Re: [TM4J-users] Re: TM4J and Software Architecture

[Andreas F. <And...@gm...>]

Hi Bret,

thanks for your interesting answer.

I´m gonna give your "business layer" of the sass aplication a good read in a
short while and then see, how many of my own classes i have to implement on
this.

Greetings to you
Andreas

> --- Ursprüngliche Nachricht ---
> Von: Bret Cohen <bre...@ya...>
> An: tm4...@li...
> Betreff: [TM4J-users] Re: TM4J and Software Architecture
> Datum: Tue, 14 Jun 2005 18:02:15 -0700 (PDT)
> 
> Andreas,
> 
> I would say that the "database layer" as you call it,
> is handled by TM4J, including the indexes and tologx
> packages that allow data to be extracted from the
> topic map.
> 
> The business model layer, if there is one, would be
> handled by your own classes. In the application I
> created, which you now have, it is handled by my saas
> classes.
> 
> Pankoucke handles a different layer. I think I've
> referred to that layer as an "abstraction layer",
> though that may not be the best description. It relies
> on the TM4J classes, and possibly on your "business
> model classes", to extract the data from the
> "database"  (really the topic map loaded from either a
> XTM file or a database), and then builds what is
> referred to in the Panckoucke documentation as an
> "abstract model" of nodes and arcs, which is then
> passed to the renderer (the presentation layer). So I
> would probably locate Pankcoucke and its layer between
> the business model layer and the presentation layer.
> 
> Also, you can develop your own abstractors...
> 
> Out of time...
> 
> Bret
> 
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> >    1. TM4J and Software Architecture (3-tier)
> > (Andreas Fleck)
> > 
> > --__--__--
> > 
> > Message: 1
> > Date: Mon, 13 Jun 2005 13:51:39 +0200 (MEST)
> > From: "Andreas Fleck" <And...@gm...>
> > To: tm4...@li...
> > Subject: [TM4J-users] TM4J and Software Architecture
> > (3-tier)
> > 
> > Hi everybody,
> > 
> > i´m currently in the Design phase of the software,
> > which i want to write
> > (the software is a plug-in for Eclipse, which is
> > displaying a Topic Map as a
> > Touchgraph).
> > 
> > I want to use the Pancouke library and the
> > Touchgraph library (similar to
> > TMNav) for my project.
> > 
> > Now, i am pretty confused about the different
> > abstraction layers of my
> > programm.
> > 
> > My software should have a typical 3-tier
> > architecture, like this:
> > 
> > Presentation Model layer
> >         ^
> >         |
> > Business Model layer
> >         ^
> >         |
> > Database layer
> >         ^
> >         |
> > Database
> > 
> > Can somebody maybe tell me under what Panckouke, the
> > TM4J library, the XTM
> > Topic Map and Touchgraph can be filed within such an
> > architecture? And what
> > the equivalent to the database layer might be?
> > 
> > I´m thinking of something like this:
> > 
> > Presentation Model layer (Displaying the Topic
> > Map->Touchgraph libraries)
> >         ^
> >         |
> > Business Model layer     (Filtering the Topic
> > Map->Panckouke)
> >         ^
> >         |
> > Database layer           ??????
> >         ^
> >         |
> > Database                  (XTM File????)
> > 
> > Is this correct? Or is this the complete wrong
> > approach when handling Topic
> > Maps?
> > 
> > I hope you understand what i am trying to say.
> > 
> > Any answer is highly appreciated, as the
> > architecture of the software is
> > really crucial to my project.
> > I am thankful for any thoughts/ideas/statements
> > about this or maybe links on
> > this topic.
> > 
> > Greeting to all
> > Andreas
> > 
> > 
> > 
> > 
> > 
> > 
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