generated from daniil-berg/boilerplate-py
some convenience methods; minor renaming
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3eae7d803f
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@ -22,22 +22,33 @@ class BaseTaskPool:
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cls._pools.append(pool)
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return len(cls._pools) - 1
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def __init__(self, max_size: int = inf, name: str = None) -> None:
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self._max_size: int = max_size # TODO: Make use of a synchronization primitive for this to work
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# TODO: Make use of `max_running`
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def __init__(self, max_running: int = inf, name: str = None) -> None:
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self._max_running: int = max_running
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self._open: bool = True
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self._counter: int = 0
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self._running: Dict[int, Task] = {}
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self._cancelled: Dict[int, Task] = {}
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self._ended: Dict[int, Task] = {}
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self._all_tasks_known: Event = Event()
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self._all_tasks_known.set()
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self._idx: int = self._add_pool(self)
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self._name: str = name
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self._all_tasks_known_flag: Event = Event()
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self._all_tasks_known_flag.set()
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self._more_allowed_flag: Event = Event()
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self._check_more_allowed()
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log.debug("%s initialized", str(self))
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def __str__(self) -> str:
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return f'{self.__class__.__name__}-{self._name or self._idx}'
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@property
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def max_running(self) -> int:
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return self._max_running
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@property
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def is_open(self) -> bool:
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return self._open
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@property
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def num_running(self) -> int:
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return len(self._running)
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@ -54,6 +65,16 @@ class BaseTaskPool:
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def num_finished(self) -> int:
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return self.num_ended - self.num_cancelled
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@property
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def is_full(self) -> bool:
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return not self._more_allowed_flag.is_set()
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def _check_more_allowed(self) -> None:
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if self.is_full and self.num_running < self.max_running:
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self._more_allowed_flag.set()
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elif not self.is_full and self.num_running >= self.max_running:
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self._more_allowed_flag.clear()
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def _task_name(self, task_id: int) -> str:
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return f'{self}_Task-{task_id}'
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@ -71,6 +92,7 @@ class BaseTaskPool:
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task = self._cancelled[task_id]
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self._ended[task_id] = task
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await _execute_function(custom_callback, args=(task_id, ))
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self._check_more_allowed()
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log.info("Ended %s", self._task_name(task_id))
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async def _task_wrapper(self, awaitable: Awaitable, task_id: int, final_callback: FinalCallbackT = None,
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@ -93,6 +115,7 @@ class BaseTaskPool:
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self._task_wrapper(awaitable, task_id, final_callback, cancel_callback),
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name=self._task_name(task_id)
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)
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self._check_more_allowed()
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return task_id
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def _cancel_one(self, task_id: int, msg: str = None) -> None:
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@ -121,7 +144,7 @@ class BaseTaskPool:
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async def gather(self, return_exceptions: bool = False):
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if self._open:
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raise exceptions.PoolStillOpen("Pool must be closed, before tasks can be gathered")
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await self._all_tasks_known.wait()
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await self._all_tasks_known_flag.wait()
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results = await gather(*self._running.values(), *self._ended.values(), return_exceptions=return_exceptions)
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self._running = self._cancelled = self._ended = {}
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return results
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@ -155,14 +178,14 @@ class TaskPool(BaseTaskPool):
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def _map(self, func: CoroutineFunc, args_iter: ArgsT, arg_stars: int = 0, num_tasks: int = 1,
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final_callback: FinalCallbackT = None, cancel_callback: CancelCallbackT = None) -> None:
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if self._all_tasks_known.is_set():
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self._all_tasks_known.clear()
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if self._all_tasks_known_flag.is_set():
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self._all_tasks_known_flag.clear()
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args_iter = iter(args_iter)
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def _start_next_coroutine() -> bool:
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cor = self._get_next_coroutine(func, args_iter, arg_stars)
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if cor is None:
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self._all_tasks_known.set()
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self._all_tasks_known_flag.set()
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return True
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self._start_task(cor, ignore_closed=True, final_callback=_start_next, cancel_callback=cancel_callback)
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return False
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