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Viewing changes to lib/lp/services/timeline/nestingtimedaction.py

  • Committer: Robert Collins
  • Date: 2011-08-10 01:00:53 UTC
  • mto: This revision was merged to the branch mainline in revision 13644.
  • Revision ID: robertc@robertcollins.net-20110810010053-w2tcm21i87fwqr3s
Use the new extracted timeline module.

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lib/lp/services/timeline/nestingtimedaction.py
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# Copyright 2010 Canonical Ltd.  This software is licensed under the
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# GNU Affero General Public License version 3 (see the file LICENSE).
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"""Time an action which calls other timed actions."""
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__all__ = ['NestingTimedAction']
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__metaclass__ = type
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import datetime
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from timedaction import TimedAction
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class NestingTimedAction(TimedAction):
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    """A variation of TimedAction which creates a nested environment.
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    This is done by recording two 0 length timed actions in the timeline:
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    one at the start of the action and one at the end, with -start and
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    -stop appended to their categories.
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    See `TimedAction` for more information.
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    """
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    def _init(self):
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        self.duration = datetime.timedelta()
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        self._category = self.category
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        self.category = self._category + '-start'
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    def finish(self):
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        """Mark the TimedAction as finished."""
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        end = self.timeline.start(self._category + '-stop', self.detail)
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        end.duration = datetime.timedelta()