Mercurial > libervia-backend

annotate sat/tools/common/async_utils.py @ 3934:e345d93fb6e5

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plugin OXPS: OpenPGP for XMPP Pubsub implementation: OpenPGP for XMPP Pubsub (https://xmpp.org/extensions/inbox/pubsub-encryption.html, currently a protoXEP) is implemented and activated when `encrypted` is set to `True` in pubsub's `extra` data. On item retrieval, the decryption is transparent if the key is known, except if the `decrypt` key in `extra` is set to `False` (notably useful when one wants to checks that data is well encrypted). Methods and corresponding bridge methods have been implemented to manage shared secrets (to share, revoke or rotate the secrets). plugin XEP-0060's `XEP-0060_publish` trigger point as been move before actual publish so item can be modified (here e2ee) by the triggers. A new `XEP-0060_items` trigger point has also been added. `encrypted` flag can be used with plugin XEP-0277's microblog data rel 380
author Goffi <goffi@goffi.org>
date Sat, 15 Oct 2022 20:36:53 +0200
parents 9b45f0f168cf
children ebe45ea2df3b
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1 #!/usr/bin/env python3
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3
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4 # Libervia: an XMPP 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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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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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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20 """tools to launch process in a async way (using Twisted)"""
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21
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22 from collections import OrderedDict
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23 from typing import Optional, Callable, Awaitable
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24 from sat.core.log import getLogger
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27 log = getLogger(__name__)
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30 def async_lru(maxsize: Optional[int] = None) -> Callable:
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31 """Decorator to cache async function results using LRU algorithm"""
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32 def decorator(func: Callable) -> Callable:
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33 cache = OrderedDict()
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34 async def wrapper(*args) -> Awaitable:
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35 if args in cache:
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36 log.debug(f"using result in cache for {args}")
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37 cache.move_to_end(args)
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38 result = cache[args]
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39 return result
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40 log.debug(f"caching result for {args}")
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41 result = await func(*args)
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42 cache[args] = result
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43 if maxsize is not None and len(cache) > maxsize:
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44 value = cache.popitem(False)
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45 log.debug(f"Removing LRU value: {value}")
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46 return result
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47 return wrapper
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48 return decorator