7 Replies Latest reply: Feb 28, 2014 3:50 AM by Byron Van Wyk RSS

    Model driven architecture

    Eva Polini

      Hi,

      Is there someone developing with a model driven architecture (MDA)? How far are you? did you find some limits due to the tool?

      Am I alone on that subject??

       

      I will be happy to share with people working on that.

       

      Eva

        • Re: Model driven architecture
          Byron Van Wyk

          What do you mean MDA? Developing in the sense of setting up an application layer, a data layer and then feeding that into a QVW? So a proper architecture for enterprise deployments?

            • Re: Model driven architecture
              Friedrich Hofmann

              Hi Byron and Eva,

               

              if it is so (like Byron suggested), then I'll be happy to also do my little part in being unhelpful ;-)

              In our company, the architecure is three-tier:

              - First comes a qvw without GUI, loading data from the Database and saving qvd_files.

              => Then comes a "DataModel" that loads all the qvd_files and builds a data_model

              => That is then loaded (BINARY) into (most of) the apps.

              Best regards,

               

              DataNibbler

            • Re: Model driven architecture
              sujeet singh

              This term is the same as Byron

                • Re: Model driven architecture
                  Friedrich Hofmann

                  Hi,

                   

                  as far as limits - so far I am conscious of only one real limit - well, rather a drawback, not an absolute limit - the size. A data_model of that kind can get huge and especially if people are connected via VPN and open an app using it, that might turn out troublesome.

                  You can, however - and we have tried that - create several different smaller DataModels, for just a few apps.

                  One thing we thought of trying, but haven't succeeded with yet, is

                  => making a small DataModel that is sufficient for some apps and then

                  => loading it BINARY into a secondary bigger DataModel and adding tables as per requirement for other apps.

                   

                  HTH,

                   

                  DataNibbler

                • Re: Model driven architecture
                  Eva Polini

                  Hi guys,

                  Sorry I was away!! great to see answers !!Ok, I will try to explain clearly.

                  My Goal is to be able to load any new source just with a parameter file update.

                  The script will load a metamodel. The metamodel sctrucure comes from the script, metamodel data comes from the parameter file.

                  After the script will load all the data.

                   

                  I did that for a small project. I was working despite I had some conceptualization issues. and It just adapt to the project, not enough general to be usefull.

                  My points: could we do all operations on this way? do we need to process operations in a special order? if yes, how to find the best order to optimize it? any other limitations?