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


I like it too, but i think it is more of an SOA maturity model than a RM.  Each layer is a higher level of SOA maturity, with initial SOA beginning in layer 2 (I think) 


From: Chiusano Joseph [mailto:chiusano_joseph@bah.com]
Sent: Monday, May 23, 2005 1:42 PM
To: soa-rm@lists.oasis-open.org
Subject: RE: [soa-rm] David Linthicum Says: "ESB versus Fabric.Stop It!"

Wow that's a very interesting way of looking at this. So starting with Layer 1, the RM would add the concept of a service, and discovery of service endpoints, to traverse to Layer 2. Similarly, to traverse from Layer 2 to Layer 3 the RM would add the concept of a session, then for Level 4 the notion of a choreography or orchestration.
 
I like the sound of that - it seems very valueable for interoperability.
 
Joe
 
Joseph Chiusano
Booz Allen Hamilton
Visit us online@ http://www.boozallen.com
 


From: Vikas Deolaliker [mailto:vikas@sonoasystems.com]
Sent: Monday, May 23, 2005 1:32 PM
To: Chiusano Joseph; soa-rm@lists.oasis-open.org
Subject: RE: [soa-rm] David Linthicum Says: "ESB versus Fabric.Stop It!"

 

One could potentially map the SOA levels discussed in this blog to layers in a SOA-RM.

 

Layer 1: Messaging/Queing with routing and transformation of messages. The endpoints for this layer are transport endpoints.

 

Layer 2: Mediation Layer or Brokering Layer. The endpoints to this layer are the service endpoints. Endpoints are discovered using a discovery protocol (like DNS).

 

Layer 3: Session Layer. The endpoints to this are session endpoints. Session endpoints can be all on one service endpoint or multiple.

 

Layer 4: Process Layer. This is the choreography/orchestration layer at which new services can be developed.

 

The RM then would need to define the notion of protocol data unit that traverses up/down and in between two of these stacks. (analogous to OSI).

 

Thanks

Vikas

 


From: Chiusano Joseph [mailto:chiusano_joseph@bah.com]
Sent: Monday, May 23, 2005 4:19 AM
To: soa-rm@lists.oasis-open.org
Subject: [soa-rm] David Linthicum Says: "ESB versus Fabric.Stop It!"

 

Forwarding a very interesting and pertinent piece[1] from David Linthicum's (CTO of Grand Central) blog, titled "ESB versus Fabric…Stop It!". David also discusses 6 different "levels" of SOA, ranging from simple single point-to-point SOAP messages (Level 0) to SOA that incorporates orchestration (Level 5).

 

Joe

 

 

Joseph Chiusano

Booz Allen Hamilton

Visit us online@ http://www.boozallen.com

 



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