Dataengines in native runners

[Aaron J. Seigo]

On Sunday, July 3, 2011 20:33:46 Nicolas Alvarez wrote:
> Is there any native-code krunner that uses a dataengine to get its
> information? It seems odd that, for example, we have a perfectly good
> 'places' dataengine but the runner accesses KFilePlacesModel directly
> instead. Same for activities and windows.

the reason is two fold:

* DataEngine and Runner represent the resulting data rather differently and 
offering very different options as to what can be done with the results. iow, 
the use cases are fundamentally different. using one from the other, while 
possible, is therefore always going to be more awkward than simply using a 
shared implementation for getting to the actual data.

* DataEngines are not required to be thread safe, and Plasma::DataEngine 
itself is not thread safe. Runners are by design threaded. so either we make 
DataEngine(s) more complicated for little gain, or Runners have to manage the 
locking (and accessing of the DataEngine from the main thread) themselves.

hth..

-- 
Aaron J. Seigo
humru othro a kohnu se
GPG Fingerprint: 8B8B 2209 0C6F 7C47 B1EA  EE75 D6B7 2EB1 A7F1 DB43

KDE core developer sponsored by Qt Development Frameworks
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