RE: [soa-rm] David Linthicum Says: "ESB versus Fabric.Stop It!"

[Ken Laskey <klaskey@mitre.org>]

In examples I've seen, the intent is to be both closed (but very large) and 
SOA.

Ken

At 11:48 AM 5/27/2005, Peter F Brown wrote:
>Surely there is nothing incompatible with a system being closed (!=SOA) and
>consisting of a range of accessible services, each of which could be SOA.
>Whether something is SOA is surely a question of context and intent
>
>-Peter
>
>-----Original Message-----
>From: Ken Laskey [mailto:klaskey@mitre.org]
>Sent: 26 May 2005 12:43
>To: SOA-RM
>Subject: Re: [soa-rm] David Linthicum Says: "ESB versus Fabric.Stop It!"
>
>This isn't necessarily true because I can have a closed system that has a
>large, varied number of accessible services but no services are allowed from
>the outside world.  Many governance strategies assume this situation.  We
>get back again that if we have one service and one consumer and that service
>is currently sufficient for the needs of the consumer, do we have a SOA?
>
>Ken
>
>
>On May 25, 2005, at 8:48 PM, Rex Brooks wrote:
>
> > Any self-contained system, is by definition, not SOA. It may have any
> > number of functional services within it, but as long as it is
> > self-contained it is not SOA. That's why I keep saying that the atomic
> > unit of SOA is a service AND a service consumer. I guess we have to
> > qualify it to the extent that the systems are essentially separate,
> > even if they may have endpoint interfaces that allow connection and
> > other connections are possible or even occur, but they are not
> > connected as an atomic unit until the service is invoked, or an
> > agreement to allow invocation has been reached.
> >
> > That is of course, just my opinion, even though I state it as if it
> > were fact.
> >
> > Ciao,
> > Rex
> >
>------------------------------------------------------------------------
>------------------
>Ken Laskey
>MITRE Corporation, M/S H305     phone:  703-983-7934
>7515 Colshire Drive                        fax:        703-983-1379
>McLean VA 22102-7508

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   /   Ken 
Laskey                                                                \
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