| Re: [equinox-dev] Eclipse ViewPart and OSGI Declarative Servicesproblem |
| We've also run into this problem but didn't want to use any technology/framework other than RCP, DS and OSGi. Our solution so far is rather a workaround, but works fine for us so far: We've created a generic service listener interface and a generic ServiceTracker: public interface IGenericServiceListener<S> { public void bindService(S service); public void unbindService(S service); } public class GenericServiceTracker<S> extends ServiceTracker { private S service; private List<IGenericServiceListener<S>> serviceListener; private final Class<S> clazz; public GenericServiceTracker(BundleContext context, Class<S> clazz) { super(context, clazz.getName(), null); this.clazz = clazz; this.serviceListener = Collections.synchronizedList(new ArrayList<IGenericServiceListener<S>>()); } @Override public Object addingService(ServiceReference reference) { service = clazz.cast(super.addingService(reference)); informListener(); return service; } private void informListener() { for (IGenericServiceListener<S> listener : serviceListener) { listener.bindService(service); } } public void addServiceListener(IGenericServiceListener<S> serviceListener) { // inform immediately if service available if (this.service != null) { serviceListener.bindService(service); } this.serviceListener.add(serviceListener); } } The generic service interface and ServiceTracker are reusable. Next is the code you have always to write when interested in a specific service: The activator in your RCP plug-in has to implement a specific addServiceListener method, e.g. public static void addFacilityServiceListener( IGenericServiceListener<IFacilityService> listener) { this.facilityServiceTracker.addServiceListener(listener); } And you have to start the ServiceTracker within the Activator-start() method: this.facilityServiceTracker = new GenericServiceTracker<IFacilityService>(context, IFacilityService.class); facilityServiceTracker.open(); Last thing to do is your RCP-ViewClass has to register a serviceListener e.g. within the constructor: public MyRCPView() { MyActivator.addFacilityServiceListener(new IGenericServiceListener<IFacilityService>() { @Override public void bindService(IFacilityService service) { // TODO Auto-generated method stub } @Override public void unbindService(IFacilityService service) { // TODO Auto-generated method stub } }); } Or you can implement the listener interface this way and have bindService() and unbindService() methods directly within your ViewClass public class MyRCPView extends ViewPart implements IGenericServiceListener<IFacilityService> Regards, Eugen Am 02.11.2010 um 13:34 schrieb O'Flynn, Dennis:
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