[POLL] loading XML configurations from filesystem

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Tue May 20 2008 - 10:38:48 EDT

  • Next message: Fixe106: "Re: [POLL] loading XML configurations from filesystem"

    Wanted to check if anybody loads "cayenne.xml" and related Map and
    Node XML files from locations other than default two: CLASSPATH and
    WEB-INF/ ? More specifically:

    1. anybody uses FileConfiguration?
    2. anybody uses DefaultConfiguration (with 'addResourcePath' or
    without) to directly reference file in the filesystem (vs. referencing
    resources in classpath)?
    3. anybody places DataMap / DataNode files in (jar) directories
    outside of the directory where "cayenne.xml" is located?

    I personally don't, as all these approaches lead to non-portable
    applications that make unwarranted assumptions about the environment.
    I think cases requiring to open cayenne.xml via the application UI are
    special enough to warrant a custom configuration.

    Some background. I am planning a rework of the config package to
    include support for merging of multiple Cayenne projects into a single
    "virtual project" in runtime (hence enabling multiple "persistent
    units" in the app). So I am looking to simplify this task and stop
    supporting edge cases that are not widely used, and also change the
    basic algorithm of resolving files relative to cayenne.xml to ensure
    they are actually relative to the URL within a JAR or class folder
    where cayenne.xml is found (so that we can have multiple cayenne.xml
    files and avoid conflicts when loading dependent XML files of those).

    I think there is a lot of benefit in keeping the built-in choices of
    file lookup down to just a few basic ones, and of course the users can
    still write their own Configuration extensions to address non-standard
    requirements.

    Andrus

      



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