[postgis-users] Persistente of Jdbc Connection
Noredine Berrached
nberrached at yahoo.com
Thu Apr 13 03:11:00 PDT 2006
Hi!
I've already test that closing the connectionPool, the
problem is that the next time that the periodic task
run, I've got an SQLexception "Connection is closed".
I think that I have to configure the connection to
close automatically, but I don't kno how.
--- Nicolas Ribot <nicky666 at gmail.com> a écrit :
> Hi Noredine,
>
> I assume you are using GeoTools to access Postgis.
> Did you try to explicitely close your JDBC
> connection, by asking the
> connectionPoolManager to do so in a finally block,
> somethinh like:
> ...
> ConnectionPoolManager.getInstance().closeAll();
> ...
> Nicolas
>
> On 4/13/06, Noredine Berrached
> <nberrached at yahoo.com> wrote:
> > Hi everyone,
> > I've got a problem with my application (on Fedora
> core
> > 4, postgresql serveur 8.0.7, postgis 1.1.1), I
> launch
> > a periodic task with the Java Object TimerTask
> every
> > two seconds, to change the style of the visible
> > objects of the visible layer. The color change to
> > green to red, and the next time red to green.
> > The problem is that at each change of style, my
> > application open one or more a connection to the
> > server and never close it, then after a while a
> java
> > exception appears "too many clients connected".
> > How can I manage the connections?
> > this the code that I use to connect to the server,
> I
> > store the layer in a Vector:
> > //the connection parameters->
> > String database;
> > String namespace =(String)params.get("namespace");
> > String host = (String)params.get("host");
> > int port =
> ((Integer)params.get("port")).intValue();
> > String dbname = (String)params.get("database");
> > String schema = (String)params.get("schema");
> > String user = (String)params.get("user");
> > String password =(String)params.get("password");
> > factory = new PostgisConnectionFactory(host, port,
> > dbname);
> > JDBCDataStoreConfig config =
> >
>
JDBCDataStoreConfig.createWithNameSpaceAndSchemaName(
> > namespace, schema );
> >
> > //new connectionPool->
> > pool = factory.getConnectionPool(user, password);
> > //new DataStore->
> > pgDatastore = new PostgisDataStore(pool, config,
> > PostgisDataStore.OPTIMIZE_SAFE);
> > m_vect_feature_source = new Vector();
> > FeatureSource fsRoads =
> > pgDatastore.getFeatureSource("roads");
> > FeatureSource fsStreams =
> > pgDatastore.getFeatureSource("streams");
> > FeatureSource fsBugs =
> > pgDatastore.getFeatureSource("bugsites");
> > FeatureSource fsArch =
> > pgDatastore.getFeatureSource("archsites");
> > FeatureSource fsRestricted =
> > pgDatastore.getFeatureSource("rstrct");
> >
> > m_vect_feature_source.add(fsRoads);
> > m_vect_feature_source.add(fsStreams);
> > m_vect_feature_source.add(fsBugs);
> > m_vect_feature_source.add(fsArch);
> > m_vect_feature_source.add(fsRestricted);
> >
> > Here is the code that the periodic task uses :
> > //first I store the visible object in a
> FeatureResults
> > with a Filter
> > ...(too long)
> > //storage of the identifier in a Vector, and swap
> of
> > the color ->
> > FeatureResults fr =
> fsRestricted.getFeatures(filt);
> > if (fr.getCount() == 0)
> > {
> > System.out.println("No feature selected.");
> > }else{
> > FeatureReader reader = fr.reader();
> > Feature f = null;
> > Vector vec_ident_feature = new Vector();
> > while (reader.hasNext())
> > {
> > f = (Feature) reader.next();
> > vec_ident_feature.add(f.getAttribute(0));
> > }
> > FeatureType ft_typ = f.getFeatureType() ;
> > if(state==1)
> > setColorOnDeterminedFeature(ft_typ,
> > ft_typ.getAttributeType(0).getName(),
> >
>
defaultStyle,vec_ident_feature,colorTrue,colorFalse);
> > else
> > setColorOnDeterminedFeature(ft_typ,
> > ft_typ.getAttributeType(0).getName(),
> >
>
defaultStyle,vec_ident_feature,colorFalse,colorTrue);
> > state = 1 - state;
> > }
> >
> > Finally the function that applicates a style on
> the
> > selected objects :
> > GeometryAttributeType l_geom_attrib_type =
> > ft_type_source.getDefaultGeometry();
> > StyleBuilder sb = new StyleBuilder();
> > Style mapStyle = null;
> > Style mapStyle_2 = null;
> > Long l_val;
> > long val_orig, val_calc;
> > try
> > {
> > StyleFactory styleFactory =
> > StyleFactory.createStyleFactory();
> > mapStyle = styleFactory.createStyle();
> > //the "true Style" depends of true Color
> > Mark markTrue =
> > sb.createMark(StyleBuilder.MARK_CIRCLE, colorTrue,
> > colorFalse, 1);
> > Graphic graphicsTrue = sb.createGraphic(null,
> > markTrue, null);
> > PointSymbolizer pointTrue=
> > sb.createPointSymbolizer(graphicsTrue);
> > //the "false Style" depends of False Color
> > Mark markFalse =
> > sb.createMark(StyleBuilder.MARK_CIRCLE,
> colorFalse,
> > colorTrue, 1);
> > Graphic graphicFalse = sb.createGraphic(null,
> > markFalse, null);
> > PointSymbolizer pointFalse=
> > sb.createPointSymbolizer(graphicFalse);
> >
> > FilterFactory filterFactory =
> > FilterFactory.createFilterFactory();
> > CompareFilter filter = null;
> > FeatureTypeStyle fts = null;
> > Rule rule_other;
> > for(int i=0;i<vec_ident_feature.size();i++)
> > {
> > try
> > {
> > filter =
> >
>
filterFactory.createCompareFilter(CompareFilter.COMPARE_EQUALS);
> >
> >
>
filter.addLeftValue(filterFactory.createAttributeExpression(ft_type_source,ft_ident));
> >
> > l_val =
> > (Long)vec_ident_feature.get(i);
> > val_orig =
> l_val.longValue();
> > val_calc= (val_orig/2)*2;
> >
> >
> >
>
filter.addRightValue(filterFactory.createLiteralExpression(val_orig));
> >
> //System.out.println("val_orig
> > :"+val_orig+" val_calc :"+val_calc + "ft_ident
> > :"+ft_ident+ (Long)vec_ident_feature.get(i));
> > if(val_orig==val_calc)
> > {
> >
> > rule_other =
> > sb.createRule(pointTrue);
> > }else{
> > rule_other =
> > sb.createRule(pointFalse);
> > }
> >
> rule_other.setFilter(filter);
> > if(fts==null)
> > fts =
> > sb.createFeatureTypeStyle(null, rule_other);
> > else
> >
> fts.addRule(rule_other);
> > }
> > catch (IllegalFilterException
> e)
> > {
> > e.printStackTrace();
> > }
> > }
> >
> > //valeur indeterminé, style par
> defaut
> > /*{
> > Mark markFalse =
> > sb.createMark(StyleBuilder.MARK_CIRCLE,
> colorFalse,
> > colorTrue, 1);
> > Graphic graphicFalse =
> > sb.createGraphic(null, markFalse, null);
> > PointSymbolizer pointFalse=
> > sb.createPointSymbolizer(graphicFalse);
> >
> > Rule ruleFalse =
> > sb.createRule(pointFalse);
> > //StyleVisitor
> >
> ruleFalse.setIsElseFilter(true);
> > ruleFalse.setName("Color
> False");
> > fts.addRule(ruleFalse);
> > }*/
> >
> > Style sty =
> > styleFactory.createStyle();
> > sty.addFeatureTypeStyle(fts);
> >
> >
>
//m_styled_map_pane.getMapContext().getLayer(2).setStyle(sty);
> > m_map_layer.setStyle(sty);
> > //m_styled_map_pane.updateUI();
> >
> //mapStyle.addFeatureTypeStyle(fts);
> > }
> > catch( Exception e )
> > {
> > e.printStackTrace();
> > }
> >
> >
> >
> >
> >
> >
> >
>
___________________________________________________________________________
> > Faites de Yahoo! votre page d'accueil sur le web
> pour retrouver directement vos services préférés :
> vérifiez vos nouveaux mails, lancez vos recherches
> et suivez l'actualité en temps réel.
> > Rendez-vous sur http://fr.yahoo.com/set
> > _______________________________________________
> > postgis-users mailing list
> > postgis-users at postgis.refractions.net
> >
>
http://postgis.refractions.net/mailman/listinfo/postgis-users
> >
> _______________________________________________
> postgis-users mailing list
> postgis-users at postgis.refractions.net
>
http://postgis.refractions.net/mailman/listinfo/postgis-users
>
___________________________________________________________________________
Faites de Yahoo! votre page d'accueil sur le web pour retrouver directement vos services préférés : vérifiez vos nouveaux mails, lancez vos recherches et suivez l'actualité en temps réel.
Rendez-vous sur http://fr.yahoo.com/set
More information about the postgis-users
mailing list