def correlate_merge_downlinks(ca: ActiveAlarm) -> bool:
"""
Donwlink merge correlation
:param ca:
:return:
"""
if not ca.uplinks or not ca.rca_neighbors:
return False
dlm_neighbors = {
mo: w
for mo, w in zip(ca.rca_neighbors, ca.dlm_windows) if w > 0
}
dlm_candidates = set(neighbor_alarms) & set(dlm_neighbors)
if not dlm_candidates:
return False
# Get possible candidates
t0 = ca.timestamp
candidates = list(
sorted(
(neighbor_alarms[mo] for mo in dlm_candidates
if (t0 - neighbor_alarms[mo].timestamp
).total_seconds() <= dlm_neighbors[mo]),
key=operator.attrgetter("timestamp"),
))
if not candidates:
return False
ra = candidates[0]
self.logger.info("[%s] Set root to %s (downlink merge)", ca.id,
ra.id)
ca.set_root(ra, rca_type=RCA_DOWNLINK_MERGE)
metrics["alarm_correlated_topology"] += 1
return True
def correlate_uplinks(ca: ActiveAlarm) -> bool:
"""
Correlate with uplink alarms if all uplinks are faulty.
:param a1:
:return:
"""
if not all_uplinks_failed(ca):
return False
self.logger.info("[%s] All uplinks are faulty. Correlating", ca.id)
ra = get_root(ca)
if not ra:
return False
self.logger.info("[%s] Set root to %s", ca.id, ra.id)
ca.set_root(ra, rca_type=RCA_TOPOLOGY)
metrics["alarm_correlated_topology"] += 1
return True
