Re: DCOM Optimizations in EnterpriseServices

From: Florin Lazar [MSFT] (florinlazar_at_online.microsoft.com)
Date: 03/17/04 

Date: Tue, 16 Mar 2004 16:53:46 -0800

Hi Brian,

First, ServicedComponents don't support (Logical)CallContext.
Second, I personally don't know of any way of disabling what you call "DCOM
optimizations" for very simple methods.

Regards, 

-- 
Florin Lazar - Microsoft - [ http://blogs.msdn.com/florinlazar ]
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"Brian Tyler" <brianmtyler@yahoo.com> wrote in message
news:OgkjUq7%23DHA.1456@TK2MSFTNGP09.phx.gbl...
> Short Question:
> Is there any way to shut off the "DCOM optimization" that is used when
> making a remote call from a .NET client to an ServicedComponent?
>
> Longer Version:
>
> From the recent MSDN article
>
(http://msdn.microsoft.com/msdnmag/issues/04/03/ExceptionsinCOM/default.aspx
> ) and from a blog I found searching around
> (http://staff.newtelligence.net/clemensv/PermaLink.aspx?guid=189), it
> appears that in most cases, Enterprise Services using .NET remoting for
the
> serialization/deserialization and DCOM for the transport when doing remote
> calls to ServicedComponent objects (ie remote .NET COM+ applications).
> However, there appears to be an optimization that takes place when the
> method's API is simple enough (to quote the blog: "with two exceptions: QC
> and calls with isomorphic call sigs").
>
> For example, my test component has two methods:
>
> ShowMessage()
>
> and
>
> ShowMessage(System.Text.StringBuilder b)
>
> The first one is "optimized" and the second one is not.
>
> KEY POINT: When the system is optimized, the LogicalCallContext is
dropped.
>
> If I attempt to get data stored in the LCC in the first method, it does
not
> appear - but it is there in the second method.
>
> For various reasons, I want a consistent behavior where the LCC is
> propogated. I am working on the assumption that it can only be done by
> somehow turning off this optimization. Unfortunately, I can't get rid of
the
> LCC nor can I change the APIs. Any other options?
>
> Thanks
>
> Brian
>
>

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