Library for running OpenStack services
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  1. # Licensed under the Apache License, Version 2.0 (the "License"); you may
  2. # not use this file except in compliance with the License. You may obtain
  3. # a copy of the License at
  4. #
  5. # http://www.apache.org/licenses/LICENSE-2.0
  6. #
  7. # Unless required by applicable law or agreed to in writing, software
  8. # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  9. # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  10. # License for the specific language governing permissions and limitations
  11. # under the License.
  12. import os
  13. import eventlet.patcher
  14. time = eventlet.patcher.original('time')
  15. def service_hub():
  16. # NOTE(dims): Add a custom impl for EVENTLET_HUB, so we can
  17. # override the clock used in the eventlet hubs. The default
  18. # uses time.time() and we need to use a monotonic timer
  19. # to ensure that things like loopingcall work properly.
  20. hub = eventlet.hubs.get_default_hub().Hub()
  21. hub.clock = time.monotonic
  22. # get_default_hub() will return a hub that is supported on this platform
  23. hub.is_available = lambda: True
  24. return hub
  25. os.environ['EVENTLET_HUB'] = 'oslo_service:service_hub'