Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/QSectorArtifact.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> |
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date | Sun, 21 Apr 2013 12:48:09 +0200 |
parents | a2735a4bf75e |
children |
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package de.intevation.flys.artifacts; import java.util.ArrayList; import java.util.List; import org.apache.log4j.Logger; import org.w3c.dom.Document; import de.intevation.artifactdatabase.state.Facet; import de.intevation.artifacts.Artifact; import de.intevation.artifacts.ArtifactFactory; import de.intevation.artifacts.CallMeta; import de.intevation.artifacts.CallContext; import de.intevation.flys.artifacts.model.GaugeFinder; import de.intevation.flys.artifacts.model.GaugeFinderFactory; import de.intevation.flys.artifacts.model.GaugeRange; import de.intevation.flys.artifacts.model.NamedDouble; import de.intevation.flys.artifacts.services.FixingsKMChartService; import de.intevation.flys.artifacts.states.DefaultState; import de.intevation.flys.artifacts.resources.Resources; /** * Artifact to produce sector markers. */ public class QSectorArtifact extends StaticFLYSArtifact { /** The logger for this class. */ private static Logger logger = Logger.getLogger(QSectorArtifact.class); /** The name of the artifact. */ public static final String ARTIFACT_NAME = "qsector"; /** * Trivial Constructor. */ public QSectorArtifact() { logger.debug("QSectorArtifact.QSectorArtifact()"); } /** * Gets called from factory, to set things up. */ @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callMeta, Document data) { logger.debug("QSectorArtifact.setup"); super.setup(identifier, factory, context, callMeta, data); initialize(null, context, callMeta); } /** Return the name of this artifact. */ public String getName() { return ARTIFACT_NAME; } /** Get list of NamedDouble s (QSectors). */ public Object getQSectors(double km, CallContext context) { String river = getDataAsString("river"); List<NamedDouble> qsectors = new ArrayList<NamedDouble>(); GaugeFinderFactory ggf = GaugeFinderFactory.getInstance(); GaugeFinder gf = ggf.getGaugeFinder(river); if (gf == null) { logger.warn("No gauge finder found for river '" + river + "'"); return null; } GaugeRange gr = gf.find(km); if (gr == null) { logger.debug("No gauge range found for km " + km + " on river " + river + "."); return null; } if (logger.isDebugEnabled()) { logger.debug(gr); } for (int i = 0; i < FixingsKMChartService.I18N_Q_SECTOR_BOARDERS.length; ++i) { String key = FixingsKMChartService.I18N_Q_SECTOR_BOARDERS[i]; String def = FixingsKMChartService.DEFAULT_Q_SECTOR_BORDERS[i]; String label = Resources.getMsg(context.getMeta(), key, def); qsectors.add(new NamedDouble(label, gr.getSectorBorder(i))); } return qsectors; } /** Setup state and facet. */ @Override protected void initialize(Artifact artifact, Object context, CallMeta meta) { logger.debug("QSectorArtifact.initialize"); List<Facet> fs = new ArrayList<Facet>(); FLYSArtifact flys = (FLYSArtifact) artifact; importData(flys, "river"); DefaultState state = (DefaultState) getCurrentState(context); state.computeInit(this, hash(), context, meta, fs); if (!fs.isEmpty()) { logger.debug("Facets to add in QSectorArtifact.initialize ."); addFacets(getCurrentStateId(), fs); } else { logger.debug("No facets to add in QSectorArtifact.initialize (" + state.getID() + ")."); } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :