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tiny grpc python example

Installation, configuration

start the server and make sure it uses configuration file:

inspiration from https://grpc.io/docs/tutorials/basic/python.html

proto files are available in: signal_server/apps/grpc_service/proto_files/

Setup

pip install grpcio-tools

to re-generate files (already generated in the generated folder)

python -m grpc_tools.protoc -I../../../apps/grpc_service/proto_files --python_out=./generated --grpc_python_out=./generated ../../../apps/grpc_service/proto_files/*

Run

modify localhost in the sample code to the ip where your server is running. run the simple_example.sh from your terminal.

python simple_example.sh

make sure you have can traffic running eg "cangen vcan0 -v -g 4" check root readme. Have patience.

Example of virtual network:

Publisher and Subscriber

This examples uses both virtual_example_pub.py and virtual_example_sub.py. By running them in separate terminals:

  • You can use virtual_example_pub.py to type numbers in the console and send them to the SignalBroker using grpc.
  • virtual_example_sub.py will subscribe to the SignalBroker and receive the stream of data. Every time you type a new number in the "Publisher" you will see the data received in the "Subscriber" side.

Run

  1. Make sure you have an interfaces.json file that contains "type": "virtual" in its "chains" array :
    "chains": [
      {
        "device_name": "virtual",
        "namespace": "VirtualInterface",
        "type": "virtual"
      }
    ],

The interfaces.json file that you can find in the config folder already has this included.

  1. Start the SignalBroker with this new configuration.
  2. Execute virtual_example_sub.py on a new terminal.
  3. In a different terminal, execute virtual_example_pub.py.
  4. Write numbers in the terminal where you execute virtual_example_pub.py.
  5. Watch those same numbers appear in the terminal where you execute virtual_example_sub.py