[jsr294-modularity-eg] Runtime model

[Glyn Normington]

I agree with Bryan. To re-iterate: OSGi bundles will want to exploit 
superpackages on Java 7 *and* run unmodified in pre-Java 7 environments.

Glyn

Bryan Atsatt <bryan.atsatt at oracle.com> wrote on 17/07/2007 01:30:55 AM:

> OSGi bundles.
> 
> The static (dev-time) approach to mapping legacy classes into 
> superpackages should be sufficient for 277 modules, since these modules 
> will only run on Java 7.
> 
> However, OSGi bundles do not have this restriction. So a developer would 

> have to create a special version of the bundle to run on Java 7; hence 
> the build/support/distribution complexity.
> 
> If the superpackage mapping could be done dynamically, then the OSGi 
> runtime can take the burden from the developer, layering a superpackage 
> over the legacy classes only when on Java 7.
> 
> And, given such a facility, 277 may choose to use it rather than require 

> new tooling.
> 
> // Bryan
> 
> Andreas Sterbenz wrote:
> > Bryan Atsatt wrote:
> >> Glyn and I both agreed that the use case is limiting external access 
to 
> >> legacy classes in a module. Supporting this at runtime allows the 
> >> unmodified legacy classes to continue to run in pre-Java 7 
environments, 
> >> thus simplifying build/support/distribution.
> > 
> > By "legacy classes in a module", do you mean JSR 277 module? Since JSR 
277 
> > is currently also targeted for JDK 7, a JSR 277 module will not run on 
JDK 
> > 6 regardless of superpackages (unless potentially as a plain JAR file, 

> > which would largely defeat the purpose of making it a module).
> > 
> > Or which other deployment mechanism are you thinking of?
> > 
> > Andreas.
> > _______________________________________________
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> > jsr294-modularity-eg at cs.oswego.edu
> > http://cs.oswego.edu/mailman/listinfo/jsr294-modularity-eg
> > 
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