def get_by_data(cls, datastring, ipaddr=None):
adapter = Adapter.detect(datastring)
if not adapter:
raise Exception("Couldn't determine adapter from datastring: %s" %
datastring)
message = adapter.decode(datastring)
if not message.imei:
raise Exception("Couldn't get imei from datastring: %s" %
datastring)
""" Try retrieving device from db
If none already, create a new one and return it
"""
try:
device = GPSDevice.objects.get(imei=message.imei)
except mongoengine.DoesNotExist:
device = GPSDevice(imei=message.imei, ipaddr=ipaddr)
device.save()
except mongoengine.MultipleObjectsReturned:
raise mongoengine.MultipleObjectsReturned(
'Found more than one device with imei %s' % message.imei)
if ipaddr and ipaddr != device.ipaddr:
device.ipaddr = ipaddr
device.save()
return device
def sent(self, datastring):
if not self.adapter:
self.adapter = Adapter.detect(datastring)
if not self.adapter:
raise Exception("Coudln't determine adapter from datastring: %s" % datastring)
# Possibly multiple messages in datastring, separated by delimiter
for messagestring in filter(lambda x:x, datastring.split(self.adapter.delimiter)):
# Set IMEI, if needed
message = self.adapter.decode(messagestring)
if not message:
break
if not self.imei:
self.imei = message.imei
message.state = config.MESSAGE_STATE_RECEIVED
message.save()
# Determine any stock responses for this type of adapter (e.g. LOAD, ON)
response = self.adapter.response_to(message)
if response:
self.responses.append(response)
# If it's a location message, record this
if config.MESSAGE_TYPE_LOCATION_FULL == message.message_type:
self.latitude = message.latitude
self.longitude = message.longitude
self.save()
maps_url = config.GOOGLE_MAPS_URI_FORMAT.format(latitude=message.latitude, longitude=message.longitude)
logger.info('received location from %s: %s' % (self.imei, maps_url))
# Get & send responses from queue
self.retrieve_messages()
def sent(self, datastring):
if not self.adapter:
self.adapter = Adapter.detect(datastring)
if not self.adapter:
raise Exception("Coudln't determine adapter from datastring: %s" %
datastring)
# Possibly multiple messages in datastring, separated by delimiter
for messagestring in filter(lambda x: x,
datastring.split(self.adapter.delimiter)):
# Set IMEI, if needed
message = self.adapter.decode(messagestring)
if not message:
break
if not self.imei:
self.imei = message.imei
message.state = config.MESSAGE_STATE_RECEIVED
message.save()
# Determine any stock responses for this type of adapter (e.g. LOAD, ON)
response = self.adapter.response_to(message)
if response:
self.responses.append(response)
# If it's a location message, record this
if config.MESSAGE_TYPE_LOCATION_FULL == message.message_type:
self.latitude = message.latitude
self.longitude = message.longitude
self.save()
maps_url = config.GOOGLE_MAPS_URI_FORMAT.format(
latitude=message.latitude, longitude=message.longitude)
logger.info('received location from %s: %s' %
(self.imei, maps_url))
# Get & send responses from queue
self.retrieve_messages()
def get_by_data(cls, datastring, ipaddr=None):
adapter = Adapter.detect(datastring)
if not adapter:
raise Exception("Couldn't determine adapter from datastring: %s" % datastring)
message = adapter.decode(datastring)
if not message.imei:
raise Exception("Couldn't get imei from datastring: %s" % datastring)
""" Try retrieving device from db
If none already, create a new one and return it
"""
try:
device = GPSDevice.objects.get(imei=message.imei)
except mongoengine.DoesNotExist:
device = GPSDevice(imei=message.imei, ipaddr=ipaddr)
device.save()
except mongoengine.MultipleObjectsReturned:
raise mongoengine.MultipleObjectsReturned('Found more than one device with imei %s' % message.imei)
if ipaddr and ipaddr != device.ipaddr:
device.ipaddr = ipaddr
device.save()
return device
"""Python File Implementing an Adapter Design Pattern"""
from dog.dog import Dog
from cow.cow import Cow
from adapter.adapter import Adapter
objects = []
cow = Cow("The Cow King", 4, 3)
dog = Dog("Pluto", 4, 1)
objects.append(Adapter(dog, speak=dog.bark))
objects.append(Adapter(cow, speak=cow.moo))
for obj in objects:
print("{} says {} and has {} legs and {} spots\n".format(
obj.name, obj.speak(), obj.legs, obj.spots))
