You can do this with DS, have a look at section 112.6.2.2 Minimum Cardinality Property
Regards Carsten Thomas Driessen wrote > Hi, > > I currently have the following usecase: > > Service A depends on Service B > Service B depends on 4x Service C > Service A may only become active when Service B has exactly 4x Service > C, thus becoming active itself. > > I'm using declarative services which only support 0-*, 1-*, 0-1 and > exactly 1 dependencies between services. > > One idea I came up with, was to count the C services in B's setC(C c) > method and, on reaching the count of 4, setting a specific property on B > (e.g. weirdUsecaseIsActive = true) and let A's reference to B filter > with a corresponding target filter. > > I know this sound like a dirty hack, but I did not found any better > solutions. > > Therefore, my questions are: > 1) Is there a better solution for my usecase? > 2) If not: How do I update properties of a service at runtime? > > Kind regards, > Thomas > > > _______________________________________________ > OSGi Developer Mail List > osgi-dev@mail.osgi.org > https://mail.osgi.org/mailman/listinfo/osgi-dev > -- Carsten Ziegeler Adobe Research Switzerland cziege...@apache.org _______________________________________________ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev
