rwlaunchpad/plugins/rwautoscaler/rift/tasklets/rwautoscaler/scaling_operation.py

   1
   2 #
   3 #   Copyright 2016 RIFT.IO Inc
   4 #
   5 #   Licensed under the Apache License, Version 2.0 (the "License");
   6 #   you may not use this file except in compliance with the License.
   7 #   You may obtain a copy of the License at
   8 #
   9 #       http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 #   Unless required by applicable law or agreed to in writing, software
  12 #   distributed under the License is distributed on an "AS IS" BASIS,
  13 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 #   See the License for the specific language governing permissions and
  15 #   limitations under the License.
  16 #
  17
  18 import abc
  19
  20 def get_operation(operation):
  21
  22     op_map = {"AND": AndScalingOperation(),
  23               "OR": OrScalingOperation()}
  24
  25     return op_map[operation]
  26
  27
  28 class ScalingOperation:
  29     @abc.abstractmethod
  30     def __call__(self, statuses):
  31         pass
  32
  33
  34 class AndScalingOperation():
  35     def __call__(self, statuses):
  36         return all(statuses)
  37
  38
  39 class OrScalingOperation():
  40     def __call__(self, statuses):
  41         return any(statuses)