Re: Sharing an ADO connection object between two processes ?
"Herby" <firstname.lastname@example.org> wrote in message
We have a client and server application that run on the same machine.
We want both to participate in the same transaction.
To acheive this I understand they need to share the same connection
The server currently supports a COM interface, as the client passes
across copies of simple data types Strings and integers etc.
But now they want to pass across the client ADO connection object. The
data-writes within the server should then use this connection object
for creating its recordsets etc.
On return to the client - the client may then decide to commit or
rollback via the same connection object.
I understand the server would have a proxy back to the actual
connection object residing in the client address space. Is this going
No offense intended but this is impossible. A connection, is in fact a
TCP/IP connection (for instance) to a SQL database server.
As you might guess, a single process can host one or more TCP/IP
connections, but one connection belongs _exactly_ to one
As soon as you 'share' the connection, you are fooling yourself to think
that you have just one connection. You will have two connection in addition,
there -will- be a lot of marshalling at the runtime of COM.
It's much more performance and security wise, to -not- share connection
objects. Just rely on the perfect resource pooling features of Windows.
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