Hello Jason,
On Apr 5, 2009, at 1:09 , Jason van Zyl wrote:
Equinox p2 was designed to replace the aging Update Manager in
Eclipse. It focusses on installing Eclipse-based applications from
scratch and updating them and can be extended to manage other types
of artifacts. If you look at the "agent" part, it is geared towards
desktop environments
Not true.
Jeff McAffer's demo at EclipseCon is a case in point. He provisioned
an EC2 node using p2. [...] Jeff is very much focused on server side
provisioning as am I.
Let me rephrase that, it's geared more towards desktop and server
environments, as compared to smaller (embedded, mobile) environments.
That was the point I was trying to make here.
Note though, I'm no Equinox p2 expert. :)
Then why are you proposing this when you don't even know what p2 is
capable of?
We started working on this system when p2 did not even exist. I even
remember talking to Jeff in those days about our system, but they
decided to make their own, so you could equally well make this
argument the other way round.
It's just my opinion but anyone doing provisioning with OSGi has had
their asses handed to them on a plate by the p2 guys.
In my opinion, p2 is fine if you are already doing everything "the
Eclipse way" and are targetting desktops and servers. There are
however other types of systems that need provisioning, and Apache Ace
tries to cater for those too.
Oleg and I were trying to make something and after looking around at
everything -- and we did look at OBR -- we decided that p2 was good
enough and we would help improve that.
OBR is a repository for components, augmented with metadata that
describes dependencies. As such it's not a provisioning system, so in
my opinion you should not compare it to p2.
There's nothing wrong with competition but I think anyone doing OSGi
provisioning is just going to look around in a year and find p2 has
95% of the market. It's a complicated problem and I think p2 is a
solid base and be improved and adapted to support things like OBR or
anything else including non-OSGi systems.
Nobody can look into the future, and since both p2 and Ace are indeed
software provisioning solutions, there will definitely be overlap in
features. There are also differences though. In the end, the users
will decide what they like best.
Greetings, Marcel
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