def on_service_arrival(self, svc_ref):
        """
        Called when a service has been registered in the framework

        :param svc_ref: A service reference
        """
        with self._lock:
            if svc_ref not in self.services:
                # Get the key property
                prop_value = svc_ref.get_property(self._key)
                if (
                    prop_value not in self._future_value
                    and prop_value is not None
                    or self._allow_none
                ):
                    # Matching new property value
                    service = self._context.get_service(svc_ref)

                    # Store the information
                    self._future_value[prop_value] = service
                    self.services[svc_ref] = service

                    # Call back iPOPO
                    self._ipopo_instance.bind(self, service, svc_ref)
                    return True

            return None
def on_service_arrival ( self , svc_ref ) : with self . _lock : if svc_ref not in self . services : prop_value = svc_ref . get_property ( self . _key ) if ( prop_value not in self . _future_value and prop_value is not None or self . _allow_none ) : service = self . _context . get_service ( svc_ref ) self . _future_value [ prop_value ] = service self . services [ svc_ref ] = service self . _ipopo_instance . bind ( self , service , svc_ref ) return True return None
Called when a service has been registered in the framework

        :param svc_ref: A service reference