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.
HTH. Emily On Wed, Jan 16, 2013 at 3:32 PM, Felix Meschberger <[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 > > mailto:[email protected] > > http://www.zdila.sk/ > > > > _______________________________________________ > > OSGi Developer Mail List > > [email protected] > > https://mail.osgi.org/mailman/listinfo/osgi-dev > > > _______________________________________________ > OSGi Developer Mail List > [email protected] > https://mail.osgi.org/mailman/listinfo/osgi-dev > -- Thanks Emily ================= Emily Jiang [email protected]
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