def get_result(self, skipCache=0, **keywords):
if not skipCache:
dt = now() - self.__cached_result.timestamp
if dt > self.__cache_ttl:
skipCache = 1
if skipCache:
value = self.__agent.snmp_get(self.__var_name)[1]
result = Result(value, now(), 0, self.__cached_result.changes+1)
self.__cached_result = Result(result.value, result.timestamp,
1, result.changes)
return result
return self.__cached_result
def _set(self, value, asyncOK=0):
self.__cached_result = Result(None, 0, 0, 0)
if not isinstance(value, base.Asn1Item):
asn1_value = self.__smi.syntax.clone(value)
else:
asn1_value = value
self.__agent.snmp_set(self.__var_name, asn1_value)
return
def get_batch(self):
timestamp = now()
if timestamp >= self.expires_at:
results = {}
for oid, value in self.agent.snmp_get_multiple(*self.oid_list):
result = Result(value, timestamp, 0)
sm_key = self.batch_map[oid].sm_key
results[sm_key] = result
self.results = results
self.expires_at = timestamp + self.ttl
return self.results
def update_value(self, value):
if self._cached_result:
previous = self._cached_result.value
if value == previous:
return False
changes = self._cached_result.changes + 1
else:
changes = 1
previous = None
self._cached_result = Result(value, uptime.secs(), 1, changes)
self._trigger_cov(previous, value, time.time())
return True
def as_result(value):
if isinstance(value, Exception):
value = error_dictionary(value)
if isinstance(value, dict):
if value.has_key('edt__typ'):
value = edtlib.edt_decode(value)
elif (value.get('__base__') == 'Result' or
all(value.has_key(key) for key in
["cached", "changes", "timestamp", "value"])):
value = Result.from_dict(value)
if not isinstance(value, Result):
msglog.log("broadway", msglog.types.WARN,
"Unable to convert %r to Result." % (value,))
return value
def update(self, msg):
self._last_rcvd = uptime.secs()
if self._cached_result is None:
change_count = 1
last_value = None
else:
change_count = self._cached_result.changes + 1
last_value = self._cached_result.value
if isinstance(msg, Exception):
value = msg
else:
value = getattr(msg, self.prop_name)
self._cached_result = Result(value, time.time(), changes=change_count)
self._trigger_cov(last_value)
def __init__(self, parent=None, info=None):
super(ScalarInstance, self).__init__()
self.__cache_ttl = -1
self.__agent = None
self.__smi = None
self.__var_name = None
# By using a valid, but expired __cached_result the number of checks
# can be reduced.
self.__cached_result = Result(None, 0, 0, 0)
self.index = REQUIRED
# Both parent and info must be None, or both must NOT be None
assert (parent is None) == (info is None)
if parent is not None:
self.__cfg_from_info(parent, info)
return
def update(self, value):
ts = time.time()
if self._last_result is None:
last_ts = ts
changes = 0
else:
last_ts = self._last_result.timestamp
changes = self._last_result.changes
if not isinstance(value, Exception):
# we've found that different servers
# ie. pg&e vs sce, despite sharing wsdl's
# have different return values. :(
value = self._get_value(value)
self._last_result = Result(value, ts, 0, changes)
return
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)
def update_cache(self, value):
now = uptime.secs()
if isinstance(value, ValueObj):
value = value.get(self.prop_name)
if value is None or isinstance(value, Exception):
value = ETimeout()
if value != self._cached_value:
if self.event_has_subscribers():
self._trigger_cov(self._cached_value, value, time.time())
self._cached_value = value
if self._cached_result is None:
changes = 0
else:
changes = self._cached_result.changes + 1
self._cached_result = Result(self._cached_value, self._last_rcvd,
changes)
self._last_rcvd = now
return
def update(self, result):
if not isinstance(result, Result):
if isinstance(result, dict):
result = Result.from_dict(result)
else:
message = "update() expects Result instance, not: %r"
raise ValueError(message % result)
self.synclock.acquire()
try:
if self.initialized():
previous = self.get_value()
else:
previous = None
self.result = result
value = self.get_value()
self.updated = uptime.secs()
finally:
self.synclock.release()
if self.support_cov:
self.event_generate(COVEvent(self, previous, value, time.time()))
if self.debug:
msglog.debug("%s updated: %r" % (self, result))
def update(self, result):
if not isinstance(result, Result):
if isinstance(result, dict):
result = Result.from_dict(result)
else:
message = "update() expects Result instance, not: %r"
raise ValueError(message % result)
self.synclock.acquire()
try:
if self.initialized():
previous = self.get_value()
else:
previous = None
self.result = result
value = self.get_value()
self.updated = uptime.secs()
finally:
self.synclock.release()
if self.support_cov:
self.event_generate(COVEvent(self, previous, value, time.time()))
if self.debug:
msglog.debug("%s updated: %r" % (self, result))
def get_result(self, skipCache=False):
return Result(self.get(skipCache), time.time(), cached=False)
def get_result(self, skipCache=0, **keywords):
return Result(self.get(), time.time())
def get_result(self, skipCache=0):
return Result(self.get(), time.time(), 0, 0)
def as_result(self):
answer = self.value
if not isinstance(answer, Result):
answer = Result(answer, self.timestamp)
return answer
def _update_cached_value(self, value):
self.__cached_result = Result(value, now(), 1,
self.__cached_result.changes+1)
return
def _reset_result(self):
result = Result({"net": None, "framework": None}, 0, 1, 0)
self.last_update = 0
self.last_refresh = 0
self._cached_result = result