Mercurial > libervia-backend
view doc/libervia-cli/pubsub_attachments.rst @ 3941:036188fff714
plugin pubsub cache: avoid race condition by retrying node request:
When retrieving items, there may be a race condition if a node is not found in cache, then
created before `setPubsubNode` is called. This patch handle this case by retrying in case
of UNIQUE constraint violation.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sat, 15 Oct 2022 20:38:33 +0200 |
| parents | 8b76caa89aa0 |
| children |
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.. _libervia-cli_pubsub_attachments: ======================================================= pubsub/attachments: (Un)Attach Metadata to Pubsub Items ======================================================= ``attachments`` is a subcommand grouping all pubsub commands related to "pubsub attachments" specification. With them, you can (un)attach data to any pubsub item. This is notably used to handle data like saying if an item is (un)noticed, or add emoji reactions. get === Retrieve a list of all attached data to an item. By default all attachments of the item are returned, this can be filtered by using ``-j JIDS, --jid JIDS`` example ------- Louise check all attachments on her last blog post:: $ li pubsub attachments get -s louise@example.org -n urn:xmpp:microblog:0 -i some-news-acf0 set === Update or replace attachments. By default new attachments are updated, but if the ``-R, --replace`` is used, new attachments replace the whole former one where it make sense. For instance, ``-R`` doesn't change anything for ``noticed`` attachments, but it will replace all reactions (potentially with no reaction at all), where the default behaviour is to merge former and new reactions. Note that only specified attachments are affected, if unknown or unspecified attachments exist, they will stay unmodified. For now, only ``noticed`` (to say that an element has been seen and taken into account) and ``reactions`` (emojis to show emotion or other kind of reaction about something) are managed. ``-N [BOOLEAN], --noticed [BOOLEAN]`` takes on optional argument to say if the item is noticed or not. If the optional argument is not specified, if will be the same as if the ``true`` value was used. examples -------- Pierre wants to indicate to Louise that is has seen and he took into account her last blog post:: $ li pubsub attachments set -s louise@example.org -n urn:xmpp:microblog:0 -i some-news-acf0 -N Louise wants to react to Pierre blog post about night trains:: $ li pubsub attachments set -s pierre@example.net -n urn:xmpp:microblog:0 -i nigh-train-are-great-f120 -r 🚆🌜💤