Path: utzoo!attcan!uunet!mcsun!inria!chorus!violon!rodger
From: rodger@violon.chorus.fr (Rodger Lea)
Newsgroups: comp.os.misc
Subject: Re: "Registry" info wanted
Message-ID: <5431@chorus.fr>
Date: 13 Jun 90 14:25:41 GMT
References: <725.2676656c@waikato.ac.nz>
Sender: rodger@chorus.fr
Reply-To: rodger@violon.chorus.fr (Rodger Lea)
Organization: Chorus systemes, St Quentin en Yvelines, France
Lines: 40

In article <725.2676656c@waikato.ac.nz>, coms2146@waikato.ac.nz writes:
|> In a local class in operating systems, we are talking about what we call
|> a registry. This "registers" the various facilitys/services made available
|> by the OS, and possibly those of user programs as well. Any programs
|> which wants to use these facilitys has its calls replaced by the
|> linker/loader by registry calls. The registry determines if the program
|> can access these services or not, and if so lets them be used.
|> 
|> What I want to know is if anyone has seen/used any facility that acts
|> like this, or know of any references in the literature? I have heard that
|> there is a networking daemon on apollo systems that acts in a similar
|> matter, but that may be wrong.

The ANSA architecture defines a service similar to this, and a partial
implementation exists in a piece of software called the 'testbench'. They use
the notion of a Trader which is a repository for 'object interface
descriptions'.
This includes the traditional type interface (eg methods) plus a set of
attributes (akin to data-base attributes) that allows users programs to
post service descriptions and for other applications to interact with
the trader to get a 'handle' on those services. In the current implementation
this is carried out by traditional RPC techniques - stub generation etc, so
it's used much like a standard RPC package, however, the ANSA architecture
is just that - an architecture, so the more sophisticated approach (link/load)
would fit into the model.

ANSA is a european ESPRIT project (now called ISA), you can contact them with

	apm@ansa.co.uk




|> 
|> Please respond directly, I'll summarise here if there is enough interest...
|>

sorry, my mail bounced somewhere around the pacific ! :-)
 
rodge