[udig-devel] [jira] Created: (UDIG-1367) StyleThemePage needs to be more smart with classification

[Vitali Diatchkov (JIRA)]

StyleThemePage needs to be more smart with classification
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                 Key: UDIG-1367
                 URL: http://jira.codehaus.org/browse/UDIG-1367
             Project: uDIG
          Issue Type: Improvement
          Components: style
    Affects Versions: UDIG 1.1-RC14
         Environment: 1.1.x branch, latest update of sld plugin.
            Reporter: Vitali Diatchkov
            Assignee: Cory Horner


StyleThemePage performs classification calculations based on analysis of attribute values.  If WFSDataStore-managed georesource contains 5700 features coming from PostGIS as a backend then calculation takes 15-20 seconds (loading and parsing XML output from WFS) in StyleThemePage.  In Oracle database of our customers there are about 2000000 land parcel polygons.. 

BusyIndicator.showWhile(Display.getCurrent(), genDefault)  is not enough. For the avoiding blocking of Display thread and UDIG UI in described cases during calculations based on traversing of the whole data set IProgressMonitor-based solution is desired as quick workaround, at least. - with an option to cancel process of classification.

Possible plan:
1) Find and analyze bottlenecks where FeatureCollection is traversed.
2) Organize workflow execution of these places in a separate thread with monitoring and canceling functionality.

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