[Sugar-devel] Call for testing and feedback: alternative Journal implementation

[Eduardo H. Silva]

2012/5/9 Eduardo H. Silva <hoboprimate at gmail.com>:
> 2012/5/9 Eduardo H. Silva <hoboprimate at gmail.com>:
>> 2012/5/9 Christophe Guéret <c.d.m.gueret at vu.nl>:
>>> Dear all,
>>>
>>> A part of the project "SemanticXO" concerns the implementation of an
>>> alternative Journal implementation making use of the triple store backend.
>>> Triple store are data bases optimised to store factual information in the
>>> form of statements linking a subject, a property and a value. This makes
>>> them particularly fit to store key/value metadata, such as the one the
>>> Journal uses. The feature proposal for SemanticXO gives more detailled
>>> about what this is about: http://wiki.sugarlabs.org/go/Features/Semantic_Web
>>>
>>> I've just finished removing a couple of bugs and would be interested in
>>> getting a first round of feedback.
>>> The installation procedure is not super convenient but should be manageable
>>> anyway: http://wiki.sugarlabs.org/go/Features/Semantic_Web/Testing
>>>
>>> The code is based on two parts:
>>> * a module "common" that allows to store arbitrary data in the triple store
>>> * a module "datastore" which uses "common" to store the data from the
>>> Journal
>>> I'm now working on implementing other usage examples for "common". In the
>>> Journal, the most visible change is the possibility to browse the content
>>> through the SPARQL interface of the triple store. This means it is possible,
>>> and rather easy, to gather statistics about the activities performed in a
>>> class room or do backup of the metadata without having to interupt any other
>>> activity.
>>>
>>> Looking forward to your feedback, cheers,
>>> Christophe
>>>
>>>
>>> _______________________________________________
>>> Sugar-devel mailing list
>>> Sugar-devel at lists.sugarlabs.org
>>> http://lists.sugarlabs.org/listinfo/sugar-devel
>>>
>>
>> Hi,
>> Followed the steps in the wiki page. At the last step, sugar-emulator
>> crashes when launching. This is running sugar 0.96.1 in Fedora 17. I
>> renamed ~/.sugar to another name before launching sugar-emulator:
>>
>> ** (process:21449): WARNING **: Trying to register gtype
>> 'GMountMountFlags' as enum when in fact it is of type 'GFlags'
>>
>> ** (process:21449): WARNING **: Trying to register gtype
>> 'GDriveStartFlags' as enum when in fact it is of type 'GFlags'
>>
>> ** (process:21449): WARNING **: Trying to register gtype
>> 'GSocketMsgFlags' as enum when in fact it is of type 'GFlags'
>> Gtk-Message: Failed to load module "pk-gtk-module"
>> GNOME_KEYRING_CONTROL=/run/user/jobezone/keyring-rHyu00
>> GNOME_KEYRING_PID=21469
>>
>> ** (process:21456): WARNING **: Trying to register gtype
>> 'GMountMountFlags' as enum when in fact it is of type 'GFlags'
>>
>> ** (process:21456): WARNING **: Trying to register gtype
>> 'GDriveStartFlags' as enum when in fact it is of type 'GFlags'
>>
>> ** (process:21456): WARNING **: Trying to register gtype
>> 'GSocketMsgFlags' as enum when in fact it is of type 'GFlags'
>> ** Message: pygobject_register_sinkfunc is deprecated (HippoCanvasBox)
>> Traceback (most recent call last):
>>  File "/usr/bin/sugar-session", line 289, in <module>
>>    main()
>>  File "/usr/bin/sugar-session", line 228, in main
>>    from jarabe.desktop import homewindow
>>  File "/usr/lib/python2.7/site-packages/jarabe/desktop/homewindow.py",
>> line 25, in <module>
>>    from jarabe.desktop.meshbox import MeshBox
>>  File "/usr/lib/python2.7/site-packages/jarabe/desktop/meshbox.py",
>> line 48, in <module>
>>    from jarabe.journal import misc
>>  File "/usr/lib/python2.7/site-packages/jarabe/journal/misc.py", line
>> 26, in <module>
>>    from sugar.activity import activityfactory
>>  File "/usr/lib/python2.7/site-packages/sugar/activity/activityfactory.py",
>> line 34, in <module>
>>    from sugar.datastore import datastore
>>  File "/usr/lib/python2.7/site-packages/sugar/datastore/datastore.py",
>> line 77, in <module>
>>    _get_data_store()
>>  File "/usr/lib/python2.7/site-packages/sugar/datastore/datastore.py",
>> line 51, in _get_data_store
>>    DS_DBUS_PATH),
>>  File "/usr/lib/python2.7/site-packages/dbus/bus.py", line 244, in get_object
>>    follow_name_owner_changes=follow_name_owner_changes)
>>  File "/usr/lib/python2.7/site-packages/dbus/proxies.py", line 241, in __init__
>>    self._named_service = conn.activate_name_owner(bus_name)
>>  File "/usr/lib/python2.7/site-packages/dbus/bus.py", line 183, in
>> activate_name_owner
>>    self.start_service_by_name(bus_name)
>>  File "/usr/lib/python2.7/site-packages/dbus/bus.py", line 281, in
>> start_service_by_name
>>    'su', (bus_name, flags)))
>>  File "/usr/lib/python2.7/site-packages/dbus/connection.py", line
>> 630, in call_blocking
>>    message, timeout)
>> dbus.exceptions.DBusException:
>> org.freedesktop.DBus.Error.Spawn.ChildExited: Process
>> /usr/bin/datastore-service exited with status 1
>> g_dbus_connection_real_closed: Remote peer vanished with error:
>> Underlying GIOStream returned 0 bytes on an async read
>> (g-io-error-quark, 0). Exiting.
>> Aviso do gestor de janelas: Erro IO fatal 11 (Resource temporarily
>> unavailable) no ecrã ':30'.
>>
>> This last line translates to:
>> TRANS:window manager warning: [...] in screen':30'.]
>>
>> Eduardo
>
> Ah, the error actually starts with /usr/bin/sugar-datastore (which I
> replaced with the one included in the semanticXO directory):
>
> datastore-service:13:<module>:ImportError: No module named
> semanticstore.datastore
>
> Eduardo

I have a question, could activities add new entries to the semantic
datastore? For example, Paint and Write when installed would add these
items:

Painted a picture of,IsActionOf,Paint
Wrote,IsActionOf,Write

Then you could use this information to be used in the Diary-like view
of the Journal (http://wiki.sugarlabs.org/go/Design_Team/Designs/Journal):

Wrote History of Thailand
Painted a picture of Our school

And how would you relate objects to get to this:

Wrote History of Thailand with John, Susan 3 days ago.

I really like this idea, and wish I could make it happen (I don't know
much programming).

Eduardo