Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/WMSQPSArtifact.java @ 5779:ebec12def170
Datacage: Add a pool of builders to make it multi threadable.
XML DOM is not thread safe. Therefore the old implementation only allowed one thread
to use the builder at a time. As the complexity of the configuration
has increased over time this has become a bottleneck of the whole application
because it took quiet some time to build a result. Furthermore the builder code path
is visited very frequent. So many concurrent requests were piled up
resulting in long waits for the users.
To mitigate this problem a round robin pool of builders is used now.
Each of the pooled builders has an independent copy of the XML template
and can be run in parallel.
The number of builders is determined by the system property
'flys.datacage.pool.size'. It defaults to 4.
author | Sascha L. Teichmann <teichmann@intevation.de> |
---|---|
date | Sun, 21 Apr 2013 12:48:09 +0200 |
parents | 948a106bc4cd |
children |
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package de.intevation.flys.artifacts; import java.util.List; import org.w3c.dom.Document; import org.apache.log4j.Logger; import com.vividsolutions.jts.geom.Envelope; import de.intevation.artifacts.ArtifactFactory; import de.intevation.artifacts.CallMeta; import de.intevation.artifactdatabase.state.DefaultOutput; import de.intevation.artifactdatabase.state.Facet; import de.intevation.artifactdatabase.state.State; import de.intevation.flys.model.River; import de.intevation.flys.model.CrossSectionTrack; import de.intevation.flys.artifacts.model.FacetTypes; import de.intevation.flys.artifacts.model.RiverFactory; import de.intevation.flys.utils.FLYSUtils; import de.intevation.flys.utils.GeometryUtils; public class WMSQPSArtifact extends WMSDBArtifact { public static final String NAME = "qps"; private static final Logger logger = Logger.getLogger(WMSQPSArtifact.class); @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callMeta, Document data) { logger.debug("WMSQPSArtifact.setup"); super.setup(identifier, factory, context, callMeta, data); } @Override public String getName() { return NAME; } @Override public State getCurrentState(Object cc) { State s = new WMSQPSState(this); List<Facet> fs = getFacets(getCurrentStateId()); DefaultOutput o = new DefaultOutput( "floodmap", "floodmap", "image/png", fs, "map"); s.getOutputs().add(o); return s; } public static class WMSQPSState extends WMSDBState implements FacetTypes { private static final Logger logger = Logger.getLogger(WMSQPSState.class); public WMSQPSState(WMSDBArtifact artifact) { super(artifact); } @Override protected String getFacetType() { return FLOODMAP_QPS; } @Override protected String getUrl() { return FLYSUtils.getUserWMSUrl(artifact.identifier()); } @Override protected String getSrid() { River river = RiverFactory.getRiver(getRiverId()); return FLYSUtils.getRiverSrid(river.getName()); } @Override protected Envelope getExtent(boolean reproject) { River river = RiverFactory.getRiver(getRiverId()); List<CrossSectionTrack> qps; String kind = getIdPart(2); if (kind != null && kind.equals("1")) { qps = CrossSectionTrack.getCrossSectionTrack(river.getName(), Integer.parseInt(kind)); } else if (kind != null) { qps = CrossSectionTrack.getCrossSectionTrack(river.getName(), getName(), Integer.parseInt(kind)); } else { qps = CrossSectionTrack.getCrossSectionTrack(river.getName(), getName()); } Envelope max = null; for (CrossSectionTrack qp: qps) { Envelope env = qp.getGeom().getEnvelopeInternal(); if (max == null) { max = env; continue; } max.expandToInclude(env); } return max != null && reproject ? GeometryUtils.transform(max, getSrid()) : max; } @Override protected String getFilter() { String kind = getIdPart(2); if (kind != null && kind.equals("1")) { // There can be several layers named qps that differ in kind return "river_id=" + String.valueOf(getRiverId()) + " AND kind_id=" + kind; } else if (kind != null) { return "river_id=" + String.valueOf(getRiverId()) + " AND kind_id=" + kind + " AND name='" + getName() + "'"; } return "river_id=" + String.valueOf(getRiverId()) + " AND name='" + getName() + "'"; } @Override protected String getDataString() { String srid = getSrid(); if (FLYSUtils.isUsingOracle()) { return "geom FROM cross_section_tracks USING SRID " + srid; } else { return "geom FROM cross_section_tracks " + "USING UNIQUE id USING SRID " + srid; } } @Override protected String getGeometryType() { return "LINE"; } } // end of WMSQPSState } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :