Hi Tian
I was involved in an effort a few years ago to enforce the Harmony
module boundaries using Equinox, which sounds similar to the idea
below. The problem with that approach was that we weren't able to
restrict Equinox's use of Java to particular Harmony modules and so it
was very difficult to bootstrap the system. Also, because of the way
Java allows class loading to be deferred in some situations, it was
impossible to know when bootstrapping was complete, so the option of
bootstrapping in a "permissive" mode and then tightening up the rules
later wasn't viable. In the end we concluded that the Harmony module
boundaries would best be enforced by native code in the VM and we
built a prototype which did just that. Unfortunately, the prototype
was never released.
I think you'll find as you get into this work that the main symptom is
various kinds of recursive death, such as stack overflow. So if that
approach doesn't work out, which I suspect it may not, you might
consider taking one of the open source VMs associated with Harmony and
building sufficient OSGi support into it for the Harmony modules.
Sorry if this comes across a little negative. I think the objective
would be very valuable to achieve and so I wish you well. For example,
it would show that OSGi metadata is sufficient to implement Project
Jigsaw.
Glyn
On 8 Jun 2009, at 06:57, galaxy wrote:
Hi ,all
I participate this year's google summer code in apache
harmony :implementing
osgi-ed jre and I want to use felix in my work to organize the
modules of
harmony
So I think it's necessary to make you notified here :) and I want to
ask
your permission on this .
Regarding to the project , I think I have to make some modification
in the
source code in felix ,at least I have to export java.* .
Any rules I have to follow or anything else ,please let me know .
Thanks !
I think I will visit here a lot in this coming summer :)
--
regards
Tian
