Mercurial > piecrust2

annotate piecrust/baking/worker.py @ 425:afeebdd9f767

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bake: Pass the sub-cache directory to the bake workers.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 25 Jun 2015 14:51:37 -0700
parents a8a12f97addf
children ed5ccd4cce49
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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, sub_cache_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.sub_cache_dir = sub_cache_dir
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27 self.out_dir = out_dir
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28 self.work_queue = work_queue
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29 self.results = results
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30 self.abort_event = abort_event
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31 self.force = force
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32 self.debug = debug
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33
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34
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35 JOB_LOAD, JOB_RENDER_FIRST, JOB_BAKE = range(0, 3)
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36
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37
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38 class BakeWorkerJob(object):
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39 def __init__(self, job_type, payload):
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40 self.job_type = job_type
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41 self.payload = payload
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42
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43
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44 class BakeWorker(object):
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45 def __init__(self, wid, ctx):
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46 self.wid = wid
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47 self.ctx = ctx
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48
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49 def run(self):
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50 logger.debug("Working %d initializing..." % self.wid)
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51 work_start_time = time.perf_counter()
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52
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53 # Create the app local to this worker.
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54 app = PieCrust(self.ctx.root_dir, debug=self.ctx.debug)
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55 app._useSubCacheDir(self.ctx.sub_cache_dir)
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56 app.env.fs_cache_only_for_main_page = True
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57 app.env.registerTimer("BakeWorker_%d_Total" % self.wid)
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58 app.env.registerTimer("BakeWorkerInit")
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59 app.env.registerTimer("JobReceive")
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60
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61 # Create the job handlers.
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62 job_handlers = {
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63 JOB_LOAD: LoadJobHandler(app, self.ctx),
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64 JOB_RENDER_FIRST: RenderFirstSubJobHandler(app, self.ctx),
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65 JOB_BAKE: BakeJobHandler(app, self.ctx)}
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66 for jt, jh in job_handlers.items():
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67 app.env.registerTimer(type(jh).__name__)
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68
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69 app.env.stepTimerSince("BakeWorkerInit", work_start_time)
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70
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71 # Start working!
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72 aborted_with_exception = None
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73 while not self.ctx.abort_event.is_set():
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74 try:
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75 with app.env.timerScope('JobReceive'):
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76 job = self.ctx.work_queue.get(True, 0.01)
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77 except queue.Empty:
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78 continue
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79
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80 try:
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81 handler = job_handlers[job.job_type]
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82 with app.env.timerScope(type(handler).__name__):
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83 handler.handleJob(job)
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84 except Exception as ex:
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85 self.ctx.abort_event.set()
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86 aborted_with_exception = ex
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87 logger.debug("[%d] Critical error, aborting." % self.wid)
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88 if self.ctx.debug:
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89 logger.exception(ex)
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90 break
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91 finally:
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92 self.ctx.work_queue.task_done()
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93
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94 if aborted_with_exception is not None:
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95 msgs = _get_errors(aborted_with_exception)
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96 self.ctx.results.put_nowait({'type': 'error', 'messages': msgs})
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97
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98 # Send our timers to the main process before exiting.
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99 app.env.stepTimerSince("BakeWorker_%d_Total" % self.wid,
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100 work_start_time)
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101 self.ctx.results.put_nowait({
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102 'type': 'timers', 'data': app.env._timers})
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103
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104
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105 class JobHandler(object):
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106 def __init__(self, app, ctx):
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107 self.app = app
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108 self.ctx = ctx
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109
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110 def handleJob(self, job):
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111 raise NotImplementedError()
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112
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113
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114 def _get_errors(ex):
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115 errors = []
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116 while ex is not None:
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117 errors.append(str(ex))
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118 ex = ex.__cause__
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119 return errors
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120
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121
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122 class PageFactoryInfo(object):
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123 def __init__(self, fac):
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124 self.source_name = fac.source.name
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125 self.rel_path = fac.rel_path
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126 self.metadata = fac.metadata
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127
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128 def build(self, app):
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129 source = app.getSource(self.source_name)
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130 return PageFactory(source, self.rel_path, self.metadata)
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131
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132
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133 class LoadJobPayload(object):
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134 def __init__(self, fac):
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135 self.factory_info = PageFactoryInfo(fac)
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136
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137
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138 class LoadJobResult(object):
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139 def __init__(self, source_name, path):
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140 self.source_name = source_name
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141 self.path = path
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142 self.config = None
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143 self.errors = None
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144
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145
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146 class RenderFirstSubJobPayload(object):
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147 def __init__(self, fac):
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148 self.factory_info = PageFactoryInfo(fac)
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149
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150
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151 class RenderFirstSubJobResult(object):
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152 def __init__(self, path):
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153 self.path = path
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154 self.errors = None
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155
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156
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157 class BakeJobPayload(object):
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158 def __init__(self, fac, route_metadata, previous_entry,
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159 dirty_source_names, tax_info=None):
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160 self.factory_info = PageFactoryInfo(fac)
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161 self.route_metadata = route_metadata
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162 self.previous_entry = previous_entry
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163 self.dirty_source_names = dirty_source_names
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164 self.taxonomy_info = tax_info
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165
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166
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167 class BakeJobResult(object):
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168 def __init__(self, path, tax_info=None):
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169 self.path = path
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170 self.taxonomy_info = tax_info
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171 self.sub_entries = None
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172 self.errors = None
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173
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174
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175 class LoadJobHandler(JobHandler):
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176 def handleJob(self, job):
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177 # Just make sure the page has been cached.
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178 fac = job.payload.factory_info.build(self.app)
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179 logger.debug("Loading page: %s" % fac.ref_spec)
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180 result = LoadJobResult(fac.source.name, fac.path)
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181 try:
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182 page = fac.buildPage()
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183 page._load()
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184 result.config = page.config.get()
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185 except Exception as ex:
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186 logger.debug("Got loading error. Sending it to master.")
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187 result.errors = _get_errors(ex)
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188 if self.ctx.debug:
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189 logger.exception(ex)
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190
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191 self.ctx.results.put_nowait(result)
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192
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193
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194 class RenderFirstSubJobHandler(JobHandler):
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195 def handleJob(self, job):
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196 # Render the segments for the first sub-page of this page.
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197 fac = job.payload.factory_info.build(self.app)
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198
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199 # These things should be OK as they're checked upstream by the baker.
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200 route = self.app.getRoute(fac.source.name, fac.metadata,
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201 skip_taxonomies=True)
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202 assert route is not None
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203
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204 page = fac.buildPage()
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205 route_metadata = copy.deepcopy(fac.metadata)
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206 qp = QualifiedPage(page, route, route_metadata)
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207 ctx = PageRenderingContext(qp)
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208
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209 result = RenderFirstSubJobResult(fac.path)
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210 logger.debug("Preparing page: %s" % fac.ref_spec)
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211 try:
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212 render_page_segments(ctx)
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213 except Exception as ex:
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214 logger.debug("Got rendering error. Sending it to master.")
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215 result.errors = _get_errors(ex)
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216 if self.ctx.debug:
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217 logger.exception(ex)
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218
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219 self.ctx.results.put_nowait(result)
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220
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221
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222 class BakeJobHandler(JobHandler):
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223 def __init__(self, app, ctx):
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224 super(BakeJobHandler, self).__init__(app, ctx)
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225 self.page_baker = PageBaker(app, ctx.out_dir, ctx.force)
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226
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227 def handleJob(self, job):
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228 # Actually bake the page and all its sub-pages to the output folder.
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229 fac = job.payload.factory_info.build(self.app)
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230
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231 route_metadata = job.payload.route_metadata
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232 tax_info = job.payload.taxonomy_info
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233 if tax_info is not None:
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234 route = self.app.getTaxonomyRoute(tax_info.taxonomy_name,
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235 tax_info.source_name)
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236 else:
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237 route = self.app.getRoute(fac.source.name, route_metadata,
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238 skip_taxonomies=True)
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239 assert route is not None
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240
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241 result = BakeJobResult(fac.path, tax_info)
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242 previous_entry = job.payload.previous_entry
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243 dirty_source_names = job.payload.dirty_source_names
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244 logger.debug("Baking page: %s" % fac.ref_spec)
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245 try:
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246 sub_entries = self.page_baker.bake(
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247 fac, route, route_metadata, previous_entry,
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248 dirty_source_names, tax_info)
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249 result.sub_entries = sub_entries
411
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250
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251 except BakingError as ex:
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252 logger.debug("Got baking error. Sending it to master.")
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253 result.errors = _get_errors(ex)
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diff changeset
254 if self.ctx.debug:
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255 logger.exception(ex)
411
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diff changeset
256
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257 self.ctx.results.put_nowait(result)
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258