ejb3/src/main/java/org/jboss/as/ejb3/deployment/processors/MessageDrivenComponentDescriptionFactory.java
private String getDefaultResourceAdapterName(final ServiceRegistry serviceRegistry) {
        if (appclient) {
            // we must report the MDB, but we can't use any MDB/JCA facilities
            return "n/a";
        }
        final ServiceController<DefaultResourceAdapterService> serviceController = (ServiceController<DefaultResourceAdapterService>) serviceRegistry.getRequiredService(DefaultResourceAdapterService.DEFAULT_RA_NAME_SERVICE_NAME);
        return serviceController.getValue().getDefaultResourceAdapterName();
    }
private String getDefaultResourceAdapterName(final ServiceRegistry serviceRegistry) {
        if (appclient) {
            // we must report the MDB, but we can't use any MDB/JCA facilities
            return "n/a";
        }
        final ServiceController<DefaultResourceAdapterService> serviceController = (ServiceController<DefaultResourceAdapterService>) serviceRegistry.getRequiredService(DefaultResourceAdapterService.DEFAULT_RA_NAME_SERVICE_NAME);
        return serviceController.getValue().getDefaultResourceAdapterName();
    }
private String getDefaultResourceAdapterName ( final ServiceRegistry serviceRegistry ) { if ( appclient ) { // we must report the MDB, but we can't use any MDB/JCA facilities return "n/a" ; } final ServiceController < DefaultResourceAdapterService > serviceController = ( ServiceController < DefaultResourceAdapterService > ) serviceRegistry . getRequiredService ( DefaultResourceAdapterService . DEFAULT_RA_NAME_SERVICE_NAME ) ; return serviceController . getValue ( ) . getDefaultResourceAdapterName ( ) ; }
Returns the name of the resource adapter which will be used as the default RA for MDBs (unless overridden by
the MDBs).

@param serviceRegistry
@return
Returns the name of the resource adapter which will be used as the default RA for MDBs ( unless overridden by the MDBs ) .