[jboss-as7-dev] (XA)Datasources subresources and use cases

[Heiko Braun]

+1

On Oct 20, 2011, at 1:47 PM, Stefano Maestri wrote:

> Hi all,
> 
> I've recently worked on adding subresources for configuration properties 
> to resource-adapters and now I'm working on datasources and xa-datasources.
> While a pure subresources approach is working out of the box for RAs, 
> since add operations work only on DMR and services and runtime metadata 
> information are created during rar deployment, it's not the same for 
> (xa)DS. Here add operation effectively deploy the datasources, so adding 
> properties as subresources comes after effective deployment.
> IOW the subresources can't be used during runtime creation of a 
> datasource, but only during parsing. Having connection-properties and 
> xa-datasource-properties as subresources should make easier and more 
> standard to add/remove them.
> 
> Since currently we are supporting datasource creation from console and 
> cli and since I think it's a wanted feature I have a proposal to make it 
> possible also with subresources.
> 
> Basically the idea is to use the current enable/disable status to make 
> possible to edit a datasource. Datasource are always created disabled 
> (boolean parameter enable will be removed from add operation), and 
> permit to add/remove subresource in this status. Then console/cli have 
> to enable the datasource making it available and registered in jndi. 
> It's not possible to edit a datasource enabled, it must be disabled 
> first. Of course this approach could be extended not only to 
> subresources, but also to all editable field that currently require a 
> server reload.
> 
> comments or problem you can see in this approach?
> 
> regards
> S.
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