Neil, Could the declarative services of OSGi fit well with the module system for project Jigsaw and the enhanced ServiceLoader API ? http://openjdk.java.net/projects/jigsaw/doc/draft-java-module-system-requirements-12#services
Obviously, I'm well aware that Jigsaw is taking a long time to implement over at Oracle and that there are (were) some "political" debates... Was just wondering from a practical point of view if there was any information about these features. -- Christopher On 2 June 2013 13:45, Neil Bartlett <[email protected]> wrote: > Christopher, > > Not really; a DS component can do literally everything that a bundle > activator can do. Additionally you can have more than one of them per > bundle, and you have much easier access to services and configuration. > > Regards > Neil > > On Sun, Jun 2, 2013 at 8:54 AM, Christopher BROWN <[email protected]> > wrote: > > > Hi Peter, > > > > Isn't that a bit like asserting that you only ever need functional > > programming, and not OOP or any other imperative style? > > > > I would tend to agree with your assertion, where DS is the best fit > > solution for most use cases, but having the bundle activator is nice in > > order to handle edge cases. > > > > -- > > Christopher > > > > > > > > On 1 June 2013 11:27, Peter Kriens <[email protected]> wrote: > > > > > If I had to start over with the design of OSGi there would be no bundle > > > activator, just DS components ... The activator was a mistake since it > > is a > > > singleton and I now sometimes wonder what we are smoking, forcing > people > > to > > > handle their own service dependencies. DS's support services, service > > > factories, and more as well as fully handling service dependencies > makes > > > services as lightweight as classes. With the DS annotations you can > turn > > ay > > > class into a service (factory) whenever you want, not requiring any > extra > > > setup. I found it amazing how light weight services became once I could > > do > > > this. > > > > > > You can control the life cycle of the component with config admin using > > > managed service (factories). Config admin can define/override service > > > properties and define which service dependencies are bound by setting > the > > > target filter. > > > > > > With DS you do not need the dependency manager since DS handles deps > for > > > you. > > > > > > Again, OSGi was not complete until DS was specified. > > > > > > Kind regards, > > > > > > Peters Kriens > > >
