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Failed and temporary abandoned attempts because of being busy...

"Steve Pietrykoski" <steve@SpamIsLame.com> ???????/???????? ? ????????
?????????: news:39EB8577.8240549@SpamIsLame.com...
> If you would, please add to this thread if you've attempted to use MIDAS
> with a threading model other than single-threading.  Indicate the
> version of BCB you are using, whether you are using "standard" RDM's or
> MTS modules, and the result of your attempt: success, home-grown
> workaround, still looking for solution, or abandoned attempt.  Thanks
> for any feedback you provide.
>
> Steve Pietrykoski

I managed to get it multi threaded by putting the standard RDM in a DLL and
connecting to it by use of  the socket server.
I think dcom should also work.
BCB4.0

Klaas Wolters

Hi Klass,

Thanks for your response.  I have a couple of questions about your
technique if you don't mind:

Do you still have a server executable?  If not, how is your COM object
registered?

Is one instance of your DLL created for each connection? 
Do you (or could you) have any data that remains in the server even
without any connections?  (For example, some large array of data shared
by all users).

Thanks for your help,
Steve

Klaas Wolters wrote:
> 
> I managed to get it multi threaded by putting the standard RDM in a DLL and
> connecting to it by use of  the socket server.
> I think dcom should also work.
> BCB4.0
> 
> Klaas Wolters

I gave up a while ago after spending almost a week in  tests. It took a week
as I could not believe this basic functionality was not working. I was
blaming myself for being stupid, and missing something obvious. Did not try
to create any workarounds as I feel three tier is complicated and fairly
unproductive environment even without workaraunds... Additionally I am no
expert in ATL and COM ...
In my tests I was using standard RDM's and tried different connections
(sockets, DCOM) with no luck.
Started testing concurrency using long running SQL statements against
Interbase, ended with "while true"loops and sleeps ...
Used both BCB 4 and 5.

Girts Ziemelis


"Steve Pietrykoski" <steve@SpamIsLame.com> wrote in message
news:39EB8577.8240549@SpamIsLame.com...
> If you would, please add to this thread if you've attempted to use MIDAS
> with a threading model other than single-threading.  Indicate the
> version of BCB you are using, whether you are using "standard" RDM's or
> MTS modules, and the result of your attempt: success, home-grown
> workaround, still looking for solution, or abandoned attempt.  Thanks
> for any feedback you provide.
>
> Steve Pietrykoski

Hi Steve

basic procedure
Create a ActiveX library
Add a Remote data module.

You can register de ActiveX dll with regsvr32 or just with Install shield
Then it gets loaded by the COM system or by the socket server execute.
I have tried to use a debug form in the main library file and discovered
that when al RDM instances make use of that
debug form the second and rest of the instances are very slow.

>Do you still have a server executable?  If not, how is your COM object
>registered?

Another alternative is to load the dll yourself in a main server program and
call the
_Module.RegisterServer(TRUE); function for registering the RDM and on unload
unregister it.

>
>Is one instance of your DLL created for each connection?
>

The DLL gets loaded the first time you make a call to the RDM object.
and from my experience is yust loaded one time.


>Do you (or could you) have any data that remains in the server even
>without any connections?  (For example, some large array of data shared
>by all users).

So any data you create in startup code (#pragma startup) should be global to
any instance of the RDM object.

Klaas