private methods

Both callbacks and fetchers can contain private methods that do not behave as remote callbacks or serve as pointers on remote callbacks (in the case of fetchers). To create such methods, users have two options:

1. They can add a leading underscore to the method name.
2. They can mark the method as local using the local decorator.

calculator_service.py content:

import logging
from daffi import Global
from daffi.registry import Callback
from daffi.decorators import local

logging.basicConfig(level=logging.INFO)


class CalculatorService(Callback):
    auto_init = True

    def calculate_sum(self, num1, num2):
        return self.get_sum(num1, num2)

    @local
    def get_sum(self, num1, num2):
        return num1 + num2


if __name__ == '__main__':
    Global(init_controller=True, host="localhost", port=8888).join()

calculator_client.py content:

import logging
from daffi import Global
from daffi.registry import Fetcher, Args
from daffi.decorators import local

logging.basicConfig(level=logging.INFO)


class CalculatorClient(Fetcher):

    def calculate_sum(self, num1, num2):
        return self.create_args(num1, num2)

    @local
    def create_args(self, num1, num2):
        return Args(num1, num2)


if __name__ == '__main__':
    g = Global(host="localhost", port=8888)

    calc_client = CalculatorClient()
    result = calc_client.calculate_sum(1, 2)
    print(result)

    g.stop()

Execute in two separate terminals:

python3 calculator_service.py
python3 calculator_client.py

Note

To use UNIX socket instead of TCP for communication, you should remove the host and port parameters from the initialization of the Global object, and optionally include the unix_sock_path parameter.