Change exception classes to include stanza error. Change name of exception base class to Error. Change backend error map to have a tuple as value: stanza-error, pubsub-error. Remove empty componentConnected() definition in Service. Move registering of notification from __init__ to componentConnected in ComponentServiceFromNotificationService. Add observers for subscribe, options and configure.

from twisted.application import internet, service
from twisted.internet import interfaces
from twisted.python import usage
import idavoll

class Options(usage.Options):
	optParameters = [
		('jid', None, 'pubsub'),
		('secret', None, None),
		('rhost', None, '127.0.0.1'),
		('rport', None, '6000')
	]

def makeService(config):
	return idavoll.makeService(config)