A LifetimeManager that holds onto the instance given to it during
the lifetime of a single HTTP request.
This lifetime manager enables you to create instances of registered types that behave like
singletons within the scope of an HTTP request.
See remarks for important usage information.
Namespace:Microsoft.Practices.Unity Assembly:Microsoft.Practices.Unity.Mvc (in Microsoft.Practices.Unity.Mvc.dll) Version: 220.127.116.11 (3.0.1304.0)
Although the PerRequestLifetimeManager lifetime manager works correctly and can help
in working with stateful or thread-unsafe dependencies within the scope of an HTTP request, it is
generally not a good idea to use it when it can be avoided, as it can often lead to bad practices or
hard to find bugs in the end-user's application code when used incorrectly.
It is recommended that the dependencies you register are stateless and if there is a need to share
common state between several objects during the lifetime of an HTTP request, then you can
have a stateless service that explicitly stores and retrieves this state using the
Items collection of the Current object.
For the instance of the registered type to be disposed automatically when the HTTP request completes,
make sure to register the UnityPerRequestHttpModule with the web application.
To do this, invoke the following in the Unity bootstrapping class (typically UnityMvcActivator.cs):