89 lines
3.1 KiB
Python
89 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2018 Google Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Shared utility structures and methods for handling request retries."""
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from __future__ import absolute_import
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from __future__ import print_function
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from __future__ import division
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from __future__ import unicode_literals
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import logging
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import time
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from apitools.base.py import http_wrapper
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from gslib import thread_message
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from gslib.utils import constants
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from retry_decorator import retry_decorator
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Retry = retry_decorator.retry # pylint: disable=invalid-name
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def LogAndHandleRetries(is_data_transfer=False, status_queue=None):
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"""Higher-order function allowing retry handler to access global status queue.
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Args:
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is_data_transfer: If True, disable retries in apitools.
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status_queue: The global status queue.
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Returns:
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A retry function for retryable errors in apitools.
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"""
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def WarnAfterManyRetriesHandler(retry_args):
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"""Exception handler for http failures in apitools.
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If the user has had to wait several seconds since their first request, print
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a progress message to the terminal to let them know we're still retrying,
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then perform the default retry logic and post a
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gslib.thread_message.RetryableErrorMessage to the global status queue.
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Args:
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retry_args: An apitools ExceptionRetryArgs tuple.
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"""
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if (retry_args.total_wait_sec is not None and
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retry_args.total_wait_sec >= constants.LONG_RETRY_WARN_SEC):
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logging.info('Retrying request, attempt #%d...', retry_args.num_retries)
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if status_queue:
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status_queue.put(
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thread_message.RetryableErrorMessage(
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retry_args.exc,
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time.time(),
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num_retries=retry_args.num_retries,
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total_wait_sec=retry_args.total_wait_sec))
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http_wrapper.HandleExceptionsAndRebuildHttpConnections(retry_args)
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def RetriesInDataTransferHandler(retry_args):
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"""Exception handler that disables retries in apitools data transfers.
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Post a gslib.thread_message.RetryableErrorMessage to the global status
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queue. We handle the actual retries within the download and upload
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functions.
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Args:
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retry_args: An apitools ExceptionRetryArgs tuple.
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"""
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if status_queue:
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status_queue.put(
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thread_message.RetryableErrorMessage(
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retry_args.exc,
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time.time(),
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num_retries=retry_args.num_retries,
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total_wait_sec=retry_args.total_wait_sec))
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http_wrapper.RethrowExceptionHandler(retry_args)
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if is_data_transfer:
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return RetriesInDataTransferHandler
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return WarnAfterManyRetriesHandler
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