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When is impersonation 'on'?

Greetings!

I'm trying to find a good place to call SqlCacheDepende ncy.Start() and
I'm running into some issues. I know this isn't a SQL forum, but this
seems more like an ASP.NET lifetime problem.

I treid Application_Sta rt() but we're running with anon access and
impersonation, and impersonation is not 'on' yet.

I considered impersonating my user in Application_Sta rt() but I'm not
wild about this as I think I'll need the password, etc. I'd rather
keep that out of my app.

I tried overriding Init() in global.asax with the same results as
Application_Sta rt.

I tried Application_Beg inRequest() but we've got some HttpModules that
do database access themselves that use cache. IHttpModule.Beg inRequest
seems to run BEFORE Application_Beg inRequest, so SqlCacheDepende ncy
activity fails. Interestingly, impersonation is ON in
IHttpModule.Beg inRequest!

I tried overriding Init() in the HttpModule but no impersonation.

I can't use Session_Start() because I'm not using session state at
all.

So it looks like the only place I can reliably call
SqlCacheDepende ncy.Start() is in the BeginRequest() method of my FIRST
HttpModule, which places it before any DB/cache activity, with
impersonation on. I'd need to use a singleton pattern to ensure it
only happens once.

Am I missing something? Does this make sense? Gives me the willies...

Thanks to all!

-Brain
Jun 27 '08 #1
0 1016

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