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moonstone/vanilla_first_setup/utils/run_async.py

72 lines
2.2 KiB
Python

# run_async.py
#
# Copyright 2022 brombinmirko <send@mirko.pm>
#
# 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, in version 3 of the License.
#
# 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 os
import sys
import threading
import traceback
import logging
from gi.repository import GLib
logger = logging.getLogger("FirstSetup::Async")
class RunAsync(threading.Thread):
"""
This class is used to execute a function asynchronously.
It takes a function, a callback and a list of arguments as input.
"""
def __init__(self, task_func, callback=None, *args, **kwargs):
if "DEBUG_MODE" in os.environ:
import faulthandler
faulthandler.enable()
self.source_id = None
assert threading.current_thread() is threading.main_thread()
super(RunAsync, self).__init__(
target=self.__target, args=args, kwargs=kwargs)
self.task_func = task_func
self.callback = callback if callback else lambda r, e: None
self.daemon = kwargs.pop("daemon", True)
self.start()
def __target(self, *args, **kwargs):
result = None
error = None
logger.debug(f"Running async job [{self.task_func}].")
try:
result = self.task_func(*args, **kwargs)
except Exception as exception:
logger.error("Error while running async job: "
f"{self.task_func}\nException: {exception}")
error = exception
_ex_type, _ex_value, trace = sys.exc_info()
traceback.print_tb(trace)
traceback_info = '\n'.join(traceback.format_tb(trace))
self.source_id = GLib.idle_add(self.callback, result, error)
return self.source_id