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# Copyright 2016 gRPC authors.
#
# 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.
"""Defines test client behaviors (UNARY/STREAMING) (SYNC/ASYNC)."""
import abc
import threading
import time
from concurrent import futures
from six.moves import queue
import grpc
from src.proto.grpc.testing import messages_pb2
from src.proto.grpc.testing import benchmark_service_pb2_grpc
from tests.unit import resources
from tests.unit import test_common
_TIMEOUT = 60 * 60 * 24
class GenericStub(object):
def __init__(self, channel):
self.UnaryCall = channel.unary_unary(
'/grpc.testing.BenchmarkService/UnaryCall')
self.StreamingCall = channel.stream_stream(
'/grpc.testing.BenchmarkService/StreamingCall')
class BenchmarkClient:
"""Benchmark client interface that exposes a non-blocking send_request()."""
__metaclass__ = abc.ABCMeta
def __init__(self, server, config, hist):
# Create the stub
if config.HasField('security_params'):
creds = grpc.ssl_channel_credentials(
resources.test_root_certificates())
channel = test_common.test_secure_channel(
server, creds, config.security_params.server_host_override)
else:
channel = grpc.insecure_channel(server)
# waits for the channel to be ready before we start sending messages
grpc.channel_ready_future(channel).result()
if config.payload_config.WhichOneof('payload') == 'simple_params':
self._generic = False
self._stub = benchmark_service_pb2_grpc.BenchmarkServiceStub(
channel)
payload = messages_pb2.Payload(
body='\0' * config.payload_config.simple_params.req_size)
self._request = messages_pb2.SimpleRequest(
payload=payload,
response_size=config.payload_config.simple_params.resp_size)
else:
self._generic = True
self._stub = GenericStub(channel)
self._request = '\0' * config.payload_config.bytebuf_params.req_size
self._hist = hist
self._response_callbacks = []
def add_response_callback(self, callback):
"""callback will be invoked as callback(client, query_time)"""
self._response_callbacks.append(callback)
@abc.abstractmethod
def send_request(self):
"""Non-blocking wrapper for a client's request operation."""
raise NotImplementedError()
def start(self):
pass
def stop(self):
pass
def _handle_response(self, client, query_time):
self._hist.add(query_time * 1e9) # Report times in nanoseconds
for callback in self._response_callbacks:
callback(client, query_time)
class UnarySyncBenchmarkClient(BenchmarkClient):
def __init__(self, server, config, hist):
super(UnarySyncBenchmarkClient, self).__init__(server, config, hist)
self._pool = futures.ThreadPoolExecutor(
max_workers=config.outstanding_rpcs_per_channel)
def send_request(self):
# Send requests in seperate threads to support multiple outstanding rpcs
# (See src/proto/grpc/testing/control.proto)
self._pool.submit(self._dispatch_request)
def stop(self):
self._pool.shutdown(wait=True)
self._stub = None
def _dispatch_request(self):
start_time = time.time()
self._stub.UnaryCall(self._request, _TIMEOUT)
end_time = time.time()
self._handle_response(self, end_time - start_time)
class UnaryAsyncBenchmarkClient(BenchmarkClient):
def send_request(self):
# Use the Future callback api to support multiple outstanding rpcs
start_time = time.time()
response_future = self._stub.UnaryCall.future(self._request, _TIMEOUT)
response_future.add_done_callback(
lambda resp: self._response_received(start_time, resp))
def _response_received(self, start_time, resp):
resp.result()
end_time = time.time()
self._handle_response(self, end_time - start_time)
def stop(self):
self._stub = None
class _SyncStream(object):
def __init__(self, stub, generic, request, handle_response):
self._stub = stub
self._generic = generic
self._request = request
self._handle_response = handle_response
self._is_streaming = False
self._request_queue = queue.Queue()
self._send_time_queue = queue.Queue()
def send_request(self):
self._send_time_queue.put(time.time())
self._request_queue.put(self._request)
def start(self):
self._is_streaming = True
response_stream = self._stub.StreamingCall(self._request_generator(),
_TIMEOUT)
for _ in response_stream:
self._handle_response(
self,
time.time() - self._send_time_queue.get_nowait())
def stop(self):
self._is_streaming = False
def _request_generator(self):
while self._is_streaming:
try:
request = self._request_queue.get(block=True, timeout=1.0)
yield request
except queue.Empty:
pass
class StreamingSyncBenchmarkClient(BenchmarkClient):
def __init__(self, server, config, hist):
super(StreamingSyncBenchmarkClient, self).__init__(server, config, hist)
self._pool = futures.ThreadPoolExecutor(
max_workers=config.outstanding_rpcs_per_channel)
self._streams = [
_SyncStream(self._stub, self._generic, self._request,
self._handle_response)
for _ in xrange(config.outstanding_rpcs_per_channel)
]
self._curr_stream = 0
def send_request(self):
# Use a round_robin scheduler to determine what stream to send on
self._streams[self._curr_stream].send_request()
self._curr_stream = (self._curr_stream + 1) % len(self._streams)
def start(self):
for stream in self._streams:
self._pool.submit(stream.start)
def stop(self):
for stream in self._streams:
stream.stop()
self._pool.shutdown(wait=True)
self._stub = None
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