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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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from __future__ import annotations

import os
import signal
import time

from airflow.sdk.bases.operator import BaseOperator
from airflow.sdk.definitions.dag import dag


class SignalForwardOperator(BaseOperator):
    """Send SIGTERM to the supervisor parent process to exercise signal forwarding."""

    def execute(self, context):
        print("EXECUTE_STARTED", flush=True)
        os.kill(os.getppid(), signal.SIGTERM)
        time.sleep(2)

    def on_kill(self) -> None:
        print("ON_KILL_CALLED_VIA_SIGNAL_FORWARDING", flush=True)


@dag()
def signal_forward_test():
    SignalForwardOperator(task_id="signal_task")


signal_forward_test()
