[omniORB] Do _narrow() always result in net traffic?

[Haarek Ryeng]

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I'm replying to myself, as I think I found the answer.

After browsing the omniorb code, and verifying it with another
orb
(Orbacus for java), I found that the _narrow() call will only
ask the remote object if the cast qualifies for a class cast
exception.

So - there is practically no overhead in calling _narrow()!

-Haarek Ryeng  (thinking loud)


Haarek Ryeng wrote:

> Object reference _narrow() question:
>
> Will a down-casting through the reference
> <reftype>::_narrow(ref) function generate net traffic?
> (unless the ref is of the same as <reftype>)
>
> Reason I ask, is that I'm implementing a data-pushing
> mechanism where it’s convenient to store only references of
> the base class, but to push data to a more specialised class
> – thus needing to down-cast.
> As always – alas – the communication rate is limited.
>
> Haarek Ryeng

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