class Client:
HOST = environment.listener_host
PORT = environment.listener_port
logger = None
def __init__(self):
self.logger = LoggerService().get_instance()
def handle(self):
self.logger.info('Will send data to {}:{}'.format(
self.HOST, self.PORT))
try:
self.logger.info('Starting acarsdec.')
acarsdec_cmd = ('acarsdec', '-A', '-j',
'{}:{}'.format(self.HOST, self.PORT), '-o0', '-r',
'0', *settings.acars_frequencies)
self.logger.info('Executing: {}'.format(' '.join(acarsdec_cmd)))
os.execlp(*acarsdec_cmd)
except OSError as msg:
self.logger.error('Failed to start acarsdec. Error:' + str(msg))
sys.exit()
except (KeyboardInterrupt, SystemExit):
self.logger.warning('Exiting gracefully.')
sys.exit()
class ClientFake:
HOST = environment.listener_host
PORT = environment.listener_port
MESSAGES = [
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-25,"error":0,"mode":"2","label":"Q0","block_id":"0","ack":false,"tail":"VP-BOA","flight":"FV5786","msgno":"S98A"}}',
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-24,"error":0,"mode":"2","label":"Q0","block_id":"1","ack":false,"tail":"VP-BOA","flight":"FV5786","msgno":"S99A"}}',
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-25,"error":0,"mode":"H","label":"16","block_id":"2","ack":false,"tail":"VP-BOA","flight":"FV5786","msgno":"M87A","text":"143218,36000,1807, 267,N 38.027 E 24.548"}}',
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-25,"error":0,"mode":"H","label":"SA","block_id":"3","ack":false,"tail":"VP-BOA","flight":"FV5786","msgno":"S01A","text":"0EV143628V/"}}',
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-26,"error":0,"mode":"H","label":"_d","block_id":"1","ack":false,"tail":"EC-MIH","flight":"UX1302","msgno":"S21A"}}',
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-25,"error":0,"mode":"H","label":"83","block_id":"4","ack":false,"tail":"EC-MIH","flight":"UX1302","msgno":"M22A","text":"LLBG,LEMD,071445, 37.14, 23.05,40000,256,- 70.9, 20200"}}',
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-25,"error":0,"mode":"X","label":"B9","block_id":"1","ack":false,"tail":"CEPL21","flight":"XA0001","msgno":"L03A","text":"/LTAI.TI2/024LTAIA5853"}}',
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-23,"error":0,"mode":"X","label":"B9","block_id":"1","ack":false,"tail":"CEPL21","flight":"XA0001","msgno":"L03A","text":"/LTAI.TI2/024LTAIA5853"}}',
'{{"timestamp":{},"station_id":"client","channel":2,"freq":131.725,"level":-19,"error":0,"mode":"H","label":"H1","block_id":"9","ack":false,"tail":"OKVEA","flight":"GS0943","msgno":"104P","text":"#T1B CLIMB 1 B\r\n48044824062.0064.8079081051053084.8080.310310204.403.630730900\r\n094.9094.9090.0090.200000000.800.8000000001100110110404950950\r\n"}}'
]
logger = None
def __init__(self):
self.logger = LoggerService().get_instance()
def handle(self):
# create dgram udp socket
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.logger.info('Socket created.')
except OSError as msg:
self.logger.error('Failed to create socket. Error:' + str(msg))
sys.exit()
while True:
current_timestamp = datetime.strftime(datetime.utcnow(), '%s')
msg = random.choice(self.MESSAGES).format(current_timestamp)
try:
sock.sendto(msg.encode(), (self.HOST, self.PORT))
self.logger.info('Data sent.')
except (KeyboardInterrupt, SystemExit):
self.logger.warning('Exiting gracefully.')
break
except OSError as msg:
self.logger.error('Error sending data: ' + str(msg))
sys.exit()
time.sleep(5)
sock.close()
class ImageDownload:
adapter = None
logger = None
def __init__(self):
self.adapter = SqliteAdapter.get_instance()
self.logger = LoggerService().get_instance()
def handle(self):
try:
connection = pika.BlockingConnection(
pika.ConnectionParameters(host=environment.queue_host))
channel = connection.channel()
channel.queue_declare(queue=settings.queue_name_image_download,
durable=True)
channel.basic_qos(prefetch_count=1)
channel.basic_consume(queue=settings.queue_name_image_download,
on_message_callback=self.callback)
channel.start_consuming()
except (AMQPConnectionError, AMQPChannelError, ChannelClosed,
ConnectionClosed, DuplicateConsumerTag,
NoFreeChannels) as ex_consume:
self.logger.error(str(ex_consume))
return None
self.logger.info('RabbitMQ connection has been set up.')
def callback(self, channel, method, properties, body):
try:
body_dict = json.loads(body)
aircraft = Aircraft([
body_dict['id'], body_dict['registration'], body_dict['image'],
body_dict['first_seen'], body_dict['last_seen']
])
ImageService(self.adapter, self.logger).handle(aircraft)
channel.basic_ack(delivery_tag=method.delivery_tag)
self.logger.info('RabbitMQ job done!')
except (AMQPConnectionError, AMQPChannelError, ChannelClosed,
ConnectionClosed, NoFreeChannels) as ex_ack:
self.logger.error(str(ex_ack))
try:
channel.basic_nack(delivery_tag=method.delivery_tag)
return None
except (AMQPConnectionError, AMQPChannelError, ChannelClosed,
ConnectionClosed, NoFreeChannels) as ex_nack:
self.logger.error(str(ex_nack))
return None