSchedulerTask(
            _logger,
            _platforms,
            yetAnotherParameter);
    }
}

---

你应该利用这个机会

只需创建一个代表任务工厂的接口。然后将信息传递给Ninject，这是一个工厂，他将为您创建此接口的完整实现

using System;
using System.Collections.Generic;
using Ninject;
using Ninject.Extensions.Factory;

internal class Program
{
    public static void Main(string[] args)
    {
        IKernel ninjectKernel = new StandardKernel();

        ninjectKernel.Bind<DDPSchedulerTask>().ToSelf();
        ninjectKernel.Bind<AWNFileGeneratorTask>().ToSelf();
        ninjectKernel.Bind<IDirectoryResolver>().To<DirectoryResolver>();
        ninjectKernel.Bind<ITaskFactory>().ToFactory();

        var mainTask = ninjectKernel.Get<DDPSchedulerTask>();
        mainTask.CreateDbSchedulerTask();
        mainTask.CreateAwnFileTask();

        Console.ReadLine();
    }
}

public interface ITaskFactory
{
    TTask CreateTask<TTask>() where TTask : DDPSchedulerTask;
}

public class DDPSchedulerTask
{
    private readonly ITaskFactory _tasksFactory;
    private readonly List<DDPSchedulerTask> _tasksList;

    public DDPSchedulerTask(ITaskFactory tasksFactory)
    {
        _tasksFactory = tasksFactory;

        _tasksList = new List<DDPSchedulerTask>();
    }

    public void CreateAwnFileTask()
    {
        var task = _tasksFactory.CreateTask<AWNFileGeneratorTask>();
        _tasksList.Add(task);
    }

    public void CreateDbSchedulerTask()
    {
        var task = _tasksFactory.CreateTask<DDPSchedulerTask>();
        _tasksList.Add(task);
    }
}

public class AWNFileGeneratorTask : DDPSchedulerTask
{
    [Inject]
    public IDirectoryResolver DirectoryResolver { get; set; }

    public AWNFileGeneratorTask(ITaskFactory tasksFactory)
        : base(tasksFactory)
    {
    }
}

public interface IDirectoryResolver
{
}

public class DirectoryResolver : IDirectoryResolver
{
}

额外参数注入：

public interface ITaskFactory
{
    DDPSchedulerTask CreateDDPSchedulerTask();
    AWNFileGeneratorTask CreateAWNFileGeneratorTask(string extraParam);
}

public class AWNFileGeneratorTask : DDPSchedulerTask
{
    private IDirectoryResolver _directoryResolver;
    private string _extraParam;

    public AWNFileGeneratorTask(ITaskFactory tasksFactory, IDirectoryResolver directoryResolver,
        string extraParam)
        : base(tasksFactory)
    {
        _extraParam = extraParam;
        _directoryResolver = directoryResolver;
    }
}

public void CreateAwnFileTask()
{
    var task = _tasksFactory.CreateAWNFileGeneratorTask("extra");
    _tasksList.Add(task);
}

---

好的，但是代码中有些地方不正确。在create方法中，返回类型设置为

DDPSchedulerTask

，但返回的是

DDPSchedulerTaskFactory

。另外，你能再解释一下你的解决方案吗？我应该从哪里调用create方法，因为我希望Unity也能注入额外的属性。谢谢你的更正。你介意告诉我从哪里我需要调用这个工厂，因为我想继续使用Ninject来确保依赖注入。我看不出这里有胶水。我仍然需要传入

someAdditionalParameters

，我希望Ninject内核在其中解决此问题。@复杂性您希望计划程序添加/配置所有任务，还是希望从外部调用计划程序上的某个AddTask（）方法？计划程序本身正在管理任务的创建，而不是从外部。如果是从外面来的。但问题是调度器可以定义例如5个任务，其中每个任务有4个参数，这些参数通过依赖项注入自动解决，因为这些属性被注入调度器的构造函数中。但是假设这5个任务中的每一个都需要另一个属性，我不想在调度器的构造函数中添加所有这些属性。相反，我希望调度器解决任务的依赖关系。那么内核共享呢？@复杂性我想，你说的是服务定位器，它被称为任何模式。理想情况下，您希望只在一个地方使用内核—某些入口点。并让它进一步传播依赖关系。请参阅编辑。这样您就可以绑定到Ninject-无法轻松替换IOC容器。（谈论注入属性）构造函数注入IDirectoryResolver没有问题。它也应该起作用。例如：public AWNFileGeneratorTask（ITaskFactory tasksFactory，IDirectoryResolver directorySolver）：base（tasksFactory）Ok。如何将附加参数（而不是依赖项）传递给任务构造函数？ITaskFactory的实现在哪里？没有ITaskFactory的实现。Ninject将自动实现此工厂。

class DDPSchedulerTaskFactory : IDDPSchedulerTaskFactory
{
    DDPSchedulerTaskFactory(ILogger logger, List<string> platforms, IBackOfficeDataStore backOfficeDataStore, ICommonDataStore commonDataStore)
    {
        _logger = logger;
        _platforms = platforms;
        _backOfficeDataStore = backOfficeDataStore;
        _commonDataStore = commonDataStore;
    }

    public IDDPSchedulerTask CreateNormal(){
        return new DDPSchedulerTask(
            _logger,
            _platforms,
            _backOfficeDataStore,
            _commonDataStore);
    }

    public IDDPSchedulerTask CreateSpecial(someAdditionalParameter){
        return new AnotherDDPSchedulerTask(
            _logger,
            _platforms,
            _backOfficeDataStore,
            _commonDataStore,
            someAdditionalParameter);
    }

    public IDDPSchedulerTask CreateTaskWithDifferentDependenties(yetAnotherParameter){
        return new AnotherDDPSchedulerTask(
            _logger,
            _platforms,
            yetAnotherParameter);
    }
}

class Scheduler{
    IDDPSchedulerTaskFactory _taskFactory;
    public Scheduler(IDDPSchedulerTaskFactory taskFactory){
        _taskFactory = taskFactory; // factory gets all the needed dependencies for all tasks from DI
    }   
    ...

    public void ConfigureTasks(){
        _tasks.Add(_taskFactory.CreateNormal());
        _tasks.Add(_taskFactory.CreateSpecial("Some important message"));
        _tasks.Add(_taskFactory.CreateTaskWithDifferentDependenties(123));
    }
}

using System;
using System.Collections.Generic;
using Ninject;
using Ninject.Extensions.Factory;

internal class Program
{
    public static void Main(string[] args)
    {
        IKernel ninjectKernel = new StandardKernel();

        ninjectKernel.Bind<DDPSchedulerTask>().ToSelf();
        ninjectKernel.Bind<AWNFileGeneratorTask>().ToSelf();
        ninjectKernel.Bind<IDirectoryResolver>().To<DirectoryResolver>();
        ninjectKernel.Bind<ITaskFactory>().ToFactory();

        var mainTask = ninjectKernel.Get<DDPSchedulerTask>();
        mainTask.CreateDbSchedulerTask();
        mainTask.CreateAwnFileTask();

        Console.ReadLine();
    }
}

public interface ITaskFactory
{
    TTask CreateTask<TTask>() where TTask : DDPSchedulerTask;
}

public class DDPSchedulerTask
{
    private readonly ITaskFactory _tasksFactory;
    private readonly List<DDPSchedulerTask> _tasksList;

    public DDPSchedulerTask(ITaskFactory tasksFactory)
    {
        _tasksFactory = tasksFactory;

        _tasksList = new List<DDPSchedulerTask>();
    }

    public void CreateAwnFileTask()
    {
        var task = _tasksFactory.CreateTask<AWNFileGeneratorTask>();
        _tasksList.Add(task);
    }

    public void CreateDbSchedulerTask()
    {
        var task = _tasksFactory.CreateTask<DDPSchedulerTask>();
        _tasksList.Add(task);
    }
}

public class AWNFileGeneratorTask : DDPSchedulerTask
{
    [Inject]
    public IDirectoryResolver DirectoryResolver { get; set; }

    public AWNFileGeneratorTask(ITaskFactory tasksFactory)
        : base(tasksFactory)
    {
    }
}

public interface IDirectoryResolver
{
}

public class DirectoryResolver : IDirectoryResolver
{
}

public class AWNFileGeneratorTask : DDPSchedulerTask
{
    private IDirectoryResolver _directoryResolver;

    public AWNFileGeneratorTask(ITaskFactory tasksFactory, IDirectoryResolver directoryResolver)
        : base(tasksFactory)
    {
        _directoryResolver = directoryResolver;
    }
}

public interface ITaskFactory
{
    DDPSchedulerTask CreateDDPSchedulerTask();
    AWNFileGeneratorTask CreateAWNFileGeneratorTask(string extraParam);
}

public class AWNFileGeneratorTask : DDPSchedulerTask
{
    private IDirectoryResolver _directoryResolver;
    private string _extraParam;

    public AWNFileGeneratorTask(ITaskFactory tasksFactory, IDirectoryResolver directoryResolver,
        string extraParam)
        : base(tasksFactory)
    {
        _extraParam = extraParam;
        _directoryResolver = directoryResolver;
    }
}

public void CreateAwnFileTask()
{
    var task = _tasksFactory.CreateAWNFileGeneratorTask("extra");
    _tasksList.Add(task);
}