Mercurial > piecrust2

annotate piecrust/baking/worker.py @ 418:d5724c0c8f1a

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serve: Fix crash on start.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 20 Jun 2015 23:24:17 -0700
parents 0e9a94b7fdfa
children 4a43d7015b75
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411
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1 import time
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2 import copy
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3 import queue
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4 import logging
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5 from piecrust.app import PieCrust
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6 from piecrust.baking.single import PageBaker, BakingError
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7 from piecrust.rendering import (
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8 QualifiedPage, PageRenderingContext, render_page_segments)
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9 from piecrust.sources.base import PageFactory
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10
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11
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12 logger = logging.getLogger(__name__)
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13
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14
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15 def worker_func(wid, ctx):
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16 logger.debug("Worker %d booting up..." % wid)
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17 w = BakeWorker(wid, ctx)
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18 w.run()
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19
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20
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21 class BakeWorkerContext(object):
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22 def __init__(self, root_dir, out_dir,
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23 work_queue, results, abort_event,
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24 force=False, debug=False):
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25 self.root_dir = root_dir
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26 self.out_dir = out_dir
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27 self.work_queue = work_queue
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28 self.results = results
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29 self.abort_event = abort_event
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30 self.force = force
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31 self.debug = debug
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32
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33
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34 JOB_LOAD, JOB_RENDER_FIRST, JOB_BAKE = range(0, 3)
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35
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36
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37 class BakeWorkerJob(object):
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38 def __init__(self, job_type, payload):
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39 self.job_type = job_type
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40 self.payload = payload
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41
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42
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43 class BakeWorker(object):
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44 def __init__(self, wid, ctx):
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45 self.wid = wid
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46 self.ctx = ctx
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47
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48 def run(self):
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49 logger.debug("Working %d initializing..." % self.wid)
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50 work_start_time = time.perf_counter()
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51
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52 # Create the app local to this worker.
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53 app = PieCrust(self.ctx.root_dir, debug=self.ctx.debug)
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54 app.env.fs_cache_only_for_main_page = True
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55 app.env.registerTimer("Worker_%d" % self.wid)
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56 app.env.registerTimer("JobReceive")
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57
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58 # Create the job handlers.
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59 job_handlers = {
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60 JOB_LOAD: LoadJobHandler(app, self.ctx),
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61 JOB_RENDER_FIRST: RenderFirstSubJobHandler(app, self.ctx),
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62 JOB_BAKE: BakeJobHandler(app, self.ctx)}
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63 for jt, jh in job_handlers.items():
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64 app.env.registerTimer(type(jh).__name__)
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65
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66 # Start working!
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67 aborted_with_exception = None
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68 while not self.ctx.abort_event.is_set():
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69 try:
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70 with app.env.timerScope('JobReceive'):
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71 job = self.ctx.work_queue.get(True, 0.01)
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72 except queue.Empty:
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73 continue
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74
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75 try:
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76 handler = job_handlers[job.job_type]
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77 with app.env.timerScope(type(handler).__name__):
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78 handler.handleJob(job)
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79 except Exception as ex:
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80 self.ctx.abort_event.set()
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81 aborted_with_exception = ex
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82 logger.debug("[%d] Critical error, aborting." % self.wid)
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83 if self.ctx.debug:
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84 logger.exception(ex)
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85 break
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86 finally:
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87 self.ctx.work_queue.task_done()
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88
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89 if aborted_with_exception is not None:
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90 msgs = _get_errors(aborted_with_exception)
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91 self.ctx.results.put_nowait({'type': 'error', 'messages': msgs})
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92
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93 # Send our timers to the main process before exiting.
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94 app.env.stepTimer("Worker_%d" % self.wid,
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95 time.perf_counter() - work_start_time)
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96 self.ctx.results.put_nowait({
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97 'type': 'timers', 'data': app.env._timers})
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98
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99
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100 class JobHandler(object):
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101 def __init__(self, app, ctx):
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102 self.app = app
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103 self.ctx = ctx
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104
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105 def handleJob(self, job):
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106 raise NotImplementedError()
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107
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108
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109 def _get_errors(ex):
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110 errors = []
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111 while ex is not None:
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112 errors.append(str(ex))
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113 ex = ex.__cause__
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114 return errors
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115
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116
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117 class PageFactoryInfo(object):
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118 def __init__(self, fac):
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119 self.source_name = fac.source.name
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120 self.rel_path = fac.rel_path
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121 self.metadata = fac.metadata
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122
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123 def build(self, app):
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124 source = app.getSource(self.source_name)
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125 return PageFactory(source, self.rel_path, self.metadata)
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126
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127
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128 class LoadJobPayload(object):
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129 def __init__(self, fac):
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130 self.factory_info = PageFactoryInfo(fac)
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131
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132
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133 class LoadJobResult(object):
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134 def __init__(self, source_name, path):
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135 self.source_name = source_name
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136 self.path = path
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137 self.config = None
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138 self.errors = None
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139
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140
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141 class RenderFirstSubJobPayload(object):
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142 def __init__(self, fac):
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143 self.factory_info = PageFactoryInfo(fac)
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144
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145
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146 class RenderFirstSubJobResult(object):
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147 def __init__(self, path):
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148 self.path = path
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149 self.errors = None
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150
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151
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152 class BakeJobPayload(object):
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153 def __init__(self, fac, route_metadata, previous_entry,
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154 dirty_source_names, tax_info=None):
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155 self.factory_info = PageFactoryInfo(fac)
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156 self.route_metadata = route_metadata
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157 self.previous_entry = previous_entry
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158 self.dirty_source_names = dirty_source_names
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159 self.taxonomy_info = tax_info
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160
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161
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162 class BakeJobResult(object):
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163 def __init__(self, path, tax_info=None):
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164 self.path = path
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165 self.taxonomy_info = tax_info
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166 self.sub_entries = None
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167 self.errors = None
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168
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169
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170 class LoadJobHandler(JobHandler):
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171 def handleJob(self, job):
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172 # Just make sure the page has been cached.
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173 fac = job.payload.factory_info.build(self.app)
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174 logger.debug("Loading page: %s" % fac.ref_spec)
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175 result = LoadJobResult(fac.source.name, fac.path)
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176 try:
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177 page = fac.buildPage()
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178 page._load()
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179 result.config = page.config.get()
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180 except Exception as ex:
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181 logger.debug("Got loading error. Sending it to master.")
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182 result.errors = _get_errors(ex)
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183 if self.ctx.debug:
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184 logger.exception(ex)
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185
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186 self.ctx.results.put_nowait(result)
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187
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188
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189 class RenderFirstSubJobHandler(JobHandler):
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190 def handleJob(self, job):
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191 # Render the segments for the first sub-page of this page.
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192 fac = job.payload.factory_info.build(self.app)
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193
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194 # These things should be OK as they're checked upstream by the baker.
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195 route = self.app.getRoute(fac.source.name, fac.metadata,
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196 skip_taxonomies=True)
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197 assert route is not None
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198
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199 page = fac.buildPage()
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200 route_metadata = copy.deepcopy(fac.metadata)
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201 qp = QualifiedPage(page, route, route_metadata)
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202 ctx = PageRenderingContext(qp)
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203
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204 result = RenderFirstSubJobResult(fac.path)
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205 logger.debug("Preparing page: %s" % fac.ref_spec)
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206 try:
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207 render_page_segments(ctx)
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208 except Exception as ex:
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209 logger.debug("Got rendering error. Sending it to master.")
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210 result.errors = _get_errors(ex)
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211 if self.ctx.debug:
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212 logger.exception(ex)
411
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213
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214 self.ctx.results.put_nowait(result)
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215
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216
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217 class BakeJobHandler(JobHandler):
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218 def __init__(self, app, ctx):
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219 super(BakeJobHandler, self).__init__(app, ctx)
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220 self.page_baker = PageBaker(app, ctx.out_dir, ctx.force)
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221
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222 def handleJob(self, job):
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223 # Actually bake the page and all its sub-pages to the output folder.
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224 fac = job.payload.factory_info.build(self.app)
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225
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226 route_metadata = job.payload.route_metadata
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227 tax_info = job.payload.taxonomy_info
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228 if tax_info is not None:
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229 route = self.app.getTaxonomyRoute(tax_info.taxonomy_name,
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diff changeset
230 tax_info.source_name)
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231 else:
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232 route = self.app.getRoute(fac.source.name, route_metadata,
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233 skip_taxonomies=True)
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234 assert route is not None
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235
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236 result = BakeJobResult(fac.path, tax_info)
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237 previous_entry = job.payload.previous_entry
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238 dirty_source_names = job.payload.dirty_source_names
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239 logger.debug("Baking page: %s" % fac.ref_spec)
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240 try:
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diff changeset
241 sub_entries = self.page_baker.bake(
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diff changeset
242 fac, route, route_metadata, previous_entry,
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diff changeset
243 dirty_source_names, tax_info)
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diff changeset
244 result.sub_entries = sub_entries
411
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245
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diff changeset
246 except BakingError as ex:
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247 logger.debug("Got baking error. Sending it to master.")
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248 result.errors = _get_errors(ex)
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
249 if self.ctx.debug:
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diff changeset
250 logger.exception(ex)
411
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diff changeset
251
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252 self.ctx.results.put_nowait(result)
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diff changeset
253