class ProcessPlayer(object):
"""Starts a process, and sets Checkpoints in its lifecycle"""
def __init__(self, callable_, name="nameless", *args_for_callable, **kwargs_for_callable):
"""
:param callable_:
:param str name: The name of this :class:`ProcessStarter`
:param args_for_callable:
:param kwargs_for_callable:
:return:
"""
self.name = name
self.music_sheet = None
self._terminal_checkpoint = ImplicitCheckpoint(self, None)
self._initial_checkpoint = ImplicitCheckpoint(self, None, before=True)
self.instrument = InstrumentedThread(
target=callable_, args=args_for_callable, kwargs=kwargs_for_callable)
def add_checkpoint_after(self, callable_, name=None):
"""Create and return a checkpoint, set AFTER the callable returns"""
return Checkpoint(self, callable_, name=name)
def add_checkpoint_before(self, callable_, name=None):
"""Create and return a checkpoint, set BEFORE the callable returns"""
return Checkpoint(self, callable_, before=True, name=name)
def get_terminal_checkpoint(self):
"""Returns a checkpoint that marks the process end"""
return self._terminal_checkpoint
def get_initial_checkpoint(self):
"""Return the initial checkpoint, that marks the process beginning"""
return self._initial_checkpoint
def play(self, player_checkpoints, baton):
self.music_sheet = player_checkpoints
self.instrument.tune(baton, player_checkpoints)
self.instrument.start()
def __repr__(self):
return u"<Player {}>".format(self.name)
__str__ = __repr__
def __init__(self, callable_, name="nameless", *args_for_callable, **kwargs_for_callable):
"""
:param callable_:
:param str name: The name of this :class:`ProcessStarter`
:param args_for_callable:
:param kwargs_for_callable:
:return:
"""
self.name = name
self.music_sheet = None
self._terminal_checkpoint = ImplicitCheckpoint(self, None)
self._initial_checkpoint = ImplicitCheckpoint(self, None, before=True)
self.instrument = InstrumentedThread(
target=callable_, args=args_for_callable, kwargs=kwargs_for_callable)
