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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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57 lines
1.8 KiB
57 lines
1.8 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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"""gRPC Python helloworld.Greeter client with health checking.""" |
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import logging |
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from time import sleep |
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import grpc |
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from grpc_health.v1 import health_pb2 |
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from grpc_health.v1 import health_pb2_grpc |
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import helloworld_pb2 |
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import helloworld_pb2_grpc |
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def unary_call(stub: helloworld_pb2_grpc.GreeterStub, message: str): |
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response = stub.SayHello( |
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helloworld_pb2.HelloRequest(name=message), timeout=3 |
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) |
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print(f"Greeter client received: {response.message}") |
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def health_check_call(stub: health_pb2_grpc.HealthStub): |
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request = health_pb2.HealthCheckRequest(service="helloworld.Greeter") |
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resp = stub.Check(request) |
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if resp.status == health_pb2.HealthCheckResponse.SERVING: |
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print("server is serving") |
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elif resp.status == health_pb2.HealthCheckResponse.NOT_SERVING: |
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print("server stopped serving") |
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def run(): |
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with grpc.insecure_channel("localhost:50051") as channel: |
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stub = helloworld_pb2_grpc.GreeterStub(channel) |
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health_stub = health_pb2_grpc.HealthStub(channel) |
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# Should succeed |
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unary_call(stub, "you") |
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# Check health status every 1 second for 30 seconds |
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for _ in range(30): |
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health_check_call(health_stub) |
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sleep(1) |
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if __name__ == "__main__": |
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logging.basicConfig() |
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run()
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