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#The MIT License (MIT)
#Copyright (c) 2017 Microsoft Corporation
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#The above copyright notice and this permission notice shall be included in all
#copies or substantial portions of the Software.
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
#SOFTWARE.
"""Internal class for connection reset retry policy implementation in the Azure Cosmos database service.
"""
import azure.cosmos.http_constants as http_constants
class _DefaultRetryPolicy(object):
error_codes = http_constants._ErrorCodes
CONNECTION_ERROR_CODES = [
error_codes.WindowsInterruptedFunctionCall,
error_codes.WindowsFileHandleNotValid,
error_codes.WindowsPermissionDenied,
error_codes.WindowsBadAddress,
error_codes.WindowsInvalidArgumnet,
error_codes.WindowsResourceTemporarilyUnavailable,
error_codes.WindowsOperationNowInProgress,
error_codes.WindowsAddressAlreadyInUse,
error_codes.WindowsConnectionResetByPeer,
error_codes.WindowsCannotSendAfterSocketShutdown,
error_codes.WindowsConnectionTimedOut,
error_codes.WindowsConnectionRefused,
error_codes.WindowsNameTooLong,
error_codes.WindowsHostIsDown,
error_codes.WindowsNoRouteTohost,
error_codes.LinuxConnectionReset
]
def __init__(self, *args):
self._max_retry_attempt_count = 10
self.current_retry_attempt_count = 0
self.retry_after_in_milliseconds = 1000
self.args = args
def needsRetry(self, error_code):
if error_code in _DefaultRetryPolicy.CONNECTION_ERROR_CODES:
if (len(self.args) > 0):
if (self.args[4]['method'] == 'GET') or (http_constants.HttpHeaders.IsQuery in self.args[4]['headers']):
return True
return False
return True
def ShouldRetry(self, exception):
"""Returns true if should retry based on the passed-in exception.
:param (errors.HTTPFailure instance) exception:
:rtype:
boolean
"""
if (self.current_retry_attempt_count < self._max_retry_attempt_count) and self.needsRetry(exception.status_code):
self.current_retry_attempt_count += 1
return True
return False
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