Morning Coffee 76

  • Dare Obasanjo sez Cool URIs Don’t Change. He’s got other versioning advice, but that’s the main takeaway. Good advice that dovetails nicely with “It’s the URI, Stupid“.
  • I usually agree with Jack van Hoof’s stuff, but I don’t agree with his thoughts on loosely coupled transaction processing. It’s much better than suggesting the use of 2PC system like WS-AT, but when he writes that “by design every action has a compensating action to undo the original action” I am reminded of Pat’s old post Why I hate the phrase “Long Running Transactions”. Personally, I’m a fan of using the Tentative Operation or Reservation pattern, described by John Evdemon. Note the lack of a transaction coordinator in that pattern.
  • Speaking of service anti-patterns, I wonder how we rationalize the following two statements, both from Microsoft, in documents published by my old team:
    • “CRUD operations are the wrong level of factoring for a Web service. CRUD operations may be implemented within or across services, but should not be exposed to consumers in such a fashion. This is an example of a service that allowed internal (private) capabilities to bleed into the service’s public interface.” John Evdemon, Principles of Service Design: Service Patterns and Anti-Patterns, Readings in Service Orientation
    • “It is very common for Entity Services to support a create, read, update and delete (CRUD) interface at the entity level, and add additional domain-speciic operations needed to address the problem-domain and support the application’s features and use cases.” Shy Cohen, Ontology and Taxonomy of Services in a Service-Oriented Architecture, Journal 11
  • Ian Thomas wonders Does ERP suck? In a word: Yes! 😄 Seriously, I’m a strong believer in what Ian alternatively calls “unbundling” and “disaggregation” of monolithic enterprise systems – ERP is the most glaring example of such systems.
  • Jamie Cansdale is figuring out how to host Silverlight’s CLR outside of the browser. He’s already got a console runner up and running. He’s working of adding “Test With Silverlight” option to TestDriven.NET. You go Jamie.
This entry was posted by DevHawk on May 10, 2007. It was posted in Morning Coffee. It was tagged Silverlight and SOA.

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