[ http://issues.apache.org/jira/browse/TORQUE-50?page=all ]
CG Monroe updated TORQUE-50:
----------------------------
Attachment: (was: Generator Override Support.zip)
> Supporting local and add-on Generator "Override" jars
> -----------------------------------------------------
>
> Key: TORQUE-50
> URL: http://issues.apache.org/jira/browse/TORQUE-50
> Project: Torque
> Issue Type: Improvement
> Components: Generator, Maven-Plugin, Documentation
> Affects Versions: 3.2.1
> Reporter: CG Monroe
> Priority: Minor
> Fix For: 3.2.1
>
>
> <From an e-mail proposal talked about on the torque-dev list>
> I've been looking at how to package, document, contribute
> my betwixt map/dtd generation code. As Thomas pointed out,
> it's not truely mainstream Torque but might be a useful
> addon. Anyway, this got me thinking about how to best
> support template and/or generator local modifications or
> add-on.
>
> If the generator build scripts supplied by the Torque
> distro had classpaths that first tried to add any
> *-override.jar files before the distro files, then
> Templates and generator classes could easily be locally
> overriden. This is trivial to do with the Ant
> torque-build.xml. I assume that it would be easy in Maven?
>
> If no *override.jar files exist, it's a standard install.
> But if you've got local changes to implement or want to
> use a supplied add-on, just add *override.jar files to the
> correct directory(s) and use the standard generation
> processes.
>
> IMHO, this seems cleaner than trying to maintain a full
> customized template or generator distros. If a new
> version comes out, just grab the standard, check for
> any gottcha's between it and your modified code, add back
> in your override jars. All the benefits of a new version
> with your local mods included.
>
> In a lot of cases, like changes to sql generation
> templates (e.g. MySQL Table options ) or new db
> adaptor support (like Informix/MSSQL7), this will be
> very easy. These areas don't change a lot or are
> mostly new templates.
>
> It also allows for easier add-on contributions. An add-on
> could be supplied as a set of jars that are simply put in
> the correct directories using common How-To instructions.
> The add-in supplier just needs to document any additional
> settings.
>
> It's not perfect since add-on's can override each other
> and break... but it's better than it was.
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