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annotate piecrust/baking/scheduler.py @ 661:2f780b191541

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internal: Fix a bug with registering taxonomy terms that are not strings. Some objects, like the blog data provider's taxnonomy entries, can render as strings, but are objects themselves. When registering them as "used terms", we need to use their string representation.
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 01 Mar 2016 22:26:09 -0800
parents 938be93215cb
children
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1 import logging
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2 import threading
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3
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4
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5 logger = logging.getLogger(__name__)
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6
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7
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8 class BakeScheduler(object):
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9 _EMPTY = object()
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10 _WAIT = object()
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11
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12 def __init__(self, record, jobs=None):
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13 self.record = record
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14 self.jobs = list(jobs) if jobs is not None else []
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15 self._active_jobs = []
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16 self._lock = threading.Lock()
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17 self._added_event = threading.Event()
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18 self._done_event = threading.Event()
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19
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20 def addJob(self, job):
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21 logger.debug("Queuing job '%s:%s'." % (
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22 job.factory.source.name, job.factory.rel_path))
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23 with self._lock:
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24 self.jobs.append(job)
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25 self._added_event.set()
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26
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27 def onJobFinished(self, job):
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28 logger.debug("Removing job '%s:%s'." % (
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29 job.factory.source.name, job.factory.rel_path))
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30 with self._lock:
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31 self._active_jobs.remove(job)
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32 self._done_event.set()
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33
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34 def getNextJob(self, wait_timeout=None, empty_timeout=None):
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35 self._added_event.clear()
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36 self._done_event.clear()
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37 job = self._doGetNextJob()
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38 while job in (self._EMPTY, self._WAIT):
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39 if job == self._EMPTY:
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40 if empty_timeout is None:
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41 return None
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42 logger.debug("Waiting for a new job to be added...")
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43 res = self._added_event.wait(empty_timeout)
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44 elif job == self._WAIT:
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45 if wait_timeout is None:
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46 return None
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47 logger.debug("Waiting for a job to be finished...")
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48 res = self._done_event.wait(wait_timeout)
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49 if not res:
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50 logger.debug("Timed-out. No job found.")
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51 return None
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52 job = self._doGetNextJob()
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53 return job
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54
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55 def _doGetNextJob(self):
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56 with self._lock:
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57 if len(self.jobs) == 0:
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58 return self._EMPTY
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59
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60 job = self.jobs.pop(0)
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61 first_job = job
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62 while True:
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63 ready, wait_on_src = self._isJobReady(job)
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64 if ready:
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65 break
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66
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67 logger.debug("Job '%s:%s' isn't ready yet: waiting on pages "
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68 "from source '%s' to finish baking." %
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69 (job.factory.source.name,
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70 job.factory.rel_path, wait_on_src))
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71 self.jobs.append(job)
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72 job = self.jobs.pop(0)
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73 if job == first_job:
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74 # None of the jobs are ready... we need to wait.
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75 self.jobs.append(job)
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76 return self._WAIT
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77
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78 logger.debug(
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79 "Job '%s:%s' is ready to go, moving to active queue." %
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80 (job.factory.source.name, job.factory.rel_path))
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81 self._active_jobs.append(job)
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82 return job
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83
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84 def _isJobReady(self, job):
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85 e = self.record.getPreviousEntry(
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86 job.factory.source.name,
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87 job.factory.rel_path,
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88 taxonomy_info=job.record_entry.taxonomy_info)
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89 if not e:
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90 return (True, None)
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91 used_source_names = e.getAllUsedSourceNames()
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92 for sn in used_source_names:
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93 if sn == job.factory.source.name:
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94 continue
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95 if any(filter(lambda j: j.factory.source.name == sn,
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96 self.jobs)):
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97 return (False, sn)
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98 if any(filter(lambda j: j.factory.source.name == sn,
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99 self._active_jobs)):
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100 return (False, sn)
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101 return (True, None)
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102