text: #The MIT License (MIT)
  #Copyright (c) 2014 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 resource throttle retry policy implementation in the Azure Cosmos database service.
  """
  
  from . import http_constants
  
  class ResourceThrottleRetryPolicy(object):
  
      def __init__(self, max_retry_attempt_count, fixed_retry_interval_in_milliseconds, max_wait_time_in_seconds):
          self._max_retry_attempt_count = max_retry_attempt_count
          self._fixed_retry_interval_in_milliseconds = fixed_retry_interval_in_milliseconds
          self._max_wait_time_in_milliseconds = max_wait_time_in_seconds * 1000
          self.current_retry_attempt_count = 0
          self.cummulative_wait_time_in_milliseconds = 0
  
      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:
              self.current_retry_attempt_count += 1
              self.retry_after_in_milliseconds = 0
                  
              if self._fixed_retry_interval_in_milliseconds:
                  self.retry_after_in_milliseconds = self._fixed_retry_interval_in_milliseconds
              elif http_constants.HttpHeaders.RetryAfterInMilliseconds in exception.headers:
                  self.retry_after_in_milliseconds = int(exception.headers[http_constants.HttpHeaders.RetryAfterInMilliseconds])
                  
              if self.cummulative_wait_time_in_milliseconds < self._max_wait_time_in_milliseconds:
                  self.cummulative_wait_time_in_milliseconds += self.retry_after_in_milliseconds
                  return True
              
          return False
      
  