def get_metrics_data_topic(self, name, topic_name, metric, rollup, filter_expresssion):
response = self._perform_get(<EOL>self._get_get_metrics_data_topic_path(name, topic_name, metric, rollup, filter_expresssion),<EOL>None)<EOL>return _MinidomXmlToObject.convert_response_to_feeds(<EOL>response,<EOL>partial(<EOL>_ServiceBusManagementXmlSerializer.xml_to_metrics,<EOL>object_type=MetricValues<EOL>)<EOL>)<EOL>
Retrieves the list of supported metrics for this namespace and topic

name:
    Name of the service bus namespace.
topic_name:
    Name of the service bus queue in this namespace.
metric:
    name of a supported metric
rollup:
    name of a supported rollup
filter_expression:
    filter, for instance "$filter=Timestamp gt datetime'2014-10-01T00:00:00Z'"