class EventMatcher:
"""Consumes TRUST & GPS reports. This is where the reports first come from
the stream.
Reports that arrive are matched with reports that occurred at the same
tiploc within a given interval (env.within_minutes). The matchings are added
to the queue to be processed later by the ServiceMatcher.
"""
def __init__(self, queue, tracker):
self.queue = queue
self.tracker = tracker
self.gps_cache = TiplocCache(env.retention_minutes)
self.trust_cache = TiplocCache(env.retention_minutes)
def match_trust(self, trust):
tiploc = trust['tiploc']
time = trust['event_time']
service = get_service_key(trust)
self.tracker.seen_service(service)
self.trust_cache.add(tiploc, time, trust)
close_gps_reports = self.gps_cache.get_within(
tiploc, time, env.within_minutes)
for gps in close_gps_reports:
self.queue.add(trust, gps)
def match_gps(self, gps):
tiploc = gps['tiploc']
time = gps['event_time']
unit = gps['gps_car_id']
self.tracker.seen_unit(unit)
self.gps_cache.add(tiploc, time, gps)
close_trust_reports = self.trust_cache.get_within(
tiploc, time, env.within_minutes)
for trust in close_trust_reports:
self.queue.add(trust, gps)
def __init__(self, queue, tracker):
self.queue = queue
self.tracker = tracker
self.gps_cache = TiplocCache(env.retention_minutes)
self.trust_cache = TiplocCache(env.retention_minutes)
