On 18/01/13 14:03, Ferry Huberts wrote:
On 18/01/13 13:08, Emily Jiang wrote:
I recall we discussed this issue in Apache Aries mailing list and BJ
wrote a blog
(http://blog.bjhargrave.com/2011/09/needs-of-many-outweigh-needs-of-few.html)
to explain the semantic versioning changes for a comsumer/provider API.
Basically, as a client, you always choose the wide range as mentioned by
Felix. It is down to the API supplier to maintain its semantic version
correctly, which means to increase its major version if it is a consumer
type api and has introduced a new publich method etc.
Adding a method is a minor change.
Removing methods or changing methods signatures is a major change
BTW: bndtools can do this automatically for you by means of the 'release
bundle' functionality
HTH.
Emily
On Wed, Jan 16, 2013 at 3:32 PM, Felix Meschberger <[email protected]
<mailto:[email protected]>> wrote:
Hi,
Am 16.01.2013 um 15:58 schrieb Martin Ždila:
> Hello
>
> How can I distinguish whether some bundle is API consumer or
provider?
>
> I need it to specify correct Import-Package version range.
>
> Is the bundle automatically provider if it implements any
interface
> from imported package, even interfaces like listeners and
others that
> seems to be more consumer-like?
I think this is really the problem. Whether a bundle is a consumer
or provider and what it means to an Import-Package version range is
not always easy to answer.
If the bundle is not implementing any interfaces or extending
abstract classes, it is certainly a consumer and should use the
wider range.
Then there are interface which can be considered "consumer type" and
interfaces to be considered "provider type". In your concrete
example, I understand ManagedService and ManagedService factory to
be "consumer type" interfaces and thus the wider range applies.
I think if an interface is intended to be implemented by the general
public (as opposed to specific service providers), such interfaces
should really only be changed on major package updates.
Such I understand the class annotations provided by the BND library:
ConsumerType and ProviderType.
Regards
Felix
>
> I am asking because we are using Configuration Admin
implementation of
> version 1.5 but we have many bundles that implements
> ManagedServiceFactory from 1.4. ManagedServiceFactory interface
of 1.5
> is compatible with 1.4 and 1.3, but if we use provider version
range
> for our bundles then it forbids us to use them for both 1.4 and
1.5
> implementation even they are interface-compatible.
>
> Thanks in advance
> Best regards
>
> --
> Ing. Martin Ždila
> tel:+421-908-363-848 <tel:%2B421-908-363-848>
> mailto:[email protected] <mailto:[email protected]>
> http://www.zdila.sk/
>
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Thanks
Emily
=================
Emily Jiang
[email protected] <mailto:[email protected]>
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Ferry Huberts
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