Created
August 8, 2021 12:55
-
-
Save DrJackilD/2e1c9e3c708f1559129e7e4faa9efcb8 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| """ | |
| Backoff policy for agile retrying with increasing delay | |
| """ | |
| import asyncio | |
| import logging | |
| from typing import Awaitable, Callable | |
| logger = logging.getLogger(__name__) | |
| class BackoffPolicy: | |
| """ | |
| Helper to retry async execution with retries and increasing delays | |
| """ | |
| def __init__(self, max_retries: int, start_delay: int, delay_step: int): | |
| self.max_retries = max_retries | |
| self.start_delay = start_delay | |
| self.delay_step = delay_step | |
| async def run(self, func: Callable[..., Awaitable[None]], *args, **kwargs): | |
| attempt = 1 | |
| delay = self.start_delay | |
| while attempt <= self.max_retries: | |
| logger.debug(f"Try {attempt}/{self.max_retries} for {func}") | |
| try: | |
| return await func(*args, **kwargs) | |
| except Exception as e: | |
| logger.exception( | |
| f"Error during run {func}. retry after {delay} seconds", exc_info=e | |
| ) | |
| await asyncio.sleep(delay) | |
| delay += self.delay_step | |
| attempt += 1 | |
| else: | |
| logger.error(f"Max retries exceed with {func}, cannot recover") | |
| raise MaxRetriesExceeded(f"Max retries exceed with {func}, cannot recover") | |
| class MaxRetriesExceeded(Exception): | |
| pass |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment