Hi all,
just sharing thoughts and starting (or at least trying to start) a
discussion.
As DSpace grows, the number of modules grows. However, DSpace already has
lot's of modules (there are also some planned contributions that will
increase this number) and, in the general case, some of them aren't used at
all. Also the current add-on deployment procedure is complex, most of the
add-ons requires a DSpace rebuild and re-deployment (restarting the webapp
container), this complexity grows if one tries to apply multiple add-ons.
So, my point is:
- What about following an OSGi Model in DSpace, based in some OSGi
framework?
An increasing number of Java application servers are being based on OSGi.
The OSGi framework provides a runtime environment for the application
server's modules. As the application server initialises, its modules are
started and can communicate between themselves either using services or by
importing classes from each other.
Applications running inside container modules provided by the application
server need not be aware of the OSGi framework. This provides a low-cost
migration path for existing applications. It will provide users an easy way
deploying add-ons (without the need of rebuild/restart the webapp
container) and also allow to select only the required services.
As we (Lyncode) are currently developing a completely new and dynamic UI
for DSpace based on this model, our current intents are to embed this
module (SpringUI) in the DSpace (static) structure making use of some
tweaks over the application server, however, i think that makes more sense
to embed DSpace in an OSGi framework.
What do you think?
--
Thanks, João Melo (My Portfolio <http://www.lyncode.com/m/jmelo/>)
DSpace Department
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