Re: [soa-rm] What is SOA (Really???) [was: David Linthicum Says:"ESB versus Fabric.Stop It!"]

[Duane Nickull <dnickull@adobe.com>]

All:

I changed the thread name.  It just occurred to me that the next time 
someone Googles David Lithicum, this thread/debate will probably show up 
even though it has nothing to do with him.

D

Ken Laskey wrote:

> 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
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>