Re: Ada in Debian: dropping support for the Distributed Systems Annex

[Per Sandberg <per.sandberg@bredband.net>]

Yes.
I would rephrase it to state SAAB has requested RTI to provide 
Ada-bindings for NDDS and that is a fairly thin binding (Quite close to 
OMGs IDL2Ada specefication)

However the cost for NDDS is quite high at the moment we are talking 
about figures in the magnintude of $1000 + runtime per target CPU.

However DDS is a very powerfull tool for data distrubution.

/Per

Dmitry A. Kazakov wrote:
> On Mon, 28 Jul 2008 17:49:21 GMT, Dr. Adrian Wrigley wrote:
> 
>> In these days of distributed systems and multicore processors, running
>> complex applications, you'd think Annex E support would be universal.
> 
> Well, maybe RPC is too heavy-weight, and problematic for heterogenous
> systems. It represents a client-server, synchronous (OK, there is APC too),
> peer-to-peer, static architecture. Procedural abstraction (RPC) is both
> low-level and expensive. Annex E lacks remote objects, remote types,
> agents, routing, time synchronization, abstracted networking hardware
> support.
> 
>> What's happening here?  It doesn't seem to have been used in any
>> major application (Air Traffic Control, Baggage Handling etc).
>> Obviously ACT isn't recommending it, but why isn't there customer pull?
> 
> For the distributed systems we are designing, we just deploy other
> architectures.
> 
> And AdaCore seems to look to the other side too:
> 
> http://www.adacore.com/2007/12/08/working-with-saab-adacore-and-rti-integrates-support-for-ada-with-dds-compliant-real-time-messaging-middleware/
>