def load_sgf(self, sgf_data):
"""Load, persist a sensor_graph file.
The data passed in `sgf_data` can either be a path or the already
loaded sgf lines as a string. It is determined to be sgf lines if
there is a '\n' character in the data, otherwise it is interpreted as
a path.
Note that this scenario just loads the sensor_graph directly into the
persisted sensor_graph inside the device. You will still need to
reset the device for the sensor_graph to enabled and run.
Args:
sgf_data (str): Either the path to an sgf file or its contents
as a string.
"""
if '\n' not in sgf_data:
with open(sgf_data, "r") as infile:
sgf_data = infile.read()
model = DeviceModel()
parser = SensorGraphFileParser()
parser.parse_file(data=sgf_data)
parser.compile(model)
opt = SensorGraphOptimizer()
opt.optimize(parser.sensor_graph, model=model)
sensor_graph = parser.sensor_graph
self._logger.info("Loading sensor_graph with %d nodes, %d streamers and %d configs",
len(sensor_graph.nodes), len(sensor_graph.streamers), len(sensor_graph.config_database))
# Directly load the sensor_graph into our persisted storage
self.sensor_graph.persisted_nodes = sensor_graph.dump_nodes()
self.sensor_graph.persisted_streamers = sensor_graph.dump_streamers()
self.sensor_graph.persisted_constants = []
for stream, value in sorted(sensor_graph.constant_database.items(), key=lambda x: x[0].encode()):
reading = IOTileReading(stream.encode(), 0, value)
self.sensor_graph.persisted_constants.append((stream, reading))
self.sensor_graph.persisted_exists = True
# Clear all config variables and load in those from this sgf file
self.config_database.clear()
for slot in sorted(sensor_graph.config_database, key=lambda x: x.encode()):
for conf_var, (conf_type, conf_val) in sorted(sensor_graph.config_database[slot].items()):
self.config_database.add_direct(slot, conf_var, conf_type, conf_val)
# If we have an app tag and version set program them in
app_tag = sensor_graph.metadata_database.get('app_tag')
app_version = sensor_graph.metadata_database.get('app_version')
if app_tag is not None:
if app_version is None:
app_version = "0.0"
self.app_info = (app_tag, app_version)
