annotate libervia/backend/tools/async_trigger.py @ 4079:10b6ad569157

version: use standard Python's `dev0` instead of Libervia specific `D` for dev version
author Goffi <goffi@goffi.org>
date Tue, 06 Jun 2023 12:41:53 +0200
parents 4b842c1fb686
children e11b13418ba6
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1 #!/usr/bin/env python3
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2
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 """Misc usefull classes"""
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21
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22 from typing import Tuple, Any
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23 from . import trigger as sync_trigger
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24 from . import utils
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25 from twisted.internet import defer
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27 class TriggerManager(sync_trigger.TriggerManager):
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28 """This is a TriggerManager with an new async_point method"""
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29
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30 @defer.inlineCallbacks
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31 def async_point(self, point_name, *args, **kwargs):
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32 """This put a trigger point with potentially async Deferred
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33
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34 All the triggers for that point will be run
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35 @param point_name: name of the trigger point
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36 @param *args: args to transmit to trigger
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37 @param *kwargs: kwargs to transmit to trigger
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38 if "triggers_no_cancel" is present, it will be popped out
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39 when set to True, this argument don't let triggers stop
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40 the workflow
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41 @return D(bool): True if the action must be continued, False else
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42 """
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43 if point_name not in self.__triggers:
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44 defer.returnValue(True)
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45
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46 can_cancel = not kwargs.pop('triggers_no_cancel', False)
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47
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48 for priority, trigger in self.__triggers[point_name]:
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49 try:
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50 cont = yield utils.as_deferred(trigger, *args, **kwargs)
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51 if can_cancel and not cont:
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52 defer.returnValue(False)
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53 except sync_trigger.SkipOtherTriggers:
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54 break
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55 defer.returnValue(True)
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56
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57 async def async_return_point(
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58 self,
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59 point_name: str,
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60 *args, **kwargs
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61 ) -> Tuple[bool, Any]:
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62 """Async version of return_point"""
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63 if point_name not in self.__triggers:
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64 return True, None
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66 for priority, trigger in self.__triggers[point_name]:
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67 try:
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68 cont, ret_value = await utils.as_deferred(trigger, *args, **kwargs)
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69 if not cont:
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70 return False, ret_value
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71 except sync_trigger.SkipOtherTriggers:
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72 break
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73 return True, None
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74