example twistd service

count_server.py

from twisted.protocols.amp import AMP
from twisted.internet import reactor
from twisted.internet.protocol import Factory
from twisted.internet.endpoints import TCP4ServerEndpoint
from twisted.application.service import Application
from twisted.application.internet import StreamServerEndpointService

class Count(amp.Command):
    arguments = [('n', amp.Integer())]
    response = [('ok', amp.Boolean())]

class Counter(amp.AMP):
    @Count.responder
    def count(self, n):
        print 'received:', n
        n += 1

        if n < 10:
            print 'sending:', n
            self.callRemote(Count, n=n)

        return {'ok': True}

# twistd -n -y count_server.py                                                                                                                                                                                                                

application = Application('test AMP server')

endpoint = TCP4ServerEndpoint(reactor, 8750)
factory = Factory()
factory.protocol = Counter
service = StreamServerEndpointService(endpoint, factory)
service.setServiceParent(application)