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annotate doc/libervia-cli/pubsub_hook.rst @ 3732:0fac164ff2d8

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author Goffi <goffi@goffi.org>
date Mon, 31 Jan 2022 18:35:52 +0100
parents 21e7d46b988c
children
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1 .. _libervia-cli_pubsub_hook:
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2
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3 ====================================
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4 pubsub/hook: PubSub hooks management
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5 ====================================
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6
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7 ``hook`` is a subcommand grouping all PubSub commands related to hooks management. Hooks
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8 are user actions launched on specific events.
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9
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10 3 types of hooks can be used:
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11
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12 ``python``
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13 A Python module is expected as argument. The module must be available in Python path,
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14 and it must have a ``hook`` function.
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15
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16 ``python_file``
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17 A path to a Python script is expected as argument. The script must contain a ``hook``
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18 function.
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19
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20 ``python_code``
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21 Python code which will be directly executed. 3 variables will be set: ``host`` which
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22 contain the main Libervia instance, ``client`` which contain the session attached to the
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23 profile, and ``item`` which contain the item attached to the event.
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24
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25 .. note::
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27 Hooks are executed in Libervia context, and must be asynchronous. If they block, the whole
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28 Libervia execution will be blocked. They have access to everything, so don't run a code that
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29 you don't absolutely trust.
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31 .. note::
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33 Only ``python_file`` type is currently implemented
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35 .. note::
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36 Hook is an experimental feature, the way to use it may change in the future.
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37
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38 create
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39 ======
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40
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41 Create a hook of given type. Type is specified with ``-t {python,python_file,python_code},
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42 --type {python,python_file,python_code}`` and a positional arguments is expected, which
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43 depends on the chosen type.
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44
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45 By default the hook is temporary (it will be lost if the profile is disconnected), but you
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46 can make is persistent accross reconnexions if you use the ``-P, --persistent`` argument.
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47
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48 example
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49 -------
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51 Install a persistent hook on blog node, using the Python script named
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52 ``do_something_neat.py`` in ``$HOME`` directory::
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54 $ li pubsub node hook create -n urn:xmpp:microblog:0 -t python_file --persistent ~/do_something_neat.py
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56 delete
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57 ======
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58
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59 Delete one hook or all of them. To delete a hook, specify its type and argument (the that
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60 you have used with ``create``). If you use empty ``--type`` and ``--arg`` all hooks will
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61 be removed.
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63 example
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64 -------
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66 Delete the ``do_something_neat.py`` hook::
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68 $ li pubsub node hook delete -n urn:xmpp:microblog:0 -t python_file --arg ~/do_something_neat.py
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70 list
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71 ====
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73 List registered hooks. The output will give the following informations:
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75 service
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76 PubSub service on which the hook is attached.
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78 node
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79 PubSub node on which the hook is attached.
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81 type
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82 hook type
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84 arg
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85 hook arguments (dependant of hook type)
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86
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87 persistent
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88 boolean indicating is the hook persist accross sessions.
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89
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90 example
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91 -------
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92
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93 Get PubSub hooks registered for this profile in JSON::
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94
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95 $ li pubsub hook list -O json
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96