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77 lines
3.2 KiB
77 lines
3.2 KiB
# Copyright 2023 gRPC authors. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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"""The Python implementation of the GRPC helloworld.Greeter server with keepAlive options.""" |
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from concurrent import futures |
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import logging |
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from time import sleep |
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import grpc |
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import helloworld_pb2 |
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import helloworld_pb2_grpc |
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class Greeter(helloworld_pb2_grpc.GreeterServicer): |
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def SayHello(self, request, context): |
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message = request.name |
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if message.startswith("[delay]"): |
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sleep(5) |
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return helloworld_pb2.HelloReply(message=message) |
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def serve(): |
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""" |
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grpc.keepalive_time_ms: The period (in milliseconds) after which a keepalive ping is |
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sent on the transport. |
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grpc.keepalive_timeout_ms: The amount of time (in milliseconds) the sender of the keepalive |
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ping waits for an acknowledgement. If it does not receive an acknowledgment within |
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this time, it will close the connection. |
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grpc.http2.min_ping_interval_without_data_ms: Minimum allowed time (in milliseconds) |
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between a server receiving successive ping frames without sending any data/header frame. |
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grpc.max_connection_idle_ms: Maximum time (in milliseconds) that a channel may have no |
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outstanding rpcs, after which the server will close the connection. |
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grpc.max_connection_age_ms: Maximum time (in milliseconds) that a channel may exist. |
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grpc.max_connection_age_grace_ms: Grace period (in milliseconds) after the channel |
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reaches its max age. |
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grpc.http2.max_pings_without_data: How many pings can the client send before needing to |
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send a data/header frame. |
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grpc.keepalive_permit_without_calls: If set to 1 (0 : false; 1 : true), allows keepalive |
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pings to be sent even if there are no calls in flight. |
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For more details, check: https://github.com/grpc/grpc/blob/master/doc/keepalive.md |
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""" |
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server_options = [ |
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("grpc.keepalive_time_ms", 20000), |
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("grpc.keepalive_timeout_ms", 10000), |
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("grpc.http2.min_ping_interval_without_data_ms", 5000), |
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("grpc.max_connection_idle_ms", 10000), |
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("grpc.max_connection_age_ms", 30000), |
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("grpc.max_connection_age_grace_ms", 5000), |
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("grpc.http2.max_pings_without_data", 5), |
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("grpc.keepalive_permit_without_calls", 1), |
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] |
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port = "50051" |
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server = grpc.server( |
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thread_pool=futures.ThreadPoolExecutor(max_workers=10), |
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options=server_options, |
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) |
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helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server) |
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server.add_insecure_port("[::]:" + port) |
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server.start() |
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print("Server started, listening on " + port) |
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server.wait_for_termination() |
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if __name__ == "__main__": |
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logging.basicConfig() |
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serve()
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