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annotate libervia/backend/tools/async_trigger.py @ 4281:9e63e02318ec

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core: show warning instead of exception in case of missing dependency when loading plugins
author Goffi <goffi@goffi.org>
date Fri, 12 Jul 2024 18:53:00 +0200
parents 0d7bb4df2343
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2
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3
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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
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24 from libervia.backend.core.xmpp import SatXMPPEntity
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25 from . import trigger as sync_trigger
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26 from . import utils
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27 from twisted.internet import defer
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28
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29
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30 class TriggerManager(sync_trigger.TriggerManager):
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31 """This is a TriggerManager with an new async_point method"""
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32
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33 async def async_point(self, point_name: str, *args, **kwargs) -> bool:
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34 """This put a trigger point with potentially async Deferred
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35
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36 All the triggers for that point will be run
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37 @param point_name: name of the trigger point
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38 @param *args: args to transmit to trigger
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39 @param *kwargs: kwargs to transmit to trigger
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40 if "triggers_no_cancel" is present, it will be popped out
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41 when set to True, this argument don't let triggers stop
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42 the workflow
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43 @return D(bool): True if the action must be continued, False else
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44 """
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45 if point_name not in self.__triggers:
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46 return True
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47
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48 can_cancel = not kwargs.pop("triggers_no_cancel", False)
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49
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50 for __, trigger in self.__triggers[point_name]:
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51 try:
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52 cont = await utils.as_deferred(trigger, *args, **kwargs)
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53 if can_cancel and not cont:
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54 return False
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55 except sync_trigger.SkipOtherTriggers:
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56 break
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57 return True
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58
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59 async def async_return_point(
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60 self, point_name: str, *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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65
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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