使用SimpleInjector有没有办法复制RegisterWebApiRequest＆LT; T＆GT;（）与.NET 4/1的WebAPI？ [英] Using SimpleInjector Is there a way to replicate RegisterWebApiRequest<T>() with .net 4/webapi 1?

问题描述

在这个问题的跟进。我通过例如使用SimpleInjector和的WebAPI的工作。不幸的是，在这里我想使用的WebAPI KB2568167 并的 KB2915689 prevent我从升级到.NET 4.5。所以我坚持使用.NET 4.0和放大器;此刻的WebAPI V1（4.0.30506.0）。

有没有一种方法，以复制 RegisterWebApiRequest＆LT; T＆GT;？（）与旧版本的WebAPI的作用域

虽然我的NU-获得软件包只.NET 4.5的版本，我可以下载code，并得到了一个框架4.0编译没有太多的麻烦。打电话时 VAR容器= request.GetDependencyScope（）在我的消息处理一个 SimpleInjectorWebApiDependencyResolver 类返回。试图检索一个实例从容器中像这样：

  VAR POCO =（SimplePOCO）container.GetService（typeof运算（SimplePOCO））;
 

在以下错误：

结果

  

已注册的委托类型SimplePOCO引发了异常。该
  SimplePOCO注册为网络API请求的生活方式，但
  实例请求一个网页API请求的上下文之外。

我只思念在我的配置的东西吗？是否有其他 - 就像创造我自己的消息处理程序

---

更新

张贴 codePLEX问题后，我又回到了基础。我把一个普通的的mvc的WebAPI项目，引用我的 SimpleInjector ， SimpleInjector.Integration.WebApi 的编译和 SimpleInjector.Extensions.ExecutionContextScoping 。

就像@blueling我能得到它在一个消息处理工作。

那么，有什么不同呢？我想过的是，我不工作的项目是光秃秃的骨头 - 只是的WebAPI和超薄的web.config。脚手架和绒毛来与基地项目模板都不是我的解决方案。明天我打算工作例子比较非工作一个参考通过引用而web.config中在一个时间设定。

---

更新2

那么一点点更多的调试，果然处置（）被调用的DependencyResolver实现，而不是由我....

  

解决方案

我能解决这个问题。我并不完全清楚的为什么的处置正在呼吁 SimpleInjectorWebApiDependencyResolver ，但这里是我想通了：

在 BAD 依赖解析器执行是的一个在这里所示：

 公共密封类SimpleInjectorWebApiDependencyResolver：的IDependencyResolver
{
  私人只读集装箱货柜;  公共SimpleInjectorWebApiDependencyResolver（集装箱货柜）
  {
    this.container =容器;
  }  公共IDependencyScope BeginScope（）
  {
    返回此;
  }  公共对象GetService的（类型的serviceType）
  {
    返回（（的IServiceProvider）this.container）.GetService（的serviceType）;
  }  公共IEnumerable的＆LT;对象＆gt; GetServices（类型的serviceType）
  {
    返回this.container.GetAllInstances（的serviceType）;
 } 公共无效的Dispose（）
 {
 }
}
 

我注意到有源$ C ​​$ C我下载<一个有点不同的副本href=\"https://simpleinjector.$c$cplex.com/SourceControl/latest#SimpleServiceLocator/SimpleInjector.Integration.WebApi/SimpleInjectorWebApiDependencyResolver.cs\"相对=nofollow>此处。

 公共密封类SimpleInjectorWebApiDependencyResolver：的IDependencyResolver
{
    私人只读集装箱货柜;
    私人只读范围范围;    公共SimpleInjectorWebApiDependencyResolver（集装箱货柜）：这个（集装箱，beginScope：FALSE）
    {
        Requires.IsNotNull（容器，容器）;
    }    私人SimpleInjectorWebApiDependencyResolver（集装箱货柜，布尔beginScope）
    {
        this.container =容器;        如果（beginScope）
        {
            this.scope = container.BeginExecutionContextScope（）;
        }
    }    IDependencyScope IDependencyResolver.BeginScope（）
    {
        返回新SimpleInjectorWebApiDependencyResolver（this.container，beginScope：真正的）;
    }    对象IDependencyScope.GetService（类型的serviceType）
    {
        如果（serviceType.IsAbstract＆安培;！＆安培; typeof运算（IHttpController）.IsAssignableFrom（的serviceType））
        {
            返回this.container.GetInstance（的serviceType）;
        }        返回（（的IServiceProvider）this.container）.GetService（的serviceType）;
    }    IEnumerable的＆LT;对象＆gt; IDependencyScope.GetServices（类型的serviceType）
    {
        返回this.container.GetAllInstances（的serviceType）;
    }    无效IDisposable.Dispose（）
    {
        如果（this.scope！= NULL）
        {
            this.scope.Dispose（）;
        }
    }
}
 

切换到该版本之后的一切工作。的我仍然有潜在的问题CallContext.LogicalGetData和嵌套执行上下文，因为@Steven还跟在评论中指出。因此，在您自担风险使用此解决方案的

Following up on this question. I'm working through example of using SimpleInjector and WebAPI. Unfortunately, where I want to utilize WebAPI KB2568167 and KB2915689 prevent me from upgrading to .net 4.5. So I'm stuck using .net 4.0 & WebAPI v1 (4.0.30506.0) at the moment.

Is there a way to replicate the RegisterWebApiRequest<T>() scoping with the older version of WebAPI?

While I the nu-get packages only contain .net 4.5 versions, I was able to download the code and get a framework 4.0 compile without much trouble. When calling var container = request.GetDependencyScope() in my Message Handler a SimpleInjectorWebApiDependencyResolver class is returned. Attempting to retrieve an instance out of the container like so:

  var poco = (SimplePOCO) container.GetService(typeof(SimplePOCO));

results in the following error::

The registered delegate for type SimplePOCO threw an exception. The SimplePOCO is registered as 'Web API Request' lifestyle, but the instance is requested outside the context of a Web API Request.

Am I just missing something in my config? Is there an alternative -- like creating my own message handler?

---

UPDATE

After posting the codeplex issue, I went back to basics. I took a plain vanilla Mvc WebApi project, referenced my compiles of SimpleInjector, SimpleInjector.Integration.WebApi, and SimpleInjector.Extensions.ExecutionContextScoping.

Like @blueling I was able to get it working in a message handler.

So what's different? One thought I had is that my non-functioning project is bare bones -- just WebApi and slim web.config. None of the scaffolding and fluff that come with the base project templates are in my solution. Tomorrow I plan to compare the work example to the non-working one reference-by-reference and web.config setting at a time.

---

UPDATE 2

So a little more debugging, and sure enough Dispose() is being called on the DependencyResolver implementation, but not by me....

解决方案

I was able to resolve this problem. I'm not entirely clear why dispose was being called on SimpleInjectorWebApiDependencyResolver, but here's what I figured out:

The BAD Dependency resolver implementation was a copy of the one listed here:

public sealed class SimpleInjectorWebApiDependencyResolver : IDependencyResolver
{
  private readonly Container container;

  public SimpleInjectorWebApiDependencyResolver(Container container)
  {
    this.container = container;
  }

  public IDependencyScope BeginScope()
  {
    return this;
  }

  public object GetService(Type serviceType)
  {
    return ((IServiceProvider)this.container).GetService(serviceType);
  }

  public IEnumerable<object> GetServices(Type serviceType)
  {
    return this.container.GetAllInstances(serviceType);
 }

 public void Dispose()
 {
 }
}

I noticed there is a bit different copy in the source code I downloaded here.

public sealed class SimpleInjectorWebApiDependencyResolver : IDependencyResolver
{
    private readonly Container container;
    private readonly Scope scope;

    public SimpleInjectorWebApiDependencyResolver(Container container) : this(container, beginScope: false)
    {
        Requires.IsNotNull(container, "container");
    }

    private SimpleInjectorWebApiDependencyResolver(Container container, bool beginScope)
    {
        this.container = container;

        if (beginScope)
        {
            this.scope = container.BeginExecutionContextScope();
        }
    }

    IDependencyScope IDependencyResolver.BeginScope()
    {
        return new SimpleInjectorWebApiDependencyResolver(this.container, beginScope: true);
    }

    object IDependencyScope.GetService(Type serviceType)
    {
        if (!serviceType.IsAbstract && typeof(IHttpController).IsAssignableFrom(serviceType))
        {
            return this.container.GetInstance(serviceType);
        }

        return ((IServiceProvider)this.container).GetService(serviceType);
    }

    IEnumerable<object> IDependencyScope.GetServices(Type serviceType)
    {
        return this.container.GetAllInstances(serviceType);
    }

    void IDisposable.Dispose()
    {
        if (this.scope != null)
        {
            this.scope.Dispose();
        }
    }
}

After switching over to this version everything worked. I still have potential issues CallContext.LogicalGetData and Nested Execution Contexts, as @Steven was kind enough to point out in the comments. So use this solution at your own risk.

这篇关于使用SimpleInjector有没有办法复制RegisterWebApiRequest＆LT; T＆GT;（）与.NET 4/1的WebAPI？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！