QuickSwitchDatabaseAssistant.py :  » Web-Frameworks » Aquarium » aquarium-2.3 » aquarium » database » Python Open Source

Home
Python Open Source
1.3.1.2 Python
2.Ajax
3.Aspect Oriented
4.Blog
5.Build
6.Business Application
7.Chart Report
8.Content Management Systems
9.Cryptographic
10.Database
11.Development
12.Editor
13.Email
14.ERP
15.Game 2D 3D
16.GIS
17.GUI
18.IDE
19.Installer
20.IRC
21.Issue Tracker
22.Language Interface
23.Log
24.Math
25.Media Sound Audio
26.Mobile
27.Network
28.Parser
29.PDF
30.Project Management
31.RSS
32.Search
33.Security
34.Template Engines
35.Test
36.UML
37.USB Serial
38.Web Frameworks
39.Web Server
40.Web Services
41.Web Unit
42.Wiki
43.Windows
44.XML
Python Open Source » Web Frameworks » Aquarium 
Aquarium » aquarium 2.3 » aquarium » database » QuickSwitchDatabaseAssistant.py
"""Permit RDBM toggling."""

__docformat__ = "restructuredtext"

# Created: Tue Jan  9 14:48:12 PST 2001
# Author: Shannon -jj Behrens
# Email: jjinux@users.sourceforge.net
#
# Copyright (c) Shannon -jj Behrens.  All rights reserved.

from DatabaseAssistant import DatabaseAssistant
import aquarium.conf.AquariumProperties as properties


class QuickSwitchDatabaseAssistant(DatabaseAssistant):
    """Permit RDBM toggling.

    This database assistant class permits a developer to develop for a range
    of RDBM's and then choose which one to use based on a properties file
    configuration.

    If you have not read the rather lengthy and helpful comment in the
    aquarium.database.DatabaseAssistant_ class, please do so before reading
    this.  Afterall, this is a relatively simple subclass of DatabaseAssistant.

    The idea is as follows: go to your copy of ``site-packages/database``
    and make a new directory for each RDBM you wish to support
    (for instance, ``mkdir mysql; mkdir sqlserver``).  Then, inside
    each directory, add a new ``__init__.py`` file (you can copy the one from
    ``$PYTHON_INSTALL_PATH/lib/python2.*/site-packages/aquarium/database``
    provided you change the packageType appropriate, e.g.
    "database/mysql" or "database/sqlserver").  Now you have a place
    to put different "table classes" for your different RDBM's.  Now, go
    edit your ``AquariumProperties`` file (there will be appropriate
    instructions there).  By editing your ``AquariumProperties`` file, you
    can quickly switch between your different table classes (and thusly,
    different RDBM's).

    .. _aquarium.database.DatabaseAssistant:
       aquarium.database.DatabaseAssistant.DatabaseAssistant-class.html

    """

    def getModuleType(self):
        """Tell ``AutoLoader`` what type of modules to autoload.

        ``DatabaseAssistant`` mixes in ``aquarium.util.AutoLoader``.  Here, we
        must override getModuleType_ to tell ``AutoLoader`` which directory to
        import the "table classes" from.

        .. _getModuleType:
           aquarium.util.AutoLoader.AutoLoader-class.html#getModuleType

        """
        return "database." + properties.DATABASE_RDBM
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.