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Ke Jin  
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 More options Jun 1 2005, 12:19 pm
Newsgroups: comp.object.corba
From: "Ke Jin" <ke...@borland.com>
Date: 1 Jun 2005 09:19:10 -0700
Local: Wed, Jun 1 2005 12:19 pm
Subject: Re: What is Corba used for?

Douglas C. Schmidt wrote:
> Hi Ke,

> >> You have brought two issues in this thread:

> >> 1. Generated header file names unification crossing foreign orbs. I
> >> don't call this "portability" to avoid confusion with next issue. For
> >> this unification, I said, I was just "guessing" why folks defined C++
> >> mapping didn't put this seemingly trivial thing in the specification.

> Even POSIX standardizes header files.  This should be done for CORBA,
> as well.  If it's so trivial it should be a no-brainer to standardized.

Again, the 4th times: I was "guessing"!! Also, pls read considerations
I put in previous post. Besides, I don't recall POSIX standard needs to
deal with header files generated from an user specified interface file.
Pls enlight us!

> >> * OMG is not a right organization to head this effort. It should go to
> >> Opengroup, ISO, IEEE, etc..

> Those organizations haven't stepped up to the plate to do this for
> anything except C.  OMG is as good as a place as any.

If IETF, TMF, and especially W3C also doing the samething and saying
"we are as good as a place as any", do you agree?

> >> * It is easy to construct an OS portable layer sufficient for one
> >> ORB or few applications. But, it is non-trivial at all to generize
> >> this.

> It's non-trivial, but it's doable.

Now, you start to agree "it is non-trivial"!? It is definitly doable,
and has been repeatly independently done for many years, many times, by
many people, in many commercial products and student projects. But, to
"standardize" this be able to meet reasonably generic application needs
is more than to implement it for few specific applications and few
specific platforms.

> >> * It damages CORBA.

> Huh?  You need to explain this better - it makes no sense at face
> value, and is one of the reasons why CORBA is losing out to other
> middleware technologies.

See previous post. Also, I don't see other comparable "middleware"
technologies "standardized" this. Which one? J2EE and .NET do
standardize their system interfaces. However, they are both (claimed to
be) middlewares, as well as programming environment/platforms. If you
are really ambitious to extend CORBA beyond middleware scope to become
a programming environment/platform as well, you should:

* Make it clear in OMG, especially to most members and AB. This is not
a small move. and it should be done top down, starting from an overall
architecture vision, and the foundition hierarchy, rather than bottom
up, starting from a specific system interfaces without knowing whether
and where it would fit in within the final architecture.

* At least define your system interfaces using IDL, instead of language
specific;

Good luck!
Ke

> Take care,

>         Doug
> --
> Dr. Douglas C. Schmidt                       Professor and Associate Chair
> Electrical Engineering and Computer Science  TEL: (615) 343-8197
> Institute for Software Integrated Systems    WEB: www.dre.vanderbilt.edu/~schmidt
> Vanderbilt University, Nashville TN, 37203   NET: d.schm...@vanderbilt.edu


 
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