Peter, et al, Would the OSGi services specs provide a good foundation for defining a platform? The specs include Remote Services Administration (RSA). OSGi technology solves or mitigates classpath issues. Admittedly, I don't know how or if the RSA spec addresses codebase issues.
The proliferation of OSGi technology is pretty substantial. Intuitively, OSGi technology and River seem complementary. I mentioned OSGi technology and River a year or so go, so I apologize if I'm beating a dead horse. Thank you! Sam On Aug 28, 2011 9:27 AM, "Peter Firmstone" <peter.firmst...@zeus.net.au> wrote: > Over time I've given this serious contemplation. > > Remember some time ago we discussed service api and dependencies? > Dennis has a really well presented page that highlites the dependency > relationship between service compontents: > > http://www.rio-project.org/tutorial/service/service-intro.html > > I think a number of the usability issues relate to our not having > defined the platform and recognising how this relates to deployment. > > Firstly we need to address codebase annotation loss, preferred classes > is a partial solution, however I think we can completely solve this > problem by only allowing the platform (which we need to clarify) and the > service api to inhabit the classpath. > > All nodes would then have an almost identical classpath, although some > nodes may contain different service api. (The proxy can download > additional service api missing on the client, it depends on, since the > client won't need to access these classes directly anyway, they can be > loaded by the proxy ClassLoader). > > Applications and server side service implementations could have their > own classpath, not visible to proxy's, forcing cooperating parties to > interract using only the platform and service api. Should we modifiy and > standardise ServiceLoader for this purpose? > > Then we stop using the preferred classes mechanism by default. > > This will allow us to prevent codebase annotation loss. > > But to do so we need to define the platform, so all nodes are consistent. > > Any ideas? > > Regards, > > Peter.
