mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-15 01:15:05 +00:00
350 lines
12 KiB
Python
350 lines
12 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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import copy
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import datetime
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import threading
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from . import db, logger
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from exceptions_helper import ex
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from six import integer_types
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# noinspection PyUnreachableCode
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if False:
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from typing import AnyStr, Callable, Dict, List, Optional, Tuple, Union
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from .search_queue import BaseSearchQueueItem
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from .show_queue import ShowQueueItem
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from .people_queue import CastQueueItem
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class QueuePriorities(object):
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LOW = 10
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NORMAL = 20
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HIGH = 30
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VERYHIGH = 40
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class GenericQueue(object):
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def __init__(self, cache_db_tables=None, main_db_tables=None):
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# type: (List[AnyStr], List[AnyStr]) -> None
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self.currentItem = None # type: QueueItem or None
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self.queue = [] # type: List[Union[QueueItem, BaseSearchQueueItem, ShowQueueItem]]
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self.queue_name = 'QUEUE' # type: AnyStr
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self.min_priority = 0 # type: int
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self.events = {} # type: Dict[int, List[Callable]]
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self.lock = threading.RLock()
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self.cache_db_tables = cache_db_tables or [] # type: List[AnyStr]
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self.main_db_tables = main_db_tables or [] # type: List[AnyStr]
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self._id_counter = self._load_init_id() # type: integer_types
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def _load_init_id(self):
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# type: (...) -> integer_types
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"""
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fetch highest uid for queue type to initialize the class
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"""
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my_db = db.DBConnection('cache.db')
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cr = my_db.mass_action([['SELECT max(uid) as max_id FROM %s' % t] for t in self.cache_db_tables])
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my_db = db.DBConnection()
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mr = my_db.mass_action([['SELECT max(uid) as max_id FROM %s' % t] for t in self.main_db_tables])
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return max([c[0]['max_id'] or 0 for c in cr] + [s[0]['max_id'] or 0 for s in mr] + [0])
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def _get_new_id(self):
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# type: (...) -> integer_types
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self._id_counter += 1
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return self._id_counter
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def load_queue(self):
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pass
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def save_queue(self):
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cl = self._clear_sql()
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try:
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with self.lock:
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for item in ((self.currentItem and [self.currentItem]) or []) + self.queue:
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cl.extend(self._get_item_sql(item))
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if cl:
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my_db = db.DBConnection('cache.db')
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my_db.mass_action(cl)
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except (BaseException, Exception) as e:
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logger.error('Exception saving queue %s to db: %s' % (self.__class__.__name__, ex(e)))
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def _clear_sql(self):
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# type: (...) -> List[List]
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return []
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def save_item(self, item):
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try:
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if item:
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item_sql = self._get_item_sql(item)
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if item_sql:
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my_db = db.DBConnection('cache.db')
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my_db.mass_action(item_sql)
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except (BaseException, Exception) as e:
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logger.error('Exception saving item %s to db: %s' % (item, ex(e)))
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def delete_item(self, item, finished_run=False):
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# type: (Union[QueueItem, CastQueueItem], bool) -> None
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"""
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:param item:
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:param finished_run: set to True when queue item has run
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"""
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if item:
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try:
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item_sql = self._delete_item_from_db_sql(item)
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if item_sql:
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my_db = db.DBConnection('cache.db')
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my_db.mass_action(item_sql)
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except (BaseException, Exception) as e:
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logger.error('Exception deleting item %s from db: %s' % (item, ex(e)))
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def _get_item_sql(self, item):
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# type: (Union[QueueItem, CastQueueItem]) -> List[List]
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return []
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def _delete_item_from_db_sql(self, item):
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# type: (Union[QueueItem, CastQueueItem]) -> List[List]
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pass
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def remove_from_queue(self, to_remove=None, force=False):
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# type: (List[AnyStr], bool) -> None
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"""
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remove given uid items from queue
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:param to_remove: list of uids to remove from queue
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:param force: force removal from db
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"""
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self._remove_from_queue(to_remove=to_remove, excluded_types=[], force=force)
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def _remove_from_queue(self, to_remove=None, excluded_types=None, force=False):
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# type: (List[AnyStr], List, bool) -> None
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"""
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remove given uid items from queue
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:param to_remove: list of uids to remove from queue
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:param force: force removal from db
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"""
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if to_remove:
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excluded_types = excluded_types or []
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with self.lock:
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if not force:
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to_remove = [r for r in to_remove for q in self.queue
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if r == q.uid and (q.action_id not in excluded_types)]
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del_sql = [
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['DELETE FROM %s WHERE uid IN (%s)' % (t, ','.join(['?'] * len(to_remove))), to_remove]
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for t in self.cache_db_tables
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]
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del_main_sql = [
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['DELETE FROM %s WHERE uid IN (%s)' % (t, ','.join(['?'] * len(to_remove))), to_remove]
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for t in self.main_db_tables
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]
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self.queue = [q for q in self.queue if q.uid not in to_remove]
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if del_sql:
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my_db = db.DBConnection('cache.db')
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my_db.mass_action(del_sql)
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if del_main_sql:
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my_db = db.DBConnection()
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my_db.mass_action(del_main_sql)
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def clear_queue(self, action_types=None):
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# type: (integer_types) -> None
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"""
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clear queue excluding internal defined types
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:param action_types: only clear supplied action types
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"""
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if not isinstance(action_types, list):
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action_types = [action_types]
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return self._clear_queue(action_types=action_types)
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def _clear_queue(self, action_types=None, excluded_types=None):
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# type: (List[integer_types], List) -> None
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excluded_types = excluded_types or []
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with self.lock:
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if action_types:
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self.queue = [q for q in self.queue if q.action_id in excluded_types or q.action_id not in action_types]
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del_sql = [
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['DELETE FROM %s WHERE action_id IN (%s)' % (t, ','.join(['?'] * len(action_types))), action_types]
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for t in self.cache_db_tables
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]
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del_main_sql = [
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['DELETE FROM %s WHERE action_id IN (%s)' % (t, ','.join(['?'] * len(action_types))), action_types]
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for t in self.main_db_tables
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]
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else:
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self.queue = [q for q in self.queue if q.action_id in excluded_types]
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del_sql = [
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['DELETE FROM %s' % t] for t in self.cache_db_tables
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]
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del_main_sql = [
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['DELETE FROM %s' % t] for t in self.main_db_tables
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]
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if del_sql:
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my_db = db.DBConnection('cache.db')
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my_db.mass_action(del_sql)
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if del_main_sql:
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my_db = db.DBConnection()
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my_db.mass_action(del_main_sql)
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def pause(self):
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logger.log('Pausing queue')
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if self.lock:
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self.min_priority = 999999999999
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def unpause(self):
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logger.log('Unpausing queue')
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with self.lock:
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self.min_priority = 0
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def add_item(self, item, add_to_db=True):
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"""
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:param item: Queue Item
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:type item: QueueItem
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:param add_to_db: add to db
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:return: Queue Item
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:rtype: QueueItem
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"""
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with self.lock:
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item.added = datetime.datetime.now()
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item.uid = item.uid or self._get_new_id()
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self.queue.append(item)
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if add_to_db:
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self.save_item(item)
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return item
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def check_events(self):
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pass
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def add_event(self, event_type, method):
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# type: (int, Callable) -> None
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if isinstance(event_type, integer_types) and callable(method):
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if event_type not in self.events:
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self.events[event_type] = []
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if method not in self.events[event_type]:
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self.events[event_type].append(method)
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def remove_event(self, event_type, method):
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# type: (int, Callable) -> None
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if isinstance(event_type, integer_types) and callable(method):
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if event_type in self.events and method in self.events[event_type]:
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try:
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self.events[event_type].remove(method)
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if 0 == len(self.events[event_type]):
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del self.events[event_type]
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except (BaseException, Exception) as e:
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logger.error('Error removing event method from queue: %s' % ex(e))
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def execute_events(self, event_type, *args, **kwargs):
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# type: (int, Tuple, Dict) -> None
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if event_type in self.events:
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for event in self.events.get(event_type):
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try:
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event(*args, **kwargs)
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except (BaseException, Exception) as e:
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logger.error('Error executing Event: %s' % ex(e))
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def run(self):
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# only start a new task if one isn't already going
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with self.lock:
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if None is self.currentItem or not self.currentItem.is_alive():
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# if the thread is dead then the current item should be finished
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if self.currentItem:
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self.currentItem.finish()
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try:
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self.delete_item(self.currentItem, finished_run=True)
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except (BaseException, Exception):
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pass
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self.currentItem = None
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# if there's something in the queue then run it in a thread and take it out of the queue
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if 0 < len(self.queue):
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self.queue.sort(key=lambda y: (-y.priority, y.added))
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if self.queue[0].priority < self.min_priority:
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return
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# launch the queue item in a thread
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self.currentItem = self.queue.pop(0)
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if 'SEARCHQUEUE' != self.queue_name:
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self.currentItem.name = self.queue_name + '-' + self.currentItem.name
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self.currentItem.start()
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self.check_events()
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class QueueItem(threading.Thread):
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def __init__(self, name, action_id=0, uid=None):
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# type: (AnyStr, int, integer_types) -> None
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"""
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:param name: name
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:param action_id:
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:param uid:
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"""
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super(QueueItem, self).__init__()
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self.name = name.replace(' ', '-').upper() # type: AnyStr
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self.inProgress = False # type: bool
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self.priority = QueuePriorities.NORMAL # type: int
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self.action_id = action_id # type: int
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self.stop = threading.Event()
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self.added = None # type: Optional[datetime.datetime]
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self.uid = uid # type: integer_types
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def copy(self, deepcopy_obj=None):
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"""
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:param deepcopy_obj: List of properties to be deep copied
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:type deepcopy_obj: List
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:return: a shallow copy of QueueItem with optional deepcopy of in deepcopy_obj listed objects
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:rtype: QueueItem
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"""
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cls = self.__class__
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result = cls.__new__(cls)
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result.__dict__.update(self.__dict__)
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if deepcopy_obj:
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for o in deepcopy_obj:
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if self.__dict__.get(o):
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new_seg = copy.deepcopy(self.__dict__.get(o))
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result.__dict__[o] = new_seg
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return result
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def run(self):
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"""Implementing classes should call this"""
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self.inProgress = True
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def finish(self):
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"""Implementing Classes should call this"""
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self.inProgress = False
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threading.current_thread().name = self.name
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