问题
So I've been playing around with the latest release of the WCF Web API and decided I wanted to dive into implementing Ninject with it.
Based off what I've read I need to implement the interface IResourceFactory which demands the following methods:
public object GetInstance(System.Type serviceType,
System.ServiceModel.InstanceContext instanceContext,
System.Net.Http.HttpRequestMessage request);
public void ReleaseInstance(System.ServiceModel.InstanceContext instanceContext,
object service);
So I chicken scratched the following out:
public class NinjectResourceFactory : IResourceFactory
{
private readonly IKernel _kernel;
public NinjectResourceFactory()
{
var modules = new INinjectModule[]
{
new ServiceDIModule(), //Service Layer Module
new RepositoryDIModule(), //Repo Layer Module
new DataServiceDIModule()
};
_kernel = new StandardKernel(modules);
}
#region IResourceFactory Members
public object GetInstance(Type serviceType,
InstanceContext instanceContext,
HttpRequestMessage request)
{
return Resolve(serviceType);
}
public void ReleaseInstance(InstanceContext instanceContext, object service)
{
throw new NotImplementedException();
}
#endregion
private object Resolve(Type type)
{
return _kernel.Get(type);
}
//private T Resolve<T>()
//{
// return _kernel.Get<T>();
//}
//private T Resolve<T>(string name)
//{
// return _kernel.Get<T>(metaData => metaData.Has(name));
// return _kernel.Get<T>().Equals(With.Parameters.
// ContextVariable("name", name));
//}
}
and wired it up with
var configuration = HttpHostConfiguration.Create().SetResourceFactory(new NinjectResourceFactory());
RouteTable.Routes.MapServiceRoute<StateProvinceResource>("States", configuration);
Amazingly, this seems to work. The first resource method I created to serve out a list of states/provinces generates output with HTTP 200 OK.
So, to the question. Is there a cleaner way of writing this factory? I really fuddled through it and it just doesn't feel right. I feel like I'm missing something obvious staring me in the face. The hack I made in the new Resolve method feels especially dirty so I figured I'd tap into those more experienced to tighten this up. Has anyone else implemented Ninject with the WCF Web API and implemented a cleaner solution?
Thanks for any input!
回答1:
You could implement it by passing in the Kernel from the application scope.
public class NinjectResourceFactory : IResourceFactory
{
private readonly IKernel _kernel;
public NinjectResourceFactory(IKernel kernel)
{
_kernel = kernel;
}
public object GetInstance(Type serviceType, InstanceContext instanceContext, HttpRequestMessage request)
{
return _kernel.Get(serviceType);
}
public void ReleaseInstance(InstanceContext instanceContext, object service)
{
// no op
}
}
来源:https://stackoverflow.com/questions/5906139/setting-up-ninject-with-the-new-wcf-web-api