OpenSync API - OSyncObjFormatSink and other ongoing stuff...

Hi,

just committed major changes in the Object Format handling. Those changes are
required to have later a proper implemention of OSyncPluginRessource, a
generic plugin interface to handle different ressource. This is one of the
last missing pieces of the PluginConfigXsd, the common plugin configuration
schema:

http://opensync.org/wiki/PluginConfigXsd

Please stay with r3307 for some more hours if you're doing some serious
development. Since everything beyond r3307 requires changes on every OpenSync
Plugins and Frontends. Luckily those changes will make soon lots of redundant
code in plugins completed obsolete. So porting to the final changes will turn
out in pressing your delete key more often then your Return key ;)

Plugin Developers:
Most of the reporting of available OSyncObjTypeSink and which OSyncObjFormat
are supported (which is done within the plugin initialize funcition), will be
done on the fly on the OpenSync engine side. Since the generic configuration
will allow this features.

You might have to add some lines code in your plugin discovery function, which
have to be done anyway. If you have a look on OpenSync 0.40 TODO list:
http://opensync.org/wiki/TODO
.. most of the oustanding stuff is about the capabilities support which should
be handled in the plugin discovery function. More information about this
later...

Frontend Developers:
Please have a look on
http://opensync.org/wiki/PluginConfigXsd and check the OSyncPluginConfig
interface, it's planned to switch to them very soon. I'll prepare a reference
implemention for msynctool within the next days. The advantages:
- you don't have to parse XML on your own
- plugin config is specified and will be (hopefully!) used by all plugins soon
- maybe it's even possible to write generic UI widgets, so you don't have to
create a new one for each new plugin


Some oustanding implemention details to discuss, about configuration files and
other files within the members directory. Right now we have:

syncmember.conf
$plugin.conf

Since even $plugin.conf is specified and with OSyncPluginRessource there is
some redundant information in both configs. Are there any objections to have
another file to avoid this redundant information? So far i have "ressource"
information in mind. Which basically is about the per ressource information:
- Ressource identifier (e.g. database name, path, url, ...)
- ObjFormat(Sink) and Object Type
- Active Ressource (to sync or not to sync?!)

Does anyone see an advantage/disadvantage to move this information completely
into syncmember.conf or $plugin.conf - or an compeltely different file?
(Later would require some more effort to make the "updater" aware of a 4th
kind of special file - syncgroup.conf, syncmember.conf, $plugin.conf, NEW:
ressource.conf ....

best regards,
Daniel

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