[Top] [All Lists]

Re: [ontolog-forum] The Open Group SOA Ontology

To: "[ontolog-forum]" <ontolog-forum@xxxxxxxxxxxxxxxx>
From: "Len Yabloko" <lenya@xxxxxxxxxxxxx>
Date: Fri, 18 Jul 2008 14:37:48 +0000
Message-id: <W908621584394611216391868@webmail8>
John,     (01)

>Petri nets are a good message-passing model, which subsumes finite
>state machines, flow charts, and many kinds of concurrent processing
>as special cases.     (02)

I found (http://workflow.healthbase.info/) following argument regarding Petri 
nets quite relevant to this discussion:
"...States are not necessarily related to activities or
events. This means that traditional object life-cycle models are inadequate.
Traditional (Petri-net based) models of object life-cycles model closed systems
and so assume that a state results from a transition."    (03)

I might add that REST-based interaction by definition limits the scope of state 
to single interaction. I can't help but to recall 2000 movie called "Momento" 
in which main personage is afflicted by brain disorder preventing any new 
memory from being formed.     (04)

I believe that in principle stateless protocols are not sufficient to support 
SOA. The alternative approaches are generally known as "distributed shred 
memory" had been researched for a long time, but were not economically feasible 
until now.    (05)

Message Archives: http://ontolog.cim3.net/forum/ontolog-forum/  
Subscribe/Config: http://ontolog.cim3.net/mailman/listinfo/ontolog-forum/  
Unsubscribe: mailto:ontolog-forum-leave@xxxxxxxxxxxxxxxx
Shared Files: http://ontolog.cim3.net/file/
Community Wiki: http://ontolog.cim3.net/wiki/ 
To Post: mailto:ontolog-forum@xxxxxxxxxxxxxxxx    (06)

<Prev in Thread] Current Thread [Next in Thread>