mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-15 01:15:05 +00:00
141 lines
5 KiB
Python
141 lines
5 KiB
Python
#
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# This file is part of SickGear.
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#
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# SickGear is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# SickGear is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with SickGear. If not, see <http://www.gnu.org/licenses/>.
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from __future__ import division
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import datetime
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import time
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import threading
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import traceback
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from . import logger
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from exceptions_helper import ex
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class Scheduler(threading.Thread):
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def __init__(self, action, cycle_time=datetime.timedelta(minutes=10), run_delay=datetime.timedelta(minutes=0),
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start_time=None, thread_name="ScheduledThread", silent=True, prevent_cycle_run=None, paused=False):
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super(Scheduler, self).__init__()
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self.last_run = datetime.datetime.now() + run_delay - cycle_time
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self.action = action
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self.cycle_time = cycle_time
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self.start_time = start_time
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self.prevent_cycle_run = prevent_cycle_run
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self.name = thread_name
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self.silent = silent
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self._stopper = threading.Event()
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self._unpause = threading.Event()
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if not paused:
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self._unpause.set()
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self.lock = threading.Lock()
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self.force = False
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def pause(self):
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self._unpause.clear()
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def unpause(self):
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self._unpause.set()
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def stopit(self):
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""" Stop the thread's activity.
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"""
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self._stopper.set()
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self.unpause()
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def set_paused_state(self):
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if hasattr(self.action, 'is_enabled'):
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self.silent = not self.action.is_enabled()
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if self.silent:
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self.pause()
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else:
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self.unpause()
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def time_left(self):
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return self.cycle_time - (datetime.datetime.now() - self.last_run)
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def force_run(self):
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if not self.action.amActive:
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self.force = True
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return True
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return False
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def run(self):
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self.set_paused_state()
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# load previously saved queue
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try:
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if getattr(self.action, 'load_queue', None):
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self.action.load_queue()
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except (BaseException, Exception):
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pass
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# if self._unpause Event() is NOT set the loop pauses
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while self._unpause.wait() and not self._stopper.is_set():
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if getattr(self.action, 'is_enabled', True):
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try:
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current_time = datetime.datetime.now()
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should_run = False
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# check if interval has passed
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if current_time - self.last_run >= self.cycle_time:
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# check if wanting to start around certain time taking interval into account
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if self.start_time:
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hour_diff = current_time.time().hour - self.start_time.hour
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if not hour_diff < 0 and hour_diff < self.cycle_time.seconds // 3600:
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should_run = True
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else:
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# set last_run to only check start_time after another cycle_time
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self.last_run = current_time
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else:
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should_run = True
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if self.force:
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should_run = True
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if should_run and ((self.prevent_cycle_run is not None and self.prevent_cycle_run()) or
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getattr(self.action, 'prevent_run', False)):
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logger.warning(f'{self.name} skipping this cycle_time')
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# set last_run to only check start_time after another cycle_time
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self.last_run = current_time
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should_run = False
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if should_run:
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self.last_run = current_time
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try:
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if not self.silent:
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logger.debug(f'Starting new thread: {self.name}')
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self.action.run()
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except (BaseException, Exception) as e:
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logger.error(f'Exception generated in thread {self.name}: {ex(e)}')
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logger.error(repr(traceback.format_exc()))
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finally:
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if self.force:
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self.force = False
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else:
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# disabled schedulers will only be rechecked every 30 seconds until enabled
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time.sleep(30)
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time.sleep(1)
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# exiting thread
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self._stopper.clear()
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self._unpause.clear()
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