grpc_server_with_reflection_service_for_runtime_discovery.py

1# Copyright 2015 gRPC authors.
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#     http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14"""The Python implementation of the GRPC helloworld.Greeter server with reflection."""
15
16from concurrent import futures
17import logging
18
19import grpc
20from grpc_reflection.v1alpha import reflection
21
22import helloworld_pb2
23import helloworld_pb2_grpc
24
25
26class Greeter(helloworld_pb2_grpc.GreeterServicer):
27    def SayHello(self, request, context):
28        return helloworld_pb2.HelloReply(message="Hello, %s!" % request.name)
29
30
31def serve():
32    port = "50051"
33    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
34    helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
35    
36    # Enable reflection on the server
37    SERVICE_NAMES = (
38        helloworld_pb2.DESCRIPTOR.services_by_name["Greeter"].full_name,
39        reflection.SERVICE_NAME,
40    )
41    reflection.enable_server_reflection(SERVICE_NAMES, server)
42    
43    server.add_insecure_port("[::]:" + port)
44    server.start()
45    print("Server started, listening on " + port)
46    server.wait_for_termination()
47
48
49if __name__ == "__main__":
50    logging.basicConfig()
51    serve()