Asynchronous COM+ Method Calls?

If I have a COM+ method that returns results from a long-running database
query, is there a way to create a version of the method that uses one of the
..NET asynchronous calling patterns? Assume that I can use any technology I
like.

My interest is in creating asynchronous web pages for use in a high-volume
web application. It's a bad idea to block the ASP.NET worker threads by,
for instance, blocking on a COM+ method call.
--
--------------------------------------------------------------------------------
John Saunders | MVP – Windows Server System – Connected System Developer

If I have a COM+ method that returns results from a long-running database query, is there a way to create a version of the method
that uses one of the .NET asynchronous calling patterns? Assume that I can use any technology I like.

My interest is in creating asynchronous web pages for use in a high-volume web application. It's a bad idea to block the ASP.NET
worker threads by, for instance, blocking on a COM+ method call.

Since Windows 2000, COM has supported asynchronous method calls. See http://msdn.microsoft.com/msdnmag/issues/0400/async/.

Note that the implementation for the asynchronous architecture is confined to the proxy, so this should work just fine with COM+
objects.

Personally, I have never used this support, preferring instead to launch a worker thread internal to the COM+ object to do my
asynchronous work. Obviously you can do the same.

Brian

"Brian Muth" <bmuth (AT) mvps (DOT) org> wrote

If I have a COM+ method that returns results from a long-running database
query, is there a way to create a version of the method that uses one of
the .NET asynchronous calling patterns? Assume that I can use any
technology I like.

My interest is in creating asynchronous web pages for use in a
high-volume web application. It's a bad idea to block the ASP.NET worker
threads by, for instance, blocking on a COM+ method call.

Since Windows 2000, COM has supported asynchronous method calls. See
http://msdn.microsoft.com/msdnmag/issues/0400/async/.

Note that the implementation for the asynchronous architecture is confined
to the proxy, so this should work just fine with COM+ objects.

Personally, I have never used this support, preferring instead to launch a
worker thread internal to the COM+ object to do my asynchronous work.
Obviously you can do the same.

Thank you very much. Not only do I not remember seeing that particular
article; I also don't remember hearing any mention of async COM calls.
"There must be something wrong with them", because they're too good to be
true!
--
--------------------------------------------------------------------------------
John Saunders | MVP – Windows Server System – Connected System Developer