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AutofacWebApiDependencyResolver.cs
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AutofacWebApiDependencyResolver.cs
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// This software is part of the Autofac IoC container
// Copyright (c) 2012 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.Security;
using System.Web.Http.Dependencies;
using Autofac.Core.Lifetime;
namespace Autofac.Integration.WebApi
{
/// <summary>
/// Autofac implementation of the <see cref="IDependencyResolver"/> interface.
/// </summary>
[SecurityCritical]
public class AutofacWebApiDependencyResolver : IDependencyResolver
{
private bool _disposed;
readonly ILifetimeScope _container;
readonly IDependencyScope _rootDependencyScope;
/// <summary>
/// Initializes a new instance of the <see cref="AutofacWebApiDependencyResolver"/> class.
/// </summary>
/// <param name="container">The container that nested lifetime scopes will be create from.</param>
public AutofacWebApiDependencyResolver(ILifetimeScope container)
{
if (container == null) throw new ArgumentNullException("container");
_container = container;
_rootDependencyScope = new AutofacWebApiDependencyScope(container);
}
/// <summary>
/// Finalizes an instance of the <see cref="AutofacWebApiDependencyResolver"/> class.
/// </summary>
[SecuritySafeCritical]
~AutofacWebApiDependencyResolver()
{
Dispose(false);
}
/// <summary>
/// Gets the root container provided to the dependency resolver.
/// </summary>
public ILifetimeScope Container
{
get { return _container; }
}
/// <summary>
/// Try to get a service of the given type.
/// </summary>
/// <param name="serviceType">Type of service to request.</param>
/// <returns>An instance of the service, or null if the service is not found.</returns>
[SecurityCritical]
public object GetService(Type serviceType)
{
return _rootDependencyScope.GetService(serviceType);
}
/// <summary>
/// Try to get a list of services of the given type.
/// </summary>
/// <param name="serviceType">ControllerType of services to request.</param>
/// <returns>An enumeration (possibly empty) of the service.</returns>
[SecurityCritical]
public IEnumerable<object> GetServices(Type serviceType)
{
return _rootDependencyScope.GetServices(serviceType);
}
/// <summary>
/// Starts a resolution scope. Objects which are resolved in the given scope will belong to
/// that scope, and when the scope is disposed, those objects are returned to the container.
/// </summary>
/// <returns>
/// The dependency scope.
/// </returns>
[SecurityCritical]
public IDependencyScope BeginScope()
{
var lifetimeScope = _container.BeginLifetimeScope(MatchingScopeLifetimeTags.RequestLifetimeScopeTag);
return new AutofacWebApiDependencyScope(lifetimeScope);
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
[SecuritySafeCritical]
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private void Dispose(bool disposing)
{
if (!_disposed)
{
if (disposing)
{
if (_rootDependencyScope != null)
{
_rootDependencyScope.Dispose();
}
}
_disposed = true;
}
}
}
}