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annotate piecrust/environment.py @ 3:f485ba500df3

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Gigantic change to basically make PieCrust 2 vaguely functional. - Serving works, with debug window. - Baking works, multi-threading, with dependency handling. - Various things not implemented yet.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 10 Aug 2014 23:43:16 -0700
parents aaa8fb7c8918
children 30a42341cfa8
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f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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1 import time
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2 import logging
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3 import threading
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4 import repoze.lru
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7 logger = logging.getLogger(__name__)
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10 class MemCache(object):
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11 def __init__(self, size=2048):
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12 self.cache = repoze.lru.LRUCache(size)
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13 self.lock = threading.RLock()
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15 def get(self, key, item_maker):
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16 item = self.cache.get(key)
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17 if item is None:
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18 logger.debug("Acquiring lock for: %s" % key)
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19 with self.lock:
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20 item = self.cache.get(key)
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21 if item is None:
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22 logger.debug("'%s' not found in cache, must build." % key)
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23 item = item_maker()
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24 self.cache.put(key, item)
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25 return item
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28 PHASE_PAGE_PARSING = 0
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29 PHASE_PAGE_FORMATTING = 1
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30 PHASE_PAGE_RENDERING = 2
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33 class ExecutionInfo(object):
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34 def __init__(self, page, phase, render_ctx):
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35 self.page = page
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36 self.phase = phase
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37 self.render_ctx = render_ctx
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38 self.was_cache_valid = False
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39 self.start_time = time.clock()
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42 class ExecutionInfoStack(threading.local):
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43 def __init__(self):
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44 self._page_stack = []
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45
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46 @property
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47 def current_page_info(self):
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48 if len(self._page_stack) == 0:
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49 return None
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50 return self._page_stack[-1]
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51
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52 @property
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53 def is_main_page(self):
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54 return len(self._page_stack) == 1
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56 def pushPage(self, page, phase, render_ctx):
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57 self._page_stack.append(ExecutionInfo(page, phase, render_ctx))
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58
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59 def popPage(self):
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60 del self._page_stack[-1]
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63 class Environment(object):
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64 def __init__(self):
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65 self.start_time = time.clock()
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66 self.exec_info_stack = ExecutionInfoStack()
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67 self.was_cache_cleaned = False
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68 self.page_repository = MemCache()
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69 self.rendered_segments_repository = MemCache()
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70 self.base_asset_url_format = '%site_root%%uri%'
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72 def initialize(self, app):
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73 pass
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76 class StandardEnvironment(Environment):
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77 def __init__(self):
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78 super(StandardEnvironment, self).__init__()
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