def AddItemCache(itemsCache, forceOverWrite):
if (itemsCache is None or not (itemsCache is ItemCache)):
raise errors.ArgumentError("Parameter is invalid (itemsCache)")
return itemsCache.Save(forceOverWrite)
pass
def _ConvertObjToRedisValue(value):
if (value is None):
raise errors.ArgumentError("Parameter is invalid (value)")
result = value
statusItem = _StatusItem_None
if ((type(value) is int) or (type(value) is float) or (type(value) is long)
or (type(value) is complex) or (type(value) is bool)):
pass
elif ((type(value) is str) or (type(value) is unicode)):
if (config.UseCompression):
result = _Deflate(result, _COMPRESS)
statusItem = _StatusItem_Compressed
else:
pass
else:
if (config.UseCompression):
result = _Serialize(result, _SERIALIZE)
result = _Deflate(result, _COMPRESS)
statusItem = _StatusItem_Compressed + _StatusItem_Serialized
else:
result = _Serialize(result, _SERIALIZE)
statusItem = _StatusItem_Serialized
return result, statusItem
def GetItemCache(self, key):
if (key is None or key.strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key)")
_dal = dal._RedisDal()
result = _dal.GetListItem(key)
if (result != None and len(result) > 0):
ttl_Dt = utilities._TTL_DT_DeSerialize(result[0])
ttl_Ts = utilities._TTL_TS_DeSerialize(result[0])
if (utilities._TTL_Is_Expired(ttl_Dt)):
_dal.DeleteTTL(key)
return None
else:
# Update SLI TTL on Redis...
if (ttl_Dt[0] != datetime.datetime.max):
ttl = utilities._TTLSerialize(ttl_Ts[0], ttl_Ts[1],
ttl_Dt[1])
_dal.UpdateTTL_Item(key, ttl)
_dal.SetTTL(key, ttl_Ts[0])
else:
pass
ic = ItemCache()
ic.SlidingExpiration = ttl_Ts[0]
ic.AbsoluteExpiration = ttl_Ts[1]
ic.Key = key
ic.Value = result[1]
return ic
else:
return None
pass
def GetValue(self, key):
if (key is None or key.strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key)")
result = self.GetItemCache(key)
if (result != None):
return result.Value
else:
return None
pass
def ItemExist(self, key):
if (key is None or str(key).strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key)")
try:
result = self._db.exists(key)
return result
except (Exception):
raise
finally:
pass
pass
def SetTTL(self, key, ttl):
if (key is None or str(key).strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key)")
try:
result = self._db.expire(key, ttl)
return result
except (Exception):
raise
finally:
pass
pass
def _TTL_Is_Expired(ttl):
if (ttl is None):
raise errors.ArgumentError("Parameter is invalid (ttl)")
dtNow = datetime.datetime.utcnow()
dt = ttl
if (type(ttl) is str):
dt = _TTL_DT_DeSerialize(ttl)
if (dtNow > dt[0]) or (dtNow > dt[1]):
return True
else:
return False
def UpdateTTL_Item(self, key, ttl):
if (key is None or str(key).strip() == "" or ttl is None
or str(ttl).strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key or value)")
try:
result = self._db.lset(key, 0, ttl)
return result
except (Exception):
raise
finally:
pass
pass
def AddListItem(self, key, value):
if (key is None or str(key).strip() == "" or value is None
or str(value).strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key or value)")
try:
#value = utilities._ConvertObjToRedisValue(value) #TODO
result = self._db.rpush(key, value)
return result
except (Exception):
raise
finally:
pass
pass
def _ConvertRedisValueToObject(value, statusItem):
if (value is None or statusItem is None):
raise errors.ArgumentError(
"Parameter is invalid (value or statusItem)")
result = value
if ((statusItem & _StatusItem_None) == _StatusItem_None):
pass
if ((statusItem & _StatusItem_Compressed) == _StatusItem_Compressed):
result = _Deflate(result, _DECOMPRESS)
pass
if ((statusItem & _StatusItem_Serialized) == _StatusItem_Serialized):
result = _Serialize(result, _DESERIALIZE)
pass
return result
def AddListItemWithTTL(self, key, value, value_ttl):
if (key is None or str(key).strip() == "" or value is None
or str(value).strip() == "" or value_ttl is None
or str(value_ttl).strip() == ""):
raise errors.ArgumentError(
"Parameter is invalid (key or value or value_ttl)")
try:
result = self._db.rpush(key, value_ttl)
result = self._db.rpush(key, value)
return result
except (Exception):
raise
finally:
pass
pass
def GetListItem(self, key):
if (key is None or str(key).strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key)")
try:
val = self._db.lrange(key, 0, 1)
if (val is None or len(val) == 0):
result = None
else:
#val = utilities._ConvertRedisValueToObject(value, t) #TODO
result = (val[0], val[1])
return result
except (Exception):
raise
finally:
pass
pass
def _TTL_DT_DeSerialize(ttl):
if (ttl is None or ttl.strip() == ""):
raise errors.ArgumentError("Parameter is invalid (ttl)")
dts = ttl.split("|")
dtSLI = datetime.datetime.max
dtABS = datetime.datetime.max
if (dts[0] != _No_TTL):
dtSLI = datetime.datetime.strptime(dts[0], "%Y%m%dT%H%M%S")
pass
if (dts[2] != _No_TTL):
dtABS = datetime.datetime.strptime(dts[2], "%Y%m%dT%H%M%S")
pass
result = (dtSLI, dtABS)
return result
def _TTL_TS_DeSerialize(ttl):
if (ttl is None or ttl.strip() == ""):
raise errors.ArgumentError("Parameter is invalid (ttl)")
dts = ttl.split("|")
tsSLI = _NO_EXPIRATION
tsABS = _NO_EXPIRATION
if (dts[1] != _No_TTL):
tsSLI = datetime.timedelta(seconds=int(dts[1]))
pass
if (dts[3] != _No_TTL):
tsABS = datetime.timedelta(seconds=int(dts[3]))
pass
result = (tsSLI, tsABS)
return result
def Add(self, key, value, slidingExpiration, absoluteExpiration,
forceOverWrite):
if (key is None or key.strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key)")
if (slidingExpiration != utilities._NO_EXPIRATION
and absoluteExpiration != utilities._NO_EXPIRATION) and (
slidingExpiration >= absoluteExpiration):
raise errors.GenericError(
"Sliding Expiration is greater or equal than Absolute Expiration."
)
pass
_dal = dal._RedisDal()
ttl = utilities._TTLSerialize(slidingExpiration, absoluteExpiration,
datetime.datetime.max)
if (self._TypeStorage == config.UseList):
if (not forceOverWrite):
if (_dal.ItemExist(key)):
raise errors.GenericError("This Item Exists.")
pass
else:
# Continue...
pass
pass
else:
if (_dal.ItemExist(key)):
_dal.ItemDelete(key)
pass
else:
# Continue...
pass
pass
pass
result = _dal.AddListItemWithTTL(key, value, ttl)
self._SetTTL(key, slidingExpiration, absoluteExpiration, _dal)
return result
else:
raise errors.GenericError("NotImplementedException.")
pass
pass
def Delete(self, key):
if (key is None or key.strip() == ""):
raise errors.ArgumentError("Parameter is invalid (key)")
_dal = dal._RedisDal()
return _dal.DeleteTTL(key)
