Mercurial > kallithea
annotate pylons_app/lib/celerylib/__init__.py @ 498:6aa7db1c083a celery
version bump, small readme update
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Thu, 23 Sep 2010 01:21:46 +0200 |
parents | fb0c3af6031b |
children | ac32a026c306 |
rev | line source |
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1 from pylons_app.lib.pidlock import DaemonLock, LockHeld |
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2 from vcs.utils.lazy import LazyProperty |
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3 from decorator import decorator |
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4 import logging |
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5 import os |
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6 import sys |
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7 import traceback |
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8 from hashlib import md5 |
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9 log = logging.getLogger(__name__) |
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10 |
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11 class ResultWrapper(object): |
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12 def __init__(self, task): |
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13 self.task = task |
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14 |
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15 @LazyProperty |
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16 def result(self): |
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17 return self.task |
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18 |
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19 def run_task(task, *args, **kwargs): |
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20 try: |
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21 t = task.delay(*args, **kwargs) |
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22 log.info('running task %s', t.task_id) |
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23 return t |
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24 except Exception, e: |
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25 print e |
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26 if e.errno == 111: |
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27 log.debug('Unnable to connect. Sync execution') |
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28 else: |
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29 log.error(traceback.format_exc()) |
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30 #pure sync version |
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31 return ResultWrapper(task(*args, **kwargs)) |
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32 |
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33 |
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34 class LockTask(object): |
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35 """LockTask decorator""" |
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36 |
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37 def __init__(self, func): |
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38 self.func = func |
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39 |
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40 def __call__(self, func): |
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41 return decorator(self.__wrapper, func) |
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42 |
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43 def __wrapper(self, func, *fargs, **fkwargs): |
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44 params = [] |
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45 params.extend(fargs) |
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46 params.extend(fkwargs.values()) |
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47 lockkey = 'task_%s' % \ |
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48 md5(str(self.func) + '-' + '-'.join(map(str, params))).hexdigest() |
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49 log.info('running task with lockkey %s', lockkey) |
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50 try: |
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51 l = DaemonLock(lockkey) |
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52 return func(*fargs, **fkwargs) |
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53 l.release() |
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54 except LockHeld: |
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55 log.info('LockHeld') |
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56 return 'Task with key %s already running' % lockkey |
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57 |
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58 |
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59 |
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60 |
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61 |
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62 |
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63 |
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64 |
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65 |
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66 |