def _cov_check(self, new_value):
if new_value != self._old_value:
cov = ChangeOfValueEvent(self, self._old_value, new_value,
time.time())
self._old_value = new_value
self.event_generate(cov) #trigger the event using the Mixin class.
return
def __init__(self):
self._running = 0
self.driver = None
self.mac_address = None
self.discovery_mode = 'None'
CompositeNode.__init__(self)
AutoDiscoveredNode.__init__(self)
EventProducerMixin.__init__(self)
self.device_map = {} #keyed by mac address of clients; value=Child node
self._out_q = [] #request queue
self._out_q_cv = threading.Condition()
self._mutex = threading.Lock() #prevent multiple access to outbound commands
self._registered_clients = {}
self.transceiver_state = TransceiverState[0]
self.cov = ChangeOfValueEvent(self, None, self.transceiver_state)
self.debug = debug
self.timeout = 10 #seconds
self.who_is_interval = 10 #seconds
self.default_discovered_protocol_module = None
# @todo
# initailize this through configuration
self.default_discovered_protocol_module = feu
self.transceiver_state = 0
self.relay_node = '/interfaces/relay1' #this is temporary, should be None
self.active_devices = {}
self.status = None
def _trigger_cov(self):
try:
v = self.get()
except:
v = ETimeout()
cov = ChangeOfValueEvent(self, self._last_value, v, time.time())
self.event_generate(cov)
self._last_value = v
def event_subscribe(self, *args):
EventProducerMixin.event_subscribe(self, *args)
self.old_value = self.get()
# generate initial event
self.event_generate(
ChangeOfValueEvent(self, self.old_value, self.old_value,
time.time()))
self.cache.add_callback((self.group_id, self.addr), self._trigger_cov)
def prune(self, force=False):
CompositeNode.prune(self, force)
new_value = ENoSuchNode(self._pruned_url)
self._value = new_value
cov = ChangeOfValueEvent(self, self._old_value, new_value, time.time())
self._old_value = new_value
self.event_generate(cov)
return
def event_subscribe(self, *args):
EventProducerMixin.event_subscribe(self, *args)
try:
self._last_value = self.get()
except:
self._last_value = None
# generate initial event
self.event_generate(ChangeOfValueEvent(self, self._last_value, self._last_value, time.time()))
def trigger_cov(self):
if not self.event_class_consumer_count:
return
v = self.get()
if v != self._last_value:
cov = ChangeOfValueEvent(self, self._last_value, v, time.time())
self.event_generate(cov)
self.old_value = v
return
def update(self, data):
self.__cv.acquire()
try:
self._old_value = self._value
self._value = data.get('relayState1')
self._last_update = uptime.secs()
self.__cv.notifyAll()
self.event_generate(ChangeOfValueEvent(self, self._old_value,
self._value, time.time()))
finally:
self.__cv.release()
def _set(self, value):
self._value_lock.acquire()
self._value_condition.acquire()
try:
old = self.__value
self.__value = value
self._value_condition.notifyAll()
finally:
self._value_lock.release()
self._value_condition.release()
if old != value:
self.event_generate(ChangeOfValueEvent(self, old, value))
def _cov_event_callback(self, point_data_object):
try:
new_value = {
'value': point_data_object.value,
'status': point_data_object.state & 1
}
cov = ChangeOfValueEvent(self, self._old_value, new_value,
time.time())
self._old_value = new_value
self.event_generate(cov) # - trigger the event. This is on
# the line handler thread.
except:
msglog.exception()
return
def _cov_event_callback(self, point_data_object):
try:
new_value = point_data_object.value
self._value = new_value
self._state = point_data_object.state
cov = ChangeOfValueEvent(self, self._old_value, new_value,
time.time())
self._old_value = new_value
self.event_generate(cov) # - trigger the event. This is on the
# line handler thread.
if self.__status:
# Update the _status child handle value too:
self.__status._cov_event_callback(point_data_object)
except:
msglog.exception()
return
def __init__(self, mac_address=None):
self.running = 0
self._children_have_been_discovered = 0
Port.__init__(self)
AutoDiscoveredNode.__init__(self)
EventProducerMixin.__init__(self)
if mac_address:
self.mac_address = mac_address
else:
self.mac_address = REQUIRED
self.in_range = None
self.debug = debug
self.transceiver_state = TransceiverState[0]
self.cov = ChangeOfValueEvent(self, None, self.transceiver_state)
self.from_discovery = 0 # 1: remote xcvr assoc'd with this node was discovered by Aerocomm Protocol code
self.from_config = 0 # 1: remote xcvr assocd with this node was specified in config recvd from Client App
def update_cache(self):
self.updated(True)
fwstatus = self.fw_node.get()
netstatus = int(bool(self.net_node.get()))
value = {"net": netstatus, "framework": fwstatus}
if self._cached_result:
previous = self._cached_result.value
if value == previous:
return
changes = self._cached_result.changes + 1
else:
changes = 1
previous = None
self._cached_result = Result(value, self.refreshed(), 1, changes)
event = ChangeOfValueEvent(self, previous, value, time.time())
self.event_generate(event)
self.state_changed(True)
class GetViaCOV(EventConsumerAbstract):
def __init__(self, source_node, timeout=960):
EventConsumerAbstract.__init__(self)
self.__node = as_internal_node(source_node)
self.__cond = Condition()
self.__event = None
self.__sched = None #scheduled action to unsubscribe the point
self.__timeout = timeout #number of seconds to maintain subscription
self._event_received = False
return
def get_event(self, **keywords):
if self.__node._pruned_url:
try:
self.__node = as_internal_node(self.__node._pruned_url)
except ENoSuchName, e:
raise ENoSuchNode(self.__node._pruned_url)
self.__cond.acquire()
try:
if self.__event is None:
self.__node.event_subscribe(self, ChangeOfValueEvent)
#@todo add a way to get subscription started without blocking - ie return a value of None - based on keyword?
do_not_wait = keywords.get('do_not_wait', None)
if do_not_wait:
#create a dummy event and put None in the value and return that
self.__event = ChangeOfValueEvent(self.__node, None, None)
else:
self.__cond.wait() #block until the value shows up
elif not self._event_received: #if event not nil and no event received it means 'do_not_wait' was used on first call
do_not_wait = keywords.get('do_not_wait', None)
if not do_not_wait:
self.__cond.wait(
) #if do_not_wait was used on last call, now we wait for cov
if self.__sched:
sched = self.__sched.reset(
) #if it's too late to reschedule, this returns None
if sched is None: #too late
self.__sched.cancel() #try to cancel it
self.__sched = sched
if self.__sched is None: #first time or after expiration
self.__sched = scheduler.after(self.__timeout,
self.unsubscribe)
return self.__event
finally:
self.__cond.release()
def event_subscribe(self, *args):
result = EventProducerMixin.event_subscribe(self, *args)
# @note: COV model REQUIRES generating an initial event.
self.event_generate(
ChangeOfValueEvent(self, self.get(), self.get(), time.time()))
return result
def notify(self):
value = self.get()
if value != self.lastvalue:
event = ChangeOfValueEvent(self, self.lastvalue, value)
self.event_generate(event)
self.lastvalue = value
def __dispatch_cov(self, last_result, result):
cov = ChangeOfValueEvent(self, last_result, result, result.timestamp)
return self.__dispatcher.dispatch(cov)
def event_subscribe(self, *args):
super(LightPoint, self).event_subscribe(self, *args)
self._old_value = self.get()
# generate initial event
self.event_generate(ChangeOfValueEvent(self, self._old_value,
self._old_value, time.time()))
def _trigger_cov(self, old_value, new_value, t):
cov = ChangeOfValueEvent(self, old_value, new_value, t)
self.event_generate(cov)
return
def _trigger_cov(self, old_value, new_value, timestamp=None):
if not timestamp:
timestamp = time.time()
cov = ChangeOfValueEvent(self, old_value, new_value, timestamp)
self.event_generate(cov)
def _trigger_cov(self, new_value, old_value):
if new_value != old_value: # prevent needless events for unchanging value
cov_event = ChangeOfValueEvent(self, old_value, \
new_value, time.time())
self.event_generate(cov_event)
def event_subscribe(self, *args):
result = EventProducerMixin.event_subscribe(self, *args)
event = ChangeOfValueEvent(self, self.get(), self.get(), time.time())
self.event_generate(event)
return result
def _trigger_cov(self, old_value):
cov = ChangeOfValueEvent(self, old_value, self._cached_result.value,
time.time())
self.event_generate(cov)
