Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/HYKArtifact.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.artifacts.Artifact; import de.intevation.artifacts.ArtifactFactory; import de.intevation.artifacts.CallMeta; import de.intevation.flys.artifacts.states.DefaultState; import de.intevation.artifactdatabase.state.Facet; import de.intevation.artifactdatabase.state.FacetActivity; /** * Artifact to get hydr zones (HYKs). */ public class HYKArtifact extends StaticFLYSArtifact { /** Name of Artifact. */ public static final String HYK_ARTIFACT_NAME = "hyk"; /** Name of data item keeping the hyk id to load formations from. */ public static final String HYK_ID = "hyk_artifact.data.id"; /** Name of data item keeping the km of cs master. */ public static final String HYK_KM = "hyk_artifact.data.km"; /** Own logger. */ private static final Logger logger = Logger.getLogger(HYKArtifact.class); static { // TODO: Move to configuration. FacetActivity.Registry.getInstance() .register(HYK_ARTIFACT_NAME, FacetActivity.INACTIVE); } /** Return given name. */ @Override public String getName() { return HYK_ARTIFACT_NAME; } /** Store ids, do super.setup. */ @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callMeta, Document data) { logger.info("HYKArtifact.setup"); String ids = getDatacageIDValue(data); logger.info("HYKArtifact.setup: id is " + ids); addStringData(HYK_ID, ids); super.setup(identifier, factory, context, callMeta, data); } /** Set km as Data. */ public void setKm(double km) { addStringData(HYK_KM, Double.toString(km)); } /** Get km from state data. */ public double getKm() { Double km = getDataAsDouble(HYK_KM); if (km == null) { // XXX returning 0 is to be compatible to older versions that had an // own method getDataAsDouble that returned 0 if parsing the // parameter failed. return 0; } else { return km; } } /** Get hyk-id from state data. */ public int getHykId() { return getDataAsInteger(HYK_ID); } /** Do not copy data from daddyfact. */ @Override protected void initialize( Artifact artifact, Object context, CallMeta callMeta) { logger.debug("HYKArtifact.initialize"); importData((FLYSArtifact)artifact, "river"); List<Facet> fs = new ArrayList<Facet>(); DefaultState state = (DefaultState) getCurrentState(context); state.computeInit(this, hash(), context, callMeta, fs); if (!fs.isEmpty()) { logger.debug("Facets to add in HYKArtifact.initialize ."); addFacets(getCurrentStateId(), fs); } else { logger.debug("No facets to add in HYKArtifact.initialize (" + state.getID() + ")."); } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :