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From David Jencks <>
Subject Re: About deploying web applications to Tomcat 7.0
Date Mon, 04 Jan 2010 06:02:58 GMT

On Jan 3, 2010, at 5:53 PM, Ivan wrote:
>> I will try the solution about dividing the ear as multiple bundles,  
>> the ear itself is one, all the modules it contains are the others,  
>> and it is possible to use require-bundle to connect the module  
>> bundle to the ear bundle.
> I'd prefer to avoid require-bundle.  I was thinking of modifying the  
> pax url handler so that we could continue to repackage the ear as we  
> do now, but have the car file contain several bundles corresponding  
> to the different modules inside.  We could perhaps imitate jar urls  
> and append !<moduleName> to point to an "internal" bundle.  If we  
> did this the car would still be a single artifact in maven but would  
> supply all the bundles at once.
>     Yes, require-bundle did not have a good reputation in the OSGI  
> world, but in this scenario, I think we could use it to reduce the  
> complexity.
>     Keeping the same package way is a good choice, for currently,  
> the repository directory is a really 'repository', Geronimo never  
> loads any class from it, ^_^.  But if in that way, the file is not a  
> standard bundle, and it only works for the special url handler.

Well, after the bundle gets extracted by the url handler it's a plain  
ordinary bundle.  The car-with bundles-inside is really just a  
delivery mechanism.  I'm pretty sure it would be easy to implement,  
but might not be a great idea long term.  It might be convenient until  
we find something better.  On the other hand it might get popular in  
other contexts.

I forgot to mention that the other approach that seems promising to me  
is to use the application bundle idea from the aries project.

david jencks
>> One thing I am thinking is that how to generate the exports for the  
>> ear bundle, maybe the deployer might need use something like asm to  
>> scan all the library files.
> I think we should look into using BND for this.
>     Yes, BND should help us.
> thanks
> david jencks

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