Hi,

Assume I have a system component with two ports:

* Is it legal to let both ports accept in-messages of the same
type (or even to let the system component have two instances of the same port
type)?
* In case it is legal, should a message that matches the common
type be inserted into both ports or is the behavior undefined?


Best regards,

Stefan Karlsson

ext Stefan Karlsson wrote:

> Hi,
>
> Assume I have a/ system/ component with two ports:
>
> * Is it legal to let both ports accept in-messages of the same
> type (or even to let the system component have two instances of
> the same port type)?
>

Yes.

> * In case it is legal, should a message that matches the common
> type be inserted into both ports or is the behavior undefined?
>

It should only be inserted into one port queue. Which one that is, will depend
on your SA implementation and the purposes of your ports. If the SA cannot
figure out, to which port the message _really_ belongs, then I guess you
modelling of the interfaces is off and you should only have a single port.

Also, remember that decoding of messages (and hence checking of which type a
message is) takes place only _after_ the message has been inserted into the port
queue. Of course, nobody will stop you from running a decoder in your SA, but
that is certainly not the canonical way of doing things.

Regards

Stephan Tobies

--
Stephan Tobies Sr. Research Engineer, Nokia Research Center
~ Mobile Networks Lab, Protocol Engineering Group
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Hi,

Yes, it is legal.

The behaviour is determined by the implementation of the System Adapter.
The SA needs to call triEnqueueMsg with the component, that should receive the
message.

Regards,
Matthias Jung
--
See the Newest Innovations in Requirements Management.
Learn more about DOORS 7.1 at www.telelogic.com


Dr. Matthias Jung
Application Development
Telelogic Deutschland GmbH, Otto-Brenner-Str. 247 , 33604 Bielefeld, Germany
Phone: +49(521)14503-33
Fax: +49(521)14503-50
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Sent: Monday, August 02, 2004 2:18 PM
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Subject: System ports


Hi,
Assume I have a system component with two ports:
Is it legal to let both ports accept in-messages of the same type (or even to
let the system component have two instances of the same port type)?
In case it is legal, should a message that matches the common type be inserted
into both ports or is the behavior undefined?


Best regards,
Stefan Karlsson