Composite Pattern Proposal with use case example



UML diagram

composite pattern structure

volte use case (target design)

volte use case (current implementation)


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2 Comments

  1. Kevin Scaggs

    We probably need to work through the subclasses here.   A few quick questions follow:

    • I would not think that Site is a subclass of resource.   I assume site is a location (address, lat/long, or whatever).   So a resource can be at a site, and this can be depicted via a simple association.
    • Is an Nsd a subclass of ResourceComposite?
    • A Service is a generalization for ServiceComponent and Service Composite?   Should one of these be composite, and the other atomic?
    • What is meant by the dotted directional line to the left of ServiceComponent?

    1. Xu Yang

      Hi Kevin, I'm not fully involved in the discussion here, but here are some quick replies:

      • "Site" may not be a proper name here, but it refers to resource part of a "SiteService". My current understanding is that it's intention is not solely describing the location information.
      • We consider NS as a composite of different VNFs and VLs, that's the reason why it's a composite resource.
      • "ServiceComponent" here is intended to serve the role of atomic service, and the "ServiceComposite", as the name shows, serves the role of composite service.
      • It's for information, make it more clearer that the "ServiceComponent" can refer to atomic/composite resources, e.g., Nsd, Vnfd, etc. I think the hierarchy also shows this information though.