Oh I love this idea. I am having the same issues with my application as it has 
assets that are GWT components and I'd like to version those separately too. 
Enthusiastic +1.  



On Jul 13, 2012, at 1:16 PM, Kalle Korhonen <[email protected]> wrote:

> We are deploying our app to production once a week and I find it quite
> annoying that every time we basically force our users to re-download
> all of the application resources even though only a small subset of
> them changed, causing wasted bandwidth and perceived performance
> issues. At the same time, we cannot afford users to have stale
> resources in their caches. All of the Tynamo.org modules add their own
> version to asset paths so adding the application version is completely
> redundant, for example:
> http://localhost:8080/assets/0.0.1-SNAPSHOT-1341940822046/facebook-0.1.0/components/fb-button.css
> 
> We briefly looked into generically changing how asset paths are
> constructed to include module's own version but it's difficult to
> achieve because the context (from which module the asset came) is
> lost.
> 
> Tynamo modules contribute something like:
>    public static void
> contributeClasspathAssetAliasManager(MappedConfiguration<String,
> String> configuration)
>    {
>        configuration.add(PATH_PREFIX + "-" + version, "org/tynamo/security");
>    }
> 
> What if we implemented a ClassPathAssetAliasManager2 that would take a
> MappedConfiguration<String, Package> so we could automatically do the
> same as above for add-on modules, using
> Package.getImplementationVersion()?
> 
> It would encourage the (best) practice of placing the main module
> class to the intended root package of a module, and it'd be very
> simple to contribute in the module like so:
>    public static void
> contributeClasspathAssetAliasManager2(MappedConfiguration<String,
> Package> configuration)
>    {
>        configuration.add(PATH_PREFIX, getClass().getPackage() );
>    }
> 
> Similarly, LibraryMapping (a contribution to ComponentClassResolver)
> could also accept a Package, rather than just a string.
> 
> What do you think?
> 
> Kalle
> 
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