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annotate piecrust/environment.py @ 417:eef887cec776

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internal: Add utility function for incrementing performance timers.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 20 Jun 2015 23:23:51 -0700
parents ff6cc43fb40c
children 3b658190c02b
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1 import time
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2 import logging
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3 import contextlib
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4 from piecrust.cache import MemCache
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7 logger = logging.getLogger(__name__)
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10 class ExecutionInfo(object):
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11 def __init__(self, page, render_ctx):
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12 self.page = page
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13 self.render_ctx = render_ctx
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14 self.was_cache_valid = False
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15 self.start_time = time.perf_counter()
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17
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18 class ExecutionInfoStack(object):
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19 def __init__(self):
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20 self._page_stack = []
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22 @property
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23 def current_page_info(self):
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24 if len(self._page_stack) == 0:
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25 return None
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26 return self._page_stack[-1]
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28 @property
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29 def is_main_page(self):
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30 return len(self._page_stack) == 1
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31
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32 def hasPage(self, page):
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33 for ei in self._page_stack:
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34 if ei.page == page:
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35 return True
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36 return False
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37
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38 def pushPage(self, page, render_ctx):
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39 if len(self._page_stack) > 0:
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40 top = self._page_stack[-1]
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41 assert top.page is not page
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42 self._page_stack.append(ExecutionInfo(page, render_ctx))
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44 def popPage(self):
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45 del self._page_stack[-1]
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46
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47 def clear(self):
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48 self._page_stack = []
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49
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51 class Environment(object):
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52 def __init__(self):
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53 self.start_time = None
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54 self.exec_info_stack = ExecutionInfoStack()
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55 self.was_cache_cleaned = False
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56 self.base_asset_url_format = '%uri%'
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57 self.page_repository = MemCache()
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58 self.rendered_segments_repository = MemCache()
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59 self.fs_caches = {
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60 'renders': self.rendered_segments_repository}
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61 self.fs_cache_only_for_main_page = False
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62 self._timers = {}
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64 def initialize(self, app):
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65 self.start_time = time.perf_counter()
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66 self.exec_info_stack.clear()
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67 self.was_cache_cleaned = False
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68 self.base_asset_url_format = '%uri%'
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69 self._onSubCacheDirChanged(app)
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71 def registerTimer(self, category, *, raise_if_registered=True):
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72 if raise_if_registered and category in self._timers:
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73 raise Exception("Timer '%s' has already been registered." %
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74 category)
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75 self._timers[category] = 0
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76
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77 @contextlib.contextmanager
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78 def timerScope(self, category):
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79 start = time.perf_counter()
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80 yield
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81 self._timers[category] += time.perf_counter() - start
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82
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83 def stepTimer(self, category, value):
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84 self._timers[category] += value
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85
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86 def stepTimerSince(self, category, since):
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87 self.stepTimer(category, time.perf_counter() - since)
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89 def _onSubCacheDirChanged(self, app):
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90 for name, repo in self.fs_caches.items():
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91 cache = app.cache.getCache(name)
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92 repo.fs_cache = cache
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95 class StandardEnvironment(Environment):
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96 def __init__(self):
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97 super(StandardEnvironment, self).__init__()
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98