87 lines
3.3 KiB
Python
87 lines
3.3 KiB
Python
"""
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MIT License
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Copyright (c) 2020 Airbyte
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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"""
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import sys
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import time
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import backoff
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from base_python.cdk.streams.exceptions import DefaultBackoffException, UserDefinedBackoffException
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from base_python.logger import AirbyteLogger
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from requests import codes, exceptions
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TRANSIENT_EXCEPTIONS = (DefaultBackoffException, exceptions.ConnectTimeout, exceptions.ReadTimeout, exceptions.ConnectionError)
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# TODO inject singleton logger?
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logger = AirbyteLogger()
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def default_backoff_handler(max_tries: int, factor: int, **kwargs):
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def log_retry_attempt(details):
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_, exc, _ = sys.exc_info()
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logger.info(str(exc))
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logger.info(f"Caught retryable error after {details['tries']} tries. Waiting {details['wait']} seconds then retrying...")
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def should_give_up(exc):
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# If a non-rate-limiting related 4XX error makes it this far, it means it was unexpected and probably consistent, so we shouldn't back off
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give_up = exc.response is not None and exc.response.status_code != codes.too_many_requests and 400 <= exc.response.status_code < 500
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if give_up:
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logger.info(f"Giving up for returned HTTP status: {exc.response.status_code}")
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return give_up
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return backoff.on_exception(
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backoff.expo,
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TRANSIENT_EXCEPTIONS,
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jitter=None,
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on_backoff=log_retry_attempt,
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giveup=should_give_up,
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max_tries=max_tries,
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factor=factor,
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**kwargs,
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)
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def user_defined_backoff_handler(max_tries: int, **kwargs):
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def sleep_on_ratelimit(details):
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_, exc, _ = sys.exc_info()
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if isinstance(exc, UserDefinedBackoffException):
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retry_after = exc.backoff
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logger.info(f"Retrying. Sleeping for {retry_after} seconds")
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time.sleep(retry_after + 1) # extra second to cover any fractions of second
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def log_give_up(details):
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_, exc, _ = sys.exc_info()
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logger.error(f"Max retry limit reached. Request: {exc.request}, Response: {exc.response}")
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return backoff.on_exception(
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backoff.constant,
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UserDefinedBackoffException,
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interval=0, # skip waiting, we'll wait in on_backoff handler
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on_backoff=sleep_on_ratelimit,
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on_giveup=log_give_up,
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jitter=None,
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max_tries=max_tries,
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**kwargs,
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)
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