def read_event_history(self, starttime=None, endtime=None, numvalues=0, evtypes=ua.ObjectIds.BaseEventType):
"""
Read event history of a source node
result code from server is checked and an exception is raised in case of error
If numvalues is > 0 and number of events in period is > numvalues
then result will be truncated
"""
details = ua.ReadEventDetails()
if starttime:
details.StartTime = starttime
else:
details.StartTime = ua.get_win_epoch()
if endtime:
details.EndTime = endtime
else:
details.EndTime = ua.get_win_epoch()
details.NumValuesPerNode = numvalues
if not isinstance(evtypes, (list, tuple)):
evtypes = [evtypes]
evtypes = [Node(self.server, evtype) for evtype in evtypes]
evfilter = events.get_filter_from_event_type(evtypes)
details.Filter = evfilter
result = self.history_read_events(details)
event_res = []
for res in result.HistoryData.Events:
event_res.append(events.Event.from_event_fields(evfilter.SelectClauses, res.EventFields))
return event_res
def read_event_history(self,
starttime=None,
endtime=None,
numvalues=0,
evtype=ua.ObjectIds.BaseEventType):
"""
Read event history of a source node
result code from server is checked and an exception is raised in case of error
If numvalues is > 0 and number of events in period is > numvalues
then result will be truncated
"""
# FIXME event filter must be supplied externally, the problem is the node class doesn't have a way to get
# FIXME another node from the address space as these methods are at the server level, therefore there is
# FIXME no way to build an event filter here (although it could be nicer for a user who doesn't want a filter)
details = ua.ReadEventDetails()
if starttime:
details.StartTime = starttime
else:
details.StartTime = ua.DateTimeMinValue
if endtime:
details.EndTime = endtime
else:
details.EndTime = ua.DateTimeMinValue
details.NumValuesPerNode = numvalues
evfilter = events.get_filter_from_event_type(Node(self.server, evtype))
details.Filter = evfilter
result = self.history_read_events(details)
event_res = []
for res in result.HistoryData.Events:
event_res.append(
events.Event.from_event_fields(evfilter.SelectClauses,
res.EventFields))
return event_res
