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From "Mike Matrigali (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-2469) Java Web Start JNLP PersistenceService API storage support
Date Tue, 12 Jun 2007 21:00:36 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2469?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Mike Matrigali updated DERBY-2469:

I am concerned about making this part of the release that is coming up.  I haven't been able
to apply the patch, but as far as I can tell there is no test to verify it works at all. 
Also not clear what needs to be done to use it.

I do wish Derby had a better mechanism for delivering experimental code to users who would
rather not apply patches and build for themselves.  Until this module is tested it seems like
it should not be part of a delivered derby jar.  

Derby has been built to allow for just these kinds of extensions, it would be nice if we could
somehow improve the release mechanism to allow for this, but whether myrna wants to do that
is up to her.  I would like it if these extensions could be added to a separate jar, maybe
derby_experimental.jar to make it very clear that it is not currently supported.   I havent
seen much write up for this feature so I don't know if it might affect backward compatibility,
or somehow affect files in existing databases if called on them.  We may want to log warnings
to errror logs about experimental, may want to mark dbs as beta, ....

I think it would also be nice if there was an area of the trunk where things like
this could get checked in so that multiple people could work on stuff like this but
where it was easy for a release manager could pick and choose whether it
should be included in an actual release.   In this case it might also serve to 
make sure that the interfaces are right for this module such that one need 
not bundle the new module with the default implementation.  

> Java Web Start JNLP PersistenceService API storage support
> ----------------------------------------------------------
>                 Key: DERBY-2469
>                 URL: https://issues.apache.org/jira/browse/DERBY-2469
>             Project: Derby
>          Issue Type: New Feature
>          Components: Store
>    Affects Versions:
>         Environment: Java Web Start
>            Reporter: Luigi Lauro
>            Assignee: David Van Couvering
>            Priority: Minor
>         Attachments: svn-diff-20070329, svn-diff-20070606, svn-diff-20070612
> I would love to have Derby write/read to the storage area provided by the JNLP PersistenceService
> Since Derby is now bundled with the Java6 JDK as JavaDB, I think this  integration would
go a long way towards making derby more developer- friendly in Java Web Start environments,
where using the sandbox tools Sun provides us it the right way to go, instead of working 
around it and force the user to give the app the authorization to write on the hard drive
> I'm investigating the effort needed to provide an implementation of the WritableStorageFactory
interface around the PersistenceService API, and if that's doable in a few days work, I will
start working on it and submit a patch for testing/approval ASAP.
> Feel free to volounteer and provide pointers/hints/whatever, it's really appreciate,
especially since I currently know nothing of derby internals.

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