Review Request: Fix crash caused by nested event-loops

[George Goldberg]

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http://git.reviewboard.kde.org/r/102139/
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Review request for Telepathy.


Summary
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This is not a full asyncification of the nepomuk service just yet - I'm doing it a bit at a time. However, the changes in this patch improve performance by only doing the query for accounts and contacts once, rather than each time and account and contact is constructed. They also improve performance by only writing changes to Nepomuk when the before is actually different to the after.

Coincidentally, this also fixes the problem where telepathy objects can process events when the Nepomuk query service nested event loop runs.


Diffs
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  nepomuk-storage.cpp 92780648c1624e72c8575b936de57e5447e1d793 
  tests/storage-test.cpp ed3d35c3c8720e6b01056f0407bc682c52eee6fd 

Diff: http://git.reviewboard.kde.org/r/102139/diff


Testing
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Unit tests still pass (with appropriate modification).


Thanks,

George

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