class ActorSystem(actors.internal.factory.ActorFactory):
def __init__(self, system_dispatcher=None):
"""
The actor system is responsible for creating, configuring and stopping actors and
dispatchers.
Normally, only one system per application should be created.
:param system_dispatcher: Override the dispatcher used by the system. This also acts as the
default dispatcher for new actors.
:type system_dispatcher: :class:`Dispatcher`
"""
self._system_dispatcher = Dispatcher(Executor()) \
if system_dispatcher is None else system_dispatcher
self._dead_letters = _DeadLetterRef()
self._terminate_promise = Promise()
class Guardian(Actor):
def __init__(me):
me._logger = logging.getLogger(__name__)
def receive(me, message):
me._logger.warning("User receive called. This should not be happen.")
def post_stop(me):
self._terminate_promise.complete(None)
self._guardian = InternalRef(actors.internal.cell.Cell(Guardian,
dispatcher=self._system_dispatcher, system=self, parent=None))
self._guardian.send_system_message(Start)
actors.internal.factory.ActorFactory.__init__(self, self, self._guardian)
def terminate(self):
self._guardian.send_system_message(Terminate)
self._terminate_promise.future.get()
@property
def dead_letters(self):
return self._dead_letters
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.terminate()
def actor_of(self, cls=None, behaviour=None, dispatcher=None):
if cls:
factory = cls
elif behaviour:
factory = _actor_from_behaviour(behaviour)
else:
raise ValueError()
if dispatcher is None:
dispatcher = self._system._system_dispatcher
from actors.internal.cell import Cell
cell = Cell(factory, dispatcher=dispatcher, system=self._system,
parent=self._supervisor)
internal_ref = InternalRef(cell)
self._supervisor.send_system_message(Supervise(internal_ref))
internal_ref.send_system_message(Start)
return ActorRef(cell)
def actor_of(self, cls=None, behaviour=None, dispatcher=None):
if cls:
factory = cls
elif behaviour:
factory = _actor_from_behaviour(behaviour)
else:
raise ValueError()
if dispatcher is None:
dispatcher = self._system._system_dispatcher
from actors.internal.cell import Cell
cell = Cell(factory,
dispatcher=dispatcher,
system=self._system,
parent=self._supervisor)
internal_ref = InternalRef(cell)
self._supervisor.send_system_message(Supervise(internal_ref))
internal_ref.send_system_message(Start)
return ActorRef(cell)
