Releasing ObjectContext while using StructureMap - entity-framework-4

Question

I've been using StructureMap to inject ObjectContext (entities) into my repositories along with lazy-loaded POCO classes. This is my Structuremap registration.
For<WebEntities>().LifecycleIs(new HybridLifecycle()).Use(()=>new WebEntities());
I have defined Partial classes against my POCO classes to retrieve info that is not defined in my EDMX schema. e.g. Community.FloorPlanImages would be a getter which filters only the floor plan images from all available Images. Worked pretty well until I started to optimize my queries. Using EFProf, I found out that none of my connections were being closed. I could not use an 'using' statement since I'm injecting the ObjectContext itself into my repository. So, I added the following in my Application_EndRequest().
ObjectFactory.ReleaseAndDisposeAllHttpScopedObjects();
This works too as long as I don't access anything on my Partial POCOs. I think StructureMap is closing the connection before we get to the Partial. I'm presented with the following error.
The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.
Any ideas to get around this?
UPDATE - Here's the stack trace
ObjectDisposedException: The
ObjectContext instance has been
disposed and can no longer be used for
operations that require a connection.]
System.Data.Objects.ObjectContext.EnsureConnection()
+8550458 System.Data.Objects.ObjectQuery1.GetResults(Nullable1
forMergeOption) +46
System.Data.Objects.ObjectQuery1.Execute(MergeOption
mergeOption) +31
System.Data.Objects.DataClasses.EntityCollection1.Load(List1
collection, MergeOption mergeOption)
+243 System.Data.Objects.DataClasses.EntityCollection1.Load(MergeOption
mergeOption) +25
System.Data.Objects.DataClasses.RelatedEnd.Load()
+37 System.Data.Objects.DataClasses.RelatedEnd.DeferredLoad()
+8032198 System.Data.Objects.Internal.LazyLoadBehavior.LoadProperty(TItem
propertyValue, String
relationshipName, String
targetRoleName, Boolean mustBeNull,
Object wrapperObject) +85
System.Data.Objects.Internal.<>c_DisplayClass72.<GetInterceptorDelegate>b__1(TProxy
proxy, TItem item) +101
System.Data.Entity.DynamicProxies.Community_39641A615E1AD4E19D637735C7A1EBEE61BF70BF579CDD4EBB0267E6636BEC62.get_Videos()
+55 Rdx.Web.UI.AppCode.Controllers.CDController.GetCDModel(SearchParams
searchParams, Int32 page, Boolean
isSorting) in
D:\Solutions\RDX\Rdx.Mvc\src\app\Rdx.Web.UI\AppCode\Controllers\CDController.cs:365
Rdx.Web.UI.AppCode.Controllers.CDController.Show(Int32
cid, Int32 bid) in
D:\Solutions\RDX\Rdx.Mvc\src\app\Rdx.Web.UI\AppCode\Controllers\CDController.cs:70
lambda_method(Closure , ControllerBase
, Object[] ) +145
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase
controller, Object[] parameters) +17
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext
controllerContext, IDictionary2
parameters) +208
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext
controllerContext, ActionDescriptor
actionDescriptor, IDictionary2
parameters) +27
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12()
+55 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter
filter, ActionExecutingContext
preContext, Func1 continuation) +263
System.Web.Mvc.<>c_DisplayClass17.b_14()
+19 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter
filter, ActionExecutingContext
preContext, Func1 continuation) +263
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14()
+19 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter
filter, ActionExecutingContext
preContext, Func1 continuation) +263
System.Web.Mvc.<>c_DisplayClass17.b_14()
+19 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter
filter, ActionExecutingContext
preContext, Func1 continuation) +263
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14()
+19 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter
filter, ActionExecutingContext
preContext, Func1 continuation) +263
System.Web.Mvc.<>c_DisplayClass17.b_14()
+19 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext
controllerContext, IList1 filters,
ActionDescriptor actionDescriptor,
IDictionary2 parameters) +191
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext
controllerContext, String actionName)
+343 System.Web.Mvc.Controller.ExecuteCore()
+116 System.Web.Mvc.ControllerBase.Execute(RequestContext
requestContext) +97
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext
requestContext) +10
System.Web.Mvc.<>c_DisplayClassb.b_5()
+37 System.Web.Mvc.Async.<>c_DisplayClass1.b_0()
+21 System.Web.Mvc.Async.<>c_DisplayClass81.<BeginSynchronous>b__7(IAsyncResult
_) +12 System.Web.Mvc.Async.WrappedAsyncResult1.End()
+62 System.Web.Mvc.<>c_DisplayClasse.b_d()
+50 System.Web.Mvc.SecurityUtil.b__0(Action
f) +7
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action
action) +22
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult
asyncResult) +60
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult
result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
+8841105 System.Web.HttpApplication.ExecuteStep(IExecutionStep
step, Boolean& completedSynchronously)
+184
**UPDATE 2: My Application_EndRequest is getting hit twice. What might cause that to happen? **
STACK on first hit.
Nhs.Web.UI.DLL!Nhs.Web.UI.Global.Application_EndRequest(object sender = {ASP.global_asax}, System.EventArgs e = {System.EventArgs}) Line 58 C#
System.Web.dll!System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() + 0x95 bytes
System.Web.dll!System.Web.HttpApplication.ExecuteStep(System.Web.HttpApplication.IExecutionStep step = {System.Web.HttpApplication.SyncEventExecutionStep}, ref bool completedSynchronously = true) + 0x4c bytes
System.Web.dll!System.Web.HttpApplication.ApplicationStepManager.ResumeSteps(System.Exception error) + 0x13e bytes
System.Web.dll!System.Web.HttpApplication.System.Web.IHttpAsyncHandler.BeginProcessRequest(System.Web.HttpContext context, System.AsyncCallback cb, object extraData) + 0xad bytes
System.Web.dll!System.Web.HttpRuntime.ProcessRequestInternal(System.Web.HttpWorkerRequest wr = {System.Web.Hosting.ISAPIWorkerRequestInProcForIIS6}) + 0x1a2 bytes
System.Web.dll!System.Web.HttpRuntime.ProcessRequestNoDemand(System.Web.HttpWorkerRequest wr) + 0x7d bytes
System.Web.dll!System.Web.Hosting.ISAPIRuntime.ProcessRequest(System.IntPtr ecb, int iWRType) + 0xfd bytes
[Appdomain Transition]
[Native to Managed Transition]
STACK on second hit
Nhs.Web.UI.DLL!Nhs.Web.UI.Global.Application_EndRequest(object sender = {ASP.global_asax}, System.EventArgs e = {System.EventArgs}) Line 58 C#
System.Web.dll!System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() + 0x95 bytes
System.Web.dll!System.Web.HttpApplication.ExecuteStep(System.Web.HttpApplication.IExecutionStep step = {System.Web.HttpApplication.SyncEventExecutionStep}, ref bool completedSynchronously = true) + 0x4c bytes
System.Web.dll!System.Web.HttpApplication.ApplicationStepManager.ResumeSteps(System.Exception error) + 0x13e bytes
System.Web.dll!System.Web.HttpApplication.ResumeStepsWaitCallback(object error) + 0x1e bytes
mscorlib.dll!System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(object state) + 0x2d bytes
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool ignoreSyncCtx) + 0xb0 bytes
mscorlib.dll!System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() + 0x5a bytes
mscorlib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch() + 0x147 bytes
mscorlib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() + 0x2d bytes
[Native to Managed Transition]
[Appdomain Transition]
[Native to Managed Transition]

Answer 1

Try it
For(typeof(WebEntities)).LifecycleIs(InstanceScope.Hybrid);
Global.asax
protected void Application_EndRequest(object sender, EventArgs e) {
ObjectFactory.ReleaseAndDisposeAllHttpScopedObjects();
}
StructureMap will store the context every time that you do the access
var db = ObjectFactory.GetInstance<WebEntities>();