which version of GeoTools are you using? I'm pretty sure we fixed this
(bogus) warning at last years FOSS4G code sprint.
Ian
On 11 July 2016 at 08:05, Julian Hagenauer <[email protected]> wrote:
> Hello,
>
> I wrote a small test application which updates the MapContent of a
> JMapPane several times in sequence. Almost always I get the following
> warning/error message:
>
> Jul 11, 2016 8:25:58 AM org.geotools.map.MapContent finalize
> SCHWERWIEGEND: Call MapContent dispose() to prevent memory leaks
>
> Why that? I actually call dispose every time before I set the MapContent.
> Probably I am updating the JMapPane in a wrong way? Or maybe there it is
> necessary to do some synchronization?
>
> Thanks
> Julian
>
> Here is the small test program to reproduce the warning/error:
>
> public class JMapPaneTest extends JFrame {
>
> public JMapPane mp;
>
> public JMapPaneTest() {
> mp = new JMapPane();
> mp.setRenderer(new StreamingRenderer());
> mp.setMapContent(new MapContent());
>
> add(mp);
> setSize(400,400);
> setVisible(true);
> }
>
> public void updateMP() {
> GeometryFactory gf = new GeometryFactory();
> SimpleFeatureTypeBuilder typeBuilder = new SimpleFeatureTypeBuilder();
> typeBuilder.setName("Points");
> typeBuilder.add("the_geom",Point.class);
>
> SimpleFeatureBuilder featureBuilder = new
> SimpleFeatureBuilder(typeBuilder.buildFeatureType());
> Random r = new Random();
> DefaultFeatureCollection fc = new DefaultFeatureCollection();
> for( int i = 0; i < 1000; i++ ) {
> Point p = gf.createPoint(new Coordinate(r.nextDouble(),r.nextDouble()));
> featureBuilder.set("the_geom", p);
> fc.add( featureBuilder.buildFeature(""+fc.size()));
> }
>
> MapContent mc = new MapContent();
> Symbolizer sym = new StyleBuilder().createPointSymbolizer();
> mc.addLayer(new FeatureLayer(fc, SLD.wrapSymbolizers(sym)));
> mc.setViewport( new MapViewport(fc.getBounds()));
> mp.getMapContent().dispose();
> mp.setMapContent(mc);
> }
>
> public static void main(String[] args) {
> JMapPaneTest t = new JMapPaneTest();
> for( int i = 0; i < 1000; i++)
> t.updateMP();
> System.exit(1);
> }
> }
>
>
>
>
>
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--
Ian Turton
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