137 lines
4.1 KiB
Python
137 lines
4.1 KiB
Python
import logging
|
|
import threading
|
|
from datetime import datetime
|
|
from typing import Optional, TypeVar
|
|
|
|
from reactivex import abc, typing
|
|
from reactivex.disposable import Disposable
|
|
from reactivex.internal.concurrency import default_thread_factory
|
|
|
|
from .eventloopscheduler import EventLoopScheduler
|
|
from .periodicscheduler import PeriodicScheduler
|
|
|
|
_TState = TypeVar("_TState")
|
|
|
|
log = logging.getLogger("Rx")
|
|
|
|
|
|
class NewThreadScheduler(PeriodicScheduler):
|
|
"""Creates an object that schedules each unit of work on a separate thread."""
|
|
|
|
def __init__(
|
|
self, thread_factory: Optional[typing.StartableFactory] = None
|
|
) -> None:
|
|
super().__init__()
|
|
self.thread_factory: typing.StartableFactory = (
|
|
thread_factory or default_thread_factory
|
|
)
|
|
|
|
def schedule(
|
|
self, action: typing.ScheduledAction[_TState], state: Optional[_TState] = None
|
|
) -> abc.DisposableBase:
|
|
"""Schedules an action to be executed.
|
|
|
|
Args:
|
|
action: Action to be executed.
|
|
state: [Optional] state to be given to the action function.
|
|
|
|
Returns:
|
|
The disposable object used to cancel the scheduled action
|
|
(best effort).
|
|
"""
|
|
|
|
scheduler = EventLoopScheduler(
|
|
thread_factory=self.thread_factory, exit_if_empty=True
|
|
)
|
|
return scheduler.schedule(action, state)
|
|
|
|
def schedule_relative(
|
|
self,
|
|
duetime: typing.RelativeTime,
|
|
action: typing.ScheduledAction[_TState],
|
|
state: Optional[_TState] = None,
|
|
) -> abc.DisposableBase:
|
|
"""Schedules an action to be executed after duetime.
|
|
|
|
Args:
|
|
duetime: Relative time after which to execute the action.
|
|
action: Action to be executed.
|
|
state: [Optional] state to be given to the action function.
|
|
|
|
Returns:
|
|
The disposable object used to cancel the scheduled action
|
|
(best effort).
|
|
"""
|
|
|
|
scheduler = EventLoopScheduler(
|
|
thread_factory=self.thread_factory, exit_if_empty=True
|
|
)
|
|
return scheduler.schedule_relative(duetime, action, state)
|
|
|
|
def schedule_absolute(
|
|
self,
|
|
duetime: typing.AbsoluteTime,
|
|
action: typing.ScheduledAction[_TState],
|
|
state: Optional[_TState] = None,
|
|
) -> abc.DisposableBase:
|
|
"""Schedules an action to be executed at duetime.
|
|
|
|
Args:
|
|
duetime: Absolute time at which to execute the action.
|
|
action: Action to be executed.
|
|
state: [Optional] state to be given to the action function.
|
|
|
|
Returns:
|
|
The disposable object used to cancel the scheduled action
|
|
(best effort).
|
|
"""
|
|
|
|
dt = self.to_datetime(duetime)
|
|
return self.schedule_relative(dt - self.now, action, state=state)
|
|
|
|
def schedule_periodic(
|
|
self,
|
|
period: typing.RelativeTime,
|
|
action: typing.ScheduledPeriodicAction[_TState],
|
|
state: Optional[_TState] = None,
|
|
) -> abc.DisposableBase:
|
|
"""Schedules a periodic piece of work.
|
|
|
|
Args:
|
|
period: Period in seconds or timedelta for running the
|
|
work periodically.
|
|
action: Action to be executed.
|
|
state: [Optional] Initial state passed to the action upon
|
|
the first iteration.
|
|
|
|
Returns:
|
|
The disposable object used to cancel the scheduled
|
|
recurring action (best effort).
|
|
"""
|
|
|
|
seconds: float = self.to_seconds(period)
|
|
timeout: float = seconds
|
|
disposed: threading.Event = threading.Event()
|
|
|
|
def run() -> None:
|
|
nonlocal state, timeout
|
|
while True:
|
|
if timeout > 0.0:
|
|
disposed.wait(timeout)
|
|
if disposed.is_set():
|
|
return
|
|
|
|
time: datetime = self.now
|
|
|
|
state = action(state)
|
|
|
|
timeout = seconds - (self.now - time).total_seconds()
|
|
|
|
thread = self.thread_factory(run)
|
|
thread.start()
|
|
|
|
def dispose() -> None:
|
|
disposed.set()
|
|
|
|
return Disposable(dispose)
|