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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