def read(self, obj_type, obj_inst, prop_id, address):
datatype = get_datatype(obj_type, prop_id)
if not datatype:
print("invalid property %s for object type %s" %
(prop_id, object_type))
return "error invalid property %s for object type %s" % (
prop_id, object_type)
# build a request
request = ReadPropertyRequest(objectIdentifier=(obj_type, obj_inst),
propertyIdentifier=prop_id)
request.pduDestination = Address(address)
# TODO: How do we handle an index? This is a 'parameterized get' case that uses b
# request.propertyArrayIndex = <handle me>
# build an IOCB, save the request
iocb = IOCB()
iocb.ioRequest = request
# give it to the application to send
_ss.this_application.do_request(request, iocb)
# wait for the response
iocb.ioComplete.wait()
# filter out errors and aborts
if isinstance(iocb.ioResponse, Error) or isinstance(
iocb.ioResponse, AbortPDU):
print("get operation failed %s %s %s" %
(obj_type, obj_inst, str(iocb.ioResponse)))
n = "error get operation failed %s %s %s" % (obj_type, obj_inst,
str(iocb.ioResponse))
else:
n = self._value_format(prop_id, iocb.ioResponse)
print("read %s %s %s %s" % (address, obj_inst, prop_id, n))
return n
def write(self, obj_type, obj_inst, prop_id, address, value):
n = ""
datatype = get_datatype(obj_type, prop_id)
if not datatype:
return "error invalid property %s for object type %s" % (
prop_id, object_type)
# set a priority
priority = 1 #o.get('priority') if o.get('priority') else 1
# TODO: How do we handle an index? This is a 'parameterized set' case
indx = None
# change atomic values into something encodeable, null is a special case
if (value == 'null'):
value = Null()
elif issubclass(datatype, Atomic):
if datatype is Integer:
value = int(value)
elif datatype is Real:
value = float(value)
elif datatype is Unsigned:
value = int(value)
value = datatype(value)
elif issubclass(datatype, Array) and (indx is not None):
if indx == 0:
value = Integer(value)
elif issubclass(datatype.subtype, Atomic):
value = datatype.subtype(value)
elif not isinstance(value, datatype.subtype):
return "error invalid result datatype, expecting %s" % (
datatype.subtype.__name__, )
elif not isinstance(value, datatype):
return "error invalid result datatype, expecting %s" % (
datatype.subtype.__name__, )
# build a request
request = WritePropertyRequest(objectIdentifier=(obj_type, obj_inst),
propertyIdentifier=prop_id)
request.pduDestination = Address(address)
# save the value
request.propertyValue = Any()
try:
request.propertyValue.cast_in(value)
except e as Exception:
return "error write property cast error %r" % e
# optional array index
if indx is not None:
request.propertyArrayIndex = indx
# optional priority
if priority is not None:
request.priority = priority
# build an IOCB, save the request
iocb = IOCB()
iocb.ioRequest = request
# give it to the application to send
_ss.this_application.do_request(request, iocb)
# wait for the response
iocb.ioComplete.wait()
# filter out errors and aborts
if isinstance(iocb.ioResponse, Error) or isinstance(
iocb.ioResponse, AbortPDU):
return "error set operation failed %s %s %s" % (
obj_inst, prop_id, str(iocb.ioResponse))
print("wrote %s %s %s %s" % (address, obj_inst, prop_id, value))
return n