# Copyright (C) 2006-2014 Bastian Kleineidam
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import _thread
from ..decorators import notimplemented
from .. import threader
from . import console
[docs]
class CheckedTask(threader.StoppableThread):
"""Stoppable URL check task, handling error conditions while running."""
[docs]
def run(self):
"""Handle keyboard interrupt and other errors."""
try:
self.run_checked()
except KeyboardInterrupt:
_thread.interrupt_main()
except Exception:
self.internal_error()
[docs]
@notimplemented
def run_checked(self):
"""Overload in subclass."""
pass
[docs]
@notimplemented
def internal_error(self):
"""Overload in subclass."""
pass
[docs]
class LoggedCheckedTask(CheckedTask):
"""URL check task with a logger instance and internal error handling."""
def __init__(self, logger):
"""Initialize super instance and store given logger."""
super().__init__()
self.logger = logger
[docs]
def internal_error(self):
"""Log an internal error on console and the logger."""
console.internal_error()
self.logger.log_internal_error()