mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-28 20:39:59 +00:00
85 lines
3.2 KiB
Python
85 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
|
|
# Copyright (C) 2020 mmonkey
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import atexit
|
|
|
|
from .. import logger
|
|
from .worker import WorkerThread
|
|
|
|
try:
|
|
from apscheduler.schedulers.background import BackgroundScheduler as BScheduler
|
|
use_APScheduler = True
|
|
except (ImportError, RuntimeError) as e:
|
|
use_APScheduler = False
|
|
log = logger.create()
|
|
log.info('APScheduler not found. Unable to schedule tasks.')
|
|
|
|
|
|
class BackgroundScheduler:
|
|
_instance = None
|
|
|
|
def __new__(cls):
|
|
if not use_APScheduler:
|
|
return False
|
|
|
|
if cls._instance is None:
|
|
cls._instance = super(BackgroundScheduler, cls).__new__(cls)
|
|
cls.log = logger.create()
|
|
cls.scheduler = BScheduler()
|
|
cls.scheduler.start()
|
|
|
|
atexit.register(lambda: cls.scheduler.shutdown())
|
|
|
|
return cls._instance
|
|
|
|
def schedule(self, func, trigger, name=None, **trigger_args):
|
|
if use_APScheduler:
|
|
return self.scheduler.add_job(func=func, trigger=trigger, name=name, **trigger_args)
|
|
|
|
# Expects a lambda expression for the task
|
|
def schedule_task(self, task, user=None, name=None, hidden=False, trigger='cron', **trigger_args):
|
|
if use_APScheduler:
|
|
def scheduled_task():
|
|
worker_task = task()
|
|
worker_task.scheduled = True
|
|
WorkerThread.add(user, worker_task, hidden=hidden)
|
|
return self.schedule(func=scheduled_task, trigger=trigger, name=name, **trigger_args)
|
|
|
|
# Expects a list of lambda expressions for the tasks
|
|
def schedule_tasks(self, tasks, user=None, trigger='cron', **trigger_args):
|
|
if use_APScheduler:
|
|
for task in tasks:
|
|
self.schedule_task(task[0], user=user, trigger=trigger, name=task[1], hidden=task[2], **trigger_args)
|
|
|
|
# Expects a lambda expression for the task
|
|
def schedule_task_immediately(self, task, user=None, name=None, hidden=False):
|
|
if use_APScheduler:
|
|
def immediate_task():
|
|
WorkerThread.add(user, task(), hidden)
|
|
return self.schedule(func=immediate_task, trigger='date', name=name)
|
|
|
|
# Expects a list of lambda expressions for the tasks
|
|
def schedule_tasks_immediately(self, tasks, user=None):
|
|
if use_APScheduler:
|
|
for task in tasks:
|
|
self.schedule_task_immediately(task[0], user, name="immediately " + task[1], hidden=task[2])
|
|
|
|
# Remove all jobs
|
|
def remove_all_jobs(self):
|
|
self.scheduler.remove_all_jobs()
|