Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/WMSHWSLinesArtifact.java @ 7471:fff862f4ef76
Experimental caching of datacage recommendations. The respective hook is called a lot and running the datacage over and over again when loading data can be expensive. So the generated recommendations are cached for some time.
Hopefully this improves the overall speed of loading data from the datacage.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Wed, 30 Oct 2013 15:26:21 +0100 |
parents | af13ceeba52a |
children | 8d5ca5175038 |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.artifacts; import java.util.List; import org.w3c.dom.Document; import org.apache.log4j.Logger; import com.vividsolutions.jts.geom.Envelope; import org.dive4elements.artifacts.ArtifactFactory; import org.dive4elements.artifacts.CallMeta; import org.dive4elements.artifactdatabase.state.DefaultOutput; import org.dive4elements.artifactdatabase.state.Facet; import org.dive4elements.artifactdatabase.state.State; import org.dive4elements.river.model.HWSLine; import org.dive4elements.river.model.River; import org.dive4elements.river.artifacts.model.FacetTypes; import org.dive4elements.river.artifacts.model.RiverFactory; import org.dive4elements.river.utils.RiverUtils; import org.dive4elements.river.utils.GeometryUtils; public class WMSHWSLinesArtifact extends WMSDBArtifact { public static final String NAME = "hws_lines"; private static final Logger logger = Logger.getLogger(WMSHWSLinesArtifact.class); @Override public void setup( String identifier, ArtifactFactory factory, Object context, CallMeta callMeta, Document data) { logger.debug("WMSHWSLinesArtifact.setup"); super.setup(identifier, factory, context, callMeta, data); } @Override public String getName() { return NAME; } @Override public State getCurrentState(Object cc) { State s = new HWSLinesState(this); List<Facet> fs = getFacets(getCurrentStateId()); DefaultOutput o = new DefaultOutput( "floodmap", "floodmap", "image/png", fs, "map"); s.getOutputs().add(o); return s; } public static class HWSLinesState extends WMSDBState implements FacetTypes { private static final Logger logger = Logger.getLogger(HWSLinesState.class); protected int riverId; public HWSLinesState(WMSDBArtifact artifact) { super(artifact); riverId = 0; } public int getRiverId() { if (riverId == 0) { String ids = artifact.getDataAsString("ids"); String[] parts = ids.split(";"); try { riverId = Integer.parseInt(parts[0]); } catch (NumberFormatException nfe) { logger.error("Cannot parse river id from '" + parts[0] + "'"); } } return riverId; } @Override protected String getFacetType() { return FLOODMAP_HWS_LINES; } @Override protected String getUrl() { return RiverUtils.getUserWMSUrl(artifact.identifier()); } @Override protected String getSrid() { River river = RiverFactory.getRiver(getRiverId()); return RiverUtils.getRiverSrid(river.getName()); } @Override protected Envelope getExtent(boolean reproject) { List<HWSLine> hws = HWSLine.getLines(getRiverId(), getName()); Envelope max = null; for (HWSLine h: hws) { Envelope env = h.getGeom().getEnvelopeInternal(); if (max == null) { max = env; continue; } max.expandToInclude(env); } return max != null && reproject ? GeometryUtils.transform(max, getSrid()) : max; } @Override protected String getFilter() { return "river_id=" + String.valueOf(getRiverId()) + " AND name='" + getName() + "'"; } @Override protected String getDataString() { String srid = getSrid(); if (RiverUtils.isUsingOracle()) { return "geom FROM hws_lines USING SRID " + srid; } else { return "geom FROM hws_lines USING UNIQUE id USING SRID " + srid; } } @Override protected String getGeometryType() { return "LINE"; } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :