Re: [service-orientated-architecture] Re: What is a "well defined interface"?

[Keith Harrison-Broninski]

Anne Thomas Manes wrote: The advice I give to my clients is to start their reuse efforts with infrastructure functionality -- things like authentication, authorization, auditing, cryptography, logging, monitoring, caching, etc. One of the things I like best about SOAP is that it enables clean separation of infrastructure from business logic via the SOAP mediation model. Thanks for this Anne.  You're quite right, of course - infrastructure is well suited to reuse via SOA techniques.  However, to my mind this raises yet another set of questions.  Your examples, particularly that of terrorist checking, suggests that some aspects of infrastructure are business logic.  In fact, which types are not?  All the functions you list above are required by the business, or the IT department would have no justification for implementing them. Perhaps there are different "types" of business logic, the infrastructure "type of business logic" being logic that is driven by organizational concerns rather than process design issues - a matter of policy rather than procedure, if you like.  If so, your viewpoint as expressed above suggests that the former type of functionality may be better suited to re-use via SOA. It is interesting to consider this question from a process design point of view - it suggests the use of an aspect-oriented approach to process design to capture such cross-cutting concerns.  Aspect-orientation has not been a feature of process design techniques to date.  Perhaps it should be ... -- All the best Keith http://keith.harrison-broninski.info SPONSORED LINKS Computer software Computer aided design software Computer job Soa Service-oriented architecture YAHOO! GROUPS LINKS  Visit your group "service-orientated-architecture" on the web.    To unsubscribe from this group, send an email to:  [EMAIL PROTECTED]    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.