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From "Kevin Sutter (JIRA)" <>
Subject [jira] Commented: (OPENJPA-980) EhCache implementation of OpenJPA caching
Date Mon, 16 Mar 2009 18:05:50 GMT


Kevin Sutter commented on OPENJPA-980:

I have to question whether OpenJPA is the right repository for these type of plugin implementations.
 OpenJPA defines and implements the plugin interface, but do we want to be in the "business"
of developing and supporting the various plugin implementations?  Take this EhCache implementation
as an example.  I'm sure this implementation provides the level of function required by the
submitter.  But, how do we know it's a general solution that can be used outside of the submitter's
environment and needs?  And, do we plan to sign up for support for this implementation?  What
version(s) of EhCache does this plugin work with?  And, who's going to support the next version
(or past versions) of EhCache?

IMHO, the implementation of a plugin should be provided with the product that is being plugged
in.  In this particular example, should this EhCache implementation be owned by the EhCache
team?  Now I know this particular case probably won't fly, since Gavin probably doesn't want
to promote the use of OpenJPA...  :-)  But, you get the picture.

Maybe we should consider a sub-project to house plugin implementations that wish to be supported?
 Something like OpenJPA-Plugins, or OpenJPA-Caches, or OpenJPA-EhCache (depending on the desired
granularity).  We just need to be aware of what we're signing up for when we accept contributions
like this.  Thanks.


> EhCache implementation of OpenJPA caching
> -----------------------------------------
>                 Key: OPENJPA-980
>                 URL:
>             Project: OpenJPA
>          Issue Type: New Feature
>          Components: datacache
>    Affects Versions: 1.2.0
>            Reporter: Craig
> I created QueryCache and DataCache implementations for EhCache. I think it would be great
to see this included in a future version of OpenJPA, as presently, OpenJPA includes only its
own implementation.
> The code is licensed under the APL 2.0 and includes unit tests.
> My implementation is based on the work of Pinaki Poddar, who created a DataCache implementation
for Coherence - I think that would also be nice to include.
> Thanks!

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