class Trail:
IDLE = 'idle'
REGISTERED = 'registered'
HOLD = 'hold'
ACTIVE = 'active'
def __init__(self, path=None):
self.path = path
self.store = Store()
self._fsm = Fysom(
initial=Trail.IDLE,
events=[
('register', Trail.IDLE, Trail.REGISTERED),
('prepare', Trail.REGISTERED, Trail.HOLD),
('activate', Trail.HOLD, Trail.ACTIVE),
('resolve', Trail.ACTIVE, Trail.IDLE),
('resolve', Trail.HOLD, Trail.IDLE),
('resolve', Trail.REGISTERED, Trail.IDLE)],
callbacks=[
('onbeforeregister', self._onbeforeregister),
('onregistered', self._registered),
('onidle', self._onidle)])
@property
def status(self):
return self._fsm.current
def onchangestate(self, on_change):
self._fsm.onchangestate = on_change
def register(self):
self._fsm.register()
def prepare(self):
self._fsm.prepare()
def activate(self):
self._fsm.activate()
def resolve(self):
self._fsm.resolve()
def _onbeforeregister(self, e):
self.store.register(self.path)
def _registered(self, e):
self.prepare()
def _onidle(self, e):
if e.src is not "none":
self.store.unregister(self.path)
class BaseExitSection(object):
def __init__(self):
self._can_depart = False
self._fsm = Fysom(
initial=Section.IDLE,
final=Section.IDLE,
events=[
('wait', Section.IDLE, Section.WAITING),
('depart', Section.IDLE, Section.DEPARTING),
('depart', Section.WAITING, Section.DEPARTING),
('resolve', Section.DEPARTING, Section.IDLE)],
callbacks=[
('onbeforedepart', self._onbeforedepart),
('ondepart', self.__ondepart__)])
@property
def status(self):
return self._fsm.current
@property
def can_depart(self):
return self._can_depart
def request_depart(self):
try:
self._fsm.depart()
except Canceled:
self._fsm.wait()
def depart(self):
self._can_depart = True
if self.status == Section.WAITING:
self._fsm.depart()
def departed(self):
self._fsm.resolve()
def _onbeforedepart(self, e):
return self.can_depart
def __ondepart__(self, e):
self._can_depart = False
self._ondepart(e)
def _ondepart(self, e):
pass