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Sonarr/Autofac.Integration.Mvc/AutofacDependencyResolver.cs

165 lines
7.4 KiB
C#

// This software is part of the Autofac IoC container
// Copyright © 2011 Autofac Contributors
// http://autofac.org
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.Web.Mvc;
namespace Autofac.Integration.Mvc
{
/// <summary>
/// Autofac implementation of the <see cref="IDependencyResolver"/> interface.
/// </summary>
public class AutofacDependencyResolver : IDependencyResolver
{
readonly ILifetimeScope _container;
readonly Action<ContainerBuilder> _configurationAction;
ILifetimeScopeProvider _lifetimeScopeProvider;
/// <summary>
/// Initializes a new instance of the <see cref="AutofacDependencyResolver"/> class.
/// </summary>
/// <param name="container">The container that nested lifetime scopes will be create from.</param>
public AutofacDependencyResolver(ILifetimeScope container)
{
if (container == null) throw new ArgumentNullException("container");
_container = container;
}
/// <summary>
/// Initializes a new instance of the <see cref="AutofacDependencyResolver"/> class.
/// </summary>
/// <param name="container">The container that nested lifetime scopes will be create from.</param>
/// <param name="configurationAction">Action on a <see cref="ContainerBuilder"/>
/// that adds component registations visible only in nested lifetime scopes.</param>
public AutofacDependencyResolver(ILifetimeScope container, Action<ContainerBuilder> configurationAction)
: this(container)
{
if (configurationAction == null) throw new ArgumentNullException("configurationAction");
_configurationAction = configurationAction;
}
/// <summary>
/// Initializes a new instance of the <see cref="AutofacDependencyResolver"/> class.
/// </summary>
/// <param name="container">The container that nested lifetime scopes will be create from.</param>
/// <param name="lifetimeScopeProvider">A <see cref="ILifetimeScopeProvider"/> implementation for
/// creating new lifetime scopes.</param>
public AutofacDependencyResolver(ILifetimeScope container, ILifetimeScopeProvider lifetimeScopeProvider) :
this(container)
{
if (lifetimeScopeProvider == null) throw new ArgumentNullException("lifetimeScopeProvider");
_lifetimeScopeProvider = lifetimeScopeProvider;
}
/// <summary>
/// Initializes a new instance of the <see cref="AutofacDependencyResolver"/> class.
/// </summary>
/// <param name="container">The container that nested lifetime scopes will be create from.</param>
/// <param name="lifetimeScopeProvider">A <see cref="ILifetimeScopeProvider"/> implementation for
/// creating new lifetime scopes.</param>
/// <param name="configurationAction">Action on a <see cref="ContainerBuilder"/>
/// that adds component registations visible only in nested lifetime scopes.</param>
public AutofacDependencyResolver(ILifetimeScope container, ILifetimeScopeProvider lifetimeScopeProvider, Action<ContainerBuilder> configurationAction)
: this(container, lifetimeScopeProvider)
{
if (configurationAction == null) throw new ArgumentNullException("configurationAction");
_configurationAction = configurationAction;
}
/// <summary>
/// Gets the Autofac implementation of the dependency resolver.
/// </summary>
public static AutofacDependencyResolver Current
{
get
{
// Issue 351: We can't necessarily cast the current dependency resolver
// to AutofacDependencyResolver because diagnostic systems like Glimpse
// will wrap/proxy the resolver. Instead we need to register the resolver
// on the fly with the request lifetime scope and resolve it accordingly.
return DependencyResolver.Current.GetService<AutofacDependencyResolver>();
}
}
/// <summary>
/// The lifetime containing components for processing the current HTTP request.
/// </summary>
public ILifetimeScope RequestLifetimeScope
{
get
{
// Issue 351: Register the AutofacDependencyResolver with
// the request lifetime scope so the current resolver can
// be retrieved without having to cast it directly to
// this specific type.
Action<ContainerBuilder> composite = builder =>
{
if (this._configurationAction != null)
{
this._configurationAction(builder);
}
builder.RegisterInstance(this).As<AutofacDependencyResolver>();
};
if (_lifetimeScopeProvider == null)
{
_lifetimeScopeProvider = new RequestLifetimeScopeProvider(_container);
}
return _lifetimeScopeProvider.GetLifetimeScope(composite);
}
}
/// <summary>
/// Gets the application container that was provided to the constructor.
/// </summary>
public ILifetimeScope ApplicationContainer
{
get { return _container; }
}
/// <summary>
/// Get a single instance of a service.
/// </summary>
/// <param name="serviceType">Type of the service.</param>
/// <returns>The single instance if resolved; otherwise, <c>null</c>.</returns>
public object GetService(Type serviceType)
{
return RequestLifetimeScope.ResolveOptional(serviceType);
}
/// <summary>
/// Gets all available instances of a services.
/// </summary>
/// <param name="serviceType">Type of the service.</param>
/// <returns>The list of instances if any were resolved; otherwise, an empty list.</returns>
public IEnumerable<object> GetServices(Type serviceType)
{
var enumerableServiceType = typeof(IEnumerable<>).MakeGenericType(serviceType);
var instance = RequestLifetimeScope.Resolve(enumerableServiceType);
return (IEnumerable<object>)instance;
}
}
}