mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2025-02-21 22:10:49 +03:00
68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
"""Dispatcher module."""
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import asyncio
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import logging
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import signal
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import time
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from typing import List
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from .monitors import Monitor
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logger = logging.getLogger(__name__)
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class Dispatcher:
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def __init__(self, monitors: List[Monitor]) -> None:
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self._monitors = monitors
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self._monitor_tasks: List[asyncio.Task] = [] # type: ignore
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self._stopping = False
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def run(self) -> None:
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asyncio.run(self._do_work())
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async def _do_work(self) -> None:
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logger.info('Dispatcher is starting up')
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for monitor in self._monitors:
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self._monitor_tasks.append(asyncio.create_task(self._run_monitor(monitor)))
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logger.info('Monitoring task has been started %s', monitor.full_name)
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asyncio.get_event_loop().add_signal_handler(signal.SIGTERM, self._stop)
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asyncio.get_event_loop().add_signal_handler(signal.SIGINT, self._stop)
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await asyncio.gather(*self._monitor_tasks, return_exceptions=True)
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self._stop()
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def _stop(self) -> None:
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if self._stopping:
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return
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self._stopping = True
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logger.info('Dispatcher is shutting down')
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for task, monitor in zip(self._monitor_tasks, self._monitors):
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task.cancel()
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logger.info('Monitoring task has been stopped %s', monitor.full_name)
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logger.info('Dispatcher shutting down finished successfully')
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@staticmethod
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async def _run_monitor(monitor: Monitor) -> None:
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def _until_next(last: float) -> float:
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time_took = time.time() - last
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return monitor.check_every - time_took
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while True:
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time_start = time.time()
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try:
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await monitor.check()
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except asyncio.CancelledError:
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break
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except Exception:
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monitor.logger.exception('Error running monitoring check')
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await asyncio.sleep(_until_next(last=time_start))
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