Communicating with a running python daemon

Question

I wrote a small Python application that runs as a daemon. It utilizes threading and queues.

I\'m looking for general approaches to altering this application so that

Answer 1

You can do this using multiprocessing managers (https://docs.python.org/3/library/multiprocessing.html#managers):

Managers provide a way to create data which can be shared between different processes, including sharing over a network between processes running on different machines. A manager object controls a server process which manages shared objects. Other processes can access the shared objects by using proxies.

Example server:

from multiprocessing.managers import BaseManager

class RemoteOperations:
    def add(self, a, b):
        print('adding in server process!')
        return a + b

    def multiply(self, a, b):
        print('multiplying in server process!')
        return a * b

class RemoteManager(BaseManager):
    pass

RemoteManager.register('RemoteOperations', RemoteOperations)

manager = RemoteManager(address=('', 12345), authkey=b'secret')
manager.get_server().serve_forever()

Example client:

from multiprocessing.managers import BaseManager

class RemoteManager(BaseManager):
    pass

RemoteManager.register('RemoteOperations')
manager = RemoteManager(address=('localhost', 12345), authkey=b'secret')
manager.connect()

remoteops = manager.RemoteOperations()
print(remoteops.add(2, 3))
print(remoteops.multiply(2, 3))