How to force HttpModule Init() method call for all new thread

Question

I do not have experience in developing asp.net applications.

I want to develop an web application that uses a Componente COM with SxS registration-free.

Following this MSDN Article, Http Module I implemented an HttpModule

    public class SyncModule : IHttpModule
{    
    private MyEventHandler _eventHandler = null;

    public void Init(HttpApplication app)
    {
        app.BeginRequest += new EventHandler(OnBeginRequest);

// Code that enable COM SxS registration-free
        EnableSxSForThisThread_with_CreateActCtx();

        int id = System.Threading.Thread.CurrentThread.ManagedThreadId;
        Debug.WriteLine("MyModule Thread Id: " + id);
    }

    public void Dispose() {    }

    public delegate void MyEventHandler(Object s, EventArgs e);

    public event MyEventHandler MyEvent
    {
        add { _eventHandler += value; }
        remove { _eventHandler -= value; }
    }

    public void OnBeginRequest(Object s, EventArgs e)
    {
        HttpApplication app = s as HttpApplication;
        int id = System.Threading.Thread.CurrentThread.ManagedThreadId;
        Debug.WriteLine("OnBeginRequest Thread Id: " + id);
        Debug.WriteLine("OnBeginRequest: Hello from OnBeginRequest in custom module.<br>");
        if (_eventHandler != null)
            _eventHandler(this, null);
    }

Notice that Print Thread ID.

public void Init(HttpApplication app)
{
...
    int id = System.Threading.Thread.CurrentThread.ManagedThreadId;
    Debug.WriteLine("MyModule Thread Id: " + id);
}

And I linked with my web application putting this inside 'Web.confg'

<httpModules>
  <add name="MyModule" type="MyModule.SyncModule, MyModule" />
</httpModules>

I run my web application and I can call the componente COM with sucess, but only for the same thread that runs HttpModule Init.

If I click at button to run again the thread that uses COM change and fail because HttpModule Init() was not called.

How to detected all new thread to call Init() and CreateActCtx correctly? Is it possible?

score 0 · Answer 1 · answered Apr 16 '14 at 19:57

0

Consider using a boolean flag decorated with the [ThreadStatic] attribute, like this.

[ThreadStatic]
static bool _hasInitBeenCalled;

On every event, check to see if that flag is true. If it is not, run your init code and then set the flag to true. The variable is, in essence, unique for every thread.

answered Apr 16 '14 at 19:57

Nathan A

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I tried to add this and ObjectToEnabledSxS as HttpModule class attribute. On start up thread id 5 and 10 initialize and a thread id 2 call Dispose() of ObjectToEnabledSxS initialized by thread id 5. I am using System.Threading.Thread.CurrentThread.ManagedThreadId to get thread id. Maybe HttpModule dies and GC call Dispose()? – Cobaia Apr 16 '14 at 21:36
My ObjectToEnableSxS calls ActivateActCtx that return a cookie that uniquely identifying a specific, activated activation context. The Thread Id 5 and 10 return the same value for the cookie. ActivateActCtx http://msdn.microsoft.com/en-us/library/aa374151(v=vs.85).aspx – Cobaia Apr 16 '14 at 21:58

How to force HttpModule Init() method call for all new thread

1 Answers1