# Tencent is pleased to support the open source community by making GNES available.
#
# Copyright (C) 2019 THL A29 Limited, a Tencent company. 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.
import time
import threading
import queue
from concurrent import futures
from .base import GrpcClient, ResponseHandler
[docs]class SyncClient(GrpcClient):
handler = ResponseHandler(GrpcClient.handler)
def __init__(self, args):
super().__init__(args)
self._pool = futures.ThreadPoolExecutor(
max_workers=self.args.max_concurrency)
[docs] def send_request(self, request):
# Send requests in seperate threads to support multiple outstanding rpcs
self._pool.submit(self.call, request)
[docs] def close(self):
self._pool.shutdown(wait=True)
super().close()
[docs]class StreamingClient(GrpcClient):
handler = ResponseHandler(GrpcClient.handler)
def __init__(self, args):
super().__init__(args)
self._request_queue = queue.Queue(maxsize=10)
self._is_streaming = threading.Event()
self._dispatch_thread = threading.Thread(target=self._start)
self._dispatch_thread.setDaemon(True)
[docs] def send_request(self, request):
self._request_queue.put(request, block=True)
# create a new streaming call
if not self._is_streaming.is_set():
self._dispatch_thread.start()
def _start(self):
self._is_streaming.set()
self.stream_call(self._request_generator())
self._is_streaming.clear()
def _request_generator(self):
while True:
try:
request = self._request_queue.get(block=True, timeout=5.0)
if request is None:
break
yield request
except queue.Empty:
break
except Exception as e:
self.logger.error('exception: %s' % str(e))
break
@handler.register(NotImplementedError)
def _handler_default(self, resp: 'gnes_pb2.Response'):
raise NotImplementedError
[docs] def close(self):
self._is_streaming.clear()
self._dispatch_thread.join()
super().close()