Mercurial > libervia-backend
annotate sat/tools/async_trigger.py @ 3153:2c7b42f53e9a
core (xmpp): avoid starting several clients at the same time:
a check is done to avoid running startConnection several times at once, which would lead
to the creation of several SatXMPPEntity instances at the same time, resulting in many
issues.
If startConnection is called while a previous one is not finished yet, a CancelError is
now raised.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Mon, 03 Feb 2020 13:46:24 +0100 |
| parents | 559a625a236b |
| children | c069882f64cb |
| rev | line source |
|---|---|
| 3028 | 1 #!/usr/bin/env python3 |
| 3137 | 2 |
| 2645 | 3 |
| 4 # SAT: a jabber client | |
| 3136 | 5 # Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org) |
| 2645 | 6 |
| 7 # This program is free software: you can redistribute it and/or modify | |
| 8 # it under the terms of the GNU Affero General Public License as published by | |
| 9 # the Free Software Foundation, either version 3 of the License, or | |
| 10 # (at your option) any later version. | |
| 11 | |
| 12 # This program is distributed in the hope that it will be useful, | |
| 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 # GNU Affero General Public License for more details. | |
| 16 | |
| 17 # You should have received a copy of the GNU Affero General Public License | |
| 18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | |
| 20 """Misc usefull classes""" | |
| 21 | |
| 22 from sat.tools import trigger as sync_trigger | |
| 23 from twisted.internet import defer | |
| 24 | |
| 25 class TriggerManager(sync_trigger.TriggerManager): | |
| 26 """This is a TriggerManager with an new asyncPoint method""" | |
| 27 | |
| 28 @defer.inlineCallbacks | |
| 29 def asyncPoint(self, point_name, *args, **kwargs): | |
| 30 """This put a trigger point with potentially async Deferred | |
| 31 | |
| 32 All the triggers for that point will be run | |
| 33 @param point_name: name of the trigger point | |
|
2650
3a8e7ec4648a
tools (trigger, async_trigger): added no_cancel argument to point and asyncPoint when a trigger must not be cancellable
Goffi <goffi@goffi.org>
parents:
2645
diff
changeset
|
34 @param *args: args to transmit to trigger |
|
3a8e7ec4648a
tools (trigger, async_trigger): added no_cancel argument to point and asyncPoint when a trigger must not be cancellable
Goffi <goffi@goffi.org>
parents:
2645
diff
changeset
|
35 @param *kwargs: kwargs to transmit to trigger |
|
3a8e7ec4648a
tools (trigger, async_trigger): added no_cancel argument to point and asyncPoint when a trigger must not be cancellable
Goffi <goffi@goffi.org>
parents:
2645
diff
changeset
|
36 if "triggers_no_cancel" is present, it will be popped out |
|
3a8e7ec4648a
tools (trigger, async_trigger): added no_cancel argument to point and asyncPoint when a trigger must not be cancellable
Goffi <goffi@goffi.org>
parents:
2645
diff
changeset
|
37 when set to True, this argument don't let triggers stop |
|
3a8e7ec4648a
tools (trigger, async_trigger): added no_cancel argument to point and asyncPoint when a trigger must not be cancellable
Goffi <goffi@goffi.org>
parents:
2645
diff
changeset
|
38 the workflow |
| 2645 | 39 @return D(bool): True if the action must be continued, False else |
| 40 """ | |
| 41 if point_name not in self.__triggers: | |
| 42 defer.returnValue(True) | |
| 43 | |
|
2650
3a8e7ec4648a
tools (trigger, async_trigger): added no_cancel argument to point and asyncPoint when a trigger must not be cancellable
Goffi <goffi@goffi.org>
parents:
2645
diff
changeset
|
44 can_cancel = not kwargs.pop('triggers_no_cancel', False) |
|
3a8e7ec4648a
tools (trigger, async_trigger): added no_cancel argument to point and asyncPoint when a trigger must not be cancellable
Goffi <goffi@goffi.org>
parents:
2645
diff
changeset
|
45 |
| 2645 | 46 for priority, trigger in self.__triggers[point_name]: |
| 47 try: | |
| 48 cont = yield trigger(*args, **kwargs) | |
|
2650
3a8e7ec4648a
tools (trigger, async_trigger): added no_cancel argument to point and asyncPoint when a trigger must not be cancellable
Goffi <goffi@goffi.org>
parents:
2645
diff
changeset
|
49 if can_cancel and not cont: |
| 2645 | 50 defer.returnValue(False) |
| 51 except sync_trigger.SkipOtherTriggers: | |
| 52 break | |
| 53 defer.returnValue(True) |