Source code for bosdyn.bddf.grpc_reader

# Copyright (c) 2021 Boston Dynamics, Inc.  All rights reserved.
#
# Downloading, reproducing, distributing or otherwise using the SDK Software
# is subject to the terms and conditions of the Boston Dynamics Software
# Development Kit License (20191101-BDSDK-SL).

"""A class for reading GRPC data from a DataFile."""

from .bosdyn import GrpcRequests, GrpcResponses
from .common import LOGGER
from .grpc_service_reader import GrpcServiceReader


[docs]class GrpcReader: """A class for reading GRPC data from a DataFile. Methods raise ParseError if there is a problem with the format of the file. """ def __init__(self, data_reader, protobuf_classes): self._data_reader = data_reader self._service_name_to_reader = {} self._series_index_to_reader = {} proto_name_to_class = { proto_class.DESCRIPTOR.full_name: proto_class for proto_class in protobuf_classes } self._proto_name_to_reader = {} for series_index, series_identifier in enumerate(data_reader.file_index.series_identifiers): print(series_index) if series_identifier.series_type not in (GrpcRequests.SERIES_TYPE, GrpcResponses.SERIES_TYPE): print(series_identifier.series_type, GrpcRequests.SERIES_TYPE, GrpcResponses.SERIES_TYPE) continue service_name = series_identifier.spec[GrpcRequests.SERVICE_NAME] message_type = series_identifier.spec[GrpcRequests.MESSAGE_TYPE] try: proto_class = proto_name_to_class[message_type] except KeyError: LOGGER.exception("Don't have a protobuf class for %s", message_type) continue try: service_reader = self._service_name_to_reader[service_name] except KeyError: service_reader = GrpcServiceReader(self, service_name) self._service_name_to_reader[service_name] = service_reader print("D") series_descriptor = self._data_reader.series_descriptor(series_index) reader = service_reader.add_proto_reader(series_index, proto_class, series_identifier.series_type, series_descriptor) if message_type not in self._proto_name_to_reader: self._proto_name_to_reader[message_type] = reader self._series_index_to_reader[series_index] = reader print(self._proto_name_to_reader.keys()) @property def data_reader(self): """Return underlying DataReader this object is using.""" return self._data_reader
[docs] def get_proto_reader(self, proto_name): """Return the GrpcProtoReader for protobuf messages with the specified type name.""" return self._proto_name_to_reader[proto_name]
[docs] def get_message(self, series_index, index_in_series): """Return a deserialized protobuf from bytes stored in the file. Args: series_index: index (int) from the series_index() call index_in_series: the index of the message within the series Returns: timestamp_nsec (int), deserialized protobuf object """ reader = self._series_index_to_reader[series_index] return reader.get_message(index_in_series)