Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/StaticWQKmsArtifact.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 | a2735a4bf75e |
children | febeb4bb10a5 |
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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.artifactdatabase.state.FacetActivity; import de.intevation.artifacts.Artifact; import de.intevation.artifacts.ArtifactFactory; import de.intevation.artifacts.CallMeta; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.flys.artifacts.model.FacetTypes; import de.intevation.flys.artifacts.model.WQKms; import de.intevation.flys.artifacts.model.WKmsFactory; import de.intevation.flys.artifacts.model.WQKmsFactory; import de.intevation.flys.artifacts.states.DefaultState; /** * Artifact to access additional "waterlevel/discharge"-type of data, like * fixation measurements. * * This artifact neglects (Static)FLYSArtifacts capabilities of interaction * with the StateEngine by overriding the getState*-methods. */ public class StaticWQKmsArtifact extends StaticFLYSArtifact implements FacetTypes { /** The logger for this class. */ private static Logger logger = Logger.getLogger(StaticWQKmsArtifact.class); public static final String STATIC_STATE_NAME = "state.additional_wqkms.static"; private static final String NAME = "staticwqkms"; static { // TODO: Move to configuration. FacetActivity.Registry.getInstance() .register(NAME, FacetActivity.INACTIVE); } /** * Trivial Constructor. */ public StaticWQKmsArtifact() { logger.debug("StaticWQKmsArtifact.StaticWQKmsArtifact"); } /** * Gets called from factory, to set things up. */ @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callMeta, Document data) { logger.debug("StaticWQKmsArtifact.setup"); // Store the 'ids' (from datacage). if (logger.isDebugEnabled()) { logger.debug("StaticWQKmsArtiact.setup" + XMLUtils.toString(data)); } String code = getDatacageIDValue(data); addStringData("ids", code); if (code != null) { String [] parts = code.split("-"); if (parts.length >= 4) { int col = Integer.parseInt(parts[2]); int wst = Integer.parseInt(parts[3]); addStringData("col_pos", parts[2]); addStringData("wst_id", parts[3]); } } // Do this AFTER we have set the col_pos etc. super.setup(identifier, factory, context, callMeta, data); } /** * Called via setup. * * @param artifact The master-artifact. */ @Override protected void initialize( Artifact artifact, Object context, CallMeta meta) { logger.debug("StaticWQKmsArtifact.initialize"); WINFOArtifact winfo = (WINFOArtifact) artifact; // TODO: The river is of no interest, so far., also use importData importData(winfo, "river"); List<Facet> fs = new ArrayList<Facet>(); DefaultState state = (DefaultState) getCurrentState(context); state.computeInit(this, hash(), context, meta, fs); if (!fs.isEmpty()) { logger.debug("Facets to add in StaticWQKmsArtifact.initialize ."); addFacets(getCurrentStateId(), fs); } else { logger.debug("No facets to add in StaticWQKmsArtifact.initialize (" + state.getID() + ")."); } } /** * Get WQKms from factory. * @return WQKms according to parameterization (can be null); */ public WQKms getWQKms() { logger.debug("StaticWQKmsArtifact.getWQKms"); int col = Integer.parseInt(getDataAsString("col_pos")); int wst = Integer.parseInt(getDataAsString("wst_id")); /** TODO do not run twice against db to do this. */ String wkmsName = WKmsFactory.getWKmsName(col, wst); WQKms res = WQKmsFactory.getWQKms(col, wst); res.setName(wkmsName); return res; } /** Return specific name. */ @Override public String getName() { return NAME; } // TODO implement deepCopy. } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :