huahaofeng
/
aspnetcore
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Updated hosting to use service describer

This commit is contained in:
David Fowler 2014-03-17 19:24:31 -07:00
parent 063420067e
commit cd9d3a3335
1 changed files with 11 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
src/Microsoft.AspNet.Hosting/HostingServices.cs
View File

@ -1,5 +1,4 @@
using System;
using System.Collections.Generic;
using System.Collections.Generic;
using Microsoft.AspNet.ConfigurationModel;
using Microsoft.AspNet.DependencyInjection;
using Microsoft.AspNet.Hosting.Builder;
@ -18,69 +17,24 @@ namespace Microsoft.AspNet.Hosting
public static IEnumerable<IServiceDescriptor> GetDefaultServices(IConfiguration configuration)
{
yield return DescribeService<IHostingEngine, HostingEngine>(configuration);
yield return DescribeService<IServerManager, ServerManager>(configuration);
var describer = new ServiceDescriber(configuration);
yield return DescribeService<IStartupManager, StartupManager>(configuration);
yield return DescribeService<IStartupLoaderProvider, StartupLoaderProvider>(configuration);
yield return describer.Transient<IHostingEngine, HostingEngine>();
yield return describer.Transient<IServerManager, ServerManager>();
yield return DescribeService<IBuilderFactory, BuilderFactory>(configuration);
yield return DescribeService<IHttpContextFactory, HttpContextFactory>(configuration);
yield return describer.Transient<IStartupManager, StartupManager>();
yield return describer.Transient<IStartupLoaderProvider, StartupLoaderProvider>();
yield return DescribeService<ITypeActivator, TypeActivator>(configuration);
yield return describer.Transient<IBuilderFactory, BuilderFactory>();
yield return describer.Transient<IHttpContextFactory, HttpContextFactory>();
yield return describer.Transient<ITypeActivator, TypeActivator>();
// The default IDataProtectionProvider is a singleton.
// Note: DPAPI isn't usable in IIS where the user profile hasn't been loaded, but loading DPAPI
// is deferred until the first call to Protect / Unprotect. It's up to an IIS-based host to
// replace this service as part of application initialization.
yield return new ServiceDescriptor {
ServiceType = typeof(IDataProtectionProvider),
Lifecycle = LifecycleKind.Singleton,
ImplementationInstance = DataProtectionProvider.CreateFromDpapi()
};
}
public static IServiceDescriptor DescribeService<TService, TImplementation>(IConfiguration configuration,
LifecycleKind lifecycle = LifecycleKind.Transient)
{
return DescribeService(typeof(TService), typeof(TImplementation), configuration, lifecycle);
}
public static IServiceDescriptor DescribeService(
Type serviceType,
Type implementationType,
IConfiguration configuration,
LifecycleKind lifecycle)
{
var serviceTypeName = serviceType.FullName;
var implementationTypeName = configuration.Get(serviceTypeName);
if (!String.IsNullOrEmpty(implementationTypeName))
{
try
{
implementationType = Type.GetType(implementationTypeName);
}
catch (Exception ex)
{
throw new Exception(string.Format("TODO: unable to locate implementation {0} for service {1}", implementationTypeName, serviceTypeName), ex);
}
}
return new ServiceTypeDescriptor(serviceType, implementationType, lifecycle);
}
public class ServiceTypeDescriptor : IServiceDescriptor
{
public ServiceTypeDescriptor(Type serviceType, Type implementationType, LifecycleKind lifecycle)
{
ServiceType = serviceType;
ImplementationType = implementationType;
Lifecycle = lifecycle;
}
public LifecycleKind Lifecycle { get; private set; }
public Type ServiceType { get; private set; }
public Type ImplementationType { get; private set; }
public object ImplementationInstance { get; private set; }
yield return describer.Instance<IDataProtectionProvider>(DataProtectionProvider.CreateFromDpapi());
}
}
}