+ # FullStatus may be more up to date than our model, and the
+ # unit may have gone away, or we may be doing something silly,
+ # like trying to fetch leadership for a subordinate, which
+ # will not be filed where we expect in the model. In those
+ # cases, we may simply return False, as a nonexistent or
+ # subordinate unit is not a leader.
+ if not status.applications.get(app):
+ return False
+
+ if not status.applications[app].get('units'):
+ return False
+
+ if not status.applications[app]['units'].get(self.name):
+ return False
+
+ return status.applications[app]['units'][self.name].get('leader',
+ False)
+
+ async def get_metrics(self):
+ """Get metrics for the unit.
+
+ :return: Dictionary of metrics for this unit.
+
+ """
+ metrics = await self.model.get_metrics(self.tag)
+ return metrics[self.name]