Right, of course the bnd annotation is a hint to bnd and you cannot always expect to find it on APIs.
In the case of the Configuration Admin spec, implementing ManagedService or ManagedServiceFactory does not make you a provider. You would have to implement ConfigurationAdmin in order to be a provider. The rule of thumb is as follows: suppose a method were added to ManagedServiceFactory... how many bundles would be broken as a result? The answer is "lots" and therefore MSF is a consumer type. However if you added a method to ConfigurationAdmin then only a very small number of bundles would be broken; these are the providers of the Configuration Admin API, e.g. org.apache.felix.configadmin and so on. I think it would be great if the role of each interface in the OSGi Compendium could be explicitly documented, either with the bnd annotation or at least some JavaDoc comment. Neil On Wed, Jan 16, 2013 at 4:25 PM, Martin Ždila <[email protected]> wrote: > Neil, thanks for the answer. > > Now how to find out whether ManagedServiceFactory is ProviderType or > ConsumerType? It has no such annotation and I couldn't find out > anything in the interface documentation. > > On Wed, Jan 16, 2013 at 5:14 PM, Neil Bartlett <[email protected]> > wrote: > > Very good question. This is why we distinguish between "provider > > implemented" and "consumer implemented" interfaces. Usually to a > developer > > the role of the interface is clear, as you have intuitively grasped: > > interfaces that are merely callbacks or listeners are generally "consumer > > implemented". In bnd we have two annotations @ProviderType and > @ConsumerType > > that we place on the interface that allows the tooling to detect the > role of > > the interface and generate the correct import range. > > > > So the rule is, your bundle is a provider of the API if it implements > any of > > the "provider implemented" types. Otherwise it is a consumer. > > > > Neil > > > > On Wed, Jan 16, 2013 at 2:58 PM, Martin Ždila <[email protected]> wrote: > >> > >> 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 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 > > > > -- > 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 >
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