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71 lines
2.2 KiB
Python
71 lines
2.2 KiB
Python
2 years ago
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# run_async.py
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#
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# Copyright 2022 brombinmirko <send@mirko.pm>
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#
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# This program 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, in version 3 of the License.
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#
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# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import sys
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import threading
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import traceback
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import logging
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from gi.repository import GLib
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2 years ago
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logger = logging.getLogger("SugarCubes::Async")
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2 years ago
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class RunAsync(threading.Thread):
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"""
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This class is used to execute a function asynchronously.
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It takes a function, a callback and a list of arguments as input.
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"""
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def __init__(self, task_func, callback=None, *args, **kwargs):
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if "DEBUG_MODE" in os.environ:
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import faulthandler
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faulthandler.enable()
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self.source_id = None
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assert threading.current_thread() is threading.main_thread()
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super(RunAsync, self).__init__(target=self.__target, args=args, kwargs=kwargs)
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self.task_func = task_func
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self.callback = callback if callback else lambda r, e: None
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self.daemon = kwargs.pop("daemon", True)
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self.start()
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def __target(self, *args, **kwargs):
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result = None
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error = None
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logger.debug(f"Running async job [{self.task_func}].")
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try:
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result = self.task_func(*args, **kwargs)
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except Exception as exception:
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logger.error("Error while running async job: "
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f"{self.task_func}\nException: {exception}")
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error = exception
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_ex_type, _ex_value, trace = sys.exc_info()
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traceback.print_tb(trace)
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traceback_info = '\n'.join(traceback.format_tb(trace))
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self.source_id = GLib.idle_add(self.callback, result, error)
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return self.source_id
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