Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/BedHeightsArtifact.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 | cd44d28d0fbc |
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.DefaultOutput; import de.intevation.artifactdatabase.state.Facet; import de.intevation.artifactdatabase.state.FacetActivity; import de.intevation.artifacts.ArtifactFactory; import de.intevation.artifacts.Artifact; import de.intevation.artifacts.CallMeta; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.flys.artifacts.model.minfo.BedHeightFacet; import de.intevation.flys.artifacts.model.minfo.BedHeightFactory; import de.intevation.flys.artifacts.states.StaticState; public class BedHeightsArtifact extends AbstractStaticStateArtifact { /** The logger for this class. */ private static Logger logger = Logger.getLogger(BedHeightsArtifact.class); private static final String NAME = "bedheights"; private static final String STATIC_FACET_NAME = "bedheight"; static { // TODO: Move to configuration. FacetActivity.Registry.getInstance() .register(NAME, FacetActivity.INACTIVE); } public static final String STATIC_STATE_NAME = "state.additional_bedheights.static"; /** Data Item name to know whether we are Heighmarks and reveive * some data slightly different. */ public static final String DATA_HEIGHT_TYPE = "height_marks"; /** * Trivial Constructor. */ public BedHeightsArtifact() { logger.debug("BedHeightsArtifact.BedHeightsArtifact"); } @Override public String getName() { return NAME; } /** * Gets called from factory, to set things up. */ @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callMeta, Document data) { logger.debug("BedHeightsArtifact.setup"); if (logger.isDebugEnabled()) { logger.debug(XMLUtils.toString(data)); } String code = getDatacageIDValue(data); if (code != null) { String [] parts = code.split("-"); if (parts.length >= 4) { String name = parts[0]; String type = parts[1]; String btype = type; int hId = Integer.parseInt(parts[2]); if (name.equals("bedheight")) { addStringData("type", type); addStringData("height_id", parts[2]); addStringData("time", parts[3]); } if (type.equals("singlevalues")) { btype = "single"; } String bedHName = BedHeightFactory.getHeightName(btype, hId); Facet facet = new BedHeightFacet( STATIC_FACET_NAME, bedHName, type); ArrayList<Facet> facets = new ArrayList<Facet>(1); facets.add(facet); addFacets(STATIC_STATE_NAME, facets); } } super.setup(identifier, factory, context, callMeta, data); } @Override protected void initStaticState() { logger.debug("initStaticState " + getName() + " " + identifier()); StaticState state = new StaticState(STATIC_STATE_NAME); DefaultOutput output = new DefaultOutput( "general", "general", "image/png", "chart"); List<Facet> facets = getFacets(STATIC_STATE_NAME); output.addFacets(facets); state.addOutput(output); setStaticState(state); } @Override protected void initialize(Artifact artifact, Object context, CallMeta meta) { // do not clone facets, etc. from master artifact logger.debug("initialize"); importData((FLYSArtifact)artifact, "ld_from"); importData((FLYSArtifact)artifact, "ld_to"); logger.debug("ld_from " + getDataAsString("ld_from")); logger.debug("ld_to " + getDataAsString("ld_to")); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :