如何使用依赖于 HttpRequestMessage 值的 Castle Windsor 解析实例

Question

我正在使用 Web Api 和 OWIN 管道。

Startup.cs

public class Startup {
    public void Configuration(IAppBuilder app) {
        var container = new WindsorContainer().Install(FromAssembly.This());

        var config = new HttpConfiguration();
        config.MapHttpAttributeRoutes();

        // extension method to resolve controllers with Windsor.
        app.UseWindsorApi(config, container);
    }
}

MyClassInstaller.cs (IWindsorInstaller)

public void Install(IWindsorContainer container, IConfigurationStore store) 
{
    container.Register(
        Component.For<IMyClass>().ImplementedBy<MyClass>()
            .LifeStyle.PerWebRequest()
            .DependsOn(new {
                configSetting = ConfigurationManager.AppSettings["key"],
                otherSetting = ???
            }));
}

MyClass.cs & 我MyClass.cs

public class MyClass : IMyClass {
    private readonly string configSetting;
    private readonly string otherSetting;

    public MyClass(string configSetting, string otherSetting) {
        this.configSetting = configSetting;
        this.otherSetting = otherSetting;
    }

    public void DoSomething() {
        // method that uses the settings that were set in the constructor.
    }
}

public interface IMyClass {
    void DoSomething();
}

MyController.cs

public class MyController : ApiController {
    private readonly IMyClass myClass;

    public MyController(IMyClass myClass) {
        this.myClass = myClass;
    }

    [HttpGet]
    [Route("")]
    public async Task<IHttpActionResult> GetAsync() {
        // uses this.myClass
    }
}

这就是我卡住的地方。每当解析 MyClass 的实例时，都需要分配 otherSetting 的值。

otherSetting 的值由两件事决定。
1) client_id 从请求中声明价值。
2) 异步调用以 client_id 作为参数且 returns 为字符串值的方法。这是 otherSetting

中设置的内容

public async Task<string> GetOtherSetting(string client_id) {
    return "value";
}

我什至不确定从哪里开始让 Castle 注入基于这两个标准的值...

更新： 我已经更新了 patotopeelings 的答案，做了一些小改动，它似乎工作正常。

.DynamicParameters(async (k, p) =>
{
    var fundNameProvider = k.Resolve<IFundNameValueProvider>();
    p["otherSetting"] = await fundNameProvider.GetFundNameAsync();
    k.ReleaseComponent(fundNameProvider);
}))

我将其更改为异步 lambda，以便我可以等待该方法。我还调用了 ReleaseComponent，因为我的印象是，您手动使用 Castle 解析的对象也需要手动释放。

Answer 1

使用UsingFactoryMethod和DynamicParamters

首先，注入当前声明

...
Component.For<ClaimsIdentity>().UsingFactoryMethod(() => HttpContext.Current.User.Identity as ClaimsIdentity).LifestylePerWebRequest()
...

进入一个服务（IOtherValueProvider - PerWebRequest），该服务有一个 GetOtherSetting 方法来等待异步调用（即将异步调用转换为同步调用）以获取 otherSetting 从 client_id 中提取，注入 ClaimsIdentity

然后用DynamicParameters得到值

... register your class ...
.DynamicParameters((kernel, parameters) =>
    {
        parameters["otherSetting"] = kernel.Resolve<IOtherValueProvider>().GetOtherSetting();
    }))

如何使用依赖于 HttpRequestMessage 值的 Castle Windsor 解析实例

How to resolve instances with Castle Windsor that rely on values from the HttpRequestMessage

c#

dependency-injection

castle-windsor

Startup.cs

MyClassInstaller.cs (IWindsorInstaller)

MyClass.cs & 我MyClass.cs

MyController.cs