def _read_datavalue_history(self, rv, details):
starttime = details.StartTime
if rv.ContinuationPoint:
# Spec says we should ignore details if cont point is present
# but they also say we can use cont point as timestamp to enable stateless
# implementation. This is contradictory, so we assume details is
# send correctly with continuation point
starttime = ua.unpack_datetime(utils.Buffer(rv.ContinuationPoint))
dv, cont = self.storage.read_node_history(rv.NodeId, starttime,
details.EndTime,
details.NumValuesPerNode)
if cont:
cont = ua.pack_datetime(cont)
# rv.IndexRange
# rv.DataEncoding # xml or binary, seems spec say we can ignore that one
return dv, cont
def _read_datavalue_history(self, rv, details):
starttime = details.StartTime
if rv.ContinuationPoint:
# Spec says we should ignore details if cont point is present
# but they also say we can use cont point as timestamp to enable stateless
# implementation. This is contradictory, so we assume details is
# send correctly with continuation point
starttime = ua.unpack_datetime(utils.Buffer(rv.ContinuationPoint))
dv, cont = self.storage.read_node_history(rv.NodeId,
starttime,
details.EndTime,
details.NumValuesPerNode)
if cont:
cont = ua.pack_datetime(cont)
# rv.IndexRange
# rv.DataEncoding # xml or binary, seems spec say we can ignore that one
return dv, cont
def _read_event_history(self, rv, details):
starttime = details.StartTime
if rv.ContinuationPoint:
# Spec says we should ignore details if cont point is present
# but they also say we can use cont point as timestamp to enable stateless
# implementation. This is contradictory, so we assume details is
# send correctly with continuation point
# starttime = bytes_to_datetime(rv.ContinuationPoint)
starttime = ua.unpack_datetime(utils.Buffer(rv.ContinuationPoint))
ev, cont = self.storage.read_event_history(rv.NodeId,
starttime,
details.EndTime,
details.NumValuesPerNode,
details.Filter)
if cont:
# cont = datetime_to_bytes(dv[-1].ServerTimestamp)
cont = ua.pack_datetime(cont)
return ev, cont
def _read_event_history(self, rv, details):
starttime = details.StartTime
if rv.ContinuationPoint:
# Spec says we should ignore details if cont point is present
# but they also say we can use cont point as timestamp to enable stateless
# implementation. This is contradictory, so we assume details is
# send correctly with continuation point
# starttime = bytes_to_datetime(rv.ContinuationPoint)
starttime = ua.unpack_datetime(utils.Buffer(rv.ContinuationPoint))
ev, cont = self.storage.read_event_history(rv.NodeId,
starttime,
details.EndTime,
details.NumValuesPerNode,
details.Filter)
if cont:
# cont = datetime_to_bytes(dv[-1].ServerTimestamp)
cont = ua.pack_datetime(cont)
return ev, cont
def _read_event_history(self, rv, details):
starttime = details.StartTime
if rv.ContinuationPoint:
# Spec says we should ignore details if cont point is present
# but they also say we can use cont point as timestamp to enable stateless
# implementation. This is contradictory, so we assume details is
# send correctly with continuation point
starttime = ua.unpack_datetime(utils.Buffer(rv.ContinuationPoint))
evts, cont = self.storage.read_event_history(rv.NodeId, starttime,
details.EndTime,
details.NumValuesPerNode,
details.Filter)
results = []
for ev in evts:
field_list = ua.HistoryEventFieldList()
field_list.EventFields = ev.to_event_fields(
details.Filter.SelectClauses)
results.append(field_list)
if cont:
cont = ua.pack_datetime(cont)
return results, cont
def _read_event_history(self, rv, details):
starttime = details.StartTime
if rv.ContinuationPoint:
# Spec says we should ignore details if cont point is present
# but they also say we can use cont point as timestamp to enable stateless
# implementation. This is contradictory, so we assume details is
# send correctly with continuation point
starttime = ua.unpack_datetime(utils.Buffer(rv.ContinuationPoint))
evts, cont = self.storage.read_event_history(rv.NodeId,
starttime,
details.EndTime,
details.NumValuesPerNode,
details.Filter)
results = []
for ev in evts:
field_list = ua.HistoryEventFieldList()
field_list.EventFields = ev.to_event_fields(details.Filter.SelectClauses)
results.append(field_list)
if cont:
cont = ua.pack_datetime(cont)
return results, cont