Re: [soa-rm] Revisiting: Definition of Service Orientation andhow it relates to SOA

[Rex Brooks <rexb@starbourne.com>]

A couple of points I had not arrived at myself. Inline.

At 4:28 PM -0700 5/25/05, Duane Nickull wrote:
>I love this question - very tough to answer ;-)
>
>Metz Rebekah wrote:
>
>>Service Orientation:  "Is that an 'orientation towards services'? If so,
>>who is doing the orienting? Is there another position that would be
>>opposite 'services'? What would we call that?  What's the polar opposite
>>of services?"
>>
>It would be interesting to pose this question to the analysts and 
>press who talk about SOA a lot.
>
>Collected thoughts so far from this TC?
>
>1. The opposite of SOA is duplication of functionality in every 
>application that needs it.  (paraphrased from Joseph's comment on 
>"Re purposing").

This, along with the distinction requiring service and service 
consumer really does a good job of ruling out the "not SOA."

>2. The opposite of SOA is procedural duplication of functionality 
>that is constrained to only being consumed by one process/thread 
>rather than multiple processes and threads.
>3. SOA is more than OO; it is OO with a set of separate elements to 
>address it working over multiple environments.

Yes, and is optionally aggregatable without specific inheritance

>4. A system that is tightly bound where two endpoints can 
>communicate only with each other and not accept any other endpoints 
>into their MEP's may be a bad design but still quality as SOA. 
>Question: If such a system exists and there are dependencies between 
>the endpoints, is it SOA?

Makes sense to me. Yes it is, as long as there is a service and 
service consumer that are otherwise separate (I won't ask that it be 
extended to subsequent multipurposing the service once consumed since 
that would then be within a single system if the original service 
were not involved.)

>I am probably not making sense anymore.  Time to quit....

Me, too.


>Duane


Ciao,
Rex



-- 
Rex Brooks
President, CEO
Starbourne Communications Design
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