def getItemLastUpdate(itemOrName):
item = _getItem(itemOrName)
lastUpdate = PersistenceExtensions.lastUpdate(item)
if lastUpdate is None:
return ZonedDateTime.ofInstant(Instant.ofEpochMilli(0),
ZoneId.systemDefault())
#raise NotInitialisedException("Item lastUpdate for '" + item.getName() + "' not found")
return lastUpdate
def getStableMinMaxItemState(now, itemName, checkTimeRange):
currentEndTime = now
currentEndTimeMillis = currentEndTime.toInstant().toEpochMilli()
minTimeMillis = currentEndTimeMillis - (checkTimeRange * 60 * 1000)
minValue = None
maxValue = None
value = 0.0
duration = 0
# get and cache "real" item to speedup getHistoricItemEntry. Otherwise "getHistoricItemEntry" will lookup the item by its name every time
item = getItem(itemName)
entry = getHistoricItemEntry(item, now)
while True:
currentStartMillis = entry.getTimestamp().toInstant().toEpochMilli()
if currentStartMillis < minTimeMillis:
currentStartMillis = minTimeMillis
_duration = currentEndTimeMillis - currentStartMillis
_value = entry.getState().doubleValue()
if minValue == None or minValue > _value:
minValue = _value
if maxValue == None or maxValue < _value:
maxValue = _value
duration = duration + _duration
value = value + (_value * _duration)
currentEndTimeMillis = currentStartMillis - 1
if currentEndTimeMillis < minTimeMillis:
break
currentEndTime = ZonedDateTime.ofInstant(
Instant.ofEpochMilli(currentEndTimeMillis), ZoneId.systemDefault())
entry = getHistoricItemEntry(item, currentEndTime)
value = (value / duration)
return [value, minValue, maxValue]