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# Copyright (C) 2020 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from google.protobuf import descriptor_pb2
from google.protobuf import message_factory
from google.protobuf.descriptor_pool import DescriptorPool
from .loader import get_loader
class ProtoFactory:
def __init__(self):
# Declare descriptor pool
self.descriptor_pool = DescriptorPool()
# Load trace processor descriptor and add to descriptor pool
tp_descriptor_bytes = get_loader().read_tp_descriptor()
tp_file_desc_set_pb2 = descriptor_pb2.FileDescriptorSet()
tp_file_desc_set_pb2.MergeFromString(tp_descriptor_bytes)
for f_desc_pb2 in tp_file_desc_set_pb2.file:
self.descriptor_pool.Add(f_desc_pb2)
# Load metrics descriptor and add to descriptor pool
metrics_descriptor_bytes = get_loader().read_metrics_descriptor()
metrics_file_desc_set_pb2 = descriptor_pb2.FileDescriptorSet()
metrics_file_desc_set_pb2.MergeFromString(metrics_descriptor_bytes)
for f_desc_pb2 in metrics_file_desc_set_pb2.file:
self.descriptor_pool.Add(f_desc_pb2)
def create_message_factory(message_type):
message_desc = self.descriptor_pool.FindMessageTypeByName(message_type)
return message_factory.MessageFactory().GetPrototype(message_desc)
# Create proto messages to correctly communicate with the RPC API by sending
# and receiving data as protos
self.StatusResult = create_message_factory('perfetto.protos.StatusResult')
self.ComputeMetricArgs = create_message_factory(
'perfetto.protos.ComputeMetricArgs')
self.ComputeMetricResult = create_message_factory(
'perfetto.protos.ComputeMetricResult')
self.RawQueryArgs = create_message_factory('perfetto.protos.RawQueryArgs')
self.QueryResult = create_message_factory('perfetto.protos.QueryResult')
self.TraceMetrics = create_message_factory('perfetto.protos.TraceMetrics')
self.DisableAndReadMetatraceResult = create_message_factory(
'perfetto.protos.DisableAndReadMetatraceResult')
self.CellsBatch = create_message_factory(
'perfetto.protos.QueryResult.CellsBatch')
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