Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/SQRelationArtifact.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 | 9a14eac637ec |
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.data.DefaultStateData; import de.intevation.artifactdatabase.state.DefaultOutput; import de.intevation.artifactdatabase.state.Facet; import de.intevation.artifacts.ArtifactFactory; import de.intevation.artifacts.ArtifactNamespaceContext; import de.intevation.artifacts.CallMeta; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.flys.artifacts.model.sq.StaticSQRelation; import de.intevation.flys.artifacts.resources.Resources; import de.intevation.flys.artifacts.states.StaticState; import de.intevation.flys.artifacts.states.sq.SQStaticState; public class SQRelationArtifact extends AbstractStaticStateArtifact { private static final Logger logger = Logger.getLogger(SQRelationArtifact.class); public static final String XPATH_RIVER = "/art:action/art:river/@art:name"; public static final String XPATH_STATION = "/art:action/art:measurement_station/@art:number"; public static final String NAME = "staticsqrelation"; public static final String STATIC_STATE_NAME = "state.sqrelation.static"; public static final String UIPROVIDER = "static_sqrelation"; public static final String SQ_RELATION_OUT_A = "sq_relation_a"; public static final String SQ_RELATION_OUT_B = "sq_relation_b"; public static final String SQ_RELATION_OUT_C = "sq_relation_c"; public static final String SQ_RELATION_OUT_D = "sq_relation_d"; public static final String SQ_RELATION_OUT_E = "sq_relation_e"; public static final String SQ_RELATION_OUT_F = "sq_relation_f"; @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callmeta, Document data ) { logger.debug("SQRelationArtifact.setup()"); String river = XMLUtils.xpathString( data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE); String station = XMLUtils.xpathString( data, XPATH_STATION, ArtifactNamespaceContext.INSTANCE); addData( "river", new DefaultStateData( "river", Resources.getMsg(callmeta, "static.sq.river", "Rivername"), "String", river)); addData( "station", new DefaultStateData( "station", Resources.getMsg(callmeta, "static.sq.station", "Station"), "String", station)); super.setup(identifier, factory, context, callmeta, data); } @Override protected void initStaticState() { StaticState state = new SQStaticState(STATIC_STATE_NAME); List<Facet> fs = new ArrayList<Facet>(); state.staticCompute(fs, this); if (hasParameter(StaticSQRelation.Parameter.A, fs)) { DefaultOutput outputA = new DefaultOutput( SQ_RELATION_OUT_A, "output.static.sqrelation.a", "image/png", fs, "chart"); state.addOutput(outputA); } if (hasParameter(StaticSQRelation.Parameter.B, fs)) { DefaultOutput outputB = new DefaultOutput( SQ_RELATION_OUT_B, "output.static.sqrelation.b", "image/png", fs, "chart"); state.addOutput(outputB); } if (hasParameter(StaticSQRelation.Parameter.C, fs)) { DefaultOutput outputC = new DefaultOutput( SQ_RELATION_OUT_C, "output.static.sqrelation.c", "image/png", fs, "chart"); state.addOutput(outputC); } if (hasParameter(StaticSQRelation.Parameter.D, fs)) { DefaultOutput outputD = new DefaultOutput( SQ_RELATION_OUT_D, "output.static.sqrelation.d", "image/png", fs, "chart"); state.addOutput(outputD); } if (hasParameter(StaticSQRelation.Parameter.E, fs)) { DefaultOutput outputE = new DefaultOutput( SQ_RELATION_OUT_E, "output.static.sqrelation.e", "image/png", fs, "chart"); state.addOutput(outputE); } if (hasParameter(StaticSQRelation.Parameter.F, fs)) { DefaultOutput outputF = new DefaultOutput( SQ_RELATION_OUT_F, "output.static.sqrelation.f", "image/png", fs, "chart"); state.addOutput(outputF); } addFacets(STATIC_STATE_NAME, fs); state.setUIProvider(UIPROVIDER); setStaticState(state); } @Override public String getName() { return NAME; } private boolean hasParameter(StaticSQRelation.Parameter p, List<Facet> fs) { for (Facet f : fs) { if (f.getName().equals("sq_" + p.toString().toLowerCase() + "_curve")) { return true; } } return false; } }