Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/FixationArtifact.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 | b195fede1c3b |
children |
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package de.intevation.flys.artifacts; import de.intevation.artifacts.CallContext; import de.intevation.flys.artifacts.geom.Lines; import de.intevation.flys.artifacts.StaticWKmsArtifact; import de.intevation.flys.artifacts.model.CalculationResult; import de.intevation.flys.artifacts.model.WKms; import de.intevation.flys.artifacts.model.fixings.FixRealizingResult; import de.intevation.flys.artifacts.states.DefaultState.ComputeType; import de.intevation.flys.model.FastCrossSectionLine; import org.apache.log4j.Logger; /** * The default fixation analysis artifact. * * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> */ public class FixationArtifact extends FLYSArtifact implements WaterLineArtifact { /** The logger for this class. */ private static Logger logger = Logger.getLogger(FixationArtifact.class); /** The name of the artifact. */ public static final String ARTIFACT_NAME = "fixanalysis"; /* FacetActivity for this artifact is registered in FixAnalysisCompute . */ /** * The default constructor. */ public FixationArtifact() { logger.debug("ctor()"); } /** * Returns the name of the concrete artifact. * * @return the name of the concrete artifact. */ @Override public String getName() { return ARTIFACT_NAME; } @Override public Lines.LineData getWaterLines( int facetIdx, FastCrossSectionLine csl, double d, double w, CallContext context ) { FixRealizingResult result = (FixRealizingResult) ((CalculationResult)this.compute(context, ComputeType.ADVANCE, false)).getData(); WKms wkms = result.getWQKms()[facetIdx]; double km = csl.getKm(); // Find W at km. double wAtKm; wAtKm = StaticWKmsArtifact.getWAtKm(wkms, km); if (wAtKm == -1 || Double.isNaN(wAtKm)) { logger.warn("Waterlevel at km " + km + " unknown."); return new Lines.LineData(new double[][] {{}}, 0d, 0d); } // This should be FixRealizationResult, which can be getWQKms()ed return Lines.createWaterLines(csl.getPoints(), wAtKm); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :