Andrea already indicated that you need to pass the featureSource to the map in
order to take advantage of the cache. It uses a spatial index internally to
make Query perform faster.
The CachingFeatureSource is good at grabbing data into the cache as needed; if
you know upfront that you can fit all your data into memory you can use a
different technique.
You may wish to consider another idea
-
http://docs.geotools.org/latest/userguide/library/main/collection.html#performance-options
SpatialIndexFeatureCollection (on the above page).
--
Jody Garnett
On Friday, 15 July 2011 at 8:53 PM, Emmanuel Blondel wrote:
> Dear all,
>
> I started using Geotools & I have some issue in using the
> CachingFeatureSource (presented here:
> http://geotoolsnews.blogspot.com/2010_04_01_archive.html)
> When I don't use the CachingFeatureSource, I can get all the features I
> want. If I use the cache, I don't get all features.
> Do you have any idea about how to solve this? You will find the code below.
>
> Thanks a lot in advance for your answers,
>
> Regards,
> Emmanuel
>
> Code:
>
> URL url = new URL( Constants.localGeoserverWFS );
> Map<String, Serializable> params = new HashMap<String, Serializable>();
> params.put(WFSDataStoreFactory.URL.key, url);
> params.put(WFSDataStoreFactory.TIMEOUT.key, new Integer(60000));
> params.put(WFSDataStoreFactory.MAXFEATURES.key, new Integer(200000));
> params.put(WFSDataStoreFactory.WFS_STRATEGY.key, "geoserver");
>
> DataStore store = DataStoreFinder.getDataStore(params);
>
> String typeName = "fao:t_statarea_csquare05_hseez_wgs84";
> SimpleFeatureSource featureSource = store.getFeatureSource(typeName);
>
> //Filter
> String textFilterEEZ ="geocode_1 IN('21','31') AND geocode_3 ='163'";
> Filter filterEEZ = ECQL.toFilter(textFilterEEZ);
> Query query = new Query( typeName, filterEEZ);
>
> //Cache
> CachingFeatureSource cacheFeatureSource = new
> CachingFeatureSource(featureSource);
> SimpleFeatureCollection features = cacheFeatureSource.getFeatures(query);
>
> //Default style
> StyleBuilder sb1 = new StyleBuilder();
> PolygonSymbolizer ps1 = sb1.createPolygonSymbolizer(new Color(185, 211,
> 238), new Color(58, 95, 205), 1);
> Style style = sb1.createStyle(ps1);
>
> //MapContext
> MapContext map = new DefaultMapContext();
> map.setTitle("Using cached features");
> map.addLayer(features, style);
> JMapFrame.showMap(map);
> --
> Emmanuel Blondel
> GIS Consultant
>
> Geographic Information Systems
> in Agronomy - Environment -Fisheries
> Email: [email protected] (mailto:[email protected]) -
> [email protected] (mailto:[email protected])
> Phone: +33 (0) 6 45 97 87 52
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> Secrets Revealed." This video shows you how to validate your ideas,
> optimize your ideas and identify your business strategy.
> http://p.sf.net/sfu/appsumosfdev2dev
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Secrets Revealed." This video shows you how to validate your ideas,
optimize your ideas and identify your business strategy.
http://p.sf.net/sfu/appsumosfdev2dev
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