Re: [service-orientated-architecture] Re: if f(x) changes, do you version the service?

[Stanley Stanev]

you still want to deprecate interfaces, you do not want to support old versions forever... you notify customers, give them time to start using the new ones, and stop supporting deprecated ones at the specified time ofcourse, all above in case you are not able to handle things without contract change Stanley Stanev MomentumSI Jerry Zhu wrote: --- Gregg Wonderly <[EMAIL PROTECTED]> wrote: > I think that interface based access is a key feature > of a well designed SOA. > There must be an interface (like or implementation) > description which properly > and completely identifies the type of data going in > and out of a service operation. It should be possible for a client of that service to detect an > incompatibility and it should be possible for a > service to assert an incompatable change if needed. > > These things make it much more likely that > incompatibilities do not create imaginary (service responds okay to invalid request) or incorrect operations service misinterprets data and acts inappropriately) in your SOA. > > Gregg Wonderly > With COM, interfaces never change if published, new functionalities are exposed through new interfaces to the COM object. So it won't break current clients who won't use newly added interfaces while new clients may use the new interfaces. So nothing breaks. THis mechanism could be implemented in Services that have multiple interfaces. Jerry __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- ---------------------------------------- Stanimir Stanev (Stanley) Senior Java Developer www.stanev.com ---------------------------------------- __._,_.___ SPONSORED LINKS Computer software program Computer software spy Computer job Database software Discount computer software Your email settings: Individual Email|Traditional Change settings via the Web (Yahoo! ID required) Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe __,_._,___