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annotate doc/jp/pubsub_hook.rst @ 3120:0c29155ac68b

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core: backend autoconnection: A new Connection/autoconnect_backend param can be set for a profile or component to be started automatically with backend. This is specially useful for components, but can be useful for client profile too (e.g. on Android we need to start profile with backend to get notifications, this part will come with following commits). The new Sqlite.getIndParamValues method allows to retrieve the same parameters for all profiles.
author Goffi <goffi@goffi.org>
date Sat, 25 Jan 2020 21:08:32 +0100
parents 72583524cfd3
children
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1 .. _jp-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 subcommands 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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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 SàT 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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26
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27 Hooks are executed in SàT context, and must be asynchronous. If they block, the whole
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28 SàT 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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30
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31 .. note::
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32
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33 Only ``python_file`` type is currently implemented
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34
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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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50
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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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53
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54 $ jp pubsub node hook create -n urn:xmpp:microblog:0 -t python_file --persistent ~/do_something_neat.py
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55
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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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62
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63 example
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64 -------
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65
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66 Delete the ``do_something_neat.py`` hook::
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67
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68 $ jp pubsub node hook delete -n urn:xmpp:microblog:0 -t python_file --arg ~/do_something_neat.py
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69
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70 list
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71 ====
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72
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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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80
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81 type
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82 hook type
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83
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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 $ jp pubsub hook list -O json
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96