W3C home > Mailing lists > Public > public-ws-chor@w3.org > March 2003

Re: Use case

From: Steve Ross-Talbot <steve@enigmatec.net>
Date: Tue, 18 Mar 2003 09:23:13 +0000
Cc: public-ws-chor@w3.org
To: Assaf Arkin <arkin@intalio.com>
Message-Id: <3E1E62CA-5923-11D7-9D9C-000393AD2AA6@enigmatec.net>


could we get a screen shot of this usecase?


Steve T

On Tuesday, March 18, 2003, at 09:03 AM, Assaf Arkin wrote:

> I would like to submit a use case based on one of the implementations 
> I have reviewed. This use case is interesting since it highlights how 
> one would use Web services technologies like WSDL, WS-Policy, SAML and 
> WS-Choreography even for interactions that are not SOAP enabled.
> Supply Acme Co. has an automated system for fulfilling orders. The 
> supplier works with some customers that have an automated procurement 
> system and both use SOAP to conduct transactions electronically. 
> However, some customers have not automated their system. Acme Co. 
> would like to conduct business with these customers and do so in an 
> automated fashion.
> Acme Co. develops a Web-based front end system for these customers 
> using HTTP and HTML technologies. Customers log into the system using 
> their customer identifier and are able to place orders, track their 
> status and print out invoices. Acme Co. also has a helpdesk which 
> allows customers to conduct transactions offline. A customer may send 
> an order by fax, or call to check the order status, and an Acme Co 
> representative would use the Web-based front end system to perform an 
> online operation on their behalf.
> Acme Co would like to have one definition for all transactions 
> involving its customers regardless of technology. The business 
> semantics are identical whether information is exchanged using SOAP, 
> through the Web-based front-end or with the help of a representative. 
> Acme Co realizes that reducing the number of business processes it 
> needs to support would improve its efficiency.
> Acme Co choses the proxy approach. It defines a single choreography 
> that would be used for all transactions with its customers. The 
> choreography is expressed in the form of WSDL operations that are 
> performed by its order fulfillment service and the customer's 
> procurement service. Protocol bindings and service end-points are 
> defined for those customers that use SOAP. The Web-based front end and 
> helpdesk systems are defined as services that implement the role of a 
> procurement system as defined by the customer process in that 
> choreography. In this particular case it uses SOAP to communicate with 
> fulfillment system.
> Although the Web-based front end is running in the same environment as 
> the order fulfillment service, it is considered to be a customer 
> service. When it exchanges messages it uses the security credentials 
> given to the customer and not those of Acme Co to prevent one customer 
> from learning about orders belonging to other customers.
> This distinction is important. From a technological perspective both 
> Acme Co's and the customer's service run in the same domain of 
> control. However, from a business perspective these are two different 
> domains of controls, and customers are identified as different 
> non-overlapping domains of control. Acme Co manages its policy with 
> regards to each customer in a uniform manner regardless of which 
> technology is used to conduct the transaction or how far SOAP messages 
> have to travel.
> Once completed, Acme Co has:
> - A uniform representation of the choreography between its fulfillment 
> service the the customer procurement service
> - A single business process to maintain
> - The means to support customers that do not have automated processes 
> using the uniform model
> - A mechanism to support its security policies regardless of 
> "location" of the customer service
> arkin
> -- 
> "Those who can, do; those who can't, make screenshots"
> ----------------------------------------------------------------------
> Assaf Arkin                                          arkin@intalio.com
> Intalio Inc.                                           www.intalio.com
> The Business Process Management Company                 (650) 577 4700
Received on Tuesday, 18 March 2003 04:16:25 UTC

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