MVC Unity Reset DI on user logout

Question

I use unity as my IoC, and when the application loads, I set my initial DI to global.asax, which is required for my login screen.

When the user logs into system I, I install my main DI, which creates all the DI data for the rest of the application. One of the objects that I create is to save user data on the login screen, and I use this dto to enter my services, which will be used for authorization.

The problem is when the user logs out. I need to get rid of dto containing user details.

Is there any way to destroy an object in unity that is not called inside global.asax?

EDIT

In my class, bootstrapper, which is called from global.asax. I only need to install DI for security at this point.

Dim container As IUnityContainer = Bootstrapper.UnityContainer

        SecurityContainer.RegisterContainer(container)
        MiscContainer.RegisterMiscContainer(container)

        DependencyResolver.SetResolver(New UnityDependencyResolver(container))

        ' Setup controller factory.
        ControllerBuilder.Current.SetControllerFactory(New UnityControllerFactory(container))

In my RegisterContainer classes, they just have simple registrations, as shown below.

container.RegisterType(Of ILeadService, LeadService)(New ContainerControlledLifetimeManager())

In my method of entering mail in the controller, I have the following code. This will be sent to the security service for user authentication. If they are authenticated, I need to configure the next part of the DI, which is the rest of the application. The reason I should install this DI here instead of global.asax is because I need to use securityDto in all my other services.

Public Function LogOnWindow(loginViewModel As LoginViewModel) As ActionResult

        Dim action As ActionResult = Nothing

        ' Authorise the user.
        Dim securityResponse As ISecurityResponse = Me._securityService.AuthenticateUser(loginViewModel.UserName,
                                                                                         loginViewModel.Password)

        ' Check the response is successful.
        If (securityResponse.IsSuccessful) Then

            ' Set the application id.
            securityResponse.SecurityDto.CurrentDealerApplicationId = Me._applicationType

            ' Setup the bootstrapper with the security credentials.
            Bootstrapper.InitialiseAfterLogin(securityResponse.SecurityDto)

            ' Redirect to the main application.
            action = Me.RedirectToAction("KiaDashGrid",
                                         "Kia",
                                         New With {.Language = "en-gb"})

        Else

            ' Create an error message.
            loginViewModel.MessageManager.Merge(securityResponse.MessageManager.GetMessageCollection())

        End If

        If (action Is Nothing) Then
            action = Me.View(loginViewModel)
        End If

        Return action

    End Function

SecurityResponse.SecurityDto contains the user credentials that I insert into other application services.

An example of a constructor for a service using dto.

Public Class LeadService
    Inherits ServiceBase
    Implements ILeadService

    Public Sub New(mapper As IMapper,
                   uow As IUnitOfWork,
                   leadRepository As ILeadRepository,
                   securityDTO As ISecurityDTO)
        MyBase.New(securityDTO)
        Me._mapper = mapper
        Me._uow = uow
        Me._leadRepository = leadRepository
        Me._fetchStrategy = New FetchStrategy(Of Lead)()

    End Sub
End Class

dto reset, .

.

<HttpGet()> _
    Public Function LogOut() As ActionResult

        ' Need to clear the security dto credentials here.            

        Return Me.RedirectToAction("LogOnWindow",
                                   "KiaLogin",
                                    New With {.Language = "en-gb"})
    End Function

, .

EDIT - 19/02/2014

PerSessionLifetimeManager, , gui.

bootstrapper , .

Dim manager As New PerSessionLifetimeManager()
        manager.SetValue(securityDto)
        container.RegisterType(Of ISecurityDTO, SecurityDTO)(manager)

container.RegisterInstance(securityDto, New PerSessionLifetimeManager())

PerSessionLifetimeManager.

Public Class PerSessionLifetimeManager
    Inherits LifetimeManager

    Private ReadOnly _key As Guid = Guid.NewGuid()

    Public Sub New()
        MyBase.New()
    End Sub

    Public Overrides Function GetValue() As Object
        Return HttpContext.Current.Session(Me._key.ToString())
    End Function

    Public Overrides Sub RemoveValue()
        HttpContext.Current.Session.Remove(Me._key.ToString())
    End Sub

    Public Overrides Sub SetValue(newValue As Object)
        HttpContext.Current.Session(Me._key.ToString()) = newValue
    End Sub

End Class

Answer 1

, , ContainerControlledLifetimeManager.

, , . , SessionLifetimeMananager :

MVC3, Unity Framework

, .