We've just migrated our "main" application from Oscar to Felix.
It did take us some time, and there were a few areas of "detail" we had
to be careful of, but we're up and running now and Felix is doing a very
very good job for us.
We used mangen to deal with Manifest differences automatically - a
simple config switch tells it to process our bundle set and generate v2
manifests rather than v1 (our manifest generation is fully automated in
our build process).
That aside, a few minor tweaks and a custom MutablePropertyResolver to
make our property files work same in Felix as they did under Oscar, and
we're up and running.
Just out experiences
-- Rob
BOTTARO Andre RD-MAPS-GRE wrote:
Hi,
It happens that more than a year after the 4th public release of OSGi(tm) specification and that felix project has begun, there is still an important gap to overcome for oscar developers to adopt felix platform :
- The numerous R3 bundles developed before are not deployable as is on the felix platform whereas the Core specification announce that OSGi(tm) platfroms must be backward compatible (Manifest version 1 and 2)
- The felix platform is delivered with a bundle repository client which is not
compatible with previous repositories. It is due to obr 2 technical disrupt and
felix decision (?) not to remain backward compatible.
It explains that the choice between R3 and R4 before any development phase is
not easy and I admit that I sometimes recommend to stay on the good old
oscar... (especially for quick developments, quick application tests, or
developments with existing R3 bundles).
Some (naive ?) solutions may answer the 2 problems I mention. Tell me if it is
reasonable:
- felix Module Class Loader may enable bundles with manifest version 1 to
import all the packages of the boot-delegation classpath. Or even better, a R3
module class loader can be attached to those bundles.
- oscar bundle repository client may be embedded in the felix one in order for
the latter to be backward compatible. (on this simpler topic, I could recommend
using felix with kf bundle repository client and server...)
I did not check if other platforms treat R3 bundles better. Was the core specification too ambitious ?
--
André
--
Ascert - Taking systems to the Edge
[EMAIL PROTECTED]
+44 (0)20 7488 3470
www.ascert.com
