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RE: Put API/SPI/implementation into separate bundles?: msg#00010

java.osgi.devel

Subject: RE: Put API/SPI/implementation into separate bundles?

> Leaping on this thread as it's something I've had a lot of experience
> unpicking and wouldn't want others to have same pain.
>
> Another issue that is worth considering (and yet another reason to
> separate into api and impl) is that due to osgi resolution requirements
> if you put your impl in the same bundle as the api this effectively
> requires client code to resolve bundles that your impl uses but they
> may
> have no need of using.
>
> This can rapidly get out of control and in the worst case a client
> needs
> to import a much larger set of bundles to use a client api than would
> otherwise be needed.

Yes, this is definitely a concern. Just to paint the flip side of the
spectrum, if you put the API in a separate bundle then either you have a lot
of small bundles (high overhead ratio in management and runtime foot print)
or you lump together unrelated API and have a similar problem to what you
describe.

I'm not countering but rather suggesting that there is not a single, one
size fits all answer.

Jeff




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