text: # Copyright 2015, Google Inc.
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  #
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  # notice, this list of conditions and the following disclaimer.
  #     * Redistributions in binary form must reproduce the above
  # copyright notice, this list of conditions and the following disclaimer
  # in the documentation and/or other materials provided with the
  # distribution.
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  # contributors may be used to endorse or promote products derived from
  # this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  """The Python implementation of the GRPC helloworld.Greeter server."""
  
  from concurrent import futures
  import time
  
  import grpc
  
  import helloworld_pb2
  import helloworld_pb2_grpc
  
  _ONE_DAY_IN_SECONDS = 60 * 60 * 24
  
  
  class Greeter(helloworld_pb2_grpc.GreeterServicer):
      def SayHello(self, request, context):
          return helloworld_pb2.HelloReply(message='Hello, %s!' % request.name)
  
  
  def serve():
      server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
      helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
      server.add_insecure_port('[::]:50051')
      server.start()
      try:
          while True:
              time.sleep(_ONE_DAY_IN_SECONDS)
      except KeyboardInterrupt:
          server.stop(0)
  
  
  if __name__ == '__main__':
      serve()
  