def update_positions(ride_positions):
"""
Handler for fleet backends to call when taxi positions changes. Sends the signals and stores the data in memcache.
@param ride_positions: A list of C{TaxiRidePosition}
"""
logging.info("fleet manager: positions update %s" % [rp.ride_uuid for rp in ride_positions])
fleet_signals.positions_update_signal.send(sender="fleet_manager", positions=ride_positions)
for rp in ride_positions:
key = _get_key(rp.ride_uuid)
logging.info("getting from memcache: %s, %s" % (key, FM_MEMCACHE_NAMESPACE))
cached_rp = memcache.get(key, namespace=FM_MEMCACHE_NAMESPACE)
if cached_rp:
logging.info("memcache[%s] -> %s" % (key, pickle.loads(cached_rp).__dict__))
pickled_rp = pickle.dumps(rp)
if cached_rp != pickled_rp: # this is a new position
logging.info("new position received: %s[%s:%s]" % (rp.ride_uuid, rp.lat, rp.lon))
memcache.set(key, pickled_rp, namespace=FM_MEMCACHE_NAMESPACE)
pickmeapp_ride, shared_ride = rides_from_uuid(rp.ride_uuid)
if pickmeapp_ride or shared_ride:
e = RideEvent(pickmeapp_ride=pickmeapp_ride, shared_ride=shared_ride,
status=FleetManagerRideStatus.POSITION_CHANGED, raw_status=POSITION_CHANGED, lat=rp.lat,
lon=rp.lon, taxi_id=rp.taxi_id, timestamp=rp.timestamp)
e.save()
logging.info("new ride event created: %s" % e)
if shared_ride:
for point in shared_ride.points.all():
distance = distance_between_points(point.lat, point.lon, rp.lat, rp.lon) * 1000
if distance <= DISTANCE_CONSIDERED_AS_VISITED_IN_METERS:
point.update(visited=True)
logging.info("%s %s visited" % (point.get_type_display(), point.id))
else:
logging.info("old position received: %s[%s:%s]" % (rp.ride_uuid, rp.lat, rp.lon))
def test_geo_distance(self):
"""
Test geo distance calculation. Taken from Jan Matuschek's article.
"""
logging.info("\nTesting geo distance liberty to eiffel")
# distance is about 5837 km, check 3 decimal places
d = distance_between_points(40.6892, -74.0444, 48.8583, 2.2945)
expected_d = 5837.413
self.assertAlmostEqual(d, expected_d, places=3, msg="geo distance error %f (expected %f)" % (d, expected_d))
def test_geo_distance(self):
"""
Test geo distance calculation. Taken from Jan Matuschek's article.
"""
logging.info("\nTesting geo distance liberty to eiffel")
# distance is about 5837 km, check 3 decimal places
d = distance_between_points(40.6892, -74.0444, 48.8583, 2.2945)
expected_d = 5837.413
self.assertAlmostEqual(d,
expected_d,
places=3,
msg="geo distance error %f (expected %f)" %
(d, expected_d))
def send_ride_texts(sender, signal_type, positions, **kwargs):
from ordering.models import SharedRide, RideStatus
from fleet.fleet_manager import send_ride_point_text
for position in positions:
ride = SharedRide.by_uuid(position.ride_uuid)
if ride and ride.status == RideStatus.ACCEPTED:
active_points = ride.points.filter(dispatched=False).order_by("stop_time")
if active_points:
current_point = active_points[0]
next_point = active_points[1] if len(active_points) > 1 else None
if distance_between_points(position.lat, position.lon, current_point.lat, current_point.lon) < RIDE_TEXT_THRESHOLD:
send_ride_point_text(ride, current_point, next_point=next_point)
def update_positions(ride_positions):
"""
Handler for fleet backends to call when taxi positions changes. Sends the signals and stores the data in memcache.
@param ride_positions: A list of C{TaxiRidePosition}
"""
logging.info("fleet manager: positions update %s" %
[rp.ride_uuid for rp in ride_positions])
fleet_signals.positions_update_signal.send(sender="fleet_manager",
positions=ride_positions)
for rp in ride_positions:
key = _get_key(rp.ride_uuid)
logging.info("getting from memcache: %s, %s" %
(key, FM_MEMCACHE_NAMESPACE))
cached_rp = memcache.get(key, namespace=FM_MEMCACHE_NAMESPACE)
if cached_rp:
logging.info("memcache[%s] -> %s" %
(key, pickle.loads(cached_rp).__dict__))
pickled_rp = pickle.dumps(rp)
if cached_rp != pickled_rp: # this is a new position
logging.info("new position received: %s[%s:%s]" %
(rp.ride_uuid, rp.lat, rp.lon))
memcache.set(key, pickled_rp, namespace=FM_MEMCACHE_NAMESPACE)
pickmeapp_ride, shared_ride = rides_from_uuid(rp.ride_uuid)
if pickmeapp_ride or shared_ride:
e = RideEvent(pickmeapp_ride=pickmeapp_ride,
shared_ride=shared_ride,
status=FleetManagerRideStatus.POSITION_CHANGED,
raw_status=POSITION_CHANGED,
lat=rp.lat,
lon=rp.lon,
taxi_id=rp.taxi_id,
timestamp=rp.timestamp)
e.save()
logging.info("new ride event created: %s" % e)
if shared_ride:
for point in shared_ride.points.all():
distance = distance_between_points(point.lat, point.lon,
rp.lat, rp.lon) * 1000
if distance <= DISTANCE_CONSIDERED_AS_VISITED_IN_METERS:
point.update(visited=True)
logging.info("%s %s visited" %
(point.get_type_display(), point.id))
else:
logging.info("old position received: %s[%s:%s]" %
(rp.ride_uuid, rp.lat, rp.lon))
