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annotate piecrust/data/piecrustdata.py @ 440:32c7c2d219d2

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performance: Refactor how data is managed to reduce copying. * Make use of `collections.abc.Mapping` to better identify things that are supposed to look like dictionaries. * Instead of handling "overlay" of data in a dict tree in each different data object, make all objects `Mapping`s and handle merging at a higher level with the new `MergedMapping` object. * Since this new object is read-only, remove the need for deep-copying of app and page configurations. * Split data classes into separate modules.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 28 Jun 2015 08:22:39 -0700
parents
children 93b656f0af54
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440
32c7c2d219d2 performance: Refactor how data is managed to reduce copying.
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1 import logging
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2 from piecrust import APP_VERSION
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3 from piecrust.data.debug import build_debug_info
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4
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5
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6 logger = logging.getLogger(__name__)
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7
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8
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9 class PieCrustData(object):
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10 debug_render = ['version', 'url', 'branding', 'debug_info']
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11 debug_render_invoke = ['version', 'url', 'branding', 'debug_info']
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12 debug_render_redirect = {'debug_info': '_debugRenderDebugInfo'}
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13
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14 def __init__(self):
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15 self.version = APP_VERSION
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16 self.url = 'http://bolt80.com/piecrust/'
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17 self.branding = 'Baked with <em><a href="%s">PieCrust</a> %s</em>.' % (
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18 'http://bolt80.com/piecrust/', APP_VERSION)
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19 self._page = None
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20 self._data = None
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21
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22 @property
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23 def debug_info(self):
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24 if self._page is not None and self._data is not None:
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25 try:
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26 return build_debug_info(self._page, self._data)
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27 except Exception as ex:
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28 logger.exception(ex)
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29 return ('An error occured while generating debug info. '
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30 'Please check the logs.')
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31 return ''
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32
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33 def _enableDebugInfo(self, page, data):
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34 self._page = page
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35 self._data = data
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36
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37 def _debugRenderDebugInfo(self):
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38 return "The very thing you're looking at!"