Extending CQ native commerce provider API

Hi there ,

 I have started exploring cq commerce and as part of it was trying to extend the CQ native API .  Referring the article from here    http://helpx.adobe.com/adobe-cq/using/creating-custom-cq-commerce-providers.html ,   i have deployed my extended CQ commerce classes in felix console as a OSGI bundle . My custom CQ commerce provider is 'training' .

  However in geometrixx / en pages when I change 'cq:commerceprovider' property to 'training' and start using the pages it throws Null pointer exceptions in the back end with no products getting displayed on the category pages .

 My debugger pointed out to getServiceContext   method   from   OOTB class 'AbstractJcrCommerceServiceFactory'  . It seems that   AbstractJcrCommerceServiceFactory has service dependencies via @ reference  to set of services like languagemanager , slingRepository etc which should normally gets injected  . The getServiceContext method basically gives handles to these set of injected references . 

These services are injecting as expected when I'm using the OOTB reference commerce provider implementation('geometrixx')  which by default ships in with CQ installation . However when I change the provider to 'training' these services are not getting  injected  and getserviceContext returns null,which eventually is throwing null pointer exception .  

I see the same behaviour when I deploy my bundle from 'crxde' or 'eclipse ' .  I was on java 1.7 and also tested it in java 1.6  . From felix console I can see the bundle properly registered . Any pointers why these services not getting injected ? 

@Component(componentAbstract = true, metatype = false) public abstract class AbstractJcrCommerceServiceFactory implements CommerceServiceFactory { @Reference protected LanguageManager languageManager; @Reference protected UserPropertiesService userPropertiesService; @Reference protected SlingSettingsService slingSettingsService; @Reference protected SlingRepository slingRepository; @Reference protected CommerceSearchProviderManager searchProviderManager;