python impl. of metric-name-list for InfluxDB returns incomplete results

Change-Id: I269344f59684c74f9a8ad556620f1b786906cbc5
Closes-Bug: 1628798

monasca_api/api/notificationstype_api_v2.py

@@ -34,5 +34,5 @@ class NotificationsTypeV2API(object):
     def on_put(self, req, res):
         res.status = '501 Not Implemented'
 
-    def on_patch(self, req):
+    def on_patch(self, req, res):
         res.status = '501 Not Implemented'

monasca_api/common/repositories/influxdb/metrics_repository.py

@@ -33,7 +33,6 @@ LOG = log.getLogger(__name__)
 
 
 class MetricsRepository(metrics_repository.AbstractMetricsRepository):
-
     def __init__(self):
 
         try:
@@ -59,6 +58,15 @@ class MetricsRepository(metrics_repository.AbstractMetricsRepository):
 
         return query
 
+    def _build_show_measurements_query(self, dimensions, name, tenant_id, region):
+
+        where_clause = self._build_where_clause(dimensions, name, tenant_id,
+                                                region)
+
+        query = 'show measurements ' + where_clause
+
+        return query
+
     def _build_select_measurement_query(self, dimensions, name, tenant_id,
                                         region, start_timestamp, end_timestamp,
                                         offset, limit):
@@ -277,7 +285,6 @@ class MetricsRepository(metrics_repository.AbstractMetricsRepository):
                                               dimensions,
                                               start_timestamp,
                                               end_timestamp):
-
                         metric = {u'id': str(metric_id),
                                   u'name': series[u'name'],
                                   u'dimensions': dimensions}
@@ -287,17 +294,22 @@ class MetricsRepository(metrics_repository.AbstractMetricsRepository):
 
         return json_metric_list
 
-    def _build_serie_name_list(self, series_names):
+    def _build_measurement_name_list(self, measurement_names):
+        """read measurement names from InfluxDB response
+
+        Extract the measurement names (InfluxDB terminology) from the SHOW MEASURMENTS result to yield metric names
+        :param measurement_names: result from SHOW MEASUREMENTS call (json-dict)
+        :return: list of metric-names (Monasca terminology)
+        """
 
         json_metric_list = []
 
-        if not series_names:
+        if not measurement_names:
             return json_metric_list
 
-        if 'series' in series_names.raw:
-            for series in series_names.raw['series']:
-                name = {u'name': series[u'name']}
-                json_metric_list.append(name)
+        for name in measurement_names.raw.get(u'series', [{}])[0].get(u'values', []):
+            entry = {u'name': name[0]}
+            json_metric_list.append(entry)
 
         json_metric_list = sorted(json_metric_list)
         return json_metric_list
@@ -396,10 +408,12 @@ class MetricsRepository(metrics_repository.AbstractMetricsRepository):
 
         try:
 
-            query = self._build_show_series_query(dimensions, None, tenant_id,
-                                                  region)
+            query = self._build_show_measurements_query(dimensions, None, tenant_id,
+                                                        region)
+
             result = self.influxdb_client.query(query)
-            json_name_list = self._build_serie_name_list(result)
+
+            json_name_list = self._build_measurement_name_list(result)
             return json_name_list
 
         except Exception as ex: