Will the whole Geronimo framework be ported to OSGI?

[luzhongda <lu...@gmail.com>]

Hi All:
I am a newbie to Geronimo.
Although I only digged into the internal implementation of Geronimo for only about a month.
I was absorbed by the flexibility of Geronimo framework and its GBean implementation.
Geronimo is a very great integration framework.
Currently most other application server have been ported to OSGI framework in order to be standard compatible 
and utilize the strength of OSGI.
Is there any schedule or plan for Geronimo to be ported to OSGI?
Can the GBean framework be kept unchanged once Geronimo was changed to OSGI based?
     Any information about OSGI for Geronimo is welcomed.
     Thanks.
     Best Regards.




luzhongda 

Re: Will the whole Geronimo framework be ported to OSGI?

[Lu Zhongda <lu...@gmail.com>]

Hi, David:
    Thanks for your help.
    It is really really helpful!
Best Regards.
Lu Zhongda.
 

----- Original Message ----- 
From: David  <ma...@yahoo.com> Jencks 
To: dev@geronimo.apache.org 
Sent: Monday, June 29, 2009 1:01 AM
Subject: Re: Will the whole Geronimo framework be ported to OSGI?


On Jun 28, 2009, at 8:40 AM, luzhongda wrote:



Hi All:
I am a newbie to Geronimo.
Although I only digged into the internal implementation of Geronimo for only
about a month.
I was absorbed by the flexibility of Geronimo framework and its GBean
implementation.
Geronimo is a very great integration framework.
Currently most other application server have been ported to OSGI framework
in order to be standard compatible
and utilize the strength of OSGI.
Is there any schedule or plan for Geronimo to be ported to OSGI?


We're working on it.... 



Can the GBean framework be kept unchanged once Geronimo was changed to OSGI
based?


My current plan is to 
- use osgi classloaders (bundles)
- put the geronimo kernel in the osgi service registry
- geronimo plugins will become bundles
- there will be a bundle activator that starts up a Configuration (plugin).

I think this will let gbeans more or less work in an osgi environment.

We also have a osgi blueprint service implementation that is pretty far
along and we may decide that converting all or most of our plugins to be
blueprint based bundles is a good idea.

There are also some problems I don't know how to solve in osgi, mostly how
to decide, given several bundles that supply the same packages, which one to
use.  At the moment I'm leaning towards keeping our maven-like dependency
system for this purpose.  Another perspective on this problem is, given a
bundle with some dependencies on packages and services, how do you figure
out what other bundles are needed to assemble a working server.

thanks
david jencks



     Any information about OSGI for Geronimo is welcomed.
     Thanks.
     Best Regards.
 

  _____  

luzhongda
 

Re: Will the whole Geronimo framework be ported to OSGI?

[David Jencks <da...@yahoo.com>]

On Jun 28, 2009, at 8:40 AM, luzhongda wrote:

> Hi All:
> I am a newbie to Geronimo.
> Although I only digged into the internal implementation of Geronimo  
> for only about a month.
> I was absorbed by the flexibility of Geronimo framework and its  
> GBean implementation.
> Geronimo is a very great integration framework.
> Currently most other application server have been ported to OSGI  
> framework in order to be standard compatible
> and utilize the strength of OSGI.
> Is there any schedule or plan for Geronimo to be ported to OSGI?

We're working on it....
> Can the GBean framework be kept unchanged once Geronimo was changed  
> to OSGI based?

My current plan is to
- use osgi classloaders (bundles)
- put the geronimo kernel in the osgi service registry
- geronimo plugins will become bundles
- there will be a bundle activator that starts up a Configuration  
(plugin).

I think this will let gbeans more or less work in an osgi environment.

We also have a osgi blueprint service implementation that is pretty  
far along and we may decide that converting all or most of our plugins  
to be blueprint based bundles is a good idea.

There are also some problems I don't know how to solve in osgi, mostly  
how to decide, given several bundles that supply the same packages,  
which one to use.  At the moment I'm leaning towards keeping our maven- 
like dependency system for this purpose.  Another perspective on this  
problem is, given a bundle with some dependencies on packages and  
services, how do you figure out what other bundles are needed to  
assemble a working server.

thanks
david jencks

>      Any information about OSGI for Geronimo is welcomed.
>      Thanks.
>      Best Regards.
>
> luzhongda
>