# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved. # # 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. # pylint: disable=doc-string-missing import threading import multiprocessing import queue import os import paddle_serving_server from paddle_serving_client import Client from concurrent import futures import numpy import grpc import general_python_service_pb2 import general_python_service_pb2_grpc class Channel(queue.Queue): def __init__(self, consumer=1, maxsize=0, timeout=0, batchsize=1): super(Channel, self).__init__(maxsize=maxsize) self._maxsize = maxsize self._timeout = timeout self._batchsize = batchsize self._consumer = consumer self._pushlock = threading.Lock() self._frontlock = threading.Lock() self._pushbatch = [] self._frontbatch = None self._count = 0 def push(self, item): with self._pushlock: if len(self._pushbatch) == batchsize: self.put(self._pushbatch, timeout=self._timeout) self._pushbatch = [] self._pushbatch.append(item) def front(self): if consumer == 1: return self.get(timeout=self._timeout) with self._frontlock: if self._count == 0: self._frontbatch = self.get(timeout=self._timeout) self._count += 1 if self._count == self._consumer: self._count = 0 return self._frontbatch class Op(object): def __init__(self, inputs, outputs, server_model=None, server_port=None, device=None, client_config=None, server_name=None, fetch_names=None): self._run = False self.set_inputs(inputs) self.set_outputs(outputs) if client_config is not None and \ server_name is not None and \ fetch_names is not None: self.set_client(client_config, server_name, fetch_names) self._server_model = server_model self._server_port = server_port self._device = deviceis def set_client(self, client_config, server_name, fetch_names): self._client = Client() self._client.load_client_config(client_config) self._client.connect([server_name]) self._fetch_names = fetch_names def with_serving(self): return self._client is not None def get_inputs(self): return self._inputs def set_inputs(self, channels): if not isinstance(channels, list): raise TypeError('channels must be list type') self._inputs = channels def get_outputs(self): return self._outputs def set_outputs(self, channels): if not isinstance(channels, list): raise TypeError('channels must be list type') self._outputs = channels def preprocess(self, input_data): return input_data def midprocess(self, data): # data = preprocess(input), which must be a dict fetch_map = self._client.predict(feed=data, fetch=self._fetch_names) return fetch_map def postprocess(self, output_data): return output_data def stop(self): self._run = False def start(self): self._run = True while self._run: input_data = [] for channel in self._inputs: input_data.append(channel.front()) data = self.preprocess(input_data) if self.with_serving(): fetch_map = self.midprocess(data) output_data = self.postprocess(fetch_map) else: output_data = self.postprocess(data) for channel in self._outputs: channel.push(output_data) class GeneralPythonService( general_python_service_pb2_grpc.GeneralPythonService): def __init__(self, in_channel, out_channel): self._in_channel = in_channel self._out_channel = out_channel def Request(self, request, context): data_dict = {} for idx, name in enumerate(request.fetch_var_names): data_dict[name] = request.feedinsts[idx] self._in_channel.push(data_dict) resp = self._out_channel.front() return general_python_service_pb2_grpc.Response(resp) class PyServer(object): def __init__(self): self._channels = [] self._ops = [] self._op_threads = [] self._port = None self._worker_num = None self._in_channel = None self._out_channel = None def add_channel(self, channel): self._channels.append(channel) def add_op(self, op): slef._ops.append(op) def gen_desc(self): print('here will generate desc for paas') pass def prepare_server(self, port, worker_num): self._port = port self._worker_num = worker_num inputs = set() outputs = set() for op in self._ops: inputs += op.get_inputs() outputs += op.get_outputs() if op.with_serving(): self.prepare_serving(op) in_channel = inputs - outputs out_channel = outputs - inputs if len(in_channel) != 1 or len(out_channel) != 1: raise Exception( "in_channel(out_channel) more than 1 or no in_channel(out_channel)" ) self._in_channel = in_channel.pop() self._out_channel = out_channel.pop() self.gen_desc() def run_server(self): for op in self._ops: th = multiprocessing.Process(target=op.start, args=(op, )) th.start() self._op_threads.append(th) server = grpc.server( futures.ThreadPoolExecutor(max_workers=self._worker_num)) general_python_service_pb2_grpc.add_GeneralPythonService_to_server( GeneralPythonService(self._in_channel, self._out_channel), server) server.start() try: for th in self._op_threads: th.join() except KeyboardInterrupt: server.stop(0) def prepare_serving(self, op): model_path = op._server_model port = op._server_port device = op._device # run a server (not in PyServing) if device == "cpu": cmd = "python -m paddle_serving_server.serve --model {} --thread 4 --port {} &>/dev/null &".format( model_path, port) else: cmd = "python -m paddle_serving_server_gpu.serve --model {} --thread 4 --port {} &>/dev/null &".format( model_path, port) os.system(cmd)