class Surveyor(threading.Thread):
def __init__(self, args, manifest, monitored_devices, check_period, notifier):
super(Surveyor, self).__init__()
self._args = args
self._manifest = manifest
self._monitored_devices = monitored_devices
self._notifer = notifier
self._roll_call = SharedVarCollection({})
self._devices_poll = Periodic(check_period, self.poll_devices, "poll_devices")
return
def poll_devices(self):
for name in self._monitored_devices:
self._notifer.diagnostic("pinging %s" % name)
found = self.ping(self._manifest.address(name))
if found:
self._roll_call.set(name, True)
self._notifer.note("%s found" % name)
else:
self._roll_call.set(name, False)
self._notifer.note("%s missing" % name)
return
def ping(self, ip_address):
# NOTE: ping requires root access. Fake it during development with a random#
if hasattr(args, 'test') and args.test:
found = (random.randint(0, 3) == 3)
else:
response = pyping.ping(ip_address)
found = (response.ret_code == 0)
return found
def roll_call(self):
return self._roll_call.get()
def check(self):
self._devices_poll.check()
return
def run(self):
while gRunningFlag:
self._devices_poll.check()
return
class Tracker(threading.Thread):
def __init__(self, args, config, notifier):
super(Tracker, self).__init__()
self._args = args
self._config = config
self._monitored_devices = config.devices_details()["monitored_devices"]
self._notifer = notifier
positive_poll_period = config.general_details()["positive_poll_period"]
negative_poll_period = config.general_details()["negative_poll_period"]
self._poll = Periodic(negative_poll_period,
self.poll_devices,
"poll_devices",
notifier=notifier)
redis_info = config.redis_details()
self._rdb = redis.StrictRedis(host=redis_info["host"],
port=redis_info["port"],
db=redis_info["db_no"])
self._roll_call = {}
return
def any_detected(self):
for thisDevice, presence in self._roll_call.items():
if presence:
return True
return False
def poll_devices(self):
roll_call = {}
redis_info = config.redis_details()
previously_detected = self.any_detected()
any_detected = False
for name, address in self._monitored_devices.items():
self._notifer.diagnostic("pinging %s at %s" % (name, address))
found = self.ping(address)
if found:
any_detected = True
roll_call[name] = True
self._notifer.note("%s found" % name)
else:
roll_call[name] = False
self._notifer.note("%s missing" % name)
if previously_detected:
self._poll.reset()
# set up next poll
if any_detected and not previously_detected:
self._poll.set_period(
config.general_details()["positive_poll_period"])
elif not any_detected and previously_detected:
self._poll.set_period(
config.general_details()["negative_poll_period"])
self._roll_call = roll_call
self._rdb.set(redis_info["key_detail"], json.dumps(roll_call))
self._rdb.set(redis_info["key_summary"], json.dumps(any_detected))
return
def ping(self, ip_address):
# NOTE: ping requires root access. Fake it during development with a random#
if hasattr(args, 'test') and args.test:
found = (random.randint(0, 3) == 3)
elif USE_PYPING:
response = pyping.ping(ip_address)
found = (response.ret_code == 0)
else:
response = os.system("ping -c i %s" % ip_address)
found = (response == 0)
return found
def roll_call(self):
return self._roll_call
def check(self):
self._poll.check()
return
def run(self):
while gRunningFlag:
self.check()
return
