annotate libervia/backend/tools/async_trigger.py @ 4118:07370d2a9bde

plugin XEP-0167: keep media order when starting a call: media content order is relevant when building Jingle contents/SDP notably for bundling. This patch fixes the previous behaviour of always using the same order by keeping the order of the data (i.e. order of original SDP offer). Previous behaviour could lead to call failure. rel 424
author Goffi <goffi@goffi.org>
date Tue, 03 Oct 2023 15:15:24 +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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26
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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