def __init__(self):
self.flights_resp_dal = FlightsRespDAL()
self.pool = ThreadPool(30)
self.pool.start()
class VayantConnector(object):
def __init__(self):
self.flights_resp_dal = FlightsRespDAL()
self.pool = ThreadPool(30)
self.pool.start()
def get_flight_price_async(self, trip):
response = AsyncResponse(self.do_after_done)
self.pool.add_task(self.calculate_flight_info, trip, response)
return response
def get_flight_from_cache(self, key):
cached_resp = self.flights_resp_dal.get(key)
while self.flights_resp_dal.has_key(key) and cached_resp is None:
time.sleep(5)
cached_resp = self.flights_resp_dal.get(key)
return cached_resp
def calculate_flight_info(self, trip, response):
resp = self.get_flights_info(trip)
response.set_response_value(resp)
def get_flights_info(self, trip):
resp = None
key = self._create_cache_key_from_trip(trip)
cached_resp = self.get_flight_from_cache(key)
if cached_resp:
return cached_resp
try:
self.flights_resp_dal.set(key, None)
request_json = self.build_trip_request(trip_data)
header = {"Content-Type": "application/JSON ", "Accept-encoding": "gzip"}
req = urllib2.Request("http://fs-json.demo.vayant.com:7080/", data=json.dumps(request_json), headers=header)
response = urllib2.urlopen(req)
resp = self._decompress_and_extract_json(response)
trip = self._get_flights_from_vayant_response(response)
if trip:
self.flights_resp_dal.remove(key)
return None
self.flights_resp_dal.set(key, trip)
finally:
if not resp:
self.flights_resp_dal.remove(key)
return resp
def _create_cache_key_from_trip(self, trip):
key = ""
for single_trip in trip:
key += single_trip["Origin"][0] + "-"
key += single_trip["Destination"][0] + "-"
for date in single_trip["DepartureDates"]:
key += date["Date"] + "-"
key += ":"
return key
def _decompress_and_extract_json(self, response):
decompressor = zlib.decompressobj(16 + zlib.MAX_WBITS)
json_resp = ""
while True:
data = response.read(8192)
if not data: break
if response.info().get('Content-Encoding') == 'gzip':
data = decompressor.decompress(data)
json_resp += data
return json.loads(json_resp)
# def print_single_flight(self, flight):
# response = "\n"
# response += flight["Fares"][0]["Origin"] + " -> " + flight["Fares"][0]["Destination"] + ":\n"
# response += "total price = {}".format(flight['Price']['Total']['Amount']) + "\n"
# response += "flights details: "+ "\n"
# for leg in flight["Flights"]:
# response += "\t" + leg["Origin"] + " -> " + leg["Destination"] + ":"+ "\n"
# response += "\t departure: " + leg["Departure"]+ "\n"
# response += "\t arrival: " + leg["Arrival"]+ "\n"
# if self.flights_resp_dal.get_airline(leg["OperatingCarrier"]) is not None:
# response += "\t carrier: " + self.flights_resp_dal.get_airline(leg["OperatingCarrier"])+ "\n"
# else:
# response += "\t carrier: " + leg["OperatingCarrier"]+ "\n"
# return response
def get_departure_flight_date(self, trip_response):
return trip_response['Flights'][0]['Departure'][0:10]
def get_return_flight_date(self, trip_response):
return trip_response['Flights'][-1]['Departure'][0:10]
def extract_cheapest_price(self, resp):
sorted_response = sorted(resp['Journeys'], key=lambda trip: trip[0]['Price']['Total']['Amount'])
try:
return sorted_response[0][0]['Price']['Total']['Amount']
except:
print "ERROR getting the price", resp, sorted_response
return 0
def get_connections_list(self, trip):
connections = set()
for single in trip['Journeys']:
if len(single[0]["Flights"]) == 2:
if single[0]["Flights"][0]["Destination"] == single[0]["Flights"][1]["Origin"]:
connections.add(single[0]["Flights"][0]["Destination"])
return connections
def get_flight(self, trip, index):
try:
x = trip['Journeys'][index][0]
return x
except:
return None
def get_price(self, flight):
if flight:
return flight['Price']['Total']['Amount']
return 99999
def get_dest_flights_in_two_way(self, trip, connection):
for i in xrange(len(trip['Flights'])-1):
if trip['Flights'][i]['Destination'] == connection:
return trip['Flights'][i], trip['Flights'][i + 1]
return None, None
def get_price_round_trip(self, origin, dest, depart_dates, arrive_dates, get_full_response = False):
first_trip = self.build_trip(origin, dest, depart_dates, 1)
second_trip = self.build_trip(dest, origin, arrive_dates, 2)
return self.get_flight_price_async([first_trip, second_trip])
def get_price_one_way(self, origin, dest, depart_dates):
first_trip = self.build_trip(origin, dest, depart_dates, 1)
return self.get_flight_price_async([first_trip])
def do_after_done(self, resp):
trip_data = resp
if trip_data and trip_data.has_key("Journeys") and trip_data['Journeys'] and len(trip_data['Journeys']) > 0:
return self.extract_cheapest_price(trip_data), trip_data
return (None, None)