Qfyilyi

I've stumbled upon a problem, that can be summarized as follows:

I have an application which is embedded with OSGI. In this OSGI container, I have installed a bundle A of version v1 which registers that service object. This service object is used by the host application. while the service object is in use, I uninstalled the bundle A and installed a new version(v2) of the bundle A. Here are my findings.

• Old service object works fine even if we uninstall the bundle A(v1).


• The new service object gives the new functionality of bundle A(v2).

My question here is when we refresh the bundle packages by using

List<Bundle> refreshbundles = new ArrayList<Bundle>();

Bundle local; // points to the bundle

refreshbundles.add(local);

m_felix.adapt(FrameworkWiring.class).refreshBundles(refreshbundles)

and when we try to get the service object registered by the new version of the bundle A, it is returning null. I tried looking at the source code but it didn't help. can you please help me with this?

EDIT:

HostApplication

public Felix m_felix = null;

m_felix = new Felix(config); //sending some config to felix.

m_felix.start();



//installing bundle

Bundle bundle = m_felix.getBundleContext().installBundle("file:/bundleA-1.0.jar")    

bundle.start()



//getting the service object registered by bundle A.

ServiceReference sr = m_felix.getBundleContext()

                        .getServiceReference(SampleInterface.class.getName()))

(SampleInterface) m_felix.getBundleContext(sr).getService().sayHI();



//now uninstalling the bundle installing the new version of it say version 1.1

bundle.uninstall()

bundle = m_felix.getBundleContext().installBundle("file:/bundleA-1.1.jar")    

bundle.start()



//getting the service object registered by bundleA1.1



ServiceReference sr = m_felix.getBundleContext()

                    .getServiceReference(SampleInterface.class.getName()))

(SampleInterface) m_felix.getBundleContext(sr).getService().sayHI();



//the above line is working fine but after refreshing the packages, Service object is returned as null    



List<Bundle> refreshbundles = new ArrayList<Bundle>();

Bundle bundle; // points to the bundle

refreshbundles.add(bundle);

m_felix.adapt(FrameworkWiring.class).refreshBundles(refreshbundles)



//refresh done

ServiceReference sr = m_felix.getBundleContext()

                    .getServiceReference(SampleInterface.class.getName()))

(SampleInterface) m_felix.getBundleContext(sr).getService().sayHI();



//throwing null pointer exception because getService() is returning null.

what exactly is happening when we refresh the bundles?

BundleA_Activator.java

public class BundleA_Activator extends BundleActivator{

   public class BundleActivatorInterfaces implements  BundleActivator{

    ServiceRegistration SR;

    @Override

    public void start(BundleContext bundleContext) {



        SR = bundleContext.registerService(SampleInterface.class.getName(), new ExposedClass(), null);

    }



    @Override

    public void stop(BundleContext bundleContext) {

            SR.unregister();

    }

}