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This is mostly just thinking out loud. I am not proposing anything just
thinking...
A lot of the applications I work on make use of a number of different projects.
Xalan, Xerces, Log4J, Avalon, Cocoon, etc, etc. etc.
The problem I have seen is that when you build an application which makes use of
this many projects, you end up with a complicated and ugly initialization
system.
For example you end up needing the following:
- - Selectively initialize systems based on configuration. IE if you are running
as a servlet enable a background thread pool system but if you are running in
"offline" mode you don't really want this feature.
- - Enable features in your system such as logging. Of course you don't want this
happening too soon because if you enable a feature which hasn't been initialized
you will get unusual behavior.
- - Support initialization via a named target.
- - Terminate initialization if anything wrong happens along the way.
So what I was thinking of doing was coming up with a quick "Initializer" which
uses an XML based configuration file to support hierarchical inialization via
SAX and also acts as a singleton so that your application can gain feedback
about where you are at in your initialization.
IE this would be something like:
[Initializer]
+getInstance(): Initializer //get an instance of the initializer.
+init( String target ): boolean throws Exception
+enabled( String feature ): boolean //return true if a given feature is enabled.
... Of course this would be very simple to develop and would be very simple to
add to existing projects. It would really only need one class (Initializer) and
a given XML file.
Anyway... feedback would be nice.
This would take a basic XML configuration file such as:
<initializer>
<initpath>
<package value="org.openprivacy.reptile.init"/>
</initpath>
<entry name="urn:init/offline">
<level>
<class name="Log4JInitializer">
<enable feature="urn:logging"/>
</class>
<class name="GeneralInitializer">
<verbose>Handling general initialization...</verbose>
</class>
</level>
</entry>
<entry name="urn:init/servlet">
<level>
<class name="ServletInitializer"/>
<level>
<class name="Log4JInitializer">
<enable feature="logging"/>
<requires system-property="log4j.configuration"/>
</class>
<class name="GeneralInitializer"/>
<class name="ContentFeedTasksInitializer"/>
</level>
</level>
</entry>
</initializer>
- --
Kevin A. Burton ( [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] )
Cell: 408-910-6145 URL: http://relativity.yi.org ICQ: 73488596
Our nation should be split into warring factions, each ruled by a warlord who
receives messages from God.... it has *got* to be better than this stupid
Electoral college!
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