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1 #!/usr/bin/python2.5 |
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2 # |
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3 # Copyright 2009 the Melange authors. |
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4 # |
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5 # Licensed under the Apache License, Version 2.0 (the "License"); |
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6 # you may not use this file except in compliance with the License. |
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7 # You may obtain a copy of the License at |
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8 # |
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9 # http://www.apache.org/licenses/LICENSE-2.0 |
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10 # |
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11 # Unless required by applicable law or agreed to in writing, software |
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12 # distributed under the License is distributed on an "AS IS" BASIS, |
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13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 # See the License for the specific language governing permissions and |
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15 # limitations under the License. |
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16 |
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17 """Helpers functions for dealing with task queue api |
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18 """ |
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19 |
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20 __authors__ = [ |
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21 '"Daniel Hans" <daniel.m.hans@gmail.com>', |
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22 ] |
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23 |
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24 import logging |
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25 from django import http |
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26 |
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27 # TODO(labs): fix when taskqueue graduates from labs |
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28 from google.appengine.api.labs import taskqueue |
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29 |
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30 |
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31 class Error(Exception): |
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32 """Base class for all exceptions raised by this module. |
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33 """ |
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34 |
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35 pass |
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36 |
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37 |
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38 class FatalTaskError(Error): |
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39 """Class for all errors that lead to immediate task abortion. |
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40 """ |
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41 pass |
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42 |
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43 |
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44 def startTask(url, queue_name='default', context=None, **kwargs): |
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45 """Adds a new task to one of the queues |
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46 """ |
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47 |
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48 queue = taskqueue.Queue(name=queue_name) |
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49 return queue.add(taskqueue.Task(url=url, params=context)) |
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50 |
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51 |
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52 def terminateTask(): |
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53 """Generates http response which causes that the task is |
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54 is not added to the queue again |
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55 """ |
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56 |
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57 return http.HttpResponse(status=200) |
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58 |
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59 def repeatTask(): |
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60 """Generates http response which causes that the task is |
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61 added to the queue again |
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62 """ |
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63 |
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64 return http.HttpResponse(status=500) |