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COSMOS Design 198553

This page is for discussing the design of bugzilla 198553.

Design Considerations

  • We would like to have clean layers in the design. The web services layer needs to be distinct from the actual implementation of the catalog itself.
    • We would like to be able to "bind" to different underlying implementations. For COSMOS in open source, can we use a simple flat file or do we need a relational DB?
  • In the case of COSMOS and CMDBf, we would NOT choose to expose the MDR via WS-RC.
  • What is the mapping of SML onto the schema of the RC?
    • If this is a simple mapping, e.g. <EntryRef> = <SMLRef>, <ResourceRef> = <SMLRef w/EPR>, or something like that, can we simply use the existing SML repository that we have now and expose WS APIs that exchange RC entries via an XSLT? SML to WSRC Mapping
  • The WS-RC spec talks about the use of WS-R
  • Do we need a flat file representation, relational, or both?
    • We think both
  • What additional dependencies are we bringing in?
    • 3rd party code, e.g. xerces, xpath..
      • Currently looking at Qexo as the XQuery engine for this effort.
        • Qexo is available as part of the KAWA framework. It is freely available under the X11/MIT License. We will need to investigate this license to see if it will work for this effort.
        • The web site for Qexo is http://www.gnu.org/software/qexo/
        • I have given this information to Mark Weitzel for submission and approval.
    • JVM et..


  • What parts of the spec will we not implement?
    • 3.6.4: Don't need to support meta-epr.
  • Would prefer an API that does not require intimate knowlege of the resources in the catalog. XPath is not a good choice for this.

Applications of WS-RC in COSMOS

  • Management Domain
  • Data Broker
    • The remote APIs will be WS-RC APIs

Use Cases

Action Items / ToDos

  • David: First cut at SML - RC mapping
  • Jimmy/Mark: Map RC onto the Domain and Data Broker use cases


Time Line



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