Hi,
I am using geotools 14.4. I also wonder why no map is shown at all after the
massage appeared.
Best
Julian
>>>
Von: Ian Turton <[email protected]>
An:Julian Hagenauer <[email protected]>
CC:geotools-users <[email protected]>
Datum: 11.07.2016 11:42
Betreff: Re: [Geotools-gt2-users] MapContent dispose() seems not to work
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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