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[Launchpad Bug Tracker <1386047@xxxxxxxxxxxxxxxxxx>]

[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1386047

Title:
  plugin(core, service) is unnecessarily cached and they are implemented
  variously by many times

Status in neutron:
  Expired

Bug description:
  There are patterns like

      @property
      def core_plugin(self):
          try:
              return self._core_plugin
          except AttributeError:
              self._core_plugin = manager.NeutronManager.get_plugin()
              return self._core_plugin

  There are issues.
  - NeutronManager.get_plugin already cached it. No need to cache again.
  - each class implements its own way(with or without cache), various name.

  The caching should be removed and their implementation should be
  unified

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