Re: Create indipendent library for manage read/write operation for different content

From: Evgeny Ryabitskiy (evgeny.ryabitski..mail.com)
Date: Mon Jun 21 2010 - 19:00:38 UTC

  • Next message: Lucas Holt: "Re: Strange Cayenne problem"

    Hello!

    I can see same problems I have met almost a year before.
    Also have module architecture...

    First of all don't use Configuration.initializeSharedConfiguration(
    fileConf );
    It's not for module applications...

    You could use something like this:

    Configuration conf = new DefaultConfiguration("module1-cayenne.xml");
    conf.initialize(); //mandatory. Means "load and parse my xml".
    DataDomain module1Domain = conf.getDomain(); //actually it's a
    factory for DataContext based on configuration
    DataContext module1Ctx = module1Domain.createDataContext(); //here we
    go! we got context for module1

    Evgeny.

    2010/6/21 mr.abanjo <mr.abanj..mail.com>:
    > Hi,
    > i'm working with a lot' of web sites. Most of them must connect to the some
    > databases to read / write data.
    > So, for every kind of "content", i've created a library (jar) that manages
    > the database's operations.
    > For example,  user, news, meteo ecc.. are managed in different libraries
    > included in different war (one for each webapp).
    > In this way, i have a single code to mantain, and if i must fix some error i
    > can change the code in a single place, and all webapps get the fix when i
    > recreate the war.
    > Now, the problem is that i want to let the library to be indipendent from
    > the webapps that use it. In the jar i put the cayenne.xml and the
    > corresponding datamap, but if a webapp need to load different kind of data
    > (es meteo, and news) in the war i have more than one "cayenne.xml" file.(es
    > meteo_cayenne.xml, news_cayenne.xml).
    > I can use different names for them but what's happen when i call:
    >
    >  Configuration.initializeSharedConfiguration(  fileConf  );
    >
    > for each file?
    > Is this the right way?
    >
    > Also i can leave the datamap in the library, and the cayenne.xml file in the
    > webapp, using different "domains" declared in it. But in this way, the
    > library is not completly indipendent. What i want to obtain is that the
    > webapp don't know nothing about a database/cayenne (except declaring the
    > jndi connection).
    > There is a way to reach this objective?
    >
    > Thanks,
    > Davide
    >



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