baseimage-tutorial-framework/lib/tfw/mixins/monitor_manager_mixin.py

# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
# All Rights Reserved. See LICENSE file for details.

import logging

LOG = logging.getLogger(__name__)


class MonitorManagerMixin:
    def __init__(self, monitor_type, *monitor_args):
        self._monitor_type = monitor_type
        self._monitor = None
        self.monitor_args = monitor_args
        self.reload_monitor()

    @property
    def monitor(self):
        return self._monitor

    def set_monitor_args(self, *monitor_args):
        self.monitor_args = monitor_args

    def reload_monitor(self):
        if self._monitor:
            try:
                self._monitor.stop()
            except KeyError:
                LOG.debug('Working directory was removed – ignoring...')
        self._monitor = self._monitor_type(*self.monitor_args)
        self._monitor.watch()   # This runs on a separate thread